Embroidery machine head and embroidery machine

Abstract

The invention discloses a machine head of an embroidery machine. The machine head comprises a machine shell, a main shaft, a guide rod, a needle rod driver, a presser foot driver, a needle rod transmission assembly and a presser foot transmission assembly, a first connecting part and a second connecting part which are different in position in the vertical direction are arranged on the needle rod driver; the presser foot transmission assembly comprises a first presser foot transmission part, a second presser foot transmission part and a third presser foot transmission part; the second connecting part and the part, rotationally connected with the second presser foot transmission piece, of the first presser foot transmission piece are rotationally provided with first shaft pieces in a penetrating mode in the transverse direction, the second presser foot transmission piece comprises two first chain pieces, and one first chain piece is connected with the same sides of the two first shaft pieces at the same time; the other first chain piece is connected with the same other sides of the two first shaft pieces at the same time. The invention also discloses an embroidery machine. The device has the beneficial effects that the rotation of the needle rod driver around the guide rod can be fundamentally and effectively inhibited, and the stability is improved.

Description

Technical Field

[0001] The invention relates to an embroidery machine head and an embroidery machine, belonging to the technical field of embroidery machines. Background Art

[0002] A patent application with the prior art publication number CN106835543A regarding embroidery machines discloses an embroidery machine presser foot system with three sets of axial guiding devices. In this patent application, the three sets of axial guiding devices are used to prevent the presser foot driver from radially rotating, thereby ensuring that the presser foot does not twist even if it is subjected to the torsional force of the spring.

[0003] However, the applicant found that the reasons for the rotation of the presser foot driver also include the following: the components used to drive the presser foot to lift and slide include a three-eye connecting rod, a small connecting rod and a driving connecting rod, and a fixed shaft is provided on the needle bar driver (see the attached patent document). Figure 3 There is no number in the figure), the small connecting rod is rotatably sleeved on one end of the fixed shaft, so that the force applied by the small connecting rod to the needle bar driver has a certain spacing distance from the central axis of the guide rod in the left and right directions. When the embroidery machine is running at high speed, the small connecting rod will produce obvious lateral swing, which will cause the needle bar driver to rotate around the guide rod. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an embroidery machine head and an embroidery machine, which can effectively and fundamentally suppress the rotation of the needle bar driver around the guide rod and improve the stability.

[0005] The present invention is achieved through the following technical solutions.

[0006] An embroidery machine head comprises a casing, a main shaft which passes through the casing horizontally, a guide rod which is vertically arranged in the casing, a needle bar driver and a presser foot driver which are slidably sleeved on the guide rod, a needle bar transmission assembly, and a presser foot transmission assembly; the needle bar driver is provided with a first connecting portion and a second connecting portion which are at different vertical positions, the needle bar transmission assembly transmission-connects the main shaft and the first connecting portion; the presser foot transmission assembly comprises a first presser foot transmission member having a rotating fulcrum, a second presser foot transmission member which rotationally connects the second connecting portion and the first presser foot transmission member, and a third presser foot transmission member which rotationally connects the presser foot driver and the first presser foot transmission member; the second connecting portion and the portion where the first presser foot transmission member rotationally connects the second presser foot transmission member are both rotatably penetrated by a first shaft member in the horizontal direction, the second presser foot transmission member comprises two first chain pieces, one of which is simultaneously connected to the same side of the two first shaft pieces, and the other first chain piece is simultaneously connected to the same other side of the two first shaft pieces.

[0007] As a further improvement of the present invention, the first connecting portion is located above the second connecting portion.

[0008] As a further improvement of the present invention, the first shaft member through which the second connecting portion and the second presser foot transmission member pass is outer-mounted with a shaft sleeve or a bearing.

[0009] As a further improvement of the present invention, the presser foot driver and the portion where the first presser foot transmission member is rotatably connected to the third presser foot transmission member are both laterally rotatably provided with a second shaft member, and the third presser foot transmission member includes two second chain plates, one of the second chain plates is simultaneously connected to the same side of the two second shaft members, and the other second chain plate is simultaneously connected to the same other side of the two second shaft members.

[0010] As a further improvement of the present invention, the presser foot driver and the second shaft member through which the first presser foot transmission member passes are outer-mounted with a shaft sleeve or a bearing.

[0011] As a further improvement of the present invention, the first connecting portion of the needle bar driver is connected to a transversely arranged third shaft member, and the needle bar transmission assembly is located on one side of the needle bar driver and is rotatably connected to the third shaft member.

[0012] As a further improvement of the present invention, the needle bar transmission assembly includes a needle bar driving eccentric cam located in the casing and sleeved on the main shaft, a first needle bar transmission member having a rotating fulcrum, a second needle bar transmission member rotatably connecting the third shaft and the first needle bar transmission member, and a third needle bar transmission member rotatably connecting the needle bar driving eccentric cam and the first needle bar transmission member.

[0013] As a further improvement of the present invention, the portion of the main shaft located outside the housing is connected to a balancing assembly for counteracting the torque effect of the needle bar driving the eccentric cam on the housing when the main shaft is running.

[0014] As a further improvement of the present invention, the balancing assembly includes a balancing eccentric cam, which is sleeved on the main shaft and has an eccentric direction opposite to that of the needle bar driving eccentric cam.

[0015] As a further improvement of the present invention, a bearing sleeved on the main shaft is provided at the portion of the housing through which the main shaft passes.

[0016] As a further improvement of the present invention, the bearing is connected to a flange, and the flange is connected to the casing.

[0017] As a further improvement of the present invention, the balancing assembly further includes a first balancing transmission member having a rotation fulcrum, and a second balancing transmission member rotatably connected to the balancing eccentric cam and the first balancing transmission member.

[0018] As a further improvement of the present invention, the balancing assembly also includes a balancing transmission fulcrum shaft laterally connected to the casing, the first balancing transmission member is rotatably sleeved on the balancing transmission fulcrum shaft, and the balancing transmission fulcrum shaft serves as a rotation fulcrum of the first balancing transmission member; the needle bar transmission assembly has a needle bar transmission fulcrum shaft laterally connected to the casing, and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft, and the needle bar transmission fulcrum shaft serves as a rotation fulcrum of the first needle bar transmission member.

[0019] As a further improvement of the present invention, a sleeve or a bearing is sleeved on a portion of the balance transmission fulcrum shaft corresponding to the sleeved portion of the first balance transmission member.

[0020] As a further improvement of the present invention, a sleeve or a bearing is sleeved on a portion of the needle bar transmission fulcrum shaft corresponding to the sleeved portion of the first needle bar transmission member.

[0021] As a further improvement of the present invention, the balance transmission fulcrum axis and the needle bar transmission fulcrum axis are the same axis.

[0022] As a further improvement of the present invention, the first balancing transmission component is provided with a counterweight structure.

[0023] As a further improvement of the present invention, the casing is provided with a mounting seat, and the mounting seat has two mounting lugs arranged at intervals along the lateral direction; the presser foot first transmission member is connected with a presser foot transmission fulcrum shaft arranged laterally, and the presser foot transmission fulcrum shaft serves as the presser foot transmission fulcrum shaft of the presser foot first transmission member, and its two ends are respectively connected to the two mounting lugs.

[0024] As a further improvement of the present invention, the needle bar transmission assembly has a transversely arranged needle bar transmission fulcrum shaft and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft. The needle bar transmission fulcrum shaft serves as a rotation fulcrum of the first needle bar transmission member, and one end of the needle bar transmission fulcrum shaft is connected to a mounting lug close to the first needle bar transmission member.

[0025] As a further improvement of the present invention, the mounting seat is detachably connected to the casing, the casing has a transversely arranged positioning structure, the mounting seat is slidably connected to the positioning structure, and can slide transversely along the positioning structure.

[0026] As a further improvement of the present invention, the mounting base and the housing are an integrated structure.

[0027] As a further improvement of the present invention, the needle bar driver is provided with a first guide assembly for preventing the needle bar driver from rotating circumferentially around the guide rod when the needle bar driver moves up and down and reciprocates.

[0028] As a further improvement of the present invention, the first guide assembly includes a first guide component and a first guide element, the first guide component is arranged vertically, the first guide element is movably connected to the first guide component and can move along the first guide component, one of the first guide component and the first guide element is arranged on the needle bar driver, and the other is arranged on the housing.

[0029] As a further improvement of the present invention, the first guide component has a slide groove extending along its length direction, and the first guide element is movably connected to the slide groove and can move along the slide groove.

[0030] As a further improvement of the present invention, the first guide element and the first guide component are fitted in a sliding or rolling manner.

[0031] As a further improvement of the present invention, the presser foot driver is provided with a second guide assembly for preventing the presser foot driver from rotating circumferentially around the guide rod when the presser foot driver is in lifting and reciprocating motion.

[0032] As a further improvement of the present invention, the second guide assembly includes a second guide component and a second guide element, the second guide component is arranged vertically, the second guide element is movably connected to the second guide component and can move along the second guide component, one of the second guide component and the second guide element is arranged on the presser foot driver, and the other is arranged on the casing.

[0033] As a further improvement of the present invention, the second guide component has a slide groove extending along its length direction, and the second guide element is movably connected to the slide groove and can move along the slide groove.

[0034] As a further improvement of the present invention, the second guide element and the second guide component are fitted in a sliding or rolling manner.

[0035] An embroidery machine comprises the embroidery machine head.

[0036] Beneficial effects of the present invention: 1. The two first chain pieces are respectively located on the left and right sides of the second connecting part, so that the force applied by the second presser foot transmission member to the needle bar driver is closer to the central axis of the guide rod in the left and right direction than in the prior art, so that the second presser foot transmission member has a reduced tendency to lateral swing during high-speed operation of the embroidery machine. On the one hand, it can effectively and fundamentally suppress the rotation of the needle bar driver around the guide rod, thereby improving stability; on the other hand, it can effectively prevent the shaking of the presser foot transmission assembly caused by the lateral swing tendency during high-speed operation of the embroidery machine, thereby reducing abnormal wear of various components of the presser foot transmission assembly, especially abnormal wear of the first shaft at the connection of various components, thereby effectively improving the reliability and stability of the embroidery machine during high-speed operation; 2. The needle bar driver is provided with a first connection part and a second connection part, which are respectively used to connect the needle bar transmission assembly and the presser foot transmission assembly, so that the connection positions of the needle bar transmission assembly and the presser foot transmission assembly on the needle bar driver are separated, which can effectively reduce the force load, thereby reducing the loss and extending the service life; 3. By setting the second presser foot transmission member and the third presser foot transmission member into a chain plate structure, bearings or sleeves can be sleeved outside the first shaft member and the second shaft member set at the rotation connection part of the two, thereby reducing abnormal wear. However, in the prior art, the structure based on the small connecting rod and the driving connecting rod cannot be provided with bearings or sleeves; 4. Since the second presser foot transmission member adopts a chain-type structure, the first presser foot transmission member can be closer to the central axis of the guide rod in the left-right direction, so that a larger space is left on the side of the guide rod of the casing, and the balancing component configured for the adjacent embroidery machine head can be arranged, and the balancing component will not collide with the first presser foot transmission member during the operation of the embroidery machine, so that the embroidery machine head of the present application can be adapted to embroidery machines with a large head distance, and can also be adapted to embroidery machines with a small head distance, and has a wider adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein: Figure 1 A schematic diagram of an embroidery machine head in one viewing angle; Figure 2 is a schematic diagram of an embroidery machine head from another viewing angle; Figure 3 A schematic diagram of a presser foot transmission assembly, a needle bar transmission assembly and a balance assembly at a viewing angle; Figure 4 is a schematic diagram of a presser foot transmission assembly, a needle bar transmission assembly and a balance assembly from another perspective; Figure 5 It is a schematic diagram of a presser foot transmission assembly, a needle bar driver and a presser foot driver; Figure 6 is a schematic diagram of a second presser foot transmission member; Figure 7 is a schematic diagram of a third presser foot transmission member; Figure 8 is a schematic diagram of a needle bar transmission assembly and a needle bar driver; Fig. 9 A schematic diagram of a balancing assembly and a needle bar transmission assembly at one viewing angle; Fig.10 A schematic diagram of a balancing assembly and a needle bar transmission assembly from another perspective; Fig.11 is a schematic diagram of the mounting base; Fig.12 It is a schematic diagram of a needle bar driver, a presser foot driver, a first guide assembly and a second guide assembly; Fig.13 is a schematic diagram of a first guide assembly; Fig.14 is a schematic diagram of the second guide component. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0039] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0040] Implementation Case 1: An embroidery machine head, referring to Figure 1-Figure 5, including a casing 11, a main shaft 12, a guide rod 13, a needle bar driver 14, a presser foot driver 15, a needle bar transmission assembly 3 and a presser foot transmission assembly 2. Among them, the main shaft 12 is arranged in the horizontal direction and passes through the casing 11. More specifically, the part where the main shaft 12 passes through the casing 11 is the side wall 111 of the casing 11 or the part of the casing 11 located on the side; it should be noted that in this embodiment, the horizontal direction of the main shaft 12 is defined as the left and right direction. The guide rod 13 is vertically arranged in the casing 11, and its top and bottom ends are both connected to the casing 11. The needle bar driver 14 and the presser foot driver 15 are both slidably sleeved on the guide rod 13, and can slide back and forth vertically on the guide rod 13. The needle bar driver 14 is located above the presser foot driver 15. The needle bar transmission assembly 3 is connected to the main shaft 12 and the needle bar driver 14. The main shaft 12 is a power mechanism. Under its rotation, the needle bar transmission assembly 3 drives the needle bar driver 14 to slide back and forth vertically on the guide rod 13. The needle bar driver 14 is used to drive the needle bar to slide back and forth vertically. The presser foot transmission assembly 2 is connected to the needle bar driver 14 and the presser foot driver 15 to drive the presser foot driver 15 to slide back and forth vertically on the guide rod 13. The presser foot driver 15 is used to drive the presser foot to slide back and forth vertically.

[0041] In this embodiment, the needle bar driver 14 is provided with a first connecting part 14a and a second connecting part 14b, and the first connecting part 14a and the second connecting part 14b are in different vertical positions, wherein the first connecting part 14a serves as a connecting part of the needle bar transmission assembly 3, and the second connecting part 14b serves as a connecting part of the presser foot transmission assembly 2.

[0042] In this implementation case, refer to Figure 5 The presser foot transmission assembly 2 includes a first presser foot transmission member 21, a second presser foot transmission member 22, and a third presser foot transmission member 23. The first presser foot transmission member 21 has a rotation fulcrum, and the rotation fulcrum is located at the rear position of the first presser foot transmission member 21. The second presser foot transmission member 22 is rotationally connected to the second connecting portion 14b and the first presser foot transmission member 21, and the part where the second presser foot transmission member 22 is rotationally connected to the first presser foot transmission member 21 is located at the middle position of the first presser foot transmission member 21. The third presser foot transmission member 23 is rotationally connected to the presser foot driver 15 and the first presser foot transmission member 21, and the part where the third presser foot transmission member 23 is rotationally connected to the first presser foot transmission member 21 is located at the front position of the first presser foot transmission member 21.

[0043] For the second presser foot transmission member 22, refer to Figure 6 Combined with Figure 5In this embodiment, it includes two first chain pieces 221 and two first shafts 222. The two first chain pieces 221 are flat sheet structures, wherein the second connecting portion 14b and the first presser foot transmission member 21 are rotatably connected to the second presser foot transmission member 22 through two first shafts 222 in a lateral direction, that is, the two first shafts 222 can rotate relative to the second connecting portion 14b and the first presser foot transmission member 21. In addition, the two ends of the two first shafts 222 are respectively connected from the second connecting portion 14b and the first presser foot transmission member 21. 21, one of the two first chain pieces 221 is connected to the same side of the two first shaft members 222 at the same time, and the other first chain piece 221 is connected to the same other side of the two first shaft members 222 at the same time. The same side and the same other side of the two first shaft members 222 are respectively the side where the two first shaft members 222 pass through the left side of the second connecting portion 14b and the first presser foot transmission member 21, and the side where the two first shaft members 222 pass through the right side of the second connecting portion 14b and the first presser foot transmission member 21. It should be noted that the part where the two first chain pieces 221 are connected to the shaft member is the part where the first shaft member 222 passes through, which can be the end or the shaft body part.

[0044] More specifically, the first chain piece 221 has through holes at positions corresponding to the two first shaft members 222 so that the chain piece is sleeved on the two first shaft members 222 , and fixing members are respectively provided on both sides of the first shaft member 222 to fix the first chain piece 221 and the first shaft member 222 together.

[0045] In this embodiment, the two first chain pieces 221 are respectively located on the left and right sides of the second connecting portion 14b, so that the force applied by the second presser foot transmission member 22 on the needle bar driver 14 in the left and right directions is closer to the central axis of the guide rod 13 than in the prior art, so that the second presser foot transmission member 22 reduces the tendency of lateral swing during the high-speed operation of the embroidery machine. On the one hand, it can effectively suppress the rotation of the needle bar driver 14 around the guide rod 13 fundamentally and improve the stability; on the other hand, it can effectively reduce the shaking phenomenon of the presser foot transmission assembly 2 when the embroidery machine runs at high speed due to the lateral swing tendency, thereby reducing the abnormal wear of the various components of the presser foot transmission assembly 2, especially the abnormal wear of the first shaft member 222 at the connection of the various components, and then the reliability and stability of the embroidery machine during high-speed operation can be effectively improved.

[0046] In addition, it should be noted that in the prior art CN106835543A, the shaft fixed on the needle bar driver is connected to a small connecting rod (equivalent to the second presser foot transmission member 22 of this embodiment) and a connecting rod connected to the cam (equivalent to the needle bar transmission assembly 3 of this embodiment) at both ends, so the shaft will be subjected to a large load during high-speed operation of the embroidery machine, and it is very easy to be damaged or even broken. In this embodiment, the needle bar driver 14 is provided with a first connecting portion 14a and a second connecting portion 14b, which are respectively used to connect the needle bar transmission assembly 3 and the presser foot transmission assembly 2, which can effectively reduce the load, thereby reducing losses and extending the service life.

[0047] In this embodiment, the first connecting portion 14a is located above the second connecting portion 14b, that is, the position where the presser foot transmission assembly 2 is connected to the needle bar driver 14 is lower, so that the overall position of the presser foot transmission assembly 2 in the casing 11 is moved downward compared with the prior art.

[0048] In this embodiment, the first shaft 222 through which the second connecting portion 14b and the second presser foot transmission member 22 are provided is connected with a sleeve or a bearing. In this embodiment, a bearing b1 is provided, which may also be a sleeve. By providing the bearing b1 or the sleeve, the first shaft 222 can rotate relatively in the second connecting portion 14b / the second presser foot transmission member 22 in a rolling contact manner, which can greatly reduce the friction during rotation, thereby reducing abnormal wear and improving stability and reliability during high-speed operation. In the prior art CN106835543A, the shaft on the needle bar driver is fixed on the needle bar driver, and one end of the small connecting rod is rotatably sleeved on the shaft. The small connecting rod rotates around the shaft in a sliding manner, and its friction is relatively high, which makes it easy to be damaged during high-speed operation. Furthermore, it should be noted that in the prior art CN106835543A, bearings or sleeves cannot be provided, because the two ends of the shaft on the needle bar driver are respectively sleeved with the small connecting rod and the connecting rod connected to the cam, so the shaft can only be fixed on the needle bar driver, and cannot be rotatably penetrated on the needle bar driver as in the present embodiment. Therefore, assuming that bearings or sleeves are to be provided, the bearings or sleeves can only be provided on the through hole in which the small connecting rod is sleeved on the shaft, and the provision of bearings or sleeves requires the small connecting rod to meet a certain width and thickness, that is, when technically improving the prior art CN106835543A, it is necessary to increase the width and thickness of the small connecting rod. The space inside the casing of the embroidery machine is limited. If the width of the small connecting rod is increased, the small connecting rod and the needle bar driver will interfere and collide. If the width is increased (in the left and right directions), the force applied by the small connecting rod to the needle bar driver will deviate further from the central axis of the guide rod in the left and right directions, thereby further increasing the tendency of the small connecting rod to swing sideways.

[0049] In this implementation case, refer to Figure 7 Combined with Figure 5 The presser foot driver 15 and the first presser foot transmission member 21 are rotatably connected to the third presser foot transmission member 23, and the second shaft member 232 is rotatably penetrated laterally. The third presser foot transmission member 23 includes two second chain pieces 231, one of which is connected to the same side of the two second shaft members 232, and the other second chain piece 231 is connected to the same other side of the two second shaft members 232. The structure, connection relationship, technical problems solved, and technical effects of the third presser foot transmission member 23 are the same as those of the aforementioned second presser foot transmission member 22, and will not be repeated here.

[0050] It should be noted that since the second presser foot transmission member 22 and the third presser foot transmission member 23 are both chain-type structures, there is no spacing distance between the first presser foot transmission member 21, the second presser foot transmission member 22, and the third presser foot transmission member 23 in the left and right directions, so that the presser foot transmission assembly 2 as a whole can avoid lateral swinging tendency and shaking during the high-speed operation of the embroidery machine.

[0051] In this embodiment, the second shaft 232 through which the presser foot driver 15 and the first presser foot transmission member 21 pass is outer-connected with a sleeve b2 or a bearing, which is the same as the bearing b1 outer-connected with the first shaft 222, and will not be described again.

[0052] Reference Figure 8 Regarding the connection method between the needle bar transmission assembly 3 and the needle bar driver 14, in this embodiment, the first connecting portion 14a of the needle bar driver 14 is connected to a transversely arranged third shaft 321, and the needle bar transmission assembly 3 is located on one side of the needle bar driver 14 and is rotatably connected to the third shaft 321.

[0053] As for the structure of the needle bar transmission assembly 3, in this embodiment, the needle bar transmission assembly 3 includes a needle bar driving eccentric cam 34, a first needle bar transmission member 31, a second needle bar transmission member 32 and a third needle bar transmission member 33. Among them, the needle bar driving eccentric cam 34 is located in the housing 11 and is sleeved and fixed on the main shaft 12, and can rotate around the main shaft 12 under the drive of the main shaft 12. The first needle bar transmission member 31 has a rotation fulcrum, and the rotation fulcrum is located at the rear position of the first needle bar transmission member 31. The second needle bar transmission member 32 is rotationally connected to the third shaft member 321 and the first needle bar transmission member 31, and the part where the second needle bar transmission member 32 is rotationally connected to the first needle bar transmission member 31 is located at the front position of the first needle bar transmission member 31. The third needle bar transmission member 33 is rotationally connected to the needle bar driving eccentric cam 34 and the first needle bar transmission member 31. The portion where the third needle bar transmission member 33 is rotationally connected to the first needle bar transmission member 31 is located in the middle position of the first needle bar transmission member 31. The third needle bar transmission member 33 has a ring structure, and the ring structure can be rotatably mounted outside the needle bar driving eccentric cam 34.

[0054] In this embodiment, since the center of gravity of the needle bar driven eccentric cam 34 is not on the central axis of the main shaft 12, the needle bar driven eccentric cam 34 will generate a centrifugal force on the main shaft 12 when it rotates with the main shaft 12, and since there is a gap between the needle bar driven eccentric cam 34 and the part of the main shaft 12 that passes through the housing 11 (the side wall 111 or the part of the housing 11 located on the side), the needle bar driven eccentric cam 34 will generate a torque on the housing 11 with the bearing as the fulcrum, thereby causing the housing 11 to vibrate, reducing its operating stability and service life, and also causing the beam to vibrate. Based on this, the part of the main shaft 12 located outside the housing 11 is connected to a balancing component 4, which is used to offset the torque generated by the needle bar driven eccentric cam 34 on the housing 11 when the main shaft 12 is running.

[0055] It should be noted that, refer to Fig. 9 and Fig.10 And refer to Figure 2 When the embroidery machine is running at high speed, the torque generated by the needle bar driving the eccentric cam 34 on the casing 11 will aggravate the vibration of the casing 11. Therefore, if the embroidery machine is to run at high speed, a balancing component 4 must be provided on the part of the main shaft 12 outside the casing 11 to overcome the vibration problem.

[0056] In the overall structural layout of the embroidery machine, multiple embroidery machine heads are arranged side by side in the left-right direction, and the main shaft 12 runs through the multiple embroidery machine heads horizontally. According to the spacing between adjacent embroidery machine heads, the embroidery machine is mainly divided into two types: large head spacing and small head spacing. For embroidery machines with large head spacing, since the spacing between adjacent embroidery machine heads is large, the balance component 4 located outside the housing 11 has sufficient layout space; while for embroidery machines with small head spacing, since the spacing between adjacent embroidery machine heads is small, the balance component 4 located outside the housing 11 needs to extend into the adjacent housing 11. In the prior art CN106835543A, the distance between the central axis of the three-eye connecting rod (equivalent to the first presser foot transmission member 21 of this embodiment) and the guide rod in the left-right direction is large, which will cause interference and collision between the balance component 4 and the three-eye connecting rod. Therefore, the prior art CN106835543A can only be applied to embroidery machines with large head spacing, and cannot be applied to embroidery machines with small head spacing.

[0057] In the embroidery machine head of the present embodiment, since the second presser foot transmission member 22 adopts a chain plate structure, the first presser foot transmission member 21 can be closer to the central axis of the guide rod 13 in the left-right direction, so that the housing 11 has a larger space on one side of the guide rod 13, and the balance component 4 configured for the adjacent embroidery machine head can be arranged, and the balance component 4 will not collide with the first presser foot transmission member 21 during the operation of the embroidery machine. Therefore, the embroidery machine head of the present embodiment can be adapted to embroidery machines with large head spacing or small head spacing, and has a wider adaptability.

[0058] As for the balancing assembly 4, in this embodiment, the balancing assembly 4 includes a balancing eccentric cam 43, which is sleeved on the main shaft 12 and has an eccentric direction opposite to that of the needle bar driving eccentric cam 34. Since the balancing eccentric cam 43 is eccentrically arranged, its center of gravity is not on the central axis of the main shaft 12, so the balancing eccentric cam 43 will generate a centrifugal force on the main shaft 12 as the main shaft 12 rotates, and will also generate a torque on the housing 11. Since the eccentric directions of the needle bar driving eccentric cam 34 and the balancing eccentric cam 43 are opposite, the centrifugal forces generated by the two on the main shaft 12 are opposite in direction, so the torques generated by the two on the bearing and the housing 11 can offset each other, thereby basically eliminating the vibration of the machine head caused by the balancing eccentric cam 43. At the same time, since the embroidery machine head is installed on the beam, the vibration of the beam can also be reduced, especially for a multi-head embroidery machine or a super multi-head embroidery machine with multiple embroidery machine heads.

[0059] It should be noted that the eccentric direction refers to the direction in which the center point of the needle bar driven eccentric cam 34 and the balancing eccentric cam 43 deviates from the main shaft 12. In addition, the definition that the eccentric directions of the balancing eccentric cam 43 and the needle bar driven eccentric cam 34 are opposite does not limit the angle difference of the eccentric directions of the two to 180°, and the angle difference between the two is not less than 150°. In addition, the setting of the balancing component 4 to offset the torque effect generated by the needle bar driven eccentric cam 34 on the housing 11 does not mean that it can be completely offset, because during the high-speed operation of the embroidery machine, the working condition of the embroidery machine head is relatively complex, and the torque effect of the needle bar driven eccentric cam 34 on the housing 11 is also difficult to quantify, so the offset of the torque effect by the balancing component 4 should be understood as basic offset or partial offset.

[0060] In this embodiment, a portion of the casing 11 penetrated by the main shaft 12 (the side wall 111 or the portion of the casing 11 located on the side) is provided with a bearing b3 sleeved on the main shaft 12. The bearing b3 supports and positions the main shaft 12, so that the main shaft 12 can penetrate and connect to the casing 11. The bearing reduces the friction when the main shaft 12 rotates and ensures the rotation accuracy of the main shaft 12.

[0061] In this embodiment, the balance transmission assembly includes a first balance transmission member 41 and a second balance transmission member 42. The first balance transmission member 41 has a rotation fulcrum, which is located at the rear of the first balance transmission member 41. One end of the second balance transmission member 42 is rotationally connected to the balance eccentric cam 43, and the other end is rotationally connected to the first balance transmission member 41. More specifically, the second balance transmission member 42 has a ring structure, which is rotatably sleeved on the balance eccentric cam 43. When the main shaft 12 rotates around its central axis, the first balance transmission member 41 is driven by the balance eccentric cam 43 and the second balance transmission member 42, so that the first balance transmission member 41 swings back and forth around the rotation fulcrum, and the swing direction of the first balance transmission member 41 is opposite to the swing direction of the first needle bar transmission member 31.

[0062] In this embodiment, the balancing assembly 4 also includes a balancing transmission fulcrum shaft 44 laterally connected to the casing 11 (the side wall 111 or the part of the casing 11 located on the side), the first balancing transmission member 41 is rotatably sleeved on the balancing transmission fulcrum shaft 44, and the balancing transmission fulcrum shaft 44 serves as the rotation fulcrum of the first balancing transmission member 41; the needle bar transmission assembly 3 has a needle bar transmission fulcrum shaft 35 laterally connected to the casing 11, and the needle bar transmission fulcrum shaft 35 serves as the rotation fulcrum of the first needle bar transmission member 31.

[0063] When the balancing transmission assembly reciprocates, it will generate a force on the balancing transmission fulcrum shaft 44, which is connected to the housing 11, and there is a gap between the part where the first balancing transmission member 41 is rotatably connected to the balancing transmission fulcrum shaft 44 and the part where the balancing transmission fulcrum shaft 44 is connected to the housing 11, so a torque will also be generated on the housing 11. Similarly, the reciprocating swing of the needle bar transmission assembly 3 will also generate a torque on the housing 11. Since the first balancing transmission member 41 and the first needle bar transmission member 31 swing in opposite directions, the force on the balancing transmission fulcrum shaft 44 is opposite to the force on the needle bar transmission fulcrum shaft 35, so the torque of the needle bar transmission assembly 3 and the torque of the balancing transmission assembly on the housing 11 are offset, thereby reducing the vibration of the housing 11.

[0064] In this embodiment, the portion of the balance transmission fulcrum shaft 44 corresponding to the first balance transmission member 41 is sleeved with a sleeve or a bearing, and the portion of the needle bar transmission fulcrum shaft 35 corresponding to the first needle bar transmission member 31 is sleeved with a sleeve or a bearing. The provision of the bearing or sleeve can support and position the first balance transmission member 41 / first needle bar transmission member 31, reduce friction during rotation, and ensure rotation accuracy.

[0065] In this embodiment, the balancing transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 are the same shaft, and the shaft passes through the casing 11 (the side wall 111 or the part of the casing 11 located on the side). On the one hand, the coaxial setting of the balancing transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 can simplify the overall structure. On the other hand, the positions at which the balancing transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 are connected to the casing 11 are the same, which is beneficial to the mutual offset of the torques generated by the two sets of transmission structures.

[0066] In this embodiment, the bearing b3 is connected to a flange 113, and the flange 113 is connected to the casing 11 (the side wall 111 or the side portion of the casing 11). The flange 113 is specifically fixed to the casing 11 by a plurality of surrounding fasteners. On the one hand, the bearing b3 can be firmly set at the through hole of the casing 11 through which the main shaft 12 penetrates, and the bearing b3 can stably support the main shaft 12, so that the operation of the main shaft 12, the needle bar driving eccentric cam 34, and the balancing eccentric cam 43 remains stable. On the other hand, the flange 113 can facilitate assembly and disassembly, which is convenient for later repair and maintenance.

[0067] In this embodiment, a counterweight structure 411 is disposed at a portion of the first balancing transmission member 41 away from the balancing transmission fulcrum shaft 44 (i.e., the front portion of the first balancing transmission member 41), and the counterweight structure 411 can offset the overall weight of the needle bar transmission assembly 3, the needle bar driver 14, and the needle bar driven by the needle bar driver 14, so that the moments caused by the two sets of transmission assemblies on the housing 11 can basically offset each other. The counterweight structure 411 can be installed on the first balancing transmission member 41, or it can be an integral structure with the first balancing transmission member 41.

[0068] In this implementation case, refer to Fig.11 Combined with Figure 5 The housing 11 is provided with a mounting seat 5, which is specifically provided at the rear wall 112 of the housing 11 or at the rear of the housing 11. The mounting seat 5 has two mounting lugs 51, and the two mounting lugs 51 are spaced apart from each other along the left-right direction. The first presser foot transmission member 21 is connected with a presser foot transmission fulcrum shaft 24 which is arranged transversely. The presser foot transmission fulcrum shaft 24 serves as the rotation fulcrum of the first presser foot transmission member 21, and its two ends are respectively connected to the two mounting lugs 51. Both ends of the presser foot transmission fulcrum shaft 24 can obtain stable support, so that the reciprocating swing of the first presser foot transmission member 21 around the presser foot transmission fulcrum shaft 24 is more stable and reliable.

[0069] In this embodiment, the needle bar transmission fulcrum shaft 35 serving as the rotation fulcrum of the first needle bar transmission member 31 has one end connected to a mounting lug 51 close to the first needle bar transmission member 31. Due to the overall downward movement of the presser foot transmission assembly 2, the position of the first presser foot transmission member 21 is lower than that of the prior art, making it impossible for the balance transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 to avoid each other in space. Therefore, by setting a mounting seat 5, the two mounting lugs 51 of the mounting seat 5 can provide a connection between the two ends of the presser foot transmission fulcrum shaft 24, and one of the mounting lugs 51 also provides a connection to one end of the needle bar transmission fulcrum shaft 35.

[0070] In this embodiment, the mounting seat 5 is detachably connected to the housing 11, and the housing 11 has a transversely arranged positioning structure 114. The mounting seat 5 is slidably connected to the positioning structure 114 and can slide transversely along the positioning structure 114. The positioning structure 114 can be set as a slide groove, a slide rail or other structures. When the embroidery machine head is assembled or disassembled, when the presser foot drive assembly and the needle bar driver 14 are moved into or out of the housing 11 as a whole, the mounting seat 5 is slidably adjusted along the positioning structure 114 to play a role in positioning the presser foot transmission assembly 2 as a whole. In addition, the mounting seat 5 and the housing 11 can also be an integrated structure. In this case, the assembly or disassembly is performed through the detachable connection between the presser foot transmission fulcrum shaft 24 and the two mounting lugs 51. More specifically, for example, during assembly, the rear portion of the first presser foot transmission component 21 can be extended between the two mounting lugs 51, and then the presser foot transmission fulcrum shaft 24 can be horizontally passed through the two mounting lugs 51 and the first presser foot transmission component 21, and then the two ends of the presser foot transmission fulcrum shaft 24 can be locked on the mounting lugs 51.

[0071] In this embodiment, although the presser foot transmission assembly 2 is improved to suppress the rotation of the needle bar driver 14 around the guide rod 13 to improve stability, the working conditions of the embroidery machine during high-speed operation are relatively complex and may be affected by factors such as loose components, wear and resonance, resulting in the risk of the needle bar driver 14 still rotating around the guide rod 13. Based on this, refer to Fig.12 and Fig.13 The needle bar driver 14 is provided with a first guide assembly 6, which is used to prevent the needle bar driver 14 from rotating around the guide rod 13 when the needle bar driver 14 moves up and down.

[0072] In this embodiment, the first guide assembly 6 includes a first guide component 61 and a first guide element 62. The first guide component 61 extends in a straight line and is parallel to the guide rod 13, and moves in a direction parallel to the guide rod 13. The first guide element 62 is movably connected to the first guide component 61 and can move along the first guide component 61. The first guide component 61 or the first guide element 62 is arranged on the presser foot driver 15. The matching relationship between the first guide component 61 and the first guide element 62 enables the two to play a vertical guiding role with each other and restricts the relative movement of the two in the horizontal direction. Therefore, one of the two is arranged on the presser foot driver 15, and the vertical guiding movement of the two is adapted to the lifting and reciprocating movement of the presser foot driver 15, and the restriction of movement in the horizontal direction can effectively prevent the presser foot driver 15 from rotating in the circumferential direction.

[0073] It should be noted that, since the presser foot transmission assembly 2 of this embodiment can suppress the rotation of the needle bar driver 14 around the guide rod 13, compared with the prior art CN106835543A, the first guide component 61 and the first guide element 62 have less wear when they cooperate and a longer service life.

[0074] In this embodiment, the length of the first guide component 61 is not less than the travel distance of the presser foot driver 15 to prevent the first guide component 61 and the first guide element 62 from being separated or stuck during the vertical reciprocating motion of the presser foot driver 15.

[0075] As for the specific structural arrangement of the first guide component 61 , in this embodiment, the first guide component 61 has a slide groove 611 extending along its length direction, and the first guide element 62 is movably connected to the slide groove 611 and can slide along the slide groove 511 .

[0076] Regarding the specific setting of the movable connection relationship between the first guide element 62 and the first guide component 61, in one embodiment, the first guide element 62 and the first guide component 61 are slidably matched, the first guide component 61 is provided with a slide groove, and the guide member is a rigid structure, inserted in the slide groove and can slide along the slide groove, that is, the sliding match between the first guide element 62 and the first guide component 61 is achieved. The sliding match relationship structure is simple to set, but it will produce a certain amount of friction. Under the condition of high-speed reciprocating motion of the presser foot driver 15, it will cause large friction loss and easy damage.

[0077] In another embodiment, the first guide element 62 and the first guide component 61 are in rolling cooperation, the first guide component 61 is provided with a slide groove, the guide member is provided as a rolling member, specifically, a bearing, the guide member is provided in a rolling manner in the slide groove and can roll along the slide groove, thus realizing the rolling cooperation between the first guide element 62 and the first guide component 61. Compared with the sliding cooperation, the friction loss of the rolling cooperation is smaller, and it is more suitable for the application condition of the high-speed reciprocating motion of the presser foot driver 15.

[0078] In this embodiment, the presser foot driver 15 is provided with a second guide assembly 7 for preventing the presser foot driver 15 from rotating circumferentially around the guide rod 13 when the presser foot driver 15 is lifted and reciprocated.

[0079] In this implementation case, refer to Fig.12 and Fig.14 The second guide assembly 7 includes a second guide component 71 and a second guide element 72. The second guide component 71 is arranged vertically. The second guide element 72 is movably connected to the second guide component 71 and can move along the second guide component 71. One of the second guide component 71 and the second guide element 72 is arranged on the presser foot driver 15, and the other is arranged on the housing 11. The second guide component 71 has a slide groove 711 extending along its length direction. The second guide element 72 is movably connected to the slide groove 711 and can move along the slide groove 711. The second guide element 72 and the second guide component 71 are in sliding or rolling cooperation. The structure and function of the second guide assembly 7 are the same as those of the first guide assembly 6, and will not be described in detail here.

[0080] Implementation Case 2: An embroidery machine includes an embroidery machine head, and the embroidery machine head is shown in implementation case 1.

[0081] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. An embroidery machine head, characterized in that: include: A casing, a main shaft that runs through the casing horizontally, a guide rod vertically arranged in the casing, a needle bar driver and a presser foot driver slidably sleeved on the guide rod, a needle bar transmission assembly, and a presser foot transmission assembly; The needle bar driver is provided with a first connecting portion and a second connecting portion at different vertical positions, and the needle bar transmission assembly is transmission-connected to the main shaft and the first connecting portion; The presser foot transmission assembly comprises a first presser foot transmission member having a rotation fulcrum, a second presser foot transmission member rotationally connected to the second connecting portion and the first presser foot transmission member, and a third presser foot transmission member rotationally connected to the presser foot driver and the first presser foot transmission member; The second connecting portion and the portion where the first presser foot transmission member is rotatably connected to the second presser foot transmission member are both rotatably provided with a first shaft member in a transverse direction, and the second presser foot transmission member includes two first chain plates, one of which is simultaneously connected to the same side of the two first shaft members, and the other first chain plate is simultaneously connected to the same other side of the two first shaft members.

2. The embroidery machine head according to claim 1, characterized in that: The first connecting portion is located above the second connecting portion.

3. The embroidery machine head according to claim 1, characterized in that: The first shaft member through which the second connecting portion and the second presser foot transmission member pass is outer-mounted with a shaft sleeve or a bearing.

4. The embroidery machine head according to claim 1, characterized in that: The presser foot driver and the portion where the first presser foot transmission member is rotatably connected to the third presser foot transmission member are both laterally rotatably penetrated by a second shaft member, and the third presser foot transmission member includes two second chain plates, one of which is simultaneously connected to the same side of the two second shaft members, and the other second chain plate is simultaneously connected to the same other side of the two second shaft members.

5. The embroidery machine head according to claim 4, characterized in that: The second shaft member through which the presser foot driver and the first presser foot transmission member pass is externally connected with a shaft sleeve or a bearing.

6. The embroidery machine head according to claim 1, characterized in that: The first connecting portion of the needle bar driver is connected to a third shaft member which is arranged transversely. The needle bar transmission assembly is located at one side of the needle bar driver and is rotatably connected to the third shaft member.

7. The embroidery machine head according to claim 6, characterized in that: The needle bar transmission assembly includes a needle bar driving eccentric cam located in the casing and sleeved on the main shaft, a first needle bar transmission member with a rotating fulcrum, a second needle bar transmission member rotatably connected to the third shaft and the first needle bar transmission member, and a third needle bar transmission member rotatably connected to the needle bar driving eccentric cam and the first needle bar transmission member.

8. The embroidery machine head according to claim 1, characterized in that: The portion of the main shaft located outside the housing is connected to a balancing assembly for counteracting the torque effect of the needle bar driving the eccentric cam on the housing when the main shaft is running.

9. The embroidery machine head according to claim 8, characterized in that: The balancing assembly comprises a balancing eccentric cam, which is sleeved on the main shaft and has an eccentric direction opposite to that of the needle bar driven eccentric cam.

10. The embroidery machine head according to claim 9, characterized in that: A bearing sleeved on the main shaft is arranged at a portion of the casing through which the main shaft passes.

11. The embroidery machine head according to claim 10, characterized in that: The bearing is connected with a flange, and the flange is connected to the casing.

12. The embroidery machine head according to claim 8, characterized in that: The balancing assembly further comprises a first balancing transmission member having a rotation fulcrum, and a second balancing transmission member rotatably connected to the balancing eccentric cam and the first balancing transmission member.

13. The embroidery machine head according to claim 12, characterized in that: The balancing assembly also includes a balancing transmission fulcrum shaft laterally connected to the casing, the first balancing transmission member is rotatably sleeved on the balancing transmission fulcrum shaft, and the balancing transmission fulcrum shaft serves as a rotation fulcrum of the first balancing transmission member; the needle bar transmission assembly has a needle bar transmission fulcrum shaft laterally connected to the casing, and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft, and the needle bar transmission fulcrum shaft serves as a rotation fulcrum of the first needle bar transmission member.

14. The embroidery machine head according to claim 13, characterized in that: The portion of the balance transmission fulcrum shaft corresponding to the first balance transmission member is sleeved with a shaft sleeve or a bearing.

15. The embroidery machine head according to claim 13, characterized in that: The position of the needle bar transmission fulcrum shaft corresponding to the first needle bar transmission member is sleeved with a shaft sleeve or a bearing.

16. The embroidery machine head according to claim 13, characterized in that: The balance transmission fulcrum axis and the needle bar transmission fulcrum axis are the same axis.

17. The embroidery machine head according to claim 12, characterized in that: The first balancing transmission member is provided with a counterweight structure.

18. The embroidery machine head according to claim 1, characterized in that: The casing is provided with a mounting seat, and the mounting seat has two mounting lugs arranged at intervals along the transverse direction; the presser foot first transmission member is connected with a presser foot transmission fulcrum shaft arranged transversely, and the presser foot transmission fulcrum shaft serves as the presser foot transmission fulcrum shaft of the presser foot first transmission member, and its two ends are respectively connected to the two mounting lugs.

19. The embroidery machine head according to claim 18, characterized in that: The needle bar transmission assembly comprises a transversely arranged needle bar transmission fulcrum shaft and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft. The needle bar transmission fulcrum shaft serves as a rotation fulcrum of the first needle bar transmission member, and one end of the needle bar transmission fulcrum shaft is connected to a mounting lug close to the first needle bar transmission member.

20. The embroidery machine head according to claim 18, characterized in that: The mounting seat is detachably connected to the housing, and the housing is provided with a transversely arranged positioning structure. The mounting seat is slidably connected to the positioning structure and can slide transversely along the positioning structure.

21. The embroidery machine head according to claim 18, characterized in that: The mounting base and the housing are an integrated structure.

22. The embroidery machine head according to claim 1, characterized in that: The needle bar driver is provided with a first guide assembly, which is used to prevent the needle bar driver from rotating circumferentially around the guide rod when the needle bar driver moves up and down and reciprocates.

23. The embroidery machine head according to claim 22, characterized in that: The first guide assembly includes a first guide component and a first guide element, the first guide component is arranged vertically, the first guide element is movably connected to the first guide component and can move along the first guide component, one of the first guide component and the first guide element is arranged on the needle bar driver, and the other is arranged on the housing.

24. The embroidery machine head according to claim 23, characterized in that: The first guide component has a slide groove extending along its length direction, and the first guide element is movably connected to the slide groove and can move along the slide groove.

25. The embroidery machine head according to claim 23, characterized in that: The first guide element and the first guide component are in sliding or rolling cooperation.

26. The embroidery machine head according to claim 1, characterized in that: The presser foot driver is provided with a second guide assembly, which is used to prevent the presser foot driver from rotating circumferentially around the guide rod when the presser foot driver moves up and down and reciprocates.

27. The embroidery machine head according to claim 26, characterized in that: The second guide assembly includes a second guide component and a second guide element, the second guide component is arranged vertically, the second guide element is movably connected to the second guide component and can move along the second guide component, one of the second guide component and the second guide element is arranged on the presser foot driver, and the other is arranged on the casing.

28. The embroidery machine head according to claim 27, characterized in that: The second guide component has a slide groove extending along the length direction thereof, and the second guide element is movably connected to the slide groove and can move along the slide groove.

29. The embroidery machine head according to claim 27, characterized in that: The second guide element and the second guide component are in sliding or rolling cooperation.

30. An embroidery machine, characterized in that: Including the embroidery machine head described in any one of claims 1-29.

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