Embroidery machine head and embroidery machine

Abstract

The utility model 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 utility model 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 present application relates to a kind of embroidery machine head and embroidery machine, belong to the technical field of embroidery machine. BACKGROUND

[0002] The patent application with the prior art disclosure number CN106835543A regarding embroidery machine discloses a kind of embroidery machine presser foot system with three sets of axial guide device, in the patent application, by three sets of axial guide device reach the presser foot driver does not occur radial rotation, ensure that presser foot even if it is subjected to the torsional force of spring, also does not occur torsion.

[0003] However, applicant finds that the reason causing the rotation of presser foot driver also includes the following: the component used to drive the lifting sliding of presser foot includes three-eye connecting rod, small connecting rod and driving connecting rod, a fixed shaft (the label of the patent in the appendix Figure 3 There is no) is arranged on needle bar driver, small connecting rod is rotatably sleeved in one end of fixed shaft, so that the force of small connecting rod to needle bar driver has certain interval distance in left and right directions and the central axis of guide rod, small connecting rod will produce obvious lateral swing in the process of high-speed operation of embroidery machine, thereby needle bar driver can be rotated around guide rod. SUMMARY

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

[0005] The present application is realized by the following technical solutions.

[0006] An embroidery machine head, comprising a machine shell, a main shaft transversely penetrating the machine shell, a guide rod vertically arranged in the machine shell, a needle bar driver and a presser foot driver slidingly 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 different in vertical position, the needle bar transmission assembly is transmissionally connected with 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 with the second connecting portion and the first presser foot transmission member, and a third presser foot transmission member rotationally connected with the presser foot driver and the first presser foot transmission member; the second connecting portion and the part of the first presser foot transmission member rotationally connected with the second presser foot transmission member are both transversely provided with a first shaft member, and the second presser foot transmission member comprises two first chain plates, one of which is connected with the same side of the two first shaft members, and the other is connected with the same other side of the two first shaft members.

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

[0008] As a further improvement of the application, the second connecting part, the first shaft sleeve of the second presser foot driving part is sleeved with a shaft sleeve or a bearing.

[0009] As a further improvement of the application, the part of the presser foot driver and the first presser foot driving part that rotates to connect the third presser foot driving part is transversely rotatably sleeved with a second shaft, and the third presser foot driving part comprises two second chain links, one of which is connected to the same side of the two second shafts, and the other of which is connected to the same other side of the two second shafts.

[0010] As a further improvement of the application, the second shaft sleeve of the presser foot driver and the first presser foot driving part is sleeved with a shaft sleeve or a bearing.

[0011] As a further improvement of the application, the first connecting part of the needle bar driver is connected with a third shaft arranged transversely, the needle bar driving assembly is located on one side of the needle bar driver and is rotatably connected with the third shaft.

[0012] As a further improvement of the application, the needle bar driving assembly comprises a needle bar driving eccentric cam located in the housing and sleeved on the main shaft, a first needle bar driving part with a rotating fulcrum, a second needle bar driving part rotatably connecting the third shaft and the first needle bar driving part, and a third needle bar driving part rotatably connecting the needle bar driving eccentric cam and the first needle bar driving part.

[0013] As a further improvement of the application, the part of the main shaft located outside the housing is connected with a balancing assembly for offsetting the moment of force generated by the needle bar driving eccentric cam on the housing when the main shaft is running.

[0014] As a further improvement of the application, 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 driving eccentric cam.

[0015] As a further improvement of the application, the part of the housing penetrated by the main shaft is provided with a bearing sleeved on the main shaft.

[0016] As a further improvement of the application, the bearing is connected with a flange plate, which is connected to the housing.

[0017] As a further improvement of the application, the balancing assembly further comprises a first balancing driving part with a rotating fulcrum and a second balancing driving part rotatably connecting the balancing eccentric cam and the first balancing driving part.

[0018] As a further improvement of the present application, the balance assembly further comprises a balance transmission fulcrum shaft transversely connected to the machine shell, the first balance transmission member is rotatably sleeved on the balance transmission fulcrum shaft, and the balance transmission fulcrum shaft serves as the rotation fulcrum of the first balance transmission member; the needle bar transmission assembly has a needle bar transmission fulcrum shaft transversely connected to the machine shell, and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft, the needle bar transmission fulcrum shaft serving as the rotation fulcrum of the first needle bar transmission member.

[0019] As a further improvement of the present application, the balance transmission fulcrum shaft is sleeved with a shaft sleeve or bearing at the position corresponding to the sleeving of the first balance transmission member.

[0020] As a further improvement of the present application, the needle bar transmission fulcrum shaft is sleeved with a shaft sleeve or bearing at the position corresponding to the sleeving of the first needle bar transmission member.

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

[0022] As a further improvement of the present application, the first balance transmission member is provided with a counterweight structure.

[0023] As a further improvement of the present application, the machine shell is provided with a mounting seat having two mounting lugs transversely spaced apart; the presser foot first transmission member is connected with a presser foot transmission fulcrum shaft transversely arranged, the presser foot transmission fulcrum shaft serving as the presser foot transmission fulcrum shaft of the presser foot first transmission member, and the two ends thereof being connected to the two mounting lugs respectively.

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

[0025] As a further improvement of the present application, the mounting seat is detachably connected to the machine shell, the machine shell is provided with a positioning structure transversely arranged, and the mounting seat is slidingly connected to the positioning structure and can slide transversely along the positioning structure.

[0026] As a further improvement of the present application, the mounting seat and the machine shell are an integral structure.

[0027] As a further improvement of the present application, the needle bar driver is provided with a first guide assembly for avoiding the circumferential rotation of the needle bar driver around the guide rod when the needle bar driver is lifted and reciprocated.

[0028] As a further improvement of the present application, the first guiding component has a sliding groove extending along the length direction thereof, and the first guiding element is movably connected with the sliding groove.

[0029] As a further improvement of the present application, the first guiding component has a sliding groove extending along the length direction thereof, and the first guiding element is movably connected with the sliding groove.

[0030] As a further improvement of the present application, the first guiding component and the first guiding element are slidingly or rollingly fitted.

[0031] As a further improvement of the present application, the presser foot driver is provided with a second guiding component for avoiding the presser foot driver rotating around the guiding rod in the course of the presser foot driver lifting and lowering reciprocating movement.

[0032] As a further improvement of the present application, the second guiding component has a sliding groove extending along the length direction thereof, and the second guiding element is movably connected with the sliding groove.

[0033] As a further improvement of the present application, the second guiding component has a sliding groove extending along the length direction thereof, and the second guiding element is movably connected with the sliding groove.

[0034] As a further improvement of the present application, the second guiding component and the second guiding element are slidingly or rollingly fitted.

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

[0036] The present application has the following advantages:

[0037] 1. Two first chain pieces are respectively located on the left and right sides of the second connecting part, so that the force of the second presser foot driving part on the needle bar driver is closer to the central axis of the guide rod in the left and right directions compared with the prior art, so that the embroidery machine reduces the tendency of lateral swing of the second presser foot driving part during high-speed operation, on the one hand, the rotation of the needle bar driver around the guide rod can be effectively inhibited, and the stability is improved; on the other hand, the shaking phenomenon of the presser foot driving assembly caused by the lateral swing tendency during high-speed operation of the embroidery machine can be effectively inhibited, so that the abnormal wear of each component of the presser foot driving assembly, especially the abnormal wear of the connection part of each component, i.e. the first shaft, can be reduced, and then the reliability and stability of the embroidery machine during high-speed operation can be effectively improved;

[0038] 2. The needle bar driver is provided with a first connecting part and a second connecting part, which are respectively used to connect the needle bar driving assembly and the presser foot driving assembly, so that the connection positions of the needle bar driving assembly and the presser foot driving assembly on the needle bar driver are separated, which can effectively reduce the stress load and prolong the service life by reducing the loss;

[0039] 3. The second presser foot driving part and the third presser foot driving part are provided in the form of chain pieces, so that bearings or shaft sleeves can be sleeved outside the first shaft and the second shaft provided at the rotating connection part, thereby reducing abnormal wear, and the structure based on the small connecting rod and the driving connecting rod in the prior art cannot be provided with bearings or shaft sleeves;

[0040] 4. Since the second presser foot driving part adopts the structure of chain pieces, the first presser foot driving part can be closer to the central axis of the guide rod in the left and right directions, so that a larger space is left on one side of the guide rod, and the balance assembly configured by the adjacent embroidery machine head can be arranged, and the balance assembly will not collide with the first presser foot driving part during operation of the embroidery machine, so that the embroidery machine head of the present application can be adapted to embroidery machines with large head distance, and can also be adapted to embroidery machines with small head distance, and the adaptability is more extensive. BRIEF DESCRIPTION OF DRAWINGS

[0041] The preferred embodiments of the present application will be described in detail below with the help of the accompanying drawings, so as to help understand the purposes and advantages of the present application, in which:

[0042] Figure 1 is a schematic view of the embroidery machine head from one perspective;

[0043] Figure 2 is a schematic view of the embroidery machine head from another perspective;

[0044] Figure 3 is a schematic view of the presser foot driving assembly, the needle bar driving assembly and the balance assembly from one perspective;

[0045] Figure 4Fig. 6 is a schematic view of the presser foot drive assembly, the needle bar drive and the presser foot drive from another perspective;

[0046] Figure 5 Fig. 6 is a schematic view of the presser foot drive assembly, the needle bar drive and the presser foot drive from another perspective;

[0047] Figure 6 Fig. 7 is a schematic view of the second presser foot drive;

[0048] Figure 7 Fig. 8 is a schematic view of the third presser foot drive;

[0049] Figure 8 Fig. 9 is a schematic view of the needle bar drive assembly and the needle bar drive;

[0050] Figure 9 Fig. 10 is a schematic view of the balance assembly and the needle bar drive assembly from one perspective;

[0051] Figure 10 Fig. 11 is a schematic view of the balance assembly and the needle bar drive assembly from another perspective;

[0052] Figure 11 Fig. 12 is a schematic view of the mounting base;

[0053] Figure 12 Fig. 13 is a schematic view of the needle bar drive, the presser foot drive, the first guide assembly and the second guide assembly;

[0054] Figure 13 Fig. 14 is a schematic view of the first guide assembly;

[0055] Figure 14 Fig. 15 is a schematic view of the second guide assembly. DETAILED DESCRIPTION

[0056] The present application will be further described below in accordance with the drawings and embodiments.

[0057] In this specification, the orientation terms such as upper, lower, left, right, front, rear, front face, back face, top, bottom and the like mentioned or possibly mentioned are defined with respect to the configuration shown in the drawings, and the words "inner" and "outer" refer to the directions toward or away from the geometric center of a particular component, which are relative concepts, and thus can be changed accordingly depending on the different positions, different use states. Therefore, these or other orientation terms should not be interpreted as limiting terms.

[0058] Embodiment 1

[0059] An embroidery machine head, with reference to Figures 1-5, including the housing 11, the main shaft 12, the guide rod 13, the needle bar driver 14, the presser foot driver 15, the needle bar transmission assembly 3 and the presser foot transmission assembly 2. Wherein, the main shaft 12 is arranged in the lateral direction and penetrates the housing 11, more specifically, the part of the main shaft 12 penetrating the housing 11 is the side wall 111 of the housing 11 or the part of the housing 11 located at the side; it is to be noted that the lateral direction of the main shaft 12 is defined as the left-right direction in the present embodiment. The guide rod 13 is arranged vertically in the housing 11, and the top end and the bottom end of the guide rod 13 are both connected to the housing 11. The needle bar driver 14 and the presser foot driver 15 are both slidingly sleeved on the guide rod 13 and can reciprocate vertically on the guide rod 13, and the needle bar driver 14 is located above the presser foot driver 15. The needle bar transmission assembly 3 is transmissionally connected to the main shaft 12 and the needle bar driver 14, the main shaft 12 is a power mechanism, and under the rotation of the main shaft 12, the needle bar driver 14 is driven to reciprocate vertically on the guide rod 13 through the needle bar transmission assembly 3, and the needle bar driver 14 is used to drive the needle bar to reciprocate vertically. The presser foot transmission assembly 2 is transmissionally connected to the needle bar driver 14 and the presser foot driver 15, to drive the presser foot driver 15 to reciprocate vertically on the guide rod 13, and the presser foot driver 15 is used to drive the presser foot to reciprocate vertically.

[0060] In the present 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 different in vertical position, wherein the first connecting part 14a serves as the connecting part of the needle bar transmission assembly 3, and the second connecting part 14b serves as the connecting part of the presser foot transmission assembly 2.

[0061] In the present embodiment, referring 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. Wherein, the first presser foot transmission member 21 has a rotation pivot point, and the rotation pivot point is located at the rear part of the first presser foot transmission member 21. The second presser foot transmission member 22 is rotationally connected to the second connecting part 14b and the first presser foot transmission member 21, and the part of the second presser foot transmission member 22 rotationally connected to the first presser foot transmission member 21 is located at the middle part 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 of the third presser foot transmission member 23 rotationally connected to the first presser foot transmission member 21 is located at the front part of the first presser foot transmission member 21.

[0062] For the second presser foot transmission member 22, refer to Figure 6 and combine with Figure 5In the embodiment, the first chain piece 221 includes two first shafts 222, and the two first shafts 222 are arranged in a flat sheet structure. The second connecting portion 14b and the part where the first presser foot driving member 21 is rotatably connected to the second presser foot driving member 22 are rotatably arranged through the two first shafts 222, that is, the two first shafts 222 are rotatable relative to the second connecting portion 14b and the first presser foot driving member 21. In addition, the two ends of the two first shafts 222 are arranged to protrude from the left and right sides of the second connecting portion 14b and the first presser foot driving member 21. One of the two first chain pieces 221 is connected to the same side of the two first shafts 222, and the other first chain piece 221 is connected to the other side of the two first shafts 222. The same side and the other side of the two first shafts 222 are the side where the two first shafts 222 protrude from the left side of the second connecting portion 14b and the first presser foot driving member 21, and the side where the two first shafts 222 protrude from the right side of the second connecting portion 14b and the first presser foot driving member 21. It should be noted that the part where the two first chain pieces 221 are connected to the shafts is the part where the shafts protrude, which can be the end or the shaft body.

[0063] More specifically, the first chain piece 221 has a through hole at the part corresponding to the two first shafts 222, so that the chain piece is sleeved on the two first shafts 222. The two sides of the first shaft 222 are provided with fixing members to fixedly connect the first chain piece 221 and the first shaft 222.

[0064] In the embodiment, the two first chain pieces 221 are arranged on the left and right sides of the second connecting portion 14b, so that the force applied by the second presser foot driving member 22 to the needle bar driver 14 is closer to the central axis of the guide rod 13 in the left-right direction compared with the prior art. This can reduce the lateral swing tendency of the second presser foot driving member 22 during high-speed operation of the embroidery machine, which can effectively suppress the rotation of the needle bar driver 14 around the guide rod 13 and improve the stability. In addition, it can effectively reduce the shaking phenomenon of the presser foot driving assembly 2 caused by the lateral swing tendency during high-speed operation of the embroidery machine, thereby reducing the abnormal wear of each component of the presser foot driving assembly 2, especially the abnormal wear of the connection between each component, that is, the first shaft 222. This can effectively improve the reliability and stability of the embroidery machine during high-speed operation.

[0065] Furthermore, it should be noted that in the prior art CN106835543A, the shaft fixed on the needle bar driver is subjected to a large load during high-speed operation of the embroidery machine because its two ends are connected to small connecting rods (equivalent to the second presser foot transmission component 22 in this embodiment) and connecting rods connecting to the cam (equivalent to the needle bar transmission assembly 3 in this embodiment). This makes the shaft very susceptible to damage or even breakage. In this embodiment, however, the needle bar driver 14, by providing a first connecting part 14a and a second connecting part 14b to connect the needle bar transmission assembly 3 and the presser foot transmission assembly 2 respectively, can effectively reduce the load, thereby reducing wear and extending service life.

[0066] In this embodiment, the first connecting part 14a is located above the second connecting part 14b, that is, the presser foot transmission assembly 2 is connected to the needle bar driver 14 at a lower position, thereby making the overall position of the presser foot transmission assembly 2 in the housing 11 lower than that of the prior art.

[0067] In this embodiment, the first shaft 222 through which the second connecting part 14b and the second presser foot transmission member 22 pass is fitted with a bushing or bearing. In this embodiment, a bearing b1 is used, but a bushing could also be used. By using a bearing b1 or a bushing, the first shaft 222 rotates relative to the second connecting part 14b / second presser foot transmission member 22 in a rolling contact manner, which can significantly reduce the friction that occurs during rotation, thereby reducing abnormal wear and improving the stability and reliability during high-speed operation. In contrast, in the prior art CN106835543A, the shaft on the needle bar driver is fixed to the needle bar driver, and one end of the small connecting rod is rotatably sleeved on this shaft. The small connecting rod rotates around the shaft in a sliding manner, resulting in relatively high friction, which makes it prone to damage during high-speed operation. Furthermore, it should be noted that in the prior art CN106835543A, bearings or bushings cannot be installed because the two ends of the shaft on the needle bar driver are respectively fitted with small connecting rods and connecting rods for the cam. Therefore, the shaft can only be fixed on the needle bar driver and cannot be rotatably installed on the needle bar driver as in this embodiment. Therefore, if bearings or bushings are to be installed, they can only be installed on the through holes on the shaft where the small connecting rod is fitted. Installing bearings or bushings requires the small connecting rod to meet certain width and thickness requirements. That is, when improving the prior art CN106835543A, the width and thickness of the small connecting rod need to be increased. The internal space of the embroidery machine is limited. If the width of the small connecting rod is increased, it will cause interference and collision between the small connecting rod and the needle bar driver. If the width (in the left and right direction) is increased, the force exerted by the small connecting rod on the needle bar driver will deviate further from the central axis of the guide rod in the left and right direction, thereby further increasing the tendency of the small connecting rod to swing laterally.

[0068] In this implementation case, refer toFigure 7 And in combination Figure 5 The portions of the presser foot driver 15 and the first presser foot transmission member 21 that rotate to connect the third presser foot transmission member 23 are each transversely rotatably provided with a second shaft member 232. The third presser foot transmission member 23 includes two second chain links 231, one of which simultaneously connects the same side of the two second shaft members 232, and the other of which simultaneously connects 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 second presser foot transmission member 22, and will not be described again here.

[0069] It should be noted that, due to the chain link structure of the second presser foot transmission member 22 and the third presser foot transmission member 23, the first presser foot transmission member 21, the second presser foot transmission member 22, and the third presser foot transmission member 23 have no spacing distance in the left-right direction, so that the presser foot transmission assembly 2 avoids lateral swinging and shaking during high-speed operation of the embroidery machine.

[0070] In the present embodiment, the second shaft member 232 through which the presser foot driver 15 and the first presser foot transmission member 21 pass is provided with a shaft sleeve b2 or a bearing, which is the same as the bearing b1 provided on the first shaft member 222, and will not be described again here.

[0071] Referring to Figure 8 As for the connection manner of the needle bar transmission assembly 3 and the needle bar driver 14, in the present embodiment, the first connection part 14a of the needle bar driver 14 is connected with a transversely arranged third shaft member 321, the needle bar transmission assembly 3 is located on one side of the needle bar driver 14 and is rotatably connected with the third shaft member 321.

[0072] As for the structure of the needle bar transmission assembly 3, in the present 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. The needle bar driving eccentric cam 34 is located in the machine housing 11 and is fixedly sleeved on the main shaft 12, and can rotate around the main shaft 12 under the driving of the main shaft 12. The first needle bar transmission member 31 has a rotation support point, which is located at the rear position of the first needle bar transmission member 31. The second needle bar transmission member 32 is rotatably connected with the third shaft member 321 and the first needle bar transmission member 31, and the portion of the second needle bar transmission member 32 that is rotatably connected with 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 rotatably connected with the needle bar driving eccentric cam 34 and the first needle bar transmission member 31, and the portion of the third needle bar transmission member 33 that is rotatably connected with the first needle bar transmission member 31 is located at the middle position of the first needle bar transmission member 31. The third needle bar transmission member 33 has a ring body structure that is rotatably sleeved on the needle bar driving eccentric cam 34.

[0073] In the embodiment, since the gravity center of the needle bar driving eccentric cam 34 is not on the central axis of the main shaft 12, the needle bar driving eccentric cam 34 will generate a centrifugal force on the main shaft 12 when the main shaft 12 rotates, and since the part (the side wall 111 or the part of the machine shell 11 located on the side) where the needle bar driving eccentric cam 34 and the main shaft 12 pass through the machine shell 11 has a spacing, the needle bar driving eccentric cam 34 will generate a moment of force on the machine shell 11 with the bearing as the fulcrum, so that the machine shell 11 will vibrate, reducing its running stability and service life, and also causing the beam to vibrate. Based on this, the part of the main shaft 12 located outside the machine shell 11 is connected with the balancing assembly 4 for offsetting the moment of force generated by the needle bar driving eccentric cam 34 on the machine shell 11 when the main shaft 12 operates.

[0074] It should be noted that, with reference to Figure 9 and Figure 10 and with reference to Figure 2 , the moment of force generated by the needle bar driving eccentric cam 34 on the machine shell 11 will intensify the vibration of the machine shell 11 during the high-speed operation of the embroidery machine, therefore, in order to achieve high-speed operation, the embroidery machine must be provided with the balancing assembly 4 on the part of the main shaft 12 located outside the machine shell 11 to overcome the problem of vibration.

[0075] In the overall structure layout of the embroidery machine, multiple embroidery machine heads are arranged side by side in the left-right direction, and the main shaft 12 transversely penetrates through the multiple embroidery machine heads. According to the spacing between adjacent embroidery machine heads, the embroidery machine is mainly divided into two types of large head distance and small head distance. For the embroidery machine with large head distance, since the spacing between adjacent embroidery machine heads is large, the balancing assembly 4 located outside the machine shell 11 has sufficient arrangement space; while for the embroidery machine with small head distance, since the spacing between adjacent embroidery machine heads is small, the balancing assembly 4 located outside the machine shell 11 needs to extend into the adjacent machine shell 11. In the prior art CN106835543A, the spacing distance between the central axes of the three-eye connecting rod (equivalent to the first presser foot driving member 21 of the embodiment) and the guide rod in the left-right direction is large, which will cause interference and collision between the balancing assembly 4 and the three-eye connecting rod, therefore, the prior art CN106835543A can only be applied to the embroidery machine with large head distance, and cannot be applied to the embroidery machine with small head distance.

[0076] And the embroidery machine head of the embodiment can be adapted to embroidery machines with large head distance and to embroidery machines with small head distance, and is more widely adaptable.

[0077] For the balancing assembly 4, in the 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. The balancing eccentric cam 43 has its center of gravity not on the central axis of the main shaft 12 due to eccentric arrangement, so that the rotation of the balancing eccentric cam 43 with the main shaft 12 generates a centrifugal force on the main shaft 12 and a torque on the machine 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 that the torques generated by the two on the bearing and the machine housing 11 can be offset, thereby basically eliminating the vibration of the machine head caused by the balancing eccentric cam 43. Since the embroidery machine head is installed on the beam, the vibration of the beam can also be reduced, especially for multi-head embroidery machines or super multi-head embroidery machines provided with multiple embroidery machine heads.

[0078] It should be noted that the eccentric direction refers to the direction in which the center of the needle bar driving 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 driving eccentric cam 34 are opposite does not limit the angle difference between the two eccentric directions to 180°, and the angle difference between the two can be not less than 150°. In addition, the setting of the balancing assembly 4 to offset the torque generated by the needle bar driving eccentric cam 34 on the machine housing 11 does not mean that it can be completely offset. Because the working conditions of the embroidery machine head are complex during high-speed operation of the embroidery machine, and the torque of the needle bar driving eccentric cam 34 on the machine housing 11 is also difficult to quantify, the offset of the torque by the balancing assembly 4 should be understood as basic offset or partial offset.

[0079] In the embodiment, the part (side wall 111 or the part of the machine housing 11 located on the side) of the machine housing 11 penetrated by the main shaft 12 is provided with a bearing b3 sleeved on the main shaft 12, which serves to support and position the main shaft 12, so that the main shaft 12 can penetrate and connect the machine housing 11. The bearing reduces the friction when the main shaft 12 rotates and ensures the rotation accuracy of the main shaft 12.

[0080] In the embodiment, the balance transmission assembly comprises a first balance transmission member 41 and a second balance transmission member 42. The first balance transmission member 41 has a rotation pivot point at the rear portion of the first balance transmission member 41. One end of the second balance transmission member 42 is pivotally connected to the balance eccentric cam 43, and the other end is pivotally connected to the first balance transmission member 41. More specifically, the second balance transmission member 42 has a ring structure which is pivotally sleeved on the balance eccentric cam 43. When the main shaft 12 rotates around the central axis thereof, the first balance transmission member 41 reciprocally swings around the rotation pivot point through the transmission of the balance eccentric cam 43 and the second balance transmission member 42, and the swinging direction of the first balance transmission member 41 is opposite to that of the first needle bar transmission member 31.

[0081] In the embodiment, the balance assembly 4 further comprises a balance transmission pivot shaft 44 which is transversely connected to the casing 11 (the side wall 111 or the portion of the casing 11 located at the side). The first balance transmission member 41 is pivotally sleeved on the balance transmission pivot shaft 44, and the balance transmission pivot shaft 44 serves as the rotation pivot point of the first balance transmission member 41. The needle bar transmission assembly 3 has a needle bar transmission pivot shaft 35 which is transversely connected to the casing 11 and serves as the rotation pivot point of the first needle bar transmission member 31.

[0082] When the balance transmission assembly reciprocally swings, a force is generated on the balance transmission pivot shaft 44. The balance transmission pivot shaft 44 is connected to the casing 11, and the portion of the first balance transmission member 41 which is pivotally connected to the balance transmission pivot shaft 44 is spaced apart from the portion of the balance transmission pivot shaft 44 which is connected to the casing 11. Therefore, a torque is generated on the casing 11. Similarly, when the needle bar transmission assembly 3 reciprocally swings, a torque is also generated on the casing 11. Since the swinging direction of the first balance transmission member 41 is opposite to that of the first needle bar transmission member 31, the force acting on the balance transmission pivot shaft 44 is opposite to that acting on the needle bar transmission pivot shaft 35. Therefore, the torque generated by the needle bar transmission assembly 3 and the torque generated by the balance transmission assembly are counteracted, thereby reducing the vibration of the casing 11.

[0083] In the embodiment, the balance transmission pivot shaft 44 is sleeved with a shaft sleeve or bearing at the portion where the first balance transmission member 41 is sleeved. The needle bar transmission pivot shaft 35 is sleeved with a shaft sleeve or bearing at the portion where the first needle bar transmission member 31 is sleeved. The shaft sleeve or bearing can support and position the first balance transmission member 41 / first needle bar transmission member 31, reduce the friction during rotation, and ensure the rotation accuracy.

[0084] In the embodiment, the balance transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 are the same shaft, and the shaft penetrates the machine housing 11 (the side wall 111 or the part of the machine housing 11 located at the side). On the one hand, the coaxial arrangement of the balance transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 can simplify the overall structure. On the other hand, the balance transmission fulcrum shaft 44 and the needle bar transmission fulcrum shaft 35 are connected to the same position of the machine housing 11, which is conducive to the mutual offset of the torques generated by the two sets of transmission structures.

[0085] In the embodiment, the flange plate 113 is connected to the bearing b3, and the flange plate 113 is connected to the machine housing 11 (the side wall 111 or the part of the machine housing 11 located at the side). Specifically, the flange plate 113 is fixed to the machine housing 11 by a plurality of circumferentially arranged fasteners. On the one hand, the bearing b3 can be firmly arranged at the through hole of the machine housing 11 penetrated by the main shaft 12, and the bearing b3 can stably support the main shaft 12, so that the operation of the main shaft 12, the needle bar drive eccentric cam 34, and the balance eccentric cam 43 remains stable. On the other hand, the flange plate 113 can facilitate assembly and disassembly, and is convenient for later maintenance and maintenance work.

[0086] In the embodiment, the first balance transmission member 41 is provided with a counterweight structure 411 at a part (i.e., the front part of the first balance transmission member 41) away from the balance transmission fulcrum shaft 44. The counterweight structure 411 can offset the overall weight of the needle bar transmission assembly 3, the needle bar drive 14, and the needle bar driven by the needle bar drive 14, so that the torques caused by the two sets of transmission assemblies can be substantially offset each other. The counterweight structure 411 can be mounted on the first balance transmission member 41 or integrated with the first balance transmission member 41.

[0087] In the embodiment, referring to Figure 11 and combining Figure 5 , the machine housing 11 is provided with a mounting seat 5, which is arranged at the rear wall 112 of the machine housing 11 or the part located at the rear of the machine 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 presser first transmission member 21 is connected with a transversely arranged presser transmission fulcrum shaft 24, which serves as the rotation fulcrum of the first presser transmission member 21. The two ends of the presser transmission fulcrum shaft 24 are connected to the two mounting lugs 51, respectively. The two ends of the presser transmission fulcrum shaft 24 can be stably supported, so that the reciprocating swing of the first presser transmission member 21 around the presser transmission fulcrum shaft 24 is more stable and reliable.

[0088] In the embodiment, the needle bar driving fulcrum shaft 35, as the rotation fulcrum of the first needle bar driving member 31, is connected at one end to the mounting lug 51 close to the first needle bar driving member 31. Due to the overall downward movement of the presser foot driving assembly 2, the position of the first presser foot driving member 21 is lower than that in the prior art, so that the balance driving fulcrum shaft 44 and the needle bar driving fulcrum shaft 35 cannot avoid each other in space. Therefore, the mounting seat 5 is provided, and the two mounting lugs 51 of the mounting seat 5 can provide connection to both ends of the presser foot driving fulcrum shaft 24, and one of the mounting lugs 51 also provides connection to one end of the needle bar driving fulcrum shaft 35.

[0089] In the embodiment, the mounting seat 5 is detachably connected to the machine shell 11, and the machine shell 11 has a transversely arranged positioning structure 114. The mounting seat 5 is slidingly connected to the positioning structure 114 and can slide transversely along the positioning structure 114. The positioning structure 114 can be a sliding groove, a sliding rail or the like. When the embroidery machine head is assembled or disassembled, and the presser foot driving assembly and the needle bar driver 14 are moved into or out of the machine shell 11, the mounting seat 5 is adjusted by sliding along the positioning structure 114, thereby playing a role in positioning the presser foot driving assembly 2 as a whole. In addition, the mounting seat 5 and the machine shell 11 can also be an integral structure. In this case, the assembly or disassembly is performed by detachable connection of the presser foot driving fulcrum shaft 24 and the two mounting lugs 51. More specifically, for example, when assembling, the rear part of the first presser foot driving member 21 is inserted between the two mounting lugs 51, then the presser foot driving fulcrum shaft 24 is transversely inserted through the two mounting lugs 51 and the rear part of the first presser foot driving member 21, and finally the two ends of the presser foot driving fulcrum shaft 24 are locked in the mounting lugs 51.

[0090] In the embodiment, although the rotation of the needle bar driver 14 around the guide rod 13 is suppressed to improve stability by improving the presser foot driving assembly 2, the working conditions of the embroidery machine during high-speed operation are relatively complex, and the embroidery machine may be affected by factors such as loosening of parts, wear and resonance, so that the needle bar driver 14 still has the risk of rotating around the guide rod 13. Based on this, referring to Figure 12 and Figure 13 , the needle bar driver 14 is provided with a first guide assembly 6 for avoiding the rotation of the needle bar driver 14 around the guide rod 13 during the reciprocating movement of the needle bar driver 14.

[0091] In the embodiment, the first guide assembly 6 comprises a first guide component 61 extending in a straight line and parallel to the guide rod 13 and moving along a direction parallel to the guide rod 13, and a first guide element 62 movably connected to the first guide component 61 and movable along the first guide component 61, wherein the first guide component 61 or the first guide element 62 is arranged on the presser driver 15. The first guide component 61 and the first guide element 62 are in a cooperative relationship such that they guide each other vertically and limit the relative movement of each other in the horizontal direction. Therefore, one of the first guide component 61 and the first guide element 62 is arranged on the presser driver 15, the vertical guide movement of the first guide component 61 and the first guide element 62 is adapted to the lifting and reciprocating movement of the presser driver 15, and the limitation of the movement in the horizontal direction can effectively avoid the rotation of the presser driver 15 in the circumferential direction.

[0092] It should be noted that, since the presser driving assembly 2 of the embodiment can inhibit the rotation of the needle driver 14 around the guide rod 13, the wear of the first guide component 61 and the first guide element 62 when cooperating is smaller, and the service life is longer, compared with the prior art CN106835543A.

[0093] In the embodiment, the length of the first guide component 61 is not less than the stroke distance of the presser driver 15, so as to avoid the disengagement or jamming of the first guide component 61 and the first guide element 62 during the vertical reciprocating movement of the presser driver 15.

[0094] For the specific structure of the first guide component 61, in the embodiment, the first guide component 61 has a sliding groove 611 extending along the length direction thereof, and the first guide element 62 is movably connected to the sliding groove 611 and can slide along the sliding groove 511.

[0095] For the specific arrangement of the movably connected 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 in a sliding cooperation, the first guide component 61 is provided with a sliding groove, the guide element is in a rigid structure, is inserted into the sliding groove and can slide along the sliding groove, that is, the sliding cooperation between the first guide element 62 and the first guide component 61 is realized. The sliding cooperation relationship has a simple structure, but generates a certain friction, which can cause a large friction loss and easily damage the presser driver 15 under the working condition of high-speed reciprocating movement of the presser driver 15.

[0096] In another embodiment, the first guide element 62 and the first guide component 61 are in rolling fit, the first guide component 61 is provided with a sliding groove, the guide element is provided as a rolling element, which can be provided as a bearing, and the guide element is rolling arranged in the sliding groove and can roll along the sliding groove, so as to realize the rolling fit of the first guide element 62 and the first guide component 61. Compared with the sliding fit, the rolling fit has smaller friction loss, and is more suitable for the application working condition of high-speed reciprocating motion of the presser foot driver 15.

[0097] In the embodiment, the presser foot driver 15 is provided with the second guide assembly 7, which is used to avoid the presser foot driver 15 rotating around the guide rod 13 when the presser foot driver 15 is in lifting and reciprocating motion.

[0098] In the embodiment, referring to Figure 12 and Figure 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 machine housing 11. The second guide component 71 has a sliding groove 711 extending along the length direction thereof, the second guide element 72 is movably connected to the sliding groove 711 and can move along the sliding groove 711. The second guide element 72 and the second guide component 71 are in sliding or rolling fit. The structure, function and effect of the second guide assembly 7 are the same as those of the first guide assembly 6, which will not be described here.

[0099] Embodiment 2:

[0100] An embroidery machine includes an embroidery machine head, the embroidery machine head is as shown in embodiment 1.

[0101] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An embroidery machine head, characterized in that, The utility model relates to a needle bar driving eccentric cam, a first needle bar transmission part with a rotation fulcrum, a second needle bar transmission part rotationally connected with the third shaft and the first needle bar transmission part, and a third needle bar transmission part rotationally connected with the needle bar driving eccentric cam and the first needle bar transmission part. The needle bar driver is provided with a first connecting part and a second connecting part with different vertical positions, and the needle bar transmission part is transmissionally connected with the main shaft and the first connecting part. The presser foot transmission part comprises a first presser foot transmission part with a rotation fulcrum, a second presser foot transmission part rotationally connected with the second connecting part and the first presser foot transmission part, and a third presser foot transmission part rotationally connected with the presser foot driver and the first presser foot transmission part. The second connecting part and the first presser foot transmission part are rotationally provided with first shafts along the lateral direction, and the second presser foot transmission part comprises two first chain links, one of which is connected with the same side of the two first shafts, and the other of which is connected with the same side of the two first shafts. The first connecting part is located above the second connecting part.

2. The embroidery machine head according to claim 1, characterized in that The first shafts are provided with shaft sleeves or bearings.

3. The embroidery machine head of claim 1, wherein The presser foot driver and the first presser foot transmission part are rotationally provided with second shafts along the lateral direction, and the third presser foot transmission part comprises two second chain links, one of which is connected with the same side of the two second shafts, and the other of which is connected with the same side of the two second shafts.

4. The embroidery machine head of claim 1, wherein The second shafts are provided with shaft sleeves or bearings.

5. The embroidery machine head of claim 4, wherein The first connecting part of the needle bar driver is connected with a third shaft provided along the lateral direction, the needle bar transmission part is located on one side of the needle bar driver and is rotationally connected with the third shaft.

6. The embroidery machine head of claim 1, wherein The needle bar transmission part comprises a needle bar driving eccentric cam located in the cabinet and sleeved on the main shaft, a first needle bar transmission part with a rotation fulcrum, a second needle bar transmission part rotationally connected with the third shaft and the first needle bar transmission part, and a third needle bar transmission part rotationally connected with the needle bar driving eccentric cam and the first needle bar transmission part.

7. The embroidery machine head according to claim 6, characterized in that The part of the main shaft located outside the cabinet is connected with a balancing assembly for offsetting the moment of force generated by the needle bar driving eccentric cam on the cabinet when the main shaft operates.

8. The embroidery machine head according to claim 7, characterized in that The balancing assembly comprises a balancing eccentric cam sleeved on the main shaft and opposite to the eccentric direction of the needle bar driving eccentric cam.

9. The embroidery machine head according to claim 8, characterized in that The part of the cabinet penetrated by the main shaft is provided with a bearing sleeved on the main shaft.

10. The embroidery machine head of claim 9, wherein The bearing is connected with a flange plate connected with the cabinet.

11. The embroidery machine head according to claim 10, characterized in that The balancing assembly further comprises a first balancing transmission part with a rotation fulcrum and a second balancing transmission part rotationally connected with the balancing eccentric cam and the first balancing transmission part.

12. The embroidery machine head of claim 8, wherein, ​ 13. The embroidery machine head according to claim 12, characterized in that The balance assembly further comprises a balance transmission fulcrum shaft transversely connected to the machine shell, the first balance transmission member is rotatably sleeved on the balance transmission fulcrum shaft, and the balance transmission fulcrum shaft serves as a rotation fulcrum of the first balance transmission member; the needle bar transmission assembly has a needle bar transmission fulcrum shaft transversely connected to the machine shell, and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft, the needle bar transmission fulcrum shaft serving as a rotation fulcrum of the first needle bar transmission member.

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

15. The embroidery machine head of claim 13, wherein The needle bar transmission fulcrum shaft is sleeved with a shaft sleeve or a bearing at a position corresponding to the sleeving position of the first needle bar transmission member.

16. The embroidery machine head of claim 13, wherein The balance transmission fulcrum shaft and the needle bar transmission fulcrum shaft are the same shaft.

17. The embroidery machine head of claim 12, wherein, The first balance transmission member is provided with a counterweight structure.

18. The embroidery head according to claim 1, characterized in that The machine shell is provided with a mounting seat and a presser foot first transmission member, the mounting seat has two mounting lugs transversely and spaced apart, the presser foot first transmission member is connected with a presser foot transmission fulcrum shaft transversely arranged, the presser foot transmission fulcrum shaft serves as a presser foot transmission fulcrum shaft of the presser foot first transmission member, and both ends of the presser foot transmission fulcrum shaft are connected to the two mounting lugs respectively.

19. The embroidery machine head of claim 18, wherein, The needle bar transmission assembly has a needle bar transmission fulcrum shaft transversely arranged, and a first needle bar transmission member rotatably sleeved on the needle bar transmission fulcrum shaft, the needle bar transmission fulcrum shaft serving as a rotation fulcrum of the first needle bar transmission member, and one end of the needle bar transmission fulcrum shaft being connected to the mounting lug close to the first needle bar transmission member.

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

21. The embroidery head according to claim 18, characterized in that The mounting seat and the machine shell are an integral structure.

22. The embroidery head according to claim 1, characterized in that The needle bar driver is provided with a first guide assembly for avoiding the needle bar driver from rotating circumferentially around the guide rod when the needle bar driver is lifted and reciprocated.

23. The embroidery head according to claim 22, characterized in that The first guide assembly comprises a first guide component and a first guide element, the first guide component is vertically arranged, 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 machine shell.

24. The embroidery head according to claim 23, characterized in that The first guide component has a sliding groove extending along the length direction of the first guide component, the first guide element and the sliding groove are movably connected and can move along the sliding groove.

25. The embroidery head according to claim 23, characterized in that The first guide element and the first guide component are slidingly or rollingly matched.

26. The embroidery head according to claim 1, characterized in that The presser foot driver is provided with a second guide assembly for avoiding the presser foot driver from rotating circumferentially around the guide rod when the presser foot driver is lifted and reciprocated.

27. The embroidery head according to claim 26, characterized in that The second guide assembly comprises a second guide component and a second guide element, the second guide component is vertically arranged, 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 machine shell.

28. The embroidery head according to claim 27, characterized in that The second guide component has a sliding groove extending along the length direction of the second guide component, the second guide element and the sliding groove are movably connected and can move along the sliding groove.

29. The embroidery head according to claim 27, characterized in that The second guide element and the second guide part are slidingly or rollingly engaged.

30. An embroidery machine characterized by comprising: The head of the embroidery machine comprises the head of any one of claims 1-29.

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