A head for an embroidery machine

Abstract

The application discloses an embroidery machine head, which comprises a head shell, needle bars, presser bars, needle nozzle bars, driving structures of the needle bars and the presser bars, and lifting structures of the needle bars and the presser bars. The driving structures are arranged to drive the needle nozzle bars, the needle nozzle bars are provided with driving assemblies for driving the lifting wheels to move, and the driving motors of the driving structures can drive the needle nozzle bars to move according to the requirements of embroidery processes in combination with the swing bar assemblies. When the machine needles or the presser bars need to be lifted, the driving motors of the driving structures can lift the needle nozzle bars through the swing bar assemblies, the lifted needle nozzle bars drive the lifting wheels to move through the driving assemblies, the needle bars or the presser bars are lifted through the lifting wheels, and thus the presser bars and the needle bars are lifted. The embroidery machine head has the beneficial effects that one driving motor can drive the needle nozzle bars to work and lift, the presser bars or the needle bars can be lifted at the same time, the structure of the needle bars and the presser bars of the machine head is greatly simplified, and the driving structure of the simplified embroidery machine head is correspondingly simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of embroidery machine head. BACKGROUND

[0002] The driving of needle nozzle rod, presser foot rod, the lifting of needle nozzle rod and needle rod of existing towel embroidery machine head all need to set independent driving cam or driving motor.The driving and the lifting of corresponding rod piece of setting above-mentioned driving all need complex transmission mechanism, since the space of embroidery machine head is limited, it can lead to the corresponding driving of head to be very bulky or reduce corresponding driving.How to simplify the driving of needle nozzle rod, the lifting transmission structure of presser foot rod, needle nozzle rod and needle rod, it has been a difficult problem in the field. SUMMARY

[0003] The present application provides a kind of embroidery machine head with simple structure to effectively realize the driving transmission of the above-mentioned driving to solve the problem of the driving of needle nozzle rod, presser foot rod, the lifting driving of needle nozzle rod and needle rod of existing embroidery machine head.

[0004] The technical scheme for solving the existing problems of the present application is: a kind of embroidery machine head, including head shell, needle rod, presser foot rod, needle nozzle rod, the driving structure of needle rod and the driving structure of presser foot rod arranged on head shell, the lifting structure of lifting needle rod or / and presser foot, the lifting structure includes corresponding lifting wheel, the lifting wheel is equipped with corresponding lifting curve surface, as improvement, it further includes the driving structure that can drive needle nozzle rod to work and lift, the driving structure includes driving motor, connecting driving motor motor shaft to drive needle nozzle rod swing rod assembly, the needle nozzle rod is equipped with the driving assembly that drives lifting wheel to act.

[0005] As further improvement, the driving assembly includes transmission gear coaxially arranged with lifting wheel, rack matched with transmission gear arranged on needle nozzle rod.

[0006] As further improvement, the transmission gear and the rack are provided with speed-increasing gear; the speed-increasing gear is arranged on the lifting wheel seat of lifting wheel or / and head shell.

[0007] As further improvement, the driving assembly includes transmission wheel, driving block fixedly connected to corresponding position of needle nozzle rod, the transmission wheel is equipped with driving arm that drives transmission wheel to rotate, the driving arm and driving block are provided with sliding groove and sliding block structure or sliding groove and sliding shaft structure that make driving arm drive transmission wheel to rotate while needle nozzle rod reciprocates, the transmission wheel and lifting wheel are provided with transmission structure.

[0008] As further improvement, the transmission structure is belt transmission assembly or gear transmission assembly.

[0009] As a further improvement, the maximum transmission ratio between the transmission wheel and the lifting wheel is 1:2.8, or the gear ratio between the transmission wheel and the lifting wheel is greater than or equal to 2.8:1; the transmission wheel is arranged on the lifting wheel seat of the lifting wheel or / and the head shell.

[0010] As a further improvement, the swing rod assembly includes a swing rod arranged on the motor shaft, and the corresponding end rotatably connects the swing rod and the connecting rod of the needle nozzle rod.

[0011] As a further improvement, a sliding groove sliding shaft structure is arranged between the driving arm and the driving block, the sliding groove sliding shaft structure includes a sliding groove arranged on the driving arm and a sliding shaft arranged on the driving block and matched with the sliding groove.

[0012] As a further improvement, the transmission wheel is a sector gear, and the lifting wheel is provided with a passive gear matched with the sector gear.

[0013] As a further improvement, the lower sliding groove wall of the sliding groove is provided with a short arm that makes the sliding shaft disengage from the sliding groove when the needle nozzle rod moves downward, and the upper sliding groove wall of the sliding groove is provided with a long guide arm that makes the sliding shaft enter the sliding groove when the needle nozzle rod moves upward.

[0014] As a further improvement, the lifting wheel of the lifting structure includes a presser foot lifting wheel matched with the presser foot driving connecting rod and a needle rod lifting wheel matched with the needle rod driving connecting rod, the needle rod lifting wheel and the presser foot lifting wheel are installed on the same driving shaft; the needle rod lifting wheel is arranged on the corresponding side of the head located the needle rod driving connecting rod, and the presser foot lifting wheel is arranged on the other corresponding side of the head located the presser foot driving connecting rod.

[0015] As a further improvement, the needle nozzle rod is located between the needle rod lifting wheel and the presser foot lifting wheel; and the driving assembly is arranged between the needle rod lifting wheel and the presser foot lifting wheel.

[0016] Compared with the prior art, the driving structure is arranged to drive the needle nozzle rod, the needle nozzle rod is provided with a driving assembly that drives the lifting wheel to act, the driving motor of the driving structure drives the needle nozzle rod to act according to the need of embroidery process through the swing rod assembly; when the presser foot or the needle rod needs to be lifted, the driving motor of the driving structure further acts, the needle nozzle rod is lifted through the further movement of the swing rod assembly, the lifted needle nozzle rod drives the lifting wheel to act through the driving assembly, so that the needle rod or the presser foot rod is lifted through the lifting wheel, thereby realizing the lifting of the presser foot and the needle rod. The beneficial effect is that one driving motor can drive the work and lifting of the needle nozzle rod, and can also drive the lifting of the presser foot or / and the needle rod, which greatly simplifies the structure of the head needle rod and the presser foot lifting, and simplifies the driving structure of the embroidery machine head. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1is a structural schematic diagram of the present application.

[0018] Figure 2 is a side view of the present application.

[0019] Figure 3 is Figure 1 an enlarged schematic view at a of

[0020] Figure 4 is Figure 2 an enlarged schematic view at b of

[0021] Figure 5 is a perspective view of the present application in the lifting state.

[0022] Figure 6 is a side view of the present application in the lifting state.

[0023] Figure 7 is another perspective view of the present application in the lifting state.

[0024] Figure 8 is Figure 5 an enlarged schematic view at c of

[0025] Figure 9 is Figure 7 an enlarged schematic view at d of

[0026] Figure 10 is an enlarged view of the present application locally at the driving assembly.

[0027] Figure 11 is a side view of the present application locally at the driving assembly.

[0028] Figure 12 is a structural schematic diagram of the embroidery machine head of the present application.

[0029] needle bar 1, driving motor 11, swing bar 12, connecting rod 13, driven gear 2, presser foot lifting wheel 21, presser foot driving connecting rod 22, lifting wheel seat 3, needle bar lifting wheel 31, needle bar driving connecting rod 32, transmission wheel 4, driving block 41, driving arm 42, sliding groove 43, sliding shaft 44, short arm 45, long arm 46, machine head shell 5. DETAILED DESCRIPTION

[0030] Referring to Figures 1-11The embodiment of the application is a embroidery machine head, which comprises a head shell 9, needle bar, presser bar, needle nozzle bar 1, driving structure of needle bar and driving structure of presser bar, lifting structure of needle bar or / and presser bar, the lifting structure comprises corresponding lifting wheel, the lifting wheel is provided with corresponding lifting curve according to the lifting demand of presser bar or needle bar, the terminal point of lifting curve is generally provided with locking surface for positioning presser bar or needle bar in lifting position. The lifting structure is generally used for lifting presser bar and needle bar. It also comprises driving structure for driving needle nozzle bar 1 to work and lift, the driving structure comprises driving motor 11, connecting driving motor 11 motor shaft driving swing bar 12 assembly of needle nozzle bar 1, the needle nozzle bar 1 is provided with driving assembly for driving lifting wheel to act. The driving assembly in the embodiment can be used for separately controlling the lifting of needle bar, and the presser bar is driven by the existing lifting driving structure to drive presser bar lifting wheel 21; or separately controlling the lifting of presser bar, and the needle bar is lifted by the existing lifting driving structure to drive needle bar lifting wheel 31; or simultaneously controlling the lifting of needle bar and presser bar through the driving assembly.

[0031] The driving assembly can adopt the existing transmission mode of connecting rod, driving wheel, gear and rack, etc., and convert the up and down sliding action of needle nozzle bar during lifting into the rotating action of lifting wheel of needle bar and presser bar, so as to drive needle bar and presser bar to generate lifting action.

[0032] As an embodiment of the driving assembly, the driving assembly comprises transmission gear coaxial with the lifting wheel, and rack matched with the transmission gear arranged on the needle nozzle bar 1. When lifting is needed, the driving motor 11 drives the swing bar 12 assembly to lift the needle nozzle bar 1, the rack of the lifted needle nozzle bar 1 drives the transmission gear coaxial with the lifting wheel, so as to drive the lifting wheel to rotate through the transmission gear, and the rotating lifting wheel drives the needle bar or / and presser bar to lift through the corresponding driving connecting rod. When working is needed, the driving motor 11 drives the swing bar 12 assembly to make the needle nozzle bar 1 descend to the working position, the rack of the descending needle nozzle bar 1 drives the transmission gear coaxial with the lifting wheel, the transmission gear drives the lifting wheel to rotate reversely, so as to make the needle bar or / and presser bar also enter the working position.

[0033] In order to easily drive the lifting of needle bar or / and presser bar when the needle nozzle bar 1 lifts, the transmission gear and the rack are provided with speed increasing gear; the speed increasing gear is arranged on the lifting wheel seat 3 of the lifting wheel or / and the head shell 9, and the speed increasing gear can make the needle bar or / and presser bar more easily generate larger lifting when the needle nozzle bar 1 generates lifting action. The speed increasing gear can be large gear coaxial with small gear, the rack and the small gear are matched to drive the small gear to drive the large gear to rotate, the large gear is matched with the transmission gear, the transmission gear drives the lifting wheel to rotate, so as to perform lifting or lifting release action.

[0034] As another embodiment of the driving assembly, the driving assembly comprises a driving wheel 4 and a driving block 41 fixedly connected to the needle nozzle rod 1, the driving wheel 4 is provided with a driving arm 42 for driving the rotation of the driving wheel 4, and the driving arm 42 and the driving block 41 are provided with a sliding groove and sliding block structure or a sliding groove and sliding shaft structure for driving the driving arm 42 to rotate the driving wheel 4 when the needle nozzle rod 1 reciprocally slides, and the driving wheel 4 and the lifting wheel are provided with a transmission structure for driving the lifting wheel to rotate through the rotating driving wheel. The driving wheel 4 can be a speed increasing wheel. The driving arm 42 can be a part of the circumference of the driving wheel 4, or be arranged on one side of the driving wheel 4 or be coaxially connected with the driving wheel 4. In this embodiment, the driving arm 42 is arranged on one side of the driving wheel 4.

[0035] The transmission structure is a belt transmission assembly, or a gear transmission assembly, or other existing structures that can realize wheel transmission. In this embodiment, the gear transmission assembly is used as the preferred transmission structure.

[0036] In order to achieve better lifting effect, the maximum transmission ratio between the driving wheel 4 and the lifting wheel is 1:2.8, that is, the driving wheel 4 rotates one round, and the lifting wheel rotates at least 2.8 rounds. Generally, gears or synchronous belt transmission is used in the field, and if gears or synchronous belt transmission is used, the gear number ratio between the driving wheel 4 and the lifting wheel is greater than or equal to 2.8:1. The driving wheel 4 is arranged on the lifting wheel seat 3 of the lifting wheel and / or the machine head shell 9. Referring to the drawings, in this embodiment, the driving wheel 4 is coaxially installed with the passive gear 2 of the lifting wheel as the gear drive.

[0037] The swing rod 12 assembly comprises a swing rod 12 arranged on the motor shaft, a connecting rod 13 rotatably connected between the swing rod 12 and the needle nozzle rod 1 at the corresponding end, and a connecting block rotatably connected with the connecting rod 13 arranged on the needle nozzle rod 1.

[0038] The sliding groove and sliding shaft structure between the driving arm 42 and the driving block 41 comprises a sliding groove 43 arranged on the driving arm 42 and a sliding shaft 44 arranged on the driving block 41 and matched with the sliding groove 43.

[0039] The driving wheel 4 is a sector gear, and the lifting wheel is provided with a passive gear 2 matched with the sector gear.

[0040] Although the idle position of the driving connecting rod can be arranged on the curved surface of the corresponding lifting wheel, that is, when the driving motor 11 drives the needle nozzle rod 1 to descend and leave the lifting position and enter the working position through the swing rod assembly, the descending needle nozzle rod 1 drives the corresponding lifting wheel to rotate through the driving assembly, so that the lifting wheel enters the idle position, and the lifting curved surface of the lifting wheel leaves the corresponding driving connecting rod, so as to drive the corresponding driving connecting rod to drive the presser foot or / and the needle rod to also enter the working position.

[0041] Further, in order to drive the motor 11 to drive the needle nose rod 1 into the working position, the load during the working process can be reduced, and the motor 11 only drives the needle nose rod 1 to act. The lower sliding groove wall of the sliding groove 43 is provided with a short arm 45 which is separated from the sliding groove when the needle nose rod 1 moves downward. The short arm 45 is arranged to reduce the length of the lower groove arm in the sliding groove 43. When the motor 11 drives the needle nose rod 1 to move from the lifting position into the working position, the sliding shaft 44 on the needle nose rod 1 slides in the sliding groove 43 and cooperates with the sliding groove 43 when it moves downward, drives the driving arm 42 to rotate reversely, and the driving arm 42 drives the corresponding lifting wheel to rotate reversely through the coaxially installed transmission wheel 4, so that the corresponding lifting wheel enters the idle position, the lifting curve of the lifting wheel is separated from the corresponding driving link, and thus the presser foot or / and the needle rod can be separated from the lifting position and enter the working position. When the sliding shaft 44 drives the corresponding lifting wheel to completely enter the idle position or the lifting curve of the corresponding lifting wheel is completely separated from the corresponding driving link as the needle nose rod 1 moves downward, the sliding shaft 44 is separated from the short arm and slides out of the sliding groove 43, so that the needle nose rod enters the working position or is separated from the lifting position. In this way, when the needle nose rod 1 is in the working position, the motor 11 only drives the needle nose rod to work, and the corresponding speed of the needle nose rod 1 can be greatly improved.

[0042] The upper sliding groove wall of the sliding groove 43 is provided with a guide long arm 46 which enters the sliding groove 43 when the needle nose rod 1 moves upward. When the motor 11 drives the needle nose rod 1 to move from the working position into the lifting position, the sliding shaft 44 on the needle nose rod 1 touches the long arm 46 of the sliding groove 43 when it moves upward, so as to slide in the sliding groove 43 and cooperate with the sliding groove 43, drive the driving arm 42 to rotate, and the driving arm 42 drives the corresponding lifting wheel to rotate through the coaxially installed transmission wheel 4, so that the corresponding lifting wheel enters the lifting curve from the idle position, the lifting curve of the lifting wheel cooperates with the corresponding driving link, and thus the presser foot or / and the needle rod enters the lifting position from the working position.

[0043] As preferred, the lifting structure includes the presser foot lifting wheel 21 which cooperates with the presser foot driving link 22 and the needle rod lifting wheel 31 which cooperates with the needle rod driving link 32. The needle rod lifting wheel 31 is coaxially installed with the presser foot lifting wheel 21. The needle rod lifting wheel 31 is arranged on the corresponding side of the needle rod driving link 32 of the machine head, and the presser foot lifting wheel 21 is arranged on the corresponding side of the presser foot driving link 22 of the machine head.

[0044] As preferred, the needle nose rod 1 is located between the needle rod lifting wheel 31 and the presser foot lifting wheel 21, and the driving assembly is arranged between the needle rod lifting wheel 31 and the presser foot lifting wheel 21. That is, the needle rod lifting wheel 31 is arranged on one side of the needle nose rod 1, and the presser foot lifting wheel 21 is arranged on the other side of the needle nose rod 1.

[0045] The needle bar 1, the presser foot, and the needle bar itself can adopt the structure of the prior art. The driving structure of the presser foot and the driving structure of the needle bar can adopt the structure of the prior art. The presser foot driving connecting rod 22 and the needle bar driving connecting rod 32 can adopt the existing three-eye connecting rod structure. See Figure 6 The needle bar 1, the presser foot, and the needle bar in the lifting state serve as the initial default state.

[0046] When the towel embroidery needs to be completed, the driving motor 11 is reversely rotated, the needle bar 1 is driven by the swing rod assembly to descend to the working position to work. The descending needle bar 1 drives the transmission wheel 4 to reversely rotate through the driving assembly. Specifically, the sliding shaft 44 on the driving block 41 installed on the needle bar 1 cooperates with the sliding groove 43 on the driving arm 42, the sliding shaft 44 is lowered to reversely rotate the driving arm 42 through the sliding groove 42, the driving arm 42 reversely rotates the coaxial transmission wheel 4, the transmission wheel 4 of the sector gear drives the passive gear 2 coaxially installed with the presser foot lifting wheel 21 and the needle bar lifting wheel 31 to cooperate, drives the presser foot lifting wheel 21 and the needle bar lifting wheel 31 to reversely rotate, the reversely rotating presser foot lifting wheel 21 rotates to the idle position, so that the lifting curve thereof is separated from the presser foot driving connecting rod 22; and the reversely rotating needle bar lifting wheel 31 rotates to the idle position, so that the lifting curve thereof is separated from the needle bar driving connecting rod 32. Thus, the needle bar and the presser foot can enter the working position to work. The driving motor 11 drives the needle bar in the working position to work through the swing rod 12 and the connecting rod 13 of the swing rod assembly.

[0047] When the presser foot needs to be lifted, the driving motor 11 is forwardly rotated, the needle bar 1 is driven by the swing rod assembly to ascend and lift to the lifting position. The sliding shaft 44 on the driving block 41 installed on the needle bar 1 cooperates with the sliding groove 43 on the driving arm 42, the sliding shaft 44 is raised to forwardly rotate the driving arm 42 through the sliding groove 42, the driving arm 42 forwardly rotates the coaxial transmission wheel 4, the transmission wheel 4 of the sector gear drives the passive gear 2 coaxially installed with the presser foot lifting wheel 21 and the needle bar lifting wheel 31 to cooperate, drives the presser foot lifting wheel 21 and the needle bar lifting wheel 31 to forwardly rotate, the forwardly rotating presser foot lifting wheel 21 rotates from the idle position to the position where the lifting curve thereof cooperates with the locking surface of the presser foot driving connecting rod 22; and the forwardly rotating needle bar lifting wheel 31 rotates from the idle position to the position where the lifting curve thereof cooperates with the locking surface of the needle bar driving connecting rod 32. Thus, the needle bar and the presser foot are lifted.

[0048] In the embodiment, the sliding shaft can cooperate with the sliding groove provided with the long arm 46 and the short arm 45 when descending and lifting.

[0049] The above-mentioned forward rotation is the rotation of the corresponding structure that can drive the lifting curve of the raised wheel to cooperate with the corresponding driving link, and the rotation of the driving needle rod or the presser foot to generate the lifting action is forward rotation. The reverse rotation is the rotation of the corresponding structure that can drive the lifting curve of the raised wheel to be separated from the cooperation with the corresponding driving link, and the rotation of the driving needle rod or the presser foot to go down and enter the working position is reverse rotation.

Claims

1. An embroidery machine head, comprising a head housing, a needle bar, a presser bar, a needle bar drive structure and a presser bar drive structure, a needle bar or / and presser bar lifting structure provided on the head housing, the lifting structure comprising a corresponding lifting wheel, the lifting wheel being provided with a corresponding lifting curve, characterized in that: The driving structure includes a driving motor, a swing lever assembly connecting the motor shaft of the driving motor to drive the needle nozzle rod, and a driving assembly provided on the needle nozzle rod to drive the lifting wheel to move.

2. The embroidery head of claim 1, wherein: The driving assembly includes a transmission wheel, a driving block fixedly connected to the corresponding position of the needle nozzle rod, a driving arm provided on the transmission wheel to drive the transmission wheel to rotate, a sliding groove and sliding block structure or a sliding groove and sliding shaft structure provided between the driving arm and the driving block to drive the transmission wheel to rotate when the needle nozzle rod moves back and forth, and a transmission structure provided between the transmission wheel and the lifting wheel.

3. The embroidery head of claim 2, wherein: The driving assembly includes a transmission gear coaxially provided on the lifting wheel, and a rack provided on the needle nozzle rod and matched with the transmission gear.

4. The embroidery head of claim 1, wherein: A speed increasing gear is provided between the transmission gear and the rack.

5. The embroidery head according to claim 1 or 4, characterized in that: The speed increasing gear is provided on the lifting wheel seat of the lifting wheel and / or the machine head shell.

6. The embroidery head of claim 1, wherein: The transmission structure is a belt transmission assembly or a gear transmission assembly.

7. The embroidery head of claim 1, wherein: The maximum transmission ratio between the transmission wheel and the lifting wheel is 1:2.8, or the gear ratio between the transmission wheel and the lifting wheel is greater than or equal to 2.8:

1.

8. The embroidery head of claim 1, wherein: The swing lever assembly includes a swing lever provided on the motor shaft, and a connecting rod rotatably connected between the swing lever and the needle nozzle rod.

9. The embroidery head of claim 1, wherein: The transmission wheel is a sector gear, and the lifting wheel is provided with a passive gear matched with the sector gear.

10. The embroidery head of claim 1, wherein: The lower sliding groove wall of the sliding groove is provided with a short arm to make the sliding shaft disengage from the sliding groove when the needle nozzle rod moves downward, and the upper sliding groove wall of the sliding groove is provided with a long guiding arm to make the sliding shaft enter the sliding groove when the needle nozzle rod moves upward.

11. The embroidery head of claim 10, wherein: The transmission wheel is provided on the lifting wheel seat of the lifting wheel and / or the machine head shell. The lifting wheel of the lifting structure includes a presser foot lifting wheel matched with the presser foot driving connecting rod and a needle rod lifting wheel matched with the needle rod driving connecting rod, the needle rod lifting wheel and the presser foot lifting wheel are installed on the same driving shaft, the needle rod lifting wheel is provided on the corresponding side of the machine head relative to the needle rod driving connecting rod, and the presser foot lifting wheel is provided on the other corresponding side of the machine head relative to the presser foot driving connecting rod. The needle nozzle rod is located between the needle rod lifting wheel and the presser foot lifting wheel, and the driving assembly is provided between the needle rod lifting wheel and the presser foot lifting wheel.

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