CN110983661B

CN110983661B - Upper machine head device capable of realizing synchronous rotation of upper thread following machine needle

Info

Publication number: CN110983661B
Application number: CN201911303294.4A
Authority: CN
Inventors: 洪武
Original assignee: Bullmer Electromechanical Technology Co Ltd
Current assignee: Bullmer Electromechanical Technology Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2021-09-28
Anticipated expiration: 2039-12-17
Also published as: CN110983661A

Abstract

The invention relates to a machine head device capable of realizing synchronous rotation of an upper thread random needle, which comprises a machine needle, a rotating shaft rod, a connecting seat, a machine needle seat rotatably arranged on the connecting seat, a first transmission assembly connected with the rotating shaft rod and the machine needle seat, a first axial fixing structure connected with the rotating shaft rod and the connecting seat, a rotation driving mechanism driving the rotating shaft rod to rotate, and an up-and-down driving mechanism.

Description

Upper machine head device capable of realizing synchronous rotation of upper thread following machine needle

Technical Field

The invention relates to the field of sewing machines, in particular to an upper machine head device capable of realizing synchronous rotation of a random needle of an upper thread.

Background

With the development of society, people have higher and higher requirements on the quality of sewing threads. In recent years, machines for improving the appearance of sewing stitches, such as rotary head die machines, needle bar rotary die machines, and the like, have been developed to improve the appearance of sewing stitches. However, the two existing schemes have certain disadvantages, and the rotary head template machine has large moment of inertia and difficult improvement of sewing speed due to the fact that the whole machine head rotates together; the needle bar rotating template machine is small in rotational inertia relatively and high in sewing speed, but has the problems that threading is complicated and the like caused by the fact that a take-up lever is moved above a needle bar, and the problem of winding of upper threads is easy to occur.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention is directed to provide an upper head device capable of synchronously rotating an upper thread follower pin, which is easy to thread upper threads and does not wind the upper threads.

In order to achieve the purpose, the invention provides an upper machine head device capable of realizing synchronous rotation of an upper thread following machine needle, which comprises a machine needle, a rotating shaft rod, a connecting seat, a machine needle seat rotatably arranged on the connecting seat, a first transmission assembly connected with the rotating shaft rod and the machine needle seat, a first axial fixing structure connected with the rotating shaft rod and the connecting seat, a rotation driving mechanism driving the rotating shaft rod to rotate, and an upper and lower driving mechanism, wherein the rotating shaft rod is axially fixed with the connecting seat through the first axial fixing structure, the rotating shaft rod and the machine needle seat are arranged in parallel and in a staggered manner, the machine needle seat is driven to rotate through the first transmission assembly, the machine needle is fixed on the machine needle seat and is positioned on a rotating shaft line of the machine needle seat, a through hole extending along the axial direction is arranged on the machine needle seat, and the upper and lower driving mechanism drives the rotating shaft rod to move up and down.

Further, the device also comprises a second axial fixing structure which is used for connecting the upper and lower driving mechanisms and the rotating shaft rod, wherein the upper and lower driving mechanisms are axially fixed with the rotating shaft rod through the second axial fixing structure and drive the rotating shaft rod to move up and down.

Furthermore, the up-down driving mechanism comprises an up-down driving connecting piece which moves up and down, the second axial fixing structure comprises a first retaining ring and a second retaining ring which are fixed on the rotating shaft rod, and the up-down driving connecting piece is clamped between the first retaining ring and the second retaining ring and is abutted against the first retaining ring and the second retaining ring.

Furthermore, the up-down driving mechanism also comprises an up-down driving connecting rod, one end of the up-down driving connecting rod is hinged with the up-down driving connecting piece, and the other end of the up-down driving connecting rod is hinged with the thread take-up mechanism.

Furthermore, the first transmission assembly comprises a first driving gear coaxially fixed on the rotating shaft rod and a first driven gear coaxially fixed with the needle seat, and the first driving gear is in meshing transmission with the first driven gear.

Furthermore, the rotation driving mechanism comprises a motor and a second transmission assembly connected with the motor output shaft and the rotating shaft rod, the rotating shaft rod is driven to rotate through the second transmission assembly when the motor output shaft rotates, and the rotating shaft rod can move up and down relative to the second transmission assembly along the axial direction of the rotating shaft rod.

Further, the second transmission assembly comprises a second driving gear fixed on the output shaft of the motor and a second driven gear which is coaxial with the rotating shaft and fixed in the circumferential direction, the rotating shaft can move relatively in the second driven gear, and the second driving gear is in meshing transmission with the second driven gear.

Further, the first axial fixing structure comprises a second retaining ring and a third retaining ring which are fixed on the rotating shaft rod, and the connecting seat is installed between the second retaining ring and the third retaining ring and is abutted against the second retaining ring and the third retaining ring.

Furthermore, the first axial fixing structure comprises a shaft lever sleeve, an upper positioning sleeve fixed on the rotating shaft lever and a lower positioning surface fixed with the rotating shaft lever, the rotating shaft lever penetrates through the shaft lever sleeve, two ends of the shaft lever sleeve respectively abut against the upper positioning sleeve and the lower positioning surface, and the connecting seat is fixedly connected with the shaft lever sleeve.

The shaft rod sleeve is fixedly connected with the upper and lower driving mechanisms, and the shaft rod sleeve, the upper positioning sleeve and the lower positioning surface form a second axial fixing structure together.

As described above, the upper head device according to the present invention has the following advantageous effects:

through setting up the rotatory axostylus axostyle, the connecting seat, the needle file, a drive assembly, the first axial fixed knot constructs, and rotate actuating mechanism, during the use, the upper thread passes the line through-hole from the top and then passes on the hole of eedle, rotate through rotating actuating mechanism drive rotatory axostylus axostyle, it rotates to drive the needle file through a drive assembly, thereby can drive eedle and upper thread and rotate together, because the rotatory axostylus axostyle is parallel to each other and stagger the arrangement with the needle file, when needle file drive eedle and upper thread rotate together, the upper thread can not take place to tie a knot with the rotatory axostylus axostyle and twine, also can not cause the upper thread to take place to tie a knot with the eedle and twine, and simultaneously, at sewing in-process, upper and lower actuating mechanism drives rotatory axostylus axostyle and the synchronous up-and-down motion of connecting seat, thereby realize sewing work. According to the upper machine head device, the rotating shaft rod and the machine needle are separated and staggered, and the machine needle and the upper thread rotate synchronously, so that forward sewing can be always kept, sewing of perfect stitches is realized, the rotational inertia is small, the sewing is more flexible, the problem that the upper thread is easy to wind the needle rod and the machine needle in the existing design is solved, and the threading of the upper thread is simple and convenient.

Drawings

Fig. 1 is a schematic structural diagram of an upper head device according to a first embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is an assembly view of the structure in the circle a of fig. 2, which is a sectional view.

Fig. 4 is an exploded view of the assembly of the structure within circle a of fig. 2.

Fig. 5 is a front view of fig. 4.

Fig. 6 is a schematic structural diagram of an upper head device according to a second embodiment of the present invention. Fig. 7 is a front view of fig. 6.

Fig. 8 is an assembly view of the structure in circle B of fig. 7, which is a cross-sectional view.

Fig. 9 is an exploded view of the assembly of the structure within circle B of fig. 7.

Fig. 10 is a front view of fig. 9.

Description of the element reference numerals

1 machine needle

Needle seat of 2-machine

21 line through hole

3 rotating shaft lever

4 connecting seat

41 upper seat part

42 lower seat part

43 connecting pipe part

5 Up-and-down driving mechanism

51 Up-and-down driving connecting piece

52 up-and-down driving connecting rod

6 first transmission assembly

61 first driving gear

62 first driven gear

7 rotation driving mechanism

71 electric machine

72 second driving gear

73 second driven gear

74 bearing

8 first retainer ring

9 second stop ring

10 third retainer ring

11 guide slide rail

12 guide slide block

13 upper sleeve

14 casing

15 shaft sleeve

16 upper positioning sleeve

17 lower locating surface

18 circlip

19 face line

20 take-up mechanism

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1 to 10, the invention provides an upper machine head device capable of realizing synchronous rotation of a facial line random needle, which comprises a needle 1, a rotating shaft rod 3, a connecting seat 4, a needle seat 2 rotatably mounted on the connecting seat 4, a first transmission assembly 6 connecting the rotating shaft rod 3 and the needle seat 2, a first axial fixing structure connecting the rotating shaft rod 3 and the connecting seat 4, a rotation driving mechanism 7 driving the rotating shaft rod 3 to rotate, and an up-and-down driving mechanism 5, wherein the rotating shaft rod 3 is axially fixed with the connecting seat 4 through the first axial fixing structure, the rotating shaft rod 3 is parallel to and staggered with the needle seat 2, and drives the needle seat 2 to rotate through the first transmission assembly 6, the needle 1 is fixed on the needle seat 2 and is positioned on a rotating axis of the needle seat 2, and the needle seat 2 is provided with a through-line through hole 21 extending along the axial direction; the up-down driving mechanism 5 drives the rotation shaft 3 to move up and down.

The upper machine head device of the invention has the working principle that: the 3 vertical arrangements of rotatory axostylus axostyle through first axial fixity structure and 4 axial fixings of connecting seat, realize both synchronous up-and-down motion, but rotatory axostylus axostyle 3 free rotation does not receive connecting seat 4 restriction. When in use, the upper thread 19 passes through the thread through hole 21 from the upper part and then passes through the hole of the needle 1, wherein the size and the shape of the thread through hole 21 can be determined according to specific conditions. When sewing is carried out, the rotating shaft lever 3 is driven to rotate by controlling the action of the rotating driving mechanism 7, the rotating shaft lever 3 drives the machine needle seat 2 to rotate through the transmission of the first transmission component 6, so that the machine needle 1 and the upper thread 19 can be driven to rotate together along the axis without limitation, the rotating shaft lever 3 and the machine needle seat 2 are arranged in parallel and staggered, the rotating shaft lever 3 and the machine needle seat 2 keep a proper distance according to the actual condition, when the machine needle seat 2 drives the machine needle 1 and the upper thread 19 to rotate together, the upper thread 19 and the rotating shaft lever 3 cannot interfere, so that the upper thread 19 cannot be knotted and wound with the rotating shaft lever 3, the upper thread 19 and the machine needle 1 cannot be knotted and wound, therefore, when sewing, the upper thread rotates through the machine needle seat, meanwhile, the rotating body is synchronously rotated by matching with the shuttle needle, forward sewing can be always kept, the requirement of attractive stitch is met, and meanwhile, the rotating shaft lever 3 is driven by the upper and lower driving mechanism 5 to move up and down, the first axis fixing structure drives the connecting seat 4 to synchronously move up and down, so that the up and down movement of the needle 1 is realized, and the sewing work is smoothly realized.

In the upper machine head device of the invention, the rotating shaft rod 3, the first transmission component 6 and the connecting seat 4 together play the role of a needle rod mechanism in the traditional upper machine head device and are used for driving the machine needle 1 to rotate and move up and down. The rotating shaft lever 3 can be hollow or solid, and needle bar parts in the existing design can be used in the actual design process.

According to the upper machine head device, the rotating shaft rod 3, the first transmission assembly 6 and the machine needle seat 2 are adopted, the rotating shaft rod 3 is separated from the machine needle 1 and staggered, the machine needle 1 and the upper thread 19 can rotate synchronously, the problem of winding of the upper thread 19 is avoided, so that forward sewing can be always kept, and sewing of perfect stitches is realized; compared with a rotary head sewing machine, the rotary inertia is small, and the sewing is more flexible; overcomes the problem that the needle rod and the needle 1 are easily wound by the upper thread 19 in the prior design, and the upper thread 19 is easy and convenient to thread.

The upper head device of the present invention is further described below by two preferred embodiments, wherein fig. 1 to 5 are schematic structural diagrams of the first embodiment, and fig. 6 to 7 are schematic structural diagrams of the second embodiment.

The first embodiment is as follows:

as a preferable design, in this embodiment, referring to fig. 1 and fig. 2, the upper head device further includes a second axial fixing structure connecting the upper and lower driving mechanism 5 and the rotating shaft 3, the upper and lower driving mechanism 5 is axially fixed with the rotating shaft 3 through the second axial fixing structure, and drives the rotating shaft 3 to move up and down, so as to drive the connecting seat 4 and the needle holder 2 to move synchronously, and the second axial fixing structure does not affect the free rotation of the rotating shaft 3.

Further, in the present embodiment, the up-down driving mechanism 5 includes an up-down driving connecting member 51 moving up and down, the second axial fixing structure includes a first retaining ring 8 and a second retaining ring 9 fixed on the rotating shaft 3, and the up-down driving connecting member 51 is clamped between the first retaining ring 8 and the second retaining ring 9 and abuts against both the first retaining ring 8 and the second retaining ring 9. When the up-and-down driving connecting piece 51 moves up or down, the rotating shaft lever 3 is driven to move up or down synchronously by abutting against the first retaining ring 8 or the second retaining ring 9, and the up-and-down driving connecting piece 51 does not influence the smooth rotation of the rotating shaft lever 3. Further, in this embodiment, the upper and lower driving connecting member 51 is provided with a limiting slider at an end, the limiting slider is provided with an arc notch, the wire guiding block of the rotating shaft 3 is clamped between the first retaining ring 8 and the second retaining ring 9, and the rotating shaft 3 is located in the arc notch, so as to guide the rotating shaft 3.

Further, the up-down driving mechanism 5 further includes an up-down driving link 52 having one end hinged to the up-down driving link 51, and the other end of the up-down driving link 52 is hinged to the thread take-up mechanism 20, so that the up-down movement of the rotating shaft 3 is coordinated and linked with the movement of the thread take-up mechanism 20 by the up-down driving link 52 being hinged to the relevant structure of the thread take-up mechanism 20. The second axial fixing structure in the embodiment has a simple structure, works stably and reliably, the rotating shaft rod 3 can use needle rod parts in the existing design, and the thread take-up mechanism 20 can also keep the form and the installation mode in the existing design unchanged and does not need to move above the rotating shaft rod 3. Of course, in other embodiments, the second axial fixing structure may also adopt other existing structures, and the above functions may be achieved.

Referring to fig. 1 to 5, in the present embodiment, the first transmission assembly 6 includes a first driving gear 61 coaxially fixed on the rotating shaft 3, and a first driven gear 62 coaxially fixed with the needle holder 2, and the first driving gear 61 and the first driven gear 62 are in meshing transmission, so as to realize the synchronous rotation of the rotating shaft 3 and the needle holder 2. The mode that adopts first driving gear 61 and first driven gear 62 parallel arrangement, the convenient control rotating shaft lever 3 is parallel with the needle bar seat 2 and the reasonable interval between the two. The needle holder 2 is preferably integrated with the first driven gear 62, so that the transmission structure can be more compact. Of course, in other embodiments, the first transmission assembly 6 may also adopt other existing transmission structures to achieve the above-mentioned transmission function.

In the present embodiment, referring to fig. 3 to 5, as a preferred design, the connecting seat 4 includes an upper seat portion 41 and a lower seat portion 42, a mounting cavity is provided between the upper seat portion 41 and the lower seat portion 42, the first transmission assembly 6 and the needle holder 2 are mounted in the mounting cavity, and the lower end of the rotating shaft 3 is located in the connecting seat 4, so that the first transmission assembly 6 has good protection and ensures the working stability thereof. Further, still be equipped with connecting tube portion 43 on the upper seat portion 41, the connecting tube portion 43 is worn to establish by the lower extreme of rotatory axostylus axostyle 3, increases the stability of being connected between rotatory axostylus axostyle 3 and the connecting seat 4.

In this embodiment, as a preferred design, referring to fig. 3 to 5, the upper head device further includes a guide rail 11 and a guide slider 12 mounted on the guide rail 11, the connecting seat 4 is fixedly connected to the guide slider 12, the guide rail 11 is disposed along the up-down direction, the guide rail 11 and the guide slider 12 serve to stably guide the up-down movement of the connecting seat 4, and the guide slider 12 can also limit the rotation of the connecting seat 4, so as to ensure the stability of the thread take-up operation. Further, the upper head device is further provided with an upper sleeve 13 and a lower sleeve 14, and the rotating shaft 3 is positioned in the upper sleeve 13 and the lower sleeve 14, thereby enhancing the stability of the rotating shaft 3.

As a preferred design, in this embodiment, referring to fig. 1 and fig. 2, the rotation driving mechanism 7 includes a motor 71, and a second transmission assembly connecting an output shaft of the motor 71 and the rotating shaft 3, the rotating shaft 3 is driven to rotate by the second transmission assembly when the output shaft of the motor 71 rotates, and the rotating shaft 3 can move along its axial direction relative to the second transmission assembly. In this embodiment, preferably, the second transmission assembly includes a second driving gear 72 fixed on the output shaft of the motor 71, and a second driven gear 73 coaxial with and circumferentially fixed to the rotating shaft 3, the rotating shaft 3 can move up and down in the second driving gear 72, the second driving gear 72 is in mesh transmission with the second driven gear 73, and the second driven gear 73 can be specifically installed through a bearing 74. Wherein, the connecting mode that rotatory axostylus axostyle 3 and second driven gear 73 adopt circumference fixed, but the axial freedom relative slip can be realized through making the non-circular with rotatory axostylus axostyle 3 cross section to make the mode that rotatory axostylus axostyle 3 cross section looks adaptation with second driven gear 73 centre bore, see figure 1, or adopt common keyway complex mode. Thereby, the rotation of the rotating shaft 3 can be controlled by the motor 71 and the first transmission assembly 6, and the smooth up-and-down movement of the rotating shaft 3 can be ensured. The rotation of the rotating shaft lever 3 is driven by the motor 71, and the electric control system of the sewing machine can control the rotating speed, the rotating direction and the rotating time of the sewing machine according to the sewing image patterns, so as to control the rotating speed, the rotating direction and the rotating time of the machine needle 1 and realize the sewing of perfect stitches.

As a preferred design, in the present embodiment, referring to fig. 1, 3 and 5, the first axial fixing structure includes a second retaining ring 9 and a third retaining ring 10 fixed on the rotating shaft 3, and the connecting seat 4 is installed between the second retaining ring 9 and the third retaining ring 10 and is abutted against both the second retaining ring 9 and the third retaining ring 10. In the present embodiment, the third retainer ring 10 is fixed at the lower end of the rotating shaft, and the third retainer ring 10 is located in the mounting cavity of the connecting seat 4 and abuts against the lower end surface of the upper seat portion 41 of the connecting seat 4. When the rotating shaft lever 3 moves upwards or downwards, the rotating connecting seat 4 is driven to move upwards or downwards synchronously by abutting against the second retaining ring 9 or the third retaining ring 10, and meanwhile, the smooth rotation of the rotating shaft lever 3 is not influenced. The first axial fixing structure in the embodiment has a simple structure and works stably and reliably. Of course, in other embodiments, the first axial fixing structure may also adopt other existing structures, and the above functions may be achieved.

Example two:

referring to fig. 6 to 10, the present embodiment is an improvement on the first embodiment, and is different in that a second axial fixing structure and a first axial fixing structure are adopted, and the rest parts are basically the same, so that the description is omitted.

In this embodiment, the first axial fixing structure includes a shaft sleeve 15, an upper positioning sleeve 16 fixed on the rotating shaft 3, and a lower positioning surface 17 fixed with the rotating shaft 3, the rotating shaft 3 is inserted into the shaft sleeve 15, two ends of the shaft sleeve 15 respectively abut against the upper positioning sleeve 16 and the lower positioning surface 17, the connecting seat 4 is fixedly connected with the shaft sleeve 15, and the rotating shaft 3 can smoothly rotate in the shaft sleeve 15 without being affected; meanwhile, the shaft rod sleeve 15 is fixedly connected with the upper and lower driving connecting pieces 51 in the upper and lower driving mechanism 5, the shaft rod sleeve 15, the upper positioning sleeve 16 and the lower positioning surface 17 form a second axial fixing structure together, therefore, when the thread take-up mechanism 20 drives the upper and lower driving connecting pieces 51 to move up and down through the upper and lower driving connecting rods 52, the upper and lower driving connecting pieces 51 drive the shaft rod sleeve 15 to synchronously move up and down, and then the rotating shaft rod 3 is driven to synchronously move up and down through the abutting action of the shaft rod sleeve 15 on the upper positioning sleeve 16 and the lower positioning surface 17, and the shaft rod sleeve 15 simultaneously drives the connecting seat 4 to synchronously move up and down. Wherein, lower locating surface 17 can be established on rotatory axostylus axostyle 3 to can be for moving the up end of the fixed spare part of rotatory axostylus axostyle 3, in this embodiment, refer to fig. 8 to 10, first driving gear 61 is fixed at rotatory axostylus axostyle 3 lower extreme, and utilizes jump ring 18 chucking, and the up end of first driven gear 62 supports and leans on at rotatory axostylus axostyle 3 lower extreme, constitutes lower locating surface 17. In this embodiment, the lower end of the shaft sleeve 15 is inserted into the connecting tube 43 of the connecting seat 4, and the shaft sleeve 15 is connected with the connecting seat 4 stably through the bolt fixed connection.

In the upper machine head device of the embodiment, the shaft rod sleeve 15, the upper positioning sleeve 16 and the lower positioning surface 17 simultaneously form a first axial fixing structure and a second axial fixing structure, and the upper and lower driving connecting piece 51, the rotating shaft rod 3 and the connecting seat 4 form a synchronous up-and-down movement whole, so that the machine needle seat 2 and the machine needle 1 are driven to move up and down, and the sewing work is realized. In the upper head device of this embodiment, in the actual design process, the shaft sleeve 15 may use a hollow needle rod component in the existing design, and then a solid shaft is added as the rotating shaft 3, so that the change to the existing design can be reduced.

Therefore, the upper machine head device provided by the invention realizes synchronous rotation of the upper thread 19 along with the machine needle 1, meets the requirement of improving the sewing stitch, enables the threading of the upper thread 19 to be convenient, enables the upper thread 19 not to be wound with the machine needle 1 or the rotating shaft rod 3, is simple to thread, is used on a high-end sewing machine needing perfect stitches, and improves the sewing quality.

In conclusion, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a can realize that facial line is along with last aircraft nose device of eedle synchronous revolution, includes eedle (1), its characterized in that: the automatic sewing machine is characterized by further comprising a rotating shaft rod (3), a connecting seat (4), a machine needle seat (2) rotatably arranged on the connecting seat (4), a first transmission assembly (6) for connecting the rotating shaft rod (3) and the machine needle seat (2), a first axial fixing structure for connecting the rotating shaft rod (3) and the connecting seat (4), a rotating driving mechanism (7) for driving the rotating shaft rod (3) to rotate, and an upper and lower driving mechanism (5), wherein the rotating shaft rod (3) is axially fixed with the connecting seat (4) through the first axial fixing structure, the rotating shaft rod (3) is parallel to the machine needle seat (2) in a staggered arrangement and drives the machine needle seat (2) to rotate through the first transmission assembly (6), the machine needle (1) is fixed on the machine needle seat (2) and is positioned on a rotating axis of the machine needle seat (2), a line passing through hole (21) extending along the axial direction is formed in the machine needle seat (2), the up-and-down driving mechanism (5) drives the rotating shaft lever (3) to move up and down.

2. The upper head apparatus according to claim 1, wherein: the device is characterized by further comprising a second axial fixing structure for connecting the upper and lower driving mechanisms (5) and the rotating shaft rod (3), wherein the upper and lower driving mechanisms (5) are axially fixed with the rotating shaft rod (3) through the second axial fixing structure and drive the rotating shaft rod (3) to move up and down.

3. The upper head apparatus according to claim 2, wherein: the upper and lower driving mechanism (5) comprises an upper and lower driving connecting piece (51) which moves up and down, the second axial fixing structure comprises a first retaining ring (8) and a second retaining ring (9) which are fixed on the rotating shaft rod (3), and the upper and lower driving connecting piece (51) is clamped between the first retaining ring (8) and the second retaining ring (9) and is abutted against the first retaining ring (8) and the second retaining ring (9).

4. The upper head apparatus according to claim 3, wherein: the up-and-down driving mechanism (5) further comprises an up-and-down driving connecting rod (52) with one end hinged with the up-and-down driving connecting piece (51), and the other end of the up-and-down driving connecting rod (52) is hinged with the thread take-up mechanism (20).

5. The upper head apparatus according to claim 1, wherein: the first transmission assembly (6) comprises a first driving gear (61) coaxially fixed on the rotating shaft rod (3) and a first driven gear (62) coaxially fixed with the machine needle seat (2), and the first driving gear (61) is in meshing transmission with the first driven gear (62).

6. The upper head apparatus according to claim 1, wherein: the rotation driving mechanism (7) comprises a motor (71) and a second transmission assembly connected with an output shaft of the motor (71) and the rotating shaft rod (3), the output shaft of the motor (71) drives the rotating shaft rod (3) to rotate through the second transmission assembly when rotating, and the rotating shaft rod (3) can move relative to the second transmission assembly along the axial direction of the rotating shaft rod.

7. The upper head apparatus of claim 6, wherein: the second transmission assembly comprises a second driving gear (72) fixed on an output shaft of the motor (71) and a second driven gear (73) which is coaxial with the rotating shaft rod (3) and fixed in the circumferential direction, the rotating shaft rod (3) can move in the second driven gear (73) relatively, and the second driving gear (72) is in meshing transmission with the second driven gear (73).

8. The upper head apparatus according to claim 1, wherein: the first axial fixing structure comprises a second retaining ring (9) and a third retaining ring (10) which are fixed on the rotating shaft rod (3), and the connecting seat (4) is installed between the second retaining ring (9) and the third retaining ring (10) and is abutted against the second retaining ring (9) and the third retaining ring (10).

9. The upper head apparatus according to claim 1, wherein: the first axial fixing structure comprises a shaft lever sleeve (15), an upper positioning sleeve (16) fixed on the rotating shaft lever (3) and a lower positioning surface (17) fixed with the rotating shaft lever (3), the rotating shaft lever (3) penetrates through the shaft lever sleeve (15), two ends of the shaft lever sleeve (15) are respectively abutted against the upper positioning sleeve (16) and the lower positioning surface (17), and the connecting seat (4) is fixedly connected with the shaft lever sleeve (15).

10. The upper head apparatus of claim 9, wherein: the shaft lever sleeve (15) is fixedly connected with the upper and lower driving mechanisms (5), and the shaft lever sleeve (15), the upper positioning sleeve (16) and the lower positioning surface (17) form a second axial fixing structure together.