CN117166156A - Embroidery machine head structure - Google Patents

Abstract

The invention belongs to the field of embroidery machines, and particularly relates to an embroidery machine head structure, which solves the problem that the lifting driving force on a needle bar is not in the axial direction and the needle bar is easy to pull and deviate. The machine head structure of the embroidery machine comprises a machine shell, a needle bar driving shaft, a cam, a guide rod, a needle bar driver, a needle selecting frame and an embroidery needle bar vertically inserted on the needle selecting frame, wherein the needle bar driving shaft drives the needle bar driver to lift through the cam and a multi-connecting rod structure; a needle bar swinging clutch structure is arranged between the needle bar butt joint block and the needle bar driver and is used for driving the needle bar butt joint block to swing so as to realize clutch control by entering and exiting the matching part. The effect of preventing the embroidery needle bar from being broken off can be realized.

Description

Embroidery machine head structure

Technical Field

The invention belongs to the field of embroidery machines, and particularly relates to an embroidery machine head structure.

Background

Along with the progress of science and technology, the automation requirement of the embroidery process is higher and higher, and the computerized embroidery machine becomes the main mechanical equipment of the embroidery industry, and the machine head of the embroidery machine mainly realizes the functions of needle selection and driving.

Patent with publication number CN201610887030.8 discloses an embroidery machine head, including needle bar subassembly, presser foot subassembly and actuating mechanism, actuating mechanism includes vertical guide shaft and slides and set up the epaxial first slider of guide, its characterized in that: the presser foot assembly can be connected with the first sliding block and can synchronously lift.

The prior art realizes lifting drive of the needle bar by driving the needle bar lifting lug fixedly arranged on the embroidery needle bar, the lifting lug is in an extending state, and the driving force applied to the lifting lug is equivalent to that not on the axis of the needle bar, and the method can cause bending or even deflection of the needle bar.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a head structure of an embroidery machine.

The aim of the invention can be achieved by the following technical scheme: the machine head structure of the embroidery machine comprises a machine shell, a needle bar driving shaft, a cam, a guide rod, a needle bar driver, a needle selection frame and an embroidery needle bar, wherein the needle bar driving shaft is rotatably and transversely arranged on the machine shell; the needle bar swinging clutch structure is arranged between the needle bar butt joint block and the needle bar driver and is used for driving the needle bar butt joint block to swing so as to realize clutch control by entering and exiting the matching part.

In the embroidery machine head, a needle bar driver is connected to a guide rod in a sliding way, a needle bar driving shaft drives the needle bar driver to lift through a cam and a multi-connecting-rod structure, the embroidery machine head is characterized in that in the prior art, a needle bar butt joint block is clamped into a matching part to form axial limiting so as to realize the effect of lifting synchronization, the driven position on the embroidery needle bar is positioned on an axial extension line of the embroidery needle bar, namely, lifting driving force is directly applied to a rod body, the direction is in the same direction as the axial direction, and a needle bar swinging clutch structure is used for timely driving the needle bar butt joint block to swing so as to realize that the needle bar butt joint block enters or leaves the matching part and achieve the control effect of clutch.

In the above embroidery machine head structure, the matching part is detachably fixed at the upper end of the embroidery needle bar, the matching part is provided with a needle bar transverse groove, the needle bar transverse groove is positioned on an axial extension line of the embroidery needle bar, and an opening of the needle bar transverse groove faces one side of the needle bar driver;

the needle bar butt joint block comprises a protruding part positioned at the front end, the protruding part can enter the needle bar transverse groove to axially limit, and the shape of the protruding part is matched with that of the needle bar transverse groove.

The matching part is positioned at the upper end of the embroidery needle bar, provides space conditions for arranging the positioning plate in the middle of the embroidery needle bar, and is connected with the matching part in a detachable mode, so that the embroidery needle bar is convenient to disassemble and assemble. The needle bar transverse groove is formed in the matching part, the opening faces the needle bar driver, the needle bar butt joint block of the needle bar driver can enter from two sides of the needle bar transverse groove, the needle bar transverse groove is deep into the matching part and is located in the embroidery needle bar axial extension line, and the contact action position is on the embroidery needle bar axial extension line after the needle bar butt joint block enters. The front end of the needle bar butt joint block is provided with a protruding part, the distance between the upper side and the lower side of the protruding part is matched with the distance between the upper inner wall and the lower inner wall of the needle bar transverse groove, and the protruding part can smoothly enter the needle bar transverse groove to form axial limit between the upper wall and the lower wall.

In the above embroidery machine head structure, the embroidery needle bar is sleeved with the needle bar reset spring which enables the embroidery needle bar to have ascending reset trend, the upper end of the embroidery needle bar is provided with the positioning bar, the positioning bar is fixedly arranged on the needle selecting frame, the upper end of the embroidery needle bar is propped against the lower end of the positioning bar, the matching part is positioned on the same horizontal line and is equal in height with the needle bar butt joint block.

The needle bar reset spring enables the needle bar to have a trend of ascending reset, the embroidery needle bar ascends to lean against the lower end face of the positioning strip, the embroidery needle bar is always located at the same height of the preset needle bar butt joint block, the needle bar reset spring has a positioning effect, and the protrusion part can be conveniently and smoothly swung into the matching part to finish butt joint.

In the above-mentioned embroidery machine head structure, the needle selection frame includes a first positioning plate and a second positioning plate which are transversely arranged, the embroidery needle bar sequentially passes through the positioning holes of the first positioning plate and the second positioning plate, and the first positioning plate and the second positioning plate are respectively positioned at the lower section and the lower middle section of the embroidery needle bar;

the needle selecting frame is also provided with a needle bar vertical guide plate, a plurality of vertical grooves are transversely arranged on the needle bar vertical guide plate, a needle bar positioning column is fixedly arranged on the embroidery needle bar, the needle bar positioning column slides in the vertical grooves, and the width of the vertical grooves is matched with the outer diameter of the needle bar positioning column.

The needle bar vertical guide plate is arranged at the front end of the needle selection frame, a plurality of vertical grooves are formed in the needle bar vertical guide plate, needle bar positioning columns of the embroidery needle bar penetrate through the vertical grooves and can move vertically but are limited transversely, and the embroidery needle bar is positioned on the upper section, the middle section and the lower section by matching with the first positioning plate and the second positioning plate, so that the stability of axial expansion of the embroidery needle bar is further ensured.

In the machine head structure of the embroidery machine, the needle bar swinging clutch structure comprises a clutch driving motor, and the clutch driving motor drives the needle bar butt joint block to rotate through a transmission structure so as to be in clutch fit with the embroidery needle bar.

The swing of needle bar butt joint piece passes through motor assembly drive, realizes the effect that the drive goes up and down to the clutch driving machine through transmission structure transmission on specifically, compares when the needle bar driver that adopts at present mostly goes up and down, on the inclined plane that sets up on it bumps into the electro-magnet subassembly output that stretches out and is guided wobbling scheme, through motor and transmission structure's control scheme, swing angle and swing speed all can carry out accurate control, be convenient for realize overall structure's cooperation.

In the machine head structure of the embroidery machine, a reset torsion spring is arranged between the needle bar butt joint block and the embroidery needle bar.

The reset torsion spring enables the poking rod to always have a reset trend, namely always have a trend of rotating in the opposite direction of the poked direction, and the poking torsion spring is matched with poking of the idler wheel to achieve a bidirectional rotation control effect, so that the requirement of clutch control is met.

In the above-mentioned embroidery machine aircraft nose structure, the transmission structure include swinging member, poking rod and driving medium, poking rod vertical set firmly in the needle bar butt joint piece on, swinging member rotate and connect on the mount pad, the driving medium can dismantle set firmly on clutch driving motor's output shaft, driving medium and swinging member between be equipped with first transmission module, swinging member and wave lever between be equipped with second transmission module.

The poking rod is fixedly arranged on the side part of the needle rod butt joint block and is close to the clutch driving motor, the swinging piece is similar to the three-eye connecting rod, one end of the swinging piece is rotationally connected to the clutch motor mounting seat, the other end of the swinging piece is connected with the transmission piece through the first transmission module, the transmission piece is fixed on the clutch motor output shaft, the first transmission module converts the rotation of the transmission piece into the swing of the swinging piece, the second transmission module is used for transmitting the swing of the swinging piece into the swing of the poking rod, the swing surface of the swinging piece is a vertical surface, and the swing surface of the poking rod is a horizontal surface.

In the embroidery machine head structure, the casing on be equipped with the clutch motor mount pad, the clutch driving motor fixed locate on the clutch motor mount pad, the clutch motor mount pad on fixedly be equipped with the rotation reference column, the rotation reference column be located the rotation route of driving medium and be located clutch driving motor output shaft and keep away from poking rod one side for realize the rotation location of driving medium.

The rotation locating column is set firmly on the rotation route of driving medium, when the driving medium rotates to touch the rotation locating column with predetermineeing the direction of rotation, indicates promptly that the swinging member is in the angle of predetermineeing this moment, has the location effect, simultaneously because the stirring rod has the trend to the swinging member wobbling all the time, the driving medium can support on this locating column this moment, allows separation and reunion driving motor disconnection driving force.

In the above embroidery machine head structure, the first transmission module comprises a sliding bolt and a sliding slot, the sliding slot is arranged on the swinging member, and the sliding bolt passes through the sliding slot to be eccentrically and fixedly arranged on the transmission member; the sliding slotted hole is strip-shaped, and the length direction of the sliding slotted hole is perpendicular to the swinging direction of the swinging piece.

The sliding bolt penetrates through the sliding slot hole to be fixedly arranged on the transmission part, the fixedly arranged connection point is not arranged on the extension line of the output shaft of the clutch driving motor, and the eccentric type clutch driving motor is eccentric, when the transmission part rotates, the displacement of the sliding slot hole in the length direction is converted into the sliding of the sliding bolt in the length direction in the sliding slot hole, and the displacement of the sliding bolt in the width direction is converted into the swinging of the swinging part, so that the transmission effect is good. The length direction of the sliding slot hole is perpendicular to the swinging direction of the swinging piece, so that the rotation of the transmission piece can be converted into the maximum swinging range.

In the above embroidery machine head structure, the second transmission module comprises a roller, the roller is rotationally connected to the swinging end of the swinging member, the radial plane of the roller is parallel to the swinging surface of the roller, the poking rod is located on the swinging path of the roller, and the roller pokes the poking rod to drive the needle rod butt joint block to rotate during swinging, so as to realize clutch fit of the needle rod butt joint block and the matching part.

The roller is rotationally connected to the swinging piece and can swing along with the swinging piece to the poking rod, the roller is vertically arranged, and the lifting of the poking rod is not affected when the roller contacts with the poking rod.

In the above embroidery machine head structure, the toggle rod comprises a vertical arc side surface for being matched with the roller, and the highest end and the lowest end of the toggle rod in the lifting process are respectively kept at the upper side and the lower side of the roller.

The vertical arc side surface ensures that the stirring rod and the roller always keep good contact in the stirring process of the needle bar driver. The toggle rod is always positioned at the side of the roller when lifting, and can be in contact fit with the roller all the time.

In the embroidery machine head structure, the guide rod is further provided with a presser foot driving mechanism, the needle selecting frame is provided with a plurality of presser foot bars in an inserted mode, the presser foot bars are provided with presser foot sleeves, the presser foot sleeves are provided with matching rods extending out of the presser foot driving mechanism, the presser foot driving mechanism can be matched with the matching rods in a butt joint mode to drive the presser foot driving mechanism to lift, a presser foot reset spring is arranged between the presser foot sleeves and the needle selecting frame, and the presser foot reset spring is sleeved on the presser foot bars and is in a compressed state.

The presser foot driving mechanism is used for driving the lifting action of the presser foot bar to realize the function of pressing cloth, the matching bar is fixed on the presser foot bar through the presser foot sleeve, the presser foot driving mechanism is matched with the matching bar in a butt joint mode to realize synchronous lifting, and the presser foot reset spring type presser foot bar has the trend of ascending and resetting.

In the above embroidery machine head structure, the presser foot driving mechanism comprises a presser foot driver and a lifting driving unit, the presser foot driver is sleeved on the guide rod, the presser foot driver comprises a presser foot butt joint groove, the presser foot butt joint groove is transversely arranged on the presser foot driver and faces the matching rod, and the matching rod can transversely enter the presser foot butt joint groove to limit the position in the axial direction.

The presser foot driver is provided with a presser foot butt joint groove, the matching rod can transversely move into the presser foot butt joint groove, the sizes of the matching rod and the pressing rod are matched with each other, the presser foot rod is axially limited in the presser foot butt joint groove, and the effect of synchronous lifting of the presser foot rod and the presser foot driver is achieved.

In the above embroidery machine head structure, the lifting driving unit comprises a presser foot lifting driving motor and a connecting rod assembly, the presser foot lifting driving motor is fixed on the machine shell through a presser foot motor mounting seat, the connecting rod assembly comprises a first connecting rod and a second connecting rod which are rotationally connected, the first connecting rod is fixedly connected to an output shaft of the presser foot lifting driving motor, and the second connecting rod is rotationally connected to the presser foot driver.

The effect of driving the presser foot driver to lift is achieved through the rotation of the presser foot lifting driving motor, the conversion from circumferential force to linear force is achieved through the connecting rod assembly, the presser foot lifting driving motor is achieved through the first connecting rod and the second connecting rod, when the presser foot lifting driving motor rotates, the first connecting rod fixed on the presser foot lifting driving motor synchronously rotates, the horizontal distance between the rotating connecting ends of the first connecting rod and the second connecting rod and the guide rod changes, and the second connecting rod is only capable of vertically moving on the guide rod due to the fact that the other end of the second connecting rod is rotationally connected to the guide rod, the horizontal distance can only be changed by changing the inclination angle of the second connecting rod to balance the effect of lifting the presser foot driving block is achieved, and the structure is simple.

In the above embroidery machine head structure, the presser foot motor mounting seat is further provided with a presser foot motor rotating and positioning rod, the presser foot motor rotating and positioning rod is located on the rotating path of the first connecting rod, and when the first connecting rod rotates to contact with the presser foot motor rotating and positioning rod in a preset rotating direction, the presser foot butt joint groove is just located on the butt joint station.

The presser foot motor rotates the locating lever to be fixed in on the presser foot motor mount pad, can collide this presser foot motor and rotate the locating lever and be blocked when first connecting rod rotates, can indicate this moment first connecting rod rotation angle and be the angle of predetermineeing when contacting this presser foot motor and rotate the locating lever with predetermineeing the direction of rotation, and the presser foot driver is located the preset height promptly this moment, and the butt joint station can be located this preset height on, realizes the effect of location.

In the embroidery machine head structure, the casing is fixedly provided with the presser foot butt joint positioning plate, the presser foot butt joint positioning plate is located above the matching rod, the lower end face of the presser foot butt joint positioning plate comprises an arc face protruding downwards, two ends of the arc face are slightly higher than the initial highest position of the matching rod, and the middle lowest position is lower than the initial highest position of the matching rod.

The two ends of the arc-shaped surface are higher than the matching rods, so that the matching rods can smoothly transversely move to enter the lower part of the presser foot butt joint positioning plate, the middle of the arc-shaped surface is lower than the matching rods, the matching rods are tightly contacted at the middle position of the arc-shaped surface, and the positioning effect on the matching rods is ensured.

In the above embroidery machine head structure, the lowest position of the presser foot butt joint positioning plate is provided with a lower side open yielding port, the presser foot driver is lifted and moved below the yielding port, the presser foot driver enters the yielding port when lifted to the highest position, and the upper inner wall of the presser foot butt joint groove is positioned on the connecting line of the arc surfaces at two sides.

When the presser foot driver is lifted to the highest butt joint station, the presser foot driver enters the abdication port, particularly the upper part of the presser foot butt joint groove enters the abdication port, the upper inner wall of the presser foot butt joint groove is equal to the arc surfaces on the two sides, and the stop lever is ensured to smoothly enter the presser foot butt joint groove through the guiding positioning of the arc surfaces.

In the embroidery machine head structure, the needle selecting frame is provided with the presser foot vertical guide plate, a plurality of vertical grooves are transversely arranged on the presser foot vertical guide plate, the matching rod penetrates through the vertical grooves and abuts against the upper inner wall, and the width of the vertical grooves is matched with that of the matching rod.

The vertical guide plate of the presser foot is provided with a vertical groove, the matching rod is arranged in the vertical groove in a penetrating mode, a positioning effect is applied to the upper section of the presser foot rod, and the stability of axial expansion is guaranteed.

Compared with the prior art, the invention has the following advantages:

1. in the embroidery machine head, a needle bar driver is connected to a guide rod in a sliding way, a needle bar driving shaft drives the needle bar driver to lift through a cam and a multi-connecting-rod structure, the embroidery machine head is characterized in that in the prior art, a needle bar butt joint block is clamped into a matching part to form axial limiting so as to realize the effect of lifting synchronization, the driven position on the embroidery needle bar is positioned on an axial extension line of the embroidery needle bar, namely, lifting driving force is directly applied to a rod body, the direction is in the same direction as the axial direction, and a needle bar swinging clutch structure is used for timely driving the needle bar butt joint block to swing so as to realize that the needle bar butt joint block enters or leaves the matching part and achieve the control effect of clutch.

2. The matching part is positioned at the upper end of the embroidery needle bar, provides space conditions for arranging the positioning plate in the middle of the embroidery needle bar, and is connected with the matching part in a detachable mode, so that the embroidery needle bar is convenient to disassemble and assemble. The needle bar transverse groove is formed in the matching part, the opening faces the needle bar driver, the needle bar butt joint block of the needle bar driver can enter from two sides of the needle bar transverse groove, the needle bar transverse groove is deep into the matching part and is located in the embroidery needle bar axial extension line, and the contact action position is on the embroidery needle bar axial extension line after the needle bar butt joint block enters. The front end of the needle bar butt joint block is provided with a protruding part, the distance between the upper side and the lower side of the protruding part is matched with the distance between the upper inner wall and the lower inner wall of the needle bar transverse groove, and the protruding part can smoothly enter the needle bar transverse groove to form axial limit between the upper wall and the lower wall.

3. The needle bar reset spring enables the needle bar to have a trend of ascending reset, the embroidery needle bar ascends to lean against the lower end face of the positioning strip, the embroidery needle bar is always located at the same height of the preset needle bar butt joint block, the needle bar reset spring has a positioning effect, and the protrusion part can be conveniently and smoothly swung into the matching part to finish butt joint.

4. The needle bar vertical guide plate is arranged at the front end of the needle selection frame, a plurality of vertical grooves are formed in the needle bar vertical guide plate, needle bar positioning columns of the embroidery needle bar penetrate through the vertical grooves and can move vertically but are limited transversely, and the embroidery needle bar is positioned on the upper section, the middle section and the lower section by matching with the first positioning plate and the second positioning plate, so that the stability of axial expansion of the embroidery needle bar is further ensured.

5. The rotation locating column is set firmly on the rotation route of driving medium, when the driving medium rotates to touch the rotation locating column with predetermineeing the direction of rotation, indicates promptly that the swinging member is in the angle of predetermineeing this moment, has the location effect, simultaneously because the stirring rod has the trend to the swinging member wobbling all the time, the driving medium can support on this locating column this moment, allows separation and reunion driving motor disconnection driving force.

6. The roller is rotationally connected to the swinging piece and can swing along with the swinging piece to the poking rod, the roller is vertically arranged, and the lifting of the poking rod is not affected when the roller contacts with the poking rod.

7. The vertical arc side surface ensures that the stirring rod and the roller always keep good contact in the stirring process of the needle bar driver. The toggle rod is always positioned at the side of the roller when lifting, and can be in contact fit with the roller all the time.

8. The presser foot motor rotates the locating lever to be fixed in on the presser foot motor mount pad, can collide this presser foot motor and rotate the locating lever and be blocked when first connecting rod rotates, can indicate this moment first connecting rod rotation angle and be the angle of predetermineeing when contacting this presser foot motor and rotate the locating lever with predetermineeing the direction of rotation, and the presser foot driver is located the preset height promptly this moment, and the butt joint station can be located this preset height on, realizes the effect of location.

9. The two ends of the arc-shaped surface are higher than the matching rods, so that the matching rods can smoothly transversely move to enter the lower part of the presser foot butt joint positioning plate, the middle of the arc-shaped surface is lower than the matching rods, the matching rods are tightly contacted at the middle position of the arc-shaped surface, and the positioning effect on the matching rods is ensured.

10. When the presser foot driver is lifted to the highest butt joint station, the presser foot driver enters the abdication port, particularly the upper part of the presser foot butt joint groove enters the abdication port, the upper inner wall of the presser foot butt joint groove is equal to the arc surfaces on the two sides, and the stop lever is ensured to smoothly enter the presser foot butt joint groove through the guiding positioning of the arc surfaces.

Drawings

FIG. 1 is a schematic rear view of an overall structure provided by the present invention;

FIG. 2 is a schematic front view of the overall structure provided by the present invention;

FIG. 3 is a schematic view of the structure of the interior of the housing provided by the present invention;

FIG. 4 is a schematic illustration of the needle bar driver according to the present invention mated with an embroidery needle bar;

FIG. 5 is a schematic view of the needle bar butt block and the mating part of the present invention;

FIG. 6 is a schematic view of the needle bar driver in cooperation with an embroidery needle bar provided by the present invention;

FIG. 7 is a schematic view of the structure of the needle bar swing clutch structure provided by the invention;

FIG. 8 is a schematic illustration of the connection between the needle bar interface block and the needle bar driver provided by the present invention;

FIG. 9 is a schematic diagram of the connection of the driving member and the swinging member provided by the present invention;

fig. 10 is a schematic view of the overall structure of the presser foot driving mechanism provided by the present invention;

FIG. 11 is a schematic view of the engagement of the presser foot docking positioning structure with the presser foot bar provided by the present invention;

fig. 12 is a schematic structural diagram of a lifting driving unit provided by the present invention.

In the drawing, a machine shell 1, a guide rod 2, an embroidery needle bar 3, a needle selecting frame 4, a cam 5, a multi-link structure 6, a needle bar swinging clutch structure 7, a needle bar driver 10, a needle bar driving mechanism 11, a needle bar butting block 12, a matching part 13, a needle bar transverse groove 14, a protruding part 15, an easy-to-enter chamfer 16, a positioning bar 17, a first positioning plate 18, a second positioning plate 19, a needle bar vertical guide plate 20, a needle bar reset spring 21, a needle bar positioning column 22, a clutch driving motor 30, a transmission structure 31, a clutch motor mounting seat 32, a swinging member 33, a poking rod 34, a transmission member 35, a first transmission module 36, a sliding bolt 37, a sliding slot 38, a bolt 39, a bolt head 40, a second transmission module 41, a rotating positioning column 42, a roller 43, a vertical arc side 44, a reset torsion spring 45, a presser foot assembly 60, a presser driving mechanism 61, a presser foot bar 62, a presser foot 63, a presser foot positioning plate 64, a presser foot sleeve 65, a matching rod 66, a reset spring 67, a driver 68, a lifting driving unit 69, a butting motor 70, a lifting motor 71, a presser foot assembly 71, a first presser foot 72, a presser bar 73, a guide plate 73, an arc positioning plate 77, an arc positioning seat 76, a connecting rod positioning plate 77, a butting seat 77, a connecting rod driving mechanism and a connecting rod positioning mechanism 77.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

1-12, the embroidery machine head structure comprises a machine shell 1, a needle bar driving shaft which is rotatably and transversely arranged on the machine shell 1, a cam 5 which is eccentrically sleeved on the needle bar driving shaft, a guide rod 2 which is vertically and fixedly arranged on the machine shell 1, a needle bar driver 10 which is sleeved on the guide rod 2, a needle selecting frame 4 which is slidably connected on the machine shell 1 and transversely moved, and an embroidery needle bar 3 which is vertically inserted on the needle selecting frame 4, wherein the needle bar driving shaft drives the needle bar driver 10 to lift through the cam 5 and the multi-link structure 6, the needle bar driver 10 is rotatably connected with a needle bar butt joint block 12, the embroidery needle bar 3 is provided with a matching part 13, the needle bar butt joint block 12 can be clamped into the matching part 13 to axially and synchronously lift, and the contact action point of the needle bar butt joint block 12 and the matching part 13 is positioned on the axial extension line of the embroidery needle bar 3; a needle bar swinging clutch structure 7 is arranged between the needle bar butt joint block 12 and the needle bar driver 10 and is used for driving the needle bar butt joint block 12 to swing so as to realize clutch control at the in-out matching part.

Specifically, in the embroidery machine head of the present invention, the needle bar driver 10 is slidingly connected to the guide bar 2, the needle bar driving shaft drives the needle bar driver 10 to lift through the cam 5 and the multi-link structure 6, which is the prior art, the needle bar butt joint block 12 is clamped into the matching part 13 to form an axial limit so as to realize the effect of lifting synchronization, mainly, the driven position of the embroidery needle bar 3 is located on the axial extension line thereof, that is, the lifting driving force is directly applied to the bar body, and the direction is the same as the axial direction, and the needle bar swinging clutch structure 7 is used for timely driving the swinging of the needle bar butt joint block 12 so as to realize the entering or leaving of the needle bar butt joint block 12 from the matching part 13, thereby achieving the control effect of the clutch.

Specifically, a guide rod 2 is vertically arranged on the casing 1, a needle bar driver 10 is slidably connected to the guide rod 2 and driven to move up and down by a needle bar driving mechanism 11, the embroidery needle bars 3 are vertically arranged, a needle bar butt joint block 12 which can form a matched with a matching part 13 of the embroidery needle bars 3 is arranged on the needle bar driver 10, the needle bar butt joint block 12 enters the matching part 13 to form an axial limit, the effect that the needle bar driver 10 moves up and down to drive the embroidery needle bars 3 to move up and down is achieved, and the contact action position of the needle bar butt joint block 12 and the matching part 13 of the embroidery needle bars 3 is located on the axial extension line of the embroidery needle bars 3, namely the acting force of the needle bar butt joint block 12 on the embroidery needle bars 3 coincides with the axial direction of the embroidery needle bars 3. Compared with the arrangement of the transversely extending parts on the embroidery needle bar 3, the scheme directly acts on the axial direction through the scheme of acting force driving parallel to but not overlapped with the embroidery needle bar 3, so that the condition that the embroidery needle bar 3 is pulled to be deviated in the lifting driving process is avoided, and the axial positioning requirement is reduced.

As shown in fig. 4-6, the matching portion 13 is detachably fixed to the upper end of the embroidery needle bar 3, the matching portion 13 is provided with a needle bar transverse groove 14, the needle bar transverse groove 14 is located on an axial extension line of the embroidery needle bar 3, and the needle bar transverse groove 14 is open towards one side of the needle bar driver 10. The needle bar butt joint block 12 comprises a protruding part 15 positioned at the front end, the protruding part 15 can enter the needle bar transverse groove 14 to axially limit, and the shape of the protruding part 15 is matched with that of the needle bar transverse groove 14. The edge of the needle bar transverse groove 14 is provided with an easy-to-enter chamfer 16.

Specifically, the matching part 13 is located at the upper end of the embroidery needle bar 3, provides space conditions for arranging a positioning plate in the middle of the embroidery needle bar 3, and meanwhile, the matching part 13 is detachably connected, so that the assembly and the disassembly are convenient. The needle bar transverse groove 14 is formed in the matching part 13, the opening faces the needle bar driver 10, the needle bar butt joint block 12 of the needle bar driver 10 can enter from two sides of the needle bar transverse groove 14, the needle bar transverse groove 14 is deep into the matching part 13 and is positioned in the axial extension line of the embroidery needle bar 3, after the needle bar butt joint block 12 enters, the contact action position is ensured to be on the axial extension line of the embroidery needle bar 3, the front end of the needle bar butt joint block 12 is provided with the protruding part 15, the upper side interval and the lower side interval of the protruding part 15 are matched with the upper inner wall interval and the lower inner wall interval of the needle bar transverse groove 14, the protruding part 15 can smoothly enter the needle bar transverse groove 14, and the axial limit is formed between the upper wall and the lower wall. The easy entry chamfer 16 facilitates lateral movement of the tab 15 into the shank transverse slot 14.

Preferably, the needle bar butt block 12 is rotatably connected to the needle bar driver 10, and the needle bar butt block 12 is controlled to swing into or out of the mating portion 13 by the swing driving mechanism. The needle bar butt joint block 12 can rotate through the swing driving mechanism to realize clutch control, can synchronously lift in coordination with the embroidery needle bar 3 when rotating into a butt joint station, and can move away for the transverse movement of the embroidery needle bar 3 when rotating out.

As an optimization of this embodiment, the casing 1 is slidably connected with a needle selection frame 4, the embroidery needle bar 3 is inserted on the needle selection frame 4, and the needle selection frame 4 drives the traverse motion through a needle selection driving mechanism, so that the corresponding embroidery needle bar 3 moves to the docking station.

In other words, the needle selecting frame 4 is slidably connected in a horizontal translation manner, the embroidery needle bar 3 is inserted on the needle selecting frame 4, and the needle selecting driving mechanism drives the needle selecting frame 4 to move horizontally, so as to drive the embroidery needle bar 3 to move horizontally, so that the corresponding embroidery needle bar 3 moves to a docking station in front of the needle bar docking block 12, and preparation is made for subsequent docking with the needle bar docking block 12, and the effect of needle selecting is realized. The needle selecting driving mechanism can be a sliding groove sliding rail structure and a screw nut driving structure which are matched with each other, namely, the needle selecting frame 4 is in sliding connection through the sliding groove sliding rail structure, and a screw nut driving structure is further arranged between the needle selecting frame 4 and the sliding groove sliding rail structure for driving.

As shown in fig. 4 and 6, the embroidery needle bar 3 is sleeved with a needle bar reset spring 21 (the needle bar reset spring in the figure is only a schematic of sleeved position) which enables the embroidery needle bar to have an ascending reset trend, the upper end of the embroidery needle bar 3 is provided with a positioning bar 17, the positioning bar 17 is fixedly arranged on the needle selection frame 4, the upper end of the embroidery needle bar 3 abuts against the lower end of the positioning bar 17, and the matching part 13 is positioned on the same horizontal line and is equal to the needle bar butt joint block 12.

Specifically, the needle bar reset spring 21 makes the needle bar have a trend of ascending and resetting, the embroidery needle bar 3 ascends to lean against the lower end face of the positioning strip 17, so that the embroidery needle bar 3 is always located at the same height as the preset needle bar butt joint block 12, and the needle bar reset spring has a positioning effect, and is convenient for the protruding portion 15 to smoothly swing into the matching portion 13 to finish butt joint.

As an optimization, the needle selection frame 4 comprises a first positioning plate 18 and a second positioning plate 19 which are transversely arranged, the embroidery needle bar 3 sequentially passes through positioning holes of the first positioning plate 18 and the second positioning plate 19, and the first positioning plate 18 and the second positioning plate 19 are respectively positioned at the lower section and the middle section of the embroidery needle bar 3. The first positioning plate 18 and the second positioning plate 19 are transversely arranged, the embroidery needle bar 3 is sequentially inserted into the positioning holes of the two positioning plates, the effects of limiting and positioning are achieved, the embroidery needle bar 3 is limited to only axially stretch and retract, in addition, the first positioning plate 18 and the second positioning plate 19 are located on the lower section and the middle section, and interference influence with the matching part 13 at the upper end is avoided.

As an optimization, the needle bar vertical guide plate 20 is fixedly arranged on the needle selection frame 4, a plurality of vertical grooves are transversely arranged on the needle bar vertical guide plate 20, the needle bar positioning column 22 is fixedly arranged on the embroidery needle bar 3, the needle bar positioning column 22 slides in the vertical grooves, and the width of the vertical grooves is matched with the outer diameter of the needle bar positioning column 22.

In other words, the front end of the needle selection frame 4 is provided with a needle bar vertical guide plate 20, a plurality of vertical grooves are formed in the needle bar vertical guide plate, and a needle bar positioning column 22 of the embroidery needle bar 3 is arranged in the vertical grooves in a penetrating manner and can move vertically but is limited transversely, and the embroidery needle bar 3 is positioned on the upper section, the middle section and the lower section by matching with the first positioning plate 18 and the second positioning plate 19, so that the stability of axial expansion and contraction of the embroidery needle bar 3 is further ensured.

As shown in fig. 7-9, in the needle bar swinging clutch structure 7, a clutch driving motor 30 is arranged on the casing 1, and the clutch driving motor 30 drives the needle bar butt joint block 12 to rotate through a transmission structure 31 so as to be in clutch fit with the embroidery needle bar 3.

Specifically, be provided with guide arm 2 on casing 1, needle bar driver 10 cover is located on guide arm 2 and is driven by needle bar actuating mechanism 11 and goes up and down, be connected with the needle bar butt joint piece 12 that can dock with the cooperation portion 13 of embroidery needle bar 3 on the needle bar driver 10 rotation, can drive the synchronous lift action of embroidery needle bar 3 after needle bar butt joint piece 12 docks with cooperation portion 13, in addition, the swing of needle bar butt joint piece 12 passes through the motor assembly drive, concretely, realize the effect of drive lift by clutch driving motor 30 through transmission structure 31 transmission to clutch driving machine on, compared with the scheme that the current mostly adopted is gone up and down at needle bar driver 10, on the inclined plane that sets up on it bumps into the electro-magnet subassembly output that stretches out and is led the swing, through motor and transmission structure 31's control scheme, swing angle and swing speed all can carry out accurate control, be convenient for realize overall structure's cooperation.

As shown in fig. 7, the casing 1 is provided with a clutch motor mount 32, and the clutch driving motor 30 is fixedly disposed on the clutch motor mount 32. The transmission structure 31 comprises a swinging member 33, a poking rod 34 and a transmission member 35, wherein the poking rod 34 is vertically and fixedly arranged on the needle rod butt joint block 12, the swinging member 33 is rotationally connected to the clutch motor mounting seat 32, the transmission member 35 is detachably and fixedly arranged on an output shaft of the clutch driving motor 30, a first transmission module 36 is arranged between the transmission member 35 and the swinging member 33, and a second transmission module 41 is arranged between the swinging member 33 and the poking rod 34. The clutch motor mounting seat 32 is fixedly provided with a rotation positioning column 42, and the rotation positioning column 42 is positioned on the rotation path of the transmission member 35 and positioned on one side of the output shaft of the clutch driving motor 30 far away from the toggle rod 34 and is used for realizing the rotation positioning of the transmission member 35. The first transmission module 36 includes a sliding bolt 37 and a sliding slot 38, the sliding slot 38 is opened on the swinging member 33, and the sliding bolt 37 passes through the sliding slot 38 and is eccentrically fixed on the transmission member 35. The sliding slot 38 is bar-shaped, and its length direction is perpendicular to the swinging direction of the swinging member 33. The second transmission module 41 includes a roller 43, the roller 43 is rotatably connected to the swinging end of the swinging member 33, the radial plane of the roller 43 is parallel to the swinging surface thereof, the toggle rod 34 is located on the swinging path of the roller 43, and when the roller 43 swings, the toggle rod 34 is toggled to drive the needle rod butt joint block 12 to rotate, so as to realize clutch cooperation between the needle rod butt joint block 12 and the cooperation portion 13.

Specifically, the clutch driving motor 30 is fixed to the casing 1 by a clutch motor mount 32. The toggle rod 34 is fixedly arranged on the side part of the needle rod butt joint block 12 and is close to the clutch driving motor 30, the swinging piece 33 is similar to a three-eye connecting rod, one end of the swinging piece 33 is rotationally connected to the clutch motor mounting seat 32, the other end of the swinging piece is connected with the transmission piece 35 through the first transmission module 36, the transmission piece 35 is fixed on the clutch motor output shaft, the first transmission module 36 converts the rotation of the transmission piece 35 into the swinging of the swinging piece 33, the second transmission module 41 is used for transmitting the swinging of the swinging piece 33 into the swinging of the toggle rod 34, the swinging surface of the swinging piece 33 is a vertical surface, and the swinging surface of the toggle rod 34 is a horizontal surface. The rotation positioning column 42 is fixedly arranged on the rotation path of the transmission member 35, when the transmission member 35 rotates in a preset rotation direction until the transmission member 35 contacts the rotation positioning column 42, the swing member 33 is at a preset angle, and the positioning effect is achieved. The sliding bolt 37 passes through the sliding slot hole 38 to be fixedly arranged on the transmission member 35, and the fixedly arranged connection point is not arranged on the extension line of the output shaft of the clutch driving motor 30, so that the eccentric type clutch driving motor has good transmission effect, when the transmission member 35 rotates, the displacement of the sliding slot hole 38 in the length direction is converted into the sliding of the sliding bolt 37 in the sliding slot hole 38 in the length direction, and the displacement of the sliding bolt 37 in the width direction is converted into the swinging of the swinging member 33. The length direction of the sliding slot 38 is perpendicular to the swinging direction of the swinging member 33, so that the rotation of the transmission member 35 can be converted to obtain the maximum swinging range. The roller 43 is rotatably connected to the swinging member 33 and can swing along with the swinging member 33 to the toggle rod 34, and the roller 43 is vertically arranged, so that the lifting of the toggle rod 34 is not affected when the roller 43 contacts with the toggle rod 34.

As an optimization, the sliding bolt 37 comprises a bolt rod 39 and a bolt head 40, the bolt rod 39 is arranged in the sliding slotted hole 38 in a penetrating mode, one end of the bolt rod 39 is detachably fixed on the transmission piece 35, the bolt head 40 is fixed at the other end of the bolt rod, the bolt head 40 is round, and the outer diameter of the bolt head is larger than the width of the sliding slotted hole 38.

In other words, the bolt 39 is detachably fixed, so that the bolt head 40 is larger than the sliding slot 38 in size, and has a limiting and anti-falling effect.

Preferably, the tap lever 34 includes a vertical arcuate side 44 for engagement with the roller 43, and the highest and lowest ends of the tap lever 34 during lifting are maintained on the upper and lower sides of the roller 43, respectively. The vertical arcuate sides 44 ensure that good contact is maintained between the tap lever 34 and the roller 43 throughout the tap lever actuator 10 during the tap process. The toggle rod 34 is always located at the side of the roller 43 when lifting, i.e. can be in contact fit with the roller 43 all the time.

As shown in fig. 8, a reset torsion spring 45 is provided between the needle bar butt joint block 12 and the needle bar driver 10, one end of the reset torsion spring 45 is fixed on the needle bar butt joint block 12, the other end is fixed on the needle bar driver 10, and the reset torsion spring 45 causes the toggle rod 34 to have a tendency to approach the roller 43.

Specifically, the reset torsion spring 45 makes the toggle rod 34 always have a reset trend, that is, always have a trend of rotating in the opposite direction to the toggled direction, and cooperates with the toggling of the roller 43 to realize a bidirectional rotation control effect, thereby meeting the requirement of clutch control.

As shown in fig. 10 and 11, the front end of the casing 1 is provided with a needle selecting frame 4 capable of moving transversely, a plurality of presser foot assemblies 60 are transversely and uniformly arranged on the needle selecting frame 4, a presser foot driving mechanism 61 for driving the presser foot assemblies 60 to move up and down is arranged on the guide rod 2, and a presser foot butt joint positioning structure 77 for controlling the presser foot assemblies 60 to be positioned at a preset butt joint height is arranged between the presser foot driving mechanism 61 and the presser foot assemblies 60.

Specifically, the presser foot assembly 60 is disposed on the needle selecting frame 4, the needle selecting frame 4 is slidably connected to the front end of the casing 1, and the needle selecting frame 4 moves laterally to enable the corresponding presser foot assembly 60 to move to the presser foot docking station in front of the presser foot driving mechanism 61, so as to achieve a similar needle selecting effect, and the presser foot docking positioning structure 77 is used for enabling the presser foot assembly 60 to be at a preset height after entering the presser foot docking station, so that the presser foot assembly is convenient to be in smooth docking fit with the presser foot driving mechanism 61.

As shown in fig. 10 and 11, the presser foot assembly 60 includes a presser foot bar 62 and a presser foot 63, the needle selection frame 4 includes a laterally disposed presser foot positioning plate 64, the presser foot bar 62 is inserted into the presser foot positioning plate 64, the presser foot 63 is fixed to the lower end of the presser foot bar 62, a presser foot cover 65 is provided on the presser foot bar 62, and a fitting bar 66 extending toward the presser foot driving mechanism 61 is provided on the presser foot cover 65. The presser foot cover 65 is positioned above the presser foot positioning plate 64, a presser foot return spring 67 is arranged between the presser foot cover 65 and the presser foot positioning plate 64, and the presser foot return spring 67 is sleeved on the presser foot bar 62 and is in a compressed state.

Specifically, the lower end of the presser bar 62 is fixed with a presser foot 63 for specific pressing, the presser bar 62 is inserted into the presser foot positioning plate 64 to achieve the effect of telescopic limit, the presser bar 62 is provided with a presser foot cover 65, and a fitting bar 66 of the presser foot cover 65 extends toward the presser foot driving mechanism 61 for specific butt fit with the presser foot driving mechanism 61. The presser foot return spring 67 is disposed between the presser foot positioning plate 64 and the presser foot cover 65, and in a compressed state, urges the presser foot cover 65 to move upward, so that the presser foot bar 62 has a tendency to move upward for return.

Wherein the presser foot positioning plate 64 and the first positioning plate 18 are integrally formed, which corresponds to the same block.

As shown in fig. 10 and 12, the presser foot driving mechanism 61 includes a presser foot driver 68 and a lift driving unit 69, the presser foot driver 68 is fitted over the guide bar 2, and the lift driving unit 69 is connected to the presser foot driver 68 for driving up-and-down reciprocation thereof. The presser foot driver 68 comprises a presser foot butting groove 70, the presser foot butting groove 70 is transversely formed in the presser foot driver 68 and faces the matching rod 66, the distance between the upper inner wall and the lower inner wall of the presser foot butting groove 70 is matched with the outer diameter of the matching rod 66, and the matching rod 66 can transversely enter the presser foot butting groove 70 to axially limit. The lifting drive unit 69 includes a presser foot lifting drive motor 71 and a link assembly 72, the presser foot lifting drive motor 71 is fixed on the casing 1 through a presser foot motor mounting seat 75, the link assembly 72 includes a first link 73 and a second link 74 which are rotatably connected, the first link 73 is fixedly connected to an output shaft of the presser foot lifting drive motor 71, and the second link 74 is rotatably connected to the presser foot driver 68.

Specifically, the presser foot driver 68 is fitted over the guide bar 2 so as to be axially slidable, and the lift driving unit 69 drives the presser foot driver 68 to move up and down. The presser foot driver 68 is provided with a presser foot butting groove 70, the matching rod 66 can transversely move into the presser foot butting groove 70, the size of the matching rod and the size of the matching rod are mutually matched, the presser foot rod 62 is axially limited in the presser foot butting groove 70, and the effect of synchronous lifting of the presser foot rod 62 and the presser foot driver 68 is achieved. The effect of driving the presser foot driver 68 to lift is achieved through the rotation of the presser foot lifting driving motor 71, the conversion from circumferential force to linear force is achieved through the connecting rod assembly 72, the conversion is achieved specifically through the first connecting rod 73 and the second connecting rod 74, when the presser foot lifting driving motor 71 rotates, the first connecting rod 73 fixed on the presser foot lifting driving motor rotates synchronously, the horizontal distance between the rotating connecting ends of the first connecting rod 73 and the second connecting rod 74 and the guide rod 2 changes, and because the other end of the second connecting rod 74 is rotationally connected to the guide rod 2 and can only vertically move on the guide rod 2, the horizontal distance can only be changed by changing the inclination angle of the second connecting rod 74 to balance the horizontal distance, the effect of lifting the presser foot 63 driving block is achieved, and the structure is simple.

As an optimization, the presser foot motor mounting seat 75 is further provided with a presser foot motor rotating and positioning rod 76, the presser foot motor rotating and positioning rod 76 is located on the rotating path of the first connecting rod 73, and when the first connecting rod 73 rotates in a preset rotating direction to contact with the presser foot motor rotating and positioning rod 76, the presser foot docking groove 70 is just located on the docking station.

In other words, the presser foot motor rotating and positioning rod 76 is fixed on the presser foot motor mounting seat 75, the first connecting rod 73 collides with the presser foot motor rotating and positioning rod 76 to be blocked when rotating, and when contacting with the presser foot motor rotating and positioning rod 76 in a preset rotating direction, the rotating angle of the first connecting rod 73 can be indicated to be a preset angle, namely, the presser foot driver 68 is located at a preset height, and the docking station can be located at the preset height, so that the positioning effect is realized.

As shown in fig. 11, the presser foot docking positioning structure 77 includes a presser foot docking positioning plate 78, the presser foot docking positioning structure 77 is fixed on the casing 1, the presser foot docking positioning plate 78 is located above the mating lever 66, the lower end surface of the presser foot docking positioning plate 78 includes an arc surface 79 protruding downward, two ends of the arc surface 79 are slightly higher than the initial highest position of the mating lever 66, and the middle lowest position is lower than the initial highest position of the mating lever 66. The lowest position of the presser foot butt joint positioning plate 78 is provided with a lower side open yielding port 80, the presser foot driver 68 moves up and down below the yielding port 80, the presser foot driver 68 enters the yielding port 80 when rising to the highest position, and the upper inner wall of the presser foot butt joint groove 70 is positioned on the connecting lines of the arc surfaces 79 on the two sides.

Specifically, the two ends of the arc-shaped surface 79 are higher than the matching rod 66, so that the matching rod 66 can smoothly transversely move under the presser foot butt-joint positioning plate 78, the middle of the arc-shaped surface 79 is lower than the matching rod 66, the matching rod 66 is ensured to be in close contact with the middle of the arc-shaped surface 79, and the positioning effect on the matching rod 66 is ensured. When the presser foot driver 68 is lifted to the highest docking station, the presser foot driver enters the yielding port 80, particularly the upper part of the presser foot docking groove 70 enters the yielding port 80, the upper inner wall of the presser foot docking groove 70 is equal to the arc surfaces 79 on the two sides, and the stop lever is ensured to smoothly enter the presser foot docking groove 70 through the guiding positioning of the arc surfaces 79.

As an optimization, the needle selecting frame 4 is provided with a presser foot vertical guide plate 81, a plurality of vertical grooves are transversely arranged on the presser foot vertical guide plate 81, the matching rods 66 are arranged in the vertical grooves in a penetrating mode and are abutted against the inner wall of the upper side, and the width of the vertical grooves is matched with that of the matching rods 66. The vertical guide plate 81 of the presser foot is provided with a vertical groove, the matching rod 66 is arranged in the vertical groove in a penetrating mode, a positioning effect is exerted on the upper section of the presser foot rod 62, and the stability of axial expansion is guaranteed.

The specific working principle is as follows: when the lifting butt joint is not performed, the needle bar butt joint block 12 is positioned at the swinging-out position, the needle selecting driving mechanism drives the needle selecting frame 4 to transversely move, the embroidery needle bar 3 needing to stretch out and draw back is moved to the front of the needle bar driver 10, then the needle bar butt joint block 12 swings, the protruding part 15 enters the matching part 13, the needle bar driving mechanism 11 drives the needle bar driver 10 to lift, and the needle bar driver 10 drives the embroidery needle bar 3 to lift.

The needle bar driving block moves up and down to reciprocate on the guide rod 2, when the needle bar driver 10 is in butt joint with the matching part 13, the toggle rod 34 is in contact with the roller 43, and pressure is applied to the roller 43 under the action of the reset torsion spring 45, at the moment, the transmission piece 35 abuts against the rotating positioning column 42, and along with the lifting of the needle bar driver 10, the roller 43 rolls on the toggle rod 34. When the butt joint is required to be released, the clutch driving motor 30 rotates, the swinging piece 33 swings to the poking rod 34, the poking rod 34 rotates to drive the connected needle bar driver 10 to rotate, and the butt joint of the needle bar driver 10 and the matching part 13 is released.

When the needle selecting frame 4 moves transversely, when the matching rod 66 of the presser foot sleeve 65 enters the lower part of the presser foot butting positioning plate 78, the matching rod 66 starts to be pressed and positioned by the arc surface 79 until entering the yielding port 80, and then enters the presser foot butting groove 70 in a homeotropic manner, a limit is formed in the axial direction, and the presser foot lifting driving motor 71 rotates to drive the presser foot driver 68 to lift, so that the lifting of the presser foot 63 is realized.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides an embroidery machine aircraft nose structure, includes casing (1), needle bar drive shaft, eccentric cover that rotationally transversely locates on casing (1) cam (5) on the needle bar drive shaft, guide arm (2) on casing (1) are set firmly vertically, needle bar driver (10) on guide arm (2) are set to cover, sliding connection is in needle selection frame (4) and embroidery needle bar (3) on needle selection frame (4) that can transversely translate on casing (1), the needle bar drive shaft drive needle bar driver (10) lift action through cam (5) and many connecting rod structure (6), characterized in that, needle bar driver (10) on rotate and be connected with needle bar butt joint piece (12), embroidery needle bar (3) on be equipped with cooperation portion (13), needle bar butt joint piece (12) can block into cooperation portion (13) in the axial spacing synchronous lift, and the contact point of needle bar butt joint piece (12) and cooperation portion (13) are located on the axial extension line of embroidery needle bar (3); a needle bar swinging clutch structure (7) is arranged between the needle bar butt joint block (12) and the needle bar driver (10) and is used for driving the needle bar butt joint block (12) to swing so as to enter and exit the matching part (13) to realize clutch control.

2. The embroidery machine head structure according to claim 1, wherein the matching part (13) is detachably fixed at the upper end of the embroidery needle bar (3), the matching part (13) is provided with a needle bar transverse groove (14), the needle bar transverse groove (14) is positioned on an axial extension line of the embroidery needle bar (3), and the needle bar transverse groove (14) is opened towards one side of the needle bar driver (10);

the needle bar butt joint block (12) comprises a protruding part (15) positioned at the front end, the protruding part (15) can enter the needle bar transverse groove (14) to axially limit, and the shape of the protruding part (15) is matched with that of the needle bar transverse groove (14).

3. The embroidery machine head structure according to claim 2, wherein the embroidery needle bar (3) is sleeved with a needle bar reset spring (21) which enables the embroidery needle bar to have an ascending reset trend, a positioning bar (17) is arranged at the upper end of the embroidery needle bar (3), the positioning bar (17) is fixedly arranged on the needle selection frame (4), the upper end of the embroidery needle bar (3) abuts against the lower end of the positioning bar (17), and the matching part (13) is positioned on the same horizontal line and is equal to the needle bar butt joint block (12).

4. The embroidery machine head structure according to claim 3, wherein the needle selection frame (4) comprises a first positioning plate (18) and a second positioning plate (19) which are transversely arranged, the embroidery needle bar (3) sequentially passes through the positioning holes of the first positioning plate (18) and the second positioning plate (19), and the first positioning plate (18) and the second positioning plate (19) are respectively positioned at the lower section and the lower middle section of the embroidery needle bar (3);

Needle bar vertical guide plates (20) are further arranged on the needle selection frame (4), a plurality of vertical grooves are transversely arranged on the needle bar vertical guide plates (20), needle bar positioning columns (22) are fixedly arranged on the embroidery needle bars (3), the needle bar positioning columns (22) slide in the vertical grooves, and the widths of the vertical grooves are matched with the outer diameters of the needle bar positioning columns (22).

5. The embroidery machine head structure as claimed in any one of claims 1-4, wherein the needle bar swinging clutch structure (7) comprises a clutch driving motor (30) fixed on the casing 1 through a clutch motor mounting seat (32), wherein the clutch driving motor (30) drives the needle bar butt joint block (12) to rotate through a transmission structure (31) to be in clutch fit with the embroidery needle bar (3);

a reset torsion spring (45) is arranged between the needle bar butt joint block (12) and the embroidery needle bar (3);

the transmission structure (31) comprises a swinging member (33), a poking rod (34) and a transmission member (35), the poking rod (34) is vertically and fixedly arranged on the needle bar butt joint block (12), the swinging member (33) is rotationally connected to a mounting seat, the transmission member (35) is detachably and fixedly arranged on an output shaft of the clutch driving motor (30), a first transmission module (36) is arranged between the transmission member (35) and the swinging member (33), and a second transmission module (41) is arranged between the swinging member (33) and the fluctuation rod.

6. The embroidery machine head structure according to claim 5, wherein the casing (1) is provided with a clutch motor mounting seat (32), the clutch driving motor (30) is fixedly arranged on the clutch motor mounting seat (32), the clutch motor mounting seat (32) is fixedly provided with a rotation positioning column (42), the rotation positioning column (42) is positioned on the rotation path of the transmission member (35) and positioned on one side, far away from the toggle rod (34), of the output shaft of the clutch driving motor (30) for realizing rotation positioning of the transmission member (35).

7. The embroidery machine head structure according to claim 5, wherein the first transmission module (36) comprises a sliding bolt (37) and a sliding slot hole (38), the sliding slot hole (38) is opened on the swinging member (33), and the sliding bolt (37) passes through the sliding slot hole (38) to be eccentrically fixed on the transmission member (35); the sliding slotted hole (38) is strip-shaped, and the length direction of the sliding slotted hole is perpendicular to the swinging direction of the swinging piece (33);

the second transmission module (41) comprises a roller (43), the roller (43) is rotationally connected to the swinging end of the swinging piece (33), the radial plane of the roller (43) is parallel to the swinging surface of the roller, the poking rod (34) is positioned on the swinging path of the roller (43), and the poking rod (34) is poked to drive the needle rod butt joint block (12) to rotate when the roller (43) swings, so as to realize the clutch fit of the needle rod butt joint block (12) and the matching part (13);

The toggle rod (34) comprises a vertical arc-shaped side surface (44) which is used for being matched with the roller (43), and the highest end and the lowest end of the toggle rod (34) in the lifting process are respectively kept on the upper side and the lower side of the roller (43).

8. The embroidery machine head structure as claimed in any one of claims 1-4, wherein the guide rod (2) is further provided with a presser foot driving mechanism (61), the needle selecting frame (4) is provided with a plurality of presser foot bars (62) in an inserted manner, the presser foot bars (62) are provided with presser foot sleeves (65), the presser foot sleeves (65) are provided with matching rods (66) extending towards the presser foot driving mechanism (61), the presser foot driving mechanism (61) can be matched with the matching rods (66) in a butt joint manner to drive the presser foot driving mechanism to lift, a presser foot reset spring (67) is arranged between the presser foot sleeves (65) and the needle selecting frame (4), and the presser foot reset spring (67) is sleeved on the presser foot bars (62) and is in a compressed state.

9. The embroidery machine head structure as claimed in claim 8, wherein the presser foot driving mechanism (61) comprises a presser foot driver (68) and a lifting driving unit (69), the presser foot driver (68) is sleeved on the guide rod (2), the presser foot driver (68) comprises a presser foot butt joint groove (70), the presser foot butt joint groove (70) is transversely opened on the presser foot driver (68) and faces the matching rod (66), and the matching rod (66) can transversely enter the presser foot butt joint groove (70) to limit axially;

The lifting driving unit (69) comprises a presser foot lifting driving motor (71) and a connecting rod assembly (72), the presser foot lifting driving motor (71) is fixed on the machine shell (1) through a presser foot motor mounting seat (75), the connecting rod assembly (72) comprises a first connecting rod (73) and a second connecting rod (74) which are rotationally connected, the first connecting rod (73) is fixedly connected to an output shaft of the presser foot lifting driving motor (71), and the second connecting rod (74) is rotationally connected to a presser foot driver (68);

the presser foot motor mounting seat (75) is also provided with a presser foot motor rotating and positioning rod (76), the presser foot motor rotating and positioning rod (76) is positioned on the rotating path of the first connecting rod (73), and when the first connecting rod (73) rotates in a preset rotating direction to contact with the presser foot motor rotating and positioning rod (76), the presser foot butt joint groove (70) is just positioned on the butt joint station.

10. The embroidery machine head structure according to claim 9, wherein the machine shell (1) is fixedly provided with a presser foot butt joint positioning plate (78), the presser foot butt joint positioning plate (78) is positioned above the matching rod (66), the lower end surface of the presser foot butt joint positioning plate (78) comprises an arc surface (79) protruding downwards, two ends of the arc surface (79) are slightly higher than the initial highest position of the matching rod (66), and the middle lowest position is lower than the initial highest position of the matching rod (66);

The lower part of the presser foot butt joint positioning plate (78) is provided with an abdication port (80) with an open lower side, the presser foot driver (68) moves up and down below the abdication port (80), the presser foot driver (68) enters the abdication port (80) when rising to the highest, and the upper inner wall of the presser foot butt joint groove (70) is positioned on the connecting line of the arc surfaces (79) at the two sides;

the needle selecting frame (4) is provided with a presser foot vertical guide plate (81), a plurality of vertical grooves are transversely arranged on the presser foot vertical guide plate (81), the matching rod (66) is arranged in the vertical grooves in a penetrating mode and is abutted to the inner wall of the upper side, and the width of the vertical grooves is matched with that of the matching rod (66).