CN112411044B

CN112411044B - Embroidery machine head

Info

Publication number: CN112411044B
Application number: CN202011106018.1A
Authority: CN
Inventors: 张丁元; 魏大江; 陈信宝; 王亮; 曹万里; 王淡军
Original assignee: Zhuji Maya Electric Appliance Machinery Co ltd
Current assignee: Zhuji Maya Electric Appliance Machinery Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2023-07-14
Anticipated expiration: 2040-10-15
Also published as: CN112411044A

Abstract

The invention belongs to the technical field of embroidery machines, and particularly relates to an embroidery machine head. The invention comprises a machine head shell, wherein a guide rod is vertically and fixedly arranged at the front part of the machine head shell, a presser foot driver and a needle bar driver are axially and movably arranged on the guide rod at intervals, the needle bar driver is connected with a needle bar driving mechanism, and the presser foot driver is connected with the presser foot driving mechanism. According to the invention, through switching the states of connecting and dropping the needle rod and separating from the needle rod when high-speed embroidery is performed, when the needle rod is required to be not dropped any more, the needle rod is separated from the needle rod driver, the high-speed needle rod is prevented from striking the presser foot, mechanical parts are damaged, the needle rod is reconnected, the needle rod is enabled to drop again, only the clutch structure is required to be rotated to the initial position, the needle rod is driven to continue to drop through the needle rod driver, the degree of automation is higher, the connection or disconnection switching of the needle rod is simple and quick, the practicability and the stability are higher, and the loss of the needle rod for dropping the needle rod caused by the failure of the lock motor is reduced.

Description

Embroidery machine head

Technical Field

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

Background

The main motion of the computerized embroidery machine is similar to that of the sewing machine, and the main embroidery motion is divided into the motions of the upper thread and the lower thread. The needle bar moves up and down in a reciprocating mode according to a certain motion rule, the needle bar is connected with a presser foot in the traditional embroidery machine, and the needle bar is driven to move by a needle bar driving mechanism. The needle bar mechanism is an important component in the computerized embroidery machine, and a needle bar driver is generally adopted to drive the needle bar to reciprocate up and down so as to drop the needle, and the prior art generally realizes control through a lock motor. However, if the lock motor fails, the needle bar is dropped, which easily causes the needle bar to strike the presser foot and damage other mechanical parts, the stability and convenience of the lock motor for controlling the needle bar are poor, and the failure rate is high.

In order to overcome the defects in the prior art, people have continuously explored and put forward various solutions, for example, chinese patent discloses a high-speed nose assembly for a computerized embroidery machine [ application number: 201410326776.2, including aircraft nose mechanism, fixture and needle bar frame, the needle bar frame passes through the slide and installs fixture on aircraft nose mechanism, compared with the prior art, the invention not only can prevent that the embroidery line from deviating from the pinhole under the effect of external force, but also can loosen the normal work of embroidery line when starting up, and can stand wear and tear, long service life reduces manufacturing cost, and the transmission is steady, can also different diameters mix embroidery same figure, and does not influence production. However, the stability and convenience of the lock motor control needle bar in the scheme are still poor, the failure rate is high, and the condition that the needle bar impacts the presser foot and damages other mechanical parts is easily caused.

Disclosure of Invention

The object of the present invention is to solve the above problems and to provide an embroidery machine head.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides an embroidery machine aircraft nose, includes the aircraft nose casing, is provided with the guide arm at the vertical fixed of aircraft nose casing front portion, axial interval activity is provided with presser foot driver and needle bar driver on the guide arm, needle bar driver and needle bar actuating mechanism link to each other, the presser foot driver link to each other with presser foot actuating mechanism, the needle bar driver link to each other with the needle bar through clutch structure, presser foot driver and needle bar driver between be equipped with thereby by the presser foot driver provides the linkage clutch control structure of power control clutch structure action, thereby linkage clutch control structure be in the lifting state and needle bar driver be in the lifting state the clutch structure action control thereby make needle bar driver and needle bar break away from each other, and thereby when presser foot driver descends the back clutch structure reset makes needle bar driver and needle bar interconnect.

In the embroidery machine head, the presser foot driving mechanism is an independent driving mechanism arranged on the machine head shell and comprises a presser foot driving motor which is fixed outside the body cavity of the machine head shell and positioned at the back of the machine head shell, a power shaft of the presser foot driving motor penetrates into the machine head shell and is connected with a presser foot driving transmission structure which converts rotary power into vertical reciprocating power, and the presser foot driving transmission structure is connected with the presser foot driver.

In the embroidery machine head, the presser foot driving motor is arranged at one side of the back of the machine head shell; the guide rod is arranged in the middle of the front part of the machine head shell in the transverse direction; the presser foot driving transmission structure penetrates through the cavity of the machine head shell from the rear part of the machine head shell to the transverse middle part of the front part of the machine head shell; the presser foot driving transmission structure comprises a rigid coupling component and a power reversing component, one end of the rigid coupling component is connected with the presser foot driving motor, the other end of the rigid coupling component is connected with the power reversing component, and the power reversing component is connected with the presser foot driver; the side part of the machine head shell is provided with a shaft seat which is integrally arranged with the machine head shell, and the power reversing assembly penetrates through the shaft seat.

In the embroidery machine head, the machine head shell comprises a shell seat with an integrated structure, the shell seat comprises a back plate, an inclined bottom plate is arranged at the lower end of the back plate, a full side plate is arranged on one side of the back plate and the inclined bottom plate, a half side plate is arranged on the other side of the back plate and the inclined bottom plate, a cantilever is arranged above the half side plate, the upper parts of the cantilever and the full side plate are connected with a transversely arranged guide rail seat, an opening is formed between the cantilever and the half side plate, the back plate, the inclined bottom plate, the full side plate, the half side plate, the cantilever and the guide rail seat are connected into a whole, a main shaft mounting hole is formed in the upper part of the full side plate, and the main shaft mounting hole is opposite to the opening; the top of the half side plate is provided with a protruding shaft seat, the shaft seat is provided with a transmission shaft hole which penetrates through the shaft seat from front to back, and the shaft seat is positioned in the middle of the top of the half side plate and is connected with the half side plate into a whole; the opening is provided with a sealing side plate, the sealing side plate comprises at least one spliced side plate, a main shaft through hole is formed in the sealing side plate, and the main shaft through hole is overlapped with the central axis of the main shaft mounting hole; the sealing side plates comprise a plurality of spliced side plates, wherein half holes are respectively arranged on the two spliced side plates, and the two half holes are spliced into the main shaft through hole; one side of the shaft seat, which is close to the back plate, is provided with an installation notch, the other side of the shaft seat is provided with a yielding notch, and a sealing plate is detachably fixed at the installation notch; the power reversing assembly partially penetrates out of the clearance gap during working.

In the embroidery machine head, the needle bar driving mechanism comprises a driving cam fixed on the main shaft, a circular ring sleeve is sleeved on the periphery of the driving cam, a handle is arranged at the outer end of the circular ring sleeve, the handle is hinged with the middle part of the transmission arm, the rear end of the transmission arm is rotationally connected with a cylinder on the fixed machine head shell, the front end of the transmission arm is rotationally connected with one end of the small connecting rod, and the other end of the small connecting rod is rotationally connected with the needle bar driver.

In the embroidery machine head, the needle bar driver is connected with the needle bar through the clutch structure, the needle bar axially movably penetrates through the needle bar frame arranged at the front part of the machine head shell, an axial anti-falling structure is arranged between the needle bar driver and the needle bar, a compression spring is sleeved on the needle bar, one end of the compression spring acts on the needle bar frame, the other end of the compression spring acts on the needle bar, and when the clutch structure is in a state that the needle bar driver is separated from the needle bar, the needle bar is lifted by the compression spring, so that the needle bar is in a position locking state.

In the embroidery machine head, the linkage clutch control structure comprises a transmission mechanism arranged at one side of the guide rod, wherein the power input end of the transmission mechanism is connected with the presser foot driver in a lifting state, and the power output end of the transmission mechanism acts on the needle rod driver to control the clutch structure; the transmission mechanism comprises a transmission piece with the middle part rotatably connected with the machine head shell, the transmission piece is in a shape of a cylinder, a supported part is arranged at the lower end of the transmission piece, a pushing part acting on a needle bar driver is arranged at the upper end of the transmission piece, and a pushing part for lifting the supported part when the presser foot driver is in a lifting state is arranged on the presser foot driver; the pushing part is arranged on the presser foot driver and transversely extends, and the pushing part and the presser foot driver are connected into a whole; the supporting part is fixed at the lower end of the transmission piece through a pin extending transversely, and the supporting part extends forwards; the pushing part is positioned above the supported part, and the vertical projections of the pushing part and the supported part are mutually intersected; the pushing part is cylindrical and transversely extends to the front side of the needle bar driver; the transmission piece is arranged on the machine head shell through a rotating shaft, a return torsion spring is sleeved on the rotating shaft, and the return torsion spring acts on the transmission piece and the machine head shell respectively.

In the above-mentioned embroidery machine aircraft nose, needle bar driver include the lift slide of cover locating the guide arm, lift slide with last be equipped with rather than axial positioning and circumference rotatable coupling's drive clutch spare, drive clutch spare and needle bar between be equipped with can with the separation and reunion structure of needle bar separation after drive clutch spare circumference rotates, lift slide and drive clutch spare between be equipped with thereby can make the drive clutch spare after the circumference rotate reset the circumference rotation reset spring that makes needle bar driver and needle bar link again, drive clutch spare on be equipped with along the presser foot linkage portion of drive clutch spare axial extension, push portion and presser foot linkage portion sliding contact or rolling contact.

In the embroidery machine head, the presser foot linkage part is columnar and arranged at one side of the driving clutch piece, and two ends of the presser foot linkage part respectively exceed the end parts of the driving clutch piece; the other side of drive separation and reunion spare be equipped with motor pushing part, motor pushing part's both ends surpass the tip of drive separation and reunion spare respectively, be equipped with motor pushing mechanism in motor pushing part's outside, motor pushing mechanism including fixing the motor at the aircraft nose casing, the output shaft of motor on be fixed with the swing arm, the swing arm outer end be fixed with the push rod, push rod and motor pushing part sliding contact or rolling contact.

In the embroidery machine head, the pushing part is positioned at the front side of the presser foot linkage part, and the push rod is positioned at the rear side of the motor pushing part; a rotary limiting structure is arranged between the lifting slide seat and the driving clutch piece, the limiting direction of the rotary limiting structure is opposite to the circumferential rotating direction of the driving clutch piece, the rotary limiting structure comprises a limiting body fixed on the lifting slide seat and a limiting surface arranged on the driving clutch piece, the limiting body and the limiting surface are mutually abutted under the action of a circumferential rotary reset spring, and when the limiting body and the limiting surface are mutually abutted, the clutch structure is in a state that a needle rod driver is connected with a needle rod; the push rod comprises a rod body and a rolling body rotatably connected to the outer end of the rod body, and the rolling body is contacted with the motor pushing part; the driving clutch piece is made of plastic; the circumferential rotation reset spring comprises a torsion spring, one foot of the torsion spring is connected with the lifting slide seat, and the other foot of the torsion spring is connected with the driving clutch piece; the clutch structure comprises a bayonet arranged on the driving clutch piece and a clamping head arranged on the needle rod, wherein the bayonet transversely extends and two ends of the bayonet are communicated, and when the driving clutch piece circumferentially rotates, the clamping head can be clamped in or separated from the bayonet.

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

1. according to the invention, through switching the states of connecting and dropping the needle rod and separating from the needle rod when high-speed embroidery is performed, when the needle rod is required to be not dropped any more, the needle rod is separated from the needle rod driver, the high-speed needle rod is prevented from striking the presser foot, mechanical parts are damaged, the needle rod is reconnected, the needle rod is enabled to drop again, only the clutch structure is required to be rotated to the initial position, the needle rod is driven to continue to drop through the needle rod driver, the degree of automation is higher, the connection or disconnection switching of the needle rod is simple and quick, the practicability and the stability are higher, and the loss of the needle rod for dropping the needle rod caused by the failure of the lock motor is reduced.

2. According to the invention, the rigid coupling component and the power reversing component are arranged to connect and drive the presser foot driving motor and the presser foot driving mechanism, and the connecting mode can ensure that the output shaft of the presser foot driving motor does not need to be too long, so that the rigidity of the output shaft of the presser foot driving motor is improved in the working process, the working precision of the presser foot driving mechanism is improved, and meanwhile, the assembly and the disassembly are simpler, the connection is convenient, and the maintenance cost and the difficulty are lower.

3. According to the invention, the installation notch is arranged, so that a worker can conveniently install the fixed shaft seat, an operable space is provided during disassembly and assembly, the yielding notch plays a yielding role, and the space can be utilized more preferably and reasonably.

4. According to the invention, the limiting surface and the limiting body are arranged, when the needle bar clutch structure rotates to the needle bar connecting state, the limiting surface on the driving clutch piece is in abutting fit with the limiting body, so that the driving clutch piece can not excessively rotate in the direction opposite to the circumferential rotation direction of the driving clutch piece, the limiting of the driving clutch piece is realized, and the clutch structure is tightly connected with the needle bar in the connecting state.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a partial structural schematic of the present invention.

Fig. 3 is an exploded view of fig. 2.

Fig. 4 is a schematic view of another aspect of the present invention.

Fig. 5 is a schematic view of a partial structure of another aspect of the present invention.

Fig. 6 is a schematic structural view of the needle bar driver.

Fig. 7 is a schematic view of another aspect of the present invention.

Fig. 8 is a schematic view of a partial structure of another aspect of the present invention.

Fig. 9 is a schematic view of a partial structure of another aspect of the present invention.

Fig. 10 is a schematic view of another aspect of the present invention.

Fig. 11 is a schematic structural view of the needle bar driving mechanism.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-11, an embroidery machine head comprises a machine head shell 35, a guide rod 30 is vertically and fixedly arranged at the front part of the machine head shell 35, a presser foot driver 8 and a needle bar driver 31 are axially and movably arranged on the guide rod 30 at intervals, the needle bar driver 31 is connected with a needle bar driving mechanism 130, the presser foot driver 8 is connected with a presser foot driving mechanism 60a, the needle bar driver 31 is connected with a needle bar 5 through a clutch structure 32, a linkage clutch control structure 33 which is powered by the presser foot driver 8 and controls the clutch structure 32 to act is arranged between the presser foot driver 8 and the needle bar driver 31, the linkage clutch control structure 33 controls the clutch structure 32 to act when the presser foot driver 8 is in a lifting state and the needle bar driver 31 is in a lifting state so as to enable the needle bar driver 31 and the needle bar 5 to be mutually separated, and when the presser foot driver 8 descends, the clutch structure 32 is reset so as to enable the needle bar driver 31 and the needle bar 5 to be mutually connected.

In this embodiment, the presser foot driver 8 and the needle bar driver 31 can do reciprocating rectilinear motion along the axial direction of the guide bar 30, the clutch structure 32 can be driven to do circumferential rotation along the axial direction of the guide bar 30 by the linkage type clutch control structure 33, and then the state switching of connection or disconnection between the needle bar driver 31 and the needle bar 5 is completed by the rotation of the clutch structure 32, when the lock is required to be not operated, the needle bar 5 and the needle bar driver 31 can be disconnected by the linkage type clutch control structure 33, the needle bar 5 is not dropped any more, the high-speed needle bar is prevented from striking the presser foot, mechanical parts are damaged, the needle bar 5 is reconnected and the needle bar 5 is allowed to drop again, only the clutch structure 32 is required to be rotated to an initial position, the needle bar 5 is driven to continue to drop by the needle bar driver 31, the needle bar driving mechanism 130 is used for driving the needle bar driver 31 to move, the presser foot driving mechanism 60a is used for driving the presser foot driver 8 to move, the degree of automation is higher, and the connection or disconnection switching is simple and quick, and the practicability and stability are stronger;

Namely, the electric control of the lock motor and the mechanical control of the linkage clutch control structure 33 taking the presser foot driver 8 as power can realize the clutch control of the needle bar driver 31 and the needle bar 5, thereby further improving the control stability and the use flexibility.

As shown in fig. 1-11, the presser foot driving mechanism 60a is an independent driving mechanism arranged on the machine head shell 35, and comprises a presser foot driving motor 2a fixed outside the cavity of the machine head shell 35 and positioned at the back of the machine head shell 35, wherein a power shaft of the presser foot driving motor 2a penetrates into the machine head shell 35 and is connected with a presser foot driving transmission structure 61a for converting rotary power into vertical reciprocating power, and the presser foot driving transmission structure 61a is connected with the presser foot driver 8.

In this embodiment, when the presser foot driver 8 needs to be driven to work, the presser foot driving motor 2a is started, the presser foot driving transmission structure 61a is driven to move by the presser foot driving motor 2a, and then the presser foot driver 8 is driven to axially reciprocate by the presser foot driving transmission structure 61 a.

As shown in fig. 1, the presser foot driving motor 2a is arranged at the back side of the nose casing 35; the guide rod 30 is arranged at the transverse middle part of the front part of the machine head shell 35; the presser foot driving transmission structure 61a penetrates through the cavity of the machine head shell 35 from the rear part of the machine head shell 35 to the transverse middle part of the front part of the machine head shell 35; the presser foot driving transmission structure 61a comprises a rigid coupling component 5a and a power reversing component 6a, one end of the rigid coupling component 5a is connected with the presser foot driving motor 2a, the other end of the rigid coupling component is connected with the power reversing component 6a, and the power reversing component 6a is connected with the presser foot driver 8; the side part of the machine head shell 35 is provided with a shaft seat 112 which is integrally arranged with the machine head shell 35, and the power reversing component 6a passes through the shaft seat 112.

In this embodiment, when the presser foot driving member 3a is required to be driven to work by the presser foot driving motor 2a, the output shaft of the presser foot driving motor 2a is inserted into the rigid coupling assembly 5a, the presser foot driving motor 2a and the presser foot driving mechanism 60a are connected and driven by the rigid coupling assembly 5a and the power reversing assembly 6a, the output shaft of the presser foot driving motor 2a is not required to be too long, the rigidity of the output shaft of the presser foot driving motor 2a is improved in the working process, the working precision of the presser foot driving mechanism 60a is improved, meanwhile, the disassembly and assembly are simpler, the connection is convenient, the maintenance cost and the difficulty are lower, and the power reversing assembly 6a can convert the rotation power generated by the output shaft of the presser foot driving motor 2a into the vertical reciprocating power to drive the presser foot driving mechanism 60a to reciprocate vertically, so as to play the roles of transmission and change the moving direction, and press cloth.

The rigid coupling assembly 5a comprises a rigid coupling 7a positioned in the machine head shell 35, one end of the rigid coupling 7a is connected with the presser foot driving motor 2a, the other end of the rigid coupling is connected with one end of the transmission shaft 8a, and the other end of the transmission shaft 8a is connected with the power reversing assembly 6 a; the rigid coupling 7a is provided with a longitudinally-through opening 9a, a power shaft 10a of the independent presser foot driver 8 is arranged at one end of the rigid coupling 7a in a penetrating manner, one end of the transmission shaft 8a is arranged at the other end of the rigid coupling 7a in a penetrating manner, and the rigid coupling 7a is provided with at least one locking screw 11a which closes the opening 9a so as to fasten the power shaft 10a and the transmission shaft 8 a; the side part of the machine head shell 35 is provided with a shaft seat 112 which is integrally arranged with the machine head shell 35, the transmission shaft 8a is rotatably arranged in the shaft seat 112 in a penetrating way, and at least one bearing 13a is arranged between the shaft seat 112 and the transmission shaft 8 a; the power reversing assembly 6a comprises a driving piece 16a, the driving piece 16a is fixedly connected with a transmission shaft 8a, a transmission connecting rod 17a is rotatably connected at the position, deviating from the central axis of the transmission shaft 8a, of the driving piece 16a, the other end of the transmission connecting rod 17a is rotatably connected with the presser foot driver 8, and a vertical sliding guide mechanism 18a is arranged between the presser foot driver 8 and a machine head shell 35. The vertical sliding guide mechanism 18a comprises a sliding rod 19a arranged on the machine head shell 35, and the presser foot driver 8 is sleeved on the sliding rod 19a in a sliding manner. The presser foot driver 8 comprises a sliding sleeve 20a, the sliding sleeve 20a is in sliding sleeve connection with a sliding rod 19a, a lateral extension part 21a is arranged on the lateral part of the sliding sleeve 20a, a sliding groove 23a is arranged at the outer end of the lateral extension part 21a, and the sliding groove 23a is in sliding sleeve connection with the guide rod 30. A presser foot bar 24a is vertically arranged at the front part of the machine head shell 35, and a clutch transmission structure is arranged between the presser foot bar 24a and the transverse extension part 21 a; the clutch transmission structure comprises a clamping groove 25a arranged on the front surface of the transverse extension part 21a and a presser foot driving slide block 26a fixedly arranged on the presser foot bar 24a, wherein the presser foot driving slide block 26a is provided with a clamping head 43 horizontally entering the clamping groove 25 a.

In this embodiment, the output shaft of the presser foot driving motor 2a is connected with the transmission shaft 8a through the rigid coupling 7a, so as to maintain good coaxiality, then the transmission shaft 8a drives the power reversing assembly 6a to rotate, so as to drive the presser foot driving member 3a to move up and down, change of the moving direction is completed, further, cloth pressing is realized, the output shaft of the presser foot driving motor 2a is the power shaft 10a, the opening 9a is used for facilitating insertion of the power shaft 10a and the transmission shaft 8a into the rigid coupling 7a, one end of the rigid coupling 7a is in clearance fit with the power shaft 10a of the presser foot driving motor 2a, the other end of the rigid coupling 7a is in clearance fit with the transmission shaft 8a, and is locked by the locking screw 11a, so as to ensure synchronous rotation, the shaft seat 12a is used for placing the bearing 13a, the inner ring of the bearing 13a is in clearance fit with the transmission shaft 8a, the outer ring of the bearing 13a is in transition fit with the installation inner hole of the machine head housing 35, the bearing 13a is used for bearing radial load and axial load, and is responsible for supporting the transmission shaft 8a, and transmission accuracy and service life of the transmission shaft 8a are improved; when the transmission shaft 8a rotates, the driving piece 16a and the transmission connecting rod 17a can be synchronously driven to rotate, and the transmission connecting rod 17a is arranged at the position where the driving piece 16a deviates from the central axis of the transmission shaft 8a and the transmission connecting rod 17a can rotate, so that the presser foot driving piece 3a is driven to reciprocate in a straight line along the vertical direction, the vertical sliding guide mechanism 18a plays a limiting and deviation preventing role on the presser foot driving piece 3a, the occurrence of angular deviation of the presser foot driving piece 3a in the up-and-down movement process is avoided, and the displacement accuracy is improved; the presser foot driving piece 3a is sleeved on the slide rod 19a in a sliding way, so that the presser foot driving piece 3a is ensured to vertically move along the axial direction of the slide rod 19a in the up-down movement process;

The slide bar 19a slides and wears to locate in the spout 23a and the sliding fit between sliding sleeve 20a and the slide bar 19a, plays two-way spacing to sliding sleeve 20a, avoids sliding sleeve 20a to take place skew and rotation on the horizontal circumference face, through inserting draw-in gear 43 to draw-in groove 25a in, is connected with presser foot drive slider 26a and presser foot bar 24a, and easy dismounting is connected with the presser foot bottom bar 24a, is equipped with the presser foot packing ring on the presser foot, and the presser foot packing ring can effectually play the presser foot in the high-speed motion buffering of upper and lower, the shock absorption.

As shown in fig. 8-10, the handpiece housing 35 includes a housing seat 100 with an integral structure, the housing seat 100 includes a back plate 101, an inclined bottom plate 102 is provided at the lower end of the back plate 101, one side of the back plate 101 and the inclined bottom plate 102 is provided with a full side plate 103, the other side is provided with a half side plate 104, a cantilever 105 is provided above the half side plate 104, the cantilever 105 and the upper part of the full side plate 103 are both connected with a guide rail seat 106 transversely arranged, an opening 107 is formed between the cantilever 105 and the half side plate 104, the back plate 101, the inclined bottom plate 102, the full side plate 103, the half side plate 104, the cantilever 105 and the guide rail seat 106 are connected into a whole, a spindle mounting hole 108 is provided at the upper part of the full side plate 103, and the spindle mounting hole 108 is opposite to the opening 107; the top of the half side plate 104 is provided with a protruding shaft seat 112, the shaft seat 112 is provided with a transmission shaft hole 114 which is penetrated from front to back, and the shaft seat 112 is positioned in the middle of the top of the half side plate 104 and is connected with the half side plate 104 into a whole; a sealing side plate 115 is arranged at the opening 107, the sealing side plate 115 comprises at least one spliced side plate 116, a main shaft through hole 117 is arranged on the sealing side plate 115, and the main shaft through hole 117 coincides with the central axis of the main shaft mounting hole 108; the sealing side plates 115 include a plurality of spliced side plates 116, wherein half holes 118 are respectively arranged on the two spliced side plates 116, and the two half holes 118 are spliced into the main shaft through hole 117; one side of the shaft seat 112, which is close to the back plate 101, is provided with a mounting notch 119, the other side is provided with a yielding notch 120, and a sealing plate 121 is detachably fixed at the mounting notch 119; the power reversing component 6a partially penetrates through the clearance gap 120 during operation.

In this embodiment, the spindle mounting hole 108 and the opening 107 can facilitate the installation and fixation of the driving piece by a worker, the casing adopts a semi-open type opening structure, after the machine head and the driving piece are placed on the casing seat 100, the full side plate 103 and the semi-side plate 104 are connected and fixed with the casing seat 100, which is convenient for the worker to disassemble and assemble, reduces the difficulty of installation and maintenance, reduces the maintenance cost caused by the damage of the integrated parts, controls the maintenance cost, and is convenient for maintenance and detection of the internal structure, the shaft seat 112 is used for installing and fixing the transmission shaft, the transmission shaft can be penetrated through the transmission shaft hole 114, the transmission shaft is positioned through the transmission shaft hole 114, the presser foot driving motor shaft hole 113 is used for penetrating through the rotation shaft of the presser foot driving motor, the central axis of the presser foot driving motor shaft hole 113 coincides with the central axis of the transmission shaft hole 114, thereby ensuring the high efficiency and precision of power transmission and achieving the purpose of coaxial power transmission; the sealing side plate 115 is used for shielding the sealing opening 107, the main shaft through hole 117 is used for positioning and penetrating the main shaft, the main shaft through hole 117 coincides with the central axis of the main shaft mounting hole 108, so that the main shaft is ensured not to incline when being mounted and fixed, and the main shaft is ensured to be placed in a horizontal state;

The main shaft through hole 117 is formed by two half holes 118 after two spliced side plates 116 are close to each other, adopts a symmetrical structure, is relatively accurate in alignment, and the installation notch 119 facilitates the installation of the fixed shaft seat 112 by a worker, provides an operable space during disassembly and assembly, and the abdication notch 120 plays a abdication role, so that the space can be reasonably utilized better.

As shown in fig. 11, the needle bar driving mechanism 130 includes a driving cam 132 fixed on a main shaft 131, a circular ring sleeve 133 is sleeved on the periphery of the driving cam 132, a handle 134 is arranged at the outer end of the circular ring sleeve 133, the handle 134 is hinged to the middle part of a transmission arm 135, the rear end of the transmission arm 135 is rotatably connected with a column 136 on a fixed machine head casing 35, the front end is rotatably connected with one end of a small connecting rod 137, and the other end of the small connecting rod 137 is rotatably connected with the needle bar driver 31.

In this embodiment, when the needle bar driver 31 needs to be driven to reciprocate axially along the guide bar 30, the driving cam 132 is rotated to drive the annular sleeve 133 and the handle 134 to reciprocate, and drive the driving arm 135 and the small connecting rod 137 to reciprocate synchronously, so as to drive the needle bar driver 31 to reciprocate axially.

The needle bar driver 31 is connected with the needle bar 5 through the clutch structure 32, the needle bar 5 axially movably penetrates through a needle bar frame arranged at the front part of the machine head shell 35, an axial anti-falling structure 50 is arranged between the needle bar driver and the needle bar frame, a compression spring 51 is sleeved on the needle bar 5, one end of the compression spring 51 acts on the needle bar frame, the other end acts on the needle bar 5, and when the clutch structure 32 is in a state that the needle bar driver 31 is separated from the needle bar 5, the needle bar 5 is lifted by the compression spring 51, so that the needle bar 5 is in a position locking state.

In this embodiment, the presser foot driver 8 and the needle bar driver 31 can do reciprocating rectilinear motion along the axial direction of the guide bar 30, the clutch structure 32 can be driven to do circumferential rotation along the axial direction of the guide bar 30 by the linkage type clutch control structure 33, and then the connection or disconnection between the needle bar driver 31 and the needle bar 5 can be switched through the rotation of the clutch structure 32, when the lock head is required to be not operated, the needle bar 5 can be disconnected from the needle bar driver 31 by the linkage type clutch control structure 33, the needle bar 5 is not dropped down any more, the presser foot is prevented from being impacted by the high-speed needle bar, the mechanical parts are damaged, the needle bar 5 is reconnected and the needle bar 5 is enabled to drop down again, only the clutch structure 32 is required to be rotated to the initial position, the needle bar 5 is driven to drop continuously by the needle bar driver 31, the axial anti-drop structure 50 can prevent the needle bar 5 from penetrating into the needle bar frame, and the compression spring 51 is used for connecting the needle bar 5 under the condition that the needle bar 5 drops axially in the working process, when the clutch structure 32 is in the needle bar driver 31 and the needle bar 5 is in the separated state, the needle bar 5 is ensured to be in the compressed spring 51 state, the needle bar 5 is lifted up by the compression spring 51, and the needle bar 5 is locked in the locked position, and the needle bar is completed.

The linkage type clutch control structure 33 comprises a transmission mechanism 34 arranged on one side of the guide rod 30, wherein the power input end of the transmission mechanism 34 is connected with the presser foot driver 8 in a lifting state, and the power output end of the transmission mechanism 34 acts on the needle bar driver 31 to control the clutch structure 32; the transmission mechanism 34 comprises a transmission member 36 with the middle part rotatably connected with the machine head shell 35, the transmission member 36 is in a V shape, a supported part 37 is arranged at the lower end of the transmission member 36, a pushing part 38 acting on the needle bar driver 31 is arranged at the upper end of the transmission member 36, and a pushing part 39 lifting the supported part 37 when the presser foot driver 8 is in a lifting state is arranged on the presser foot driver 8; the pushing part 39 is arranged on the presser foot driver 8 and extends transversely, and the pushing part 39 and the presser foot driver 8 are connected into a whole; the supporting part 37 is fixed at the lower end of the transmission piece 36 through a pin 40 extending transversely, and the supporting part 37 extends forwards; the pushing part 39 is positioned above the supported part 37, and the vertical projections of the pushing part and the supported part are mutually intersected; the pushing part 38 is cylindrical and transversely extends to the front side of the needle bar driver 31; the transmission member 36 is arranged on the machine head shell 35 through a rotating shaft 41, a return torsion spring 42 is sleeved on the rotating shaft 41, and the return torsion spring 42 acts on the transmission member 36 and the machine head shell 35 respectively.

In this embodiment, when the presser foot driver 8 lifts up, the lifting part 39 on the presser foot driver 8 abuts against the supported part 37 at the lower end of the transmission member 36 and drives the supported part 37 to rotate, in the process of rotating the supported part 37, the pushing part 38 is synchronously driven to rotate and drive the clutch structure 32 on the needle bar driver 31 to do circumferential rotation along the axial direction of the guide rod 30, the separation between the needle bar driver 31 and the needle bar 5 is completed, the transmission member 36 is V-shaped, when the lifting part 39 lifts up, the pushing part 38 can rotate towards one end close to the needle bar driver 31, the lifting part 39 is arranged on the presser foot driver 8 and extends transversely, the supporting part 37 extends forwards, the lifting part 39 is positioned above the supporting part 37 and the vertical projections of the two are intersected, the setting ensures that the lifting part 39 always keeps abutting against the supporting part 37 in the lifting process, and drives the supporting part 37 to rotate, in the process of rotating the supporting part 37, in the process, the pushing part 38 can be synchronously driven to rotate towards one end close to the needle bar driver 31, the pushing part 38 is in a cylindrical shape, and extends transversely to the side of the needle bar driver 31, the torsion spring is not required to rotate, the torsion spring is required to rotate towards the axial direction of the rotary shaft 41, the rotary shaft 41 is arranged in the direction of the rotary shaft 41, the rotary shaft is automatically reset, the rotary shaft is enabled to rotate, and the rotary shaft is enabled to rotate around the rotary shaft 41, and the rotary shaft is enabled to rotate around the axial direction of the rotary shaft 36, and the rotary shaft is always and the front and can be driven by the rotary shaft 31.

The needle bar driver 31 comprises a lifting slide seat 1 sleeved on the guide bar 30, the lifting slide seat 1 is provided with a driving clutch piece 4 which is axially positioned and circumferentially rotatably connected with the lifting slide seat, a clutch structure 32 which can be separated from the needle bar 5 after the driving clutch piece 4 circumferentially rotates is arranged between the driving clutch piece 4 and the needle bar 5, a circumferential rotation reset spring 7 which can reset the driving clutch piece 4 after the circumferential rotation and enable the needle bar driver 31 to be connected with the needle bar 5 again is arranged between the lifting slide seat 1 and the driving clutch piece 4, a presser foot linkage part 9 which axially extends along the driving clutch piece 4 is arranged on the driving clutch piece 4, and a pushing part 38 is in sliding contact or rolling contact with the presser foot linkage part 9.

In this embodiment, the reset spring 7 is capable of playing an automatic reset role when the clutch member 4 is required to be restored to an initial state after being driven to rotate, the lifting slide 1 is used for fixing the clutch member 4, the lifting slide 1 can drive the clutch member 4 to axially reciprocate along the guide rod 30, when the lifting slide 1 axially moves, the clutch structure 32 and the needle rod 5 are in a connection state, the clutch member 4 is driven to drive the needle rod 5 to fall, when the lock is required to be not operated, the presser foot driver 8 is lifted, the presser foot linkage part 9 and the clutch member 4 are driven to circumferentially rotate through the pushing part 38, the needle rod 5 is separated from the clutch structure 32, the lifting slide 1 and the clutch member 4 still reciprocate in the axial direction to perform linear motion, the needle rod 5 is not needled any more, the presser foot is prevented from being impacted by the high-speed needle rod, mechanical parts are damaged, locking of the needle rod driver is achieved, the locking is simple and convenient, when the needle falling is required, the clutch structure 32 is rotated to the initial position, the needle rod 5 is enabled to be connected with the clutch structure 32 again, the needle rod is driven to fall continuously, the needle rod is enabled to be driven to be separated from the connection, and the needle rod is switched easily, and the practicality is high.

As shown in fig. 7, the presser foot linkage part 9 is columnar and is arranged at one side of the driving clutch member 4, and two ends of the presser foot linkage part 9 respectively exceed the end parts of the driving clutch member 4; the other side of the driving clutch piece 4 is provided with a motor pushing part 13, two ends of the motor pushing part 13 respectively exceed the end parts of the driving clutch piece 4, a motor pushing mechanism 52 is arranged on the outer side of the motor pushing part 13, the motor pushing mechanism 52 comprises a motor 53 fixed on a machine head shell 35, a swing arm 54 is fixed on an output shaft of the motor 53, a push rod 55 is fixed at the outer end of the swing arm 54, and the push rod 55 is in sliding contact or rolling contact with the motor pushing part 13.

In the embodiment, the presser foot linkage part 9 is columnar, so that the presser foot linkage part is convenient to be in abutting fit with the pushing part 38, and two ends of the presser foot linkage part 9 respectively exceed the end parts of the driving clutch 4, so that the pushing part 38 and the linkage part 9 are ensured to keep a linkage state when swinging; both ends of the motor pushing part 13 respectively exceed the end parts of the driving clutch piece 4, so that the lock motor can be always kept in a linkage state with the motor pushing part 13;

when the clutch 4 needs to be prevented from continuing to rotate in the counterclockwise direction after the initial state is restored, the motor 53 is started, the swing arm 54 and the push rod 55 are driven to rotate through the rotating shaft of the motor 53, so that the push rod 55 is abutted against the motor pushing part 38, and the clutch is prevented from continuing to rotate in the counterclockwise direction towards the motor pushing part 38, and the limiting function is achieved.

The pushing part 38 is positioned at the front side of the presser foot linkage part 9, and the push rod 55 is positioned at the rear side of the motor pushing part 13; a rotation limiting structure 10 is arranged between the lifting sliding seat 1 and the driving clutch piece 4, the limiting direction of the rotation limiting structure 10 is opposite to the circumferential rotation direction of the driving clutch piece 4, the rotation limiting structure 10 comprises a limiting body 11 fixed on the lifting sliding seat 1 and a limiting surface 12 arranged on the driving clutch piece 4, the limiting body 11 and the limiting surface 12 are abutted against each other under the action of a circumferential rotation reset spring 7, and when the limiting body 11 and the limiting surface 12 are abutted against each other, the clutch structure 32 is in a state that a needle rod driver 31 is connected with a needle rod 5; the push rod 55 comprises a rod body 56 and a rolling body 57 rotatably connected to the outer end of the rod body 56, and the rolling body 57 is contacted with the motor pushing part 13; the driving clutch 4 is made of plastic; the circumferential rotation reset spring 7 comprises a torsion spring, one foot of the torsion spring is connected with the lifting slide seat 1, and the other foot of the torsion spring is connected with the driving clutch piece 4; the clutch structure 32 comprises a bayonet 21 arranged on the driving clutch member 4 and a clamping head 43 arranged on the needle bar 5, wherein the bayonet 21 transversely extends and two ends of the bayonet are communicated, and the clamping head 43 can be clamped into or separated from the bayonet 21 when the driving clutch member 4 circumferentially rotates.

In this embodiment, when the clutch structure 32 rotates to the state where the needle rod 5 is connected, the limiting surface 12 on the driving clutch member 4 is in abutting fit with the limiting body 11, so that the driving clutch member 4 can not rotate in a direction opposite to the circumferential rotation direction of the driving clutch member 4, limiting of the driving clutch member 4 is achieved, and the clutch structure 32 and the needle rod 5 are tightly connected in the connected state; when the driving clutch 4 is required to avoid the driving clutch 4 from continuing to rotate in the anticlockwise direction after the initial state is restored, the motor 53 is started, and the swing arm 54, the rod body 56 and the rolling body 57 are driven to rotate through the rotating shaft of the motor 53, so that the rolling body 57 is abutted with the motor pushing part 38, and the continuous anticlockwise rotation of the motor pushing part 38 is avoided, and the limiting effect is achieved; the torsional spring can drive the drive clutch piece 4 after circumferential rotation to rotate to the initial position, and bayonet socket 21 is used for inserting the dop 43 on the fixed needle bar 5, and then connects needle bar 5, and after drive clutch piece 4 rotates, can make dop 43 on the needle bar 5 break away from buckle 21, accomplishes the breaking away from to the needle bar.

The working principle of the invention is as follows:

The presser foot driver 8 and the needle bar driver 31 can do reciprocating rectilinear motion along the axial direction of the guide rod 30, the clutch structure 32 can be driven to do circumferential rotation along the axial direction of the guide rod 30 through the linkage clutch control structure 33, then the connection or disconnection state between the needle bar driver 31 and the needle bar 5 is switched through the rotation of the clutch structure 32, when a lock is required to be not operated, the presser foot driver 8 is lifted upwards, a lifting part 39 on the presser foot driver 8 is abutted with a bearing part 37 at the lower end of a transmission piece 36 and drives the bearing part 37 to rotate, the pushing part 38 is synchronously driven to rotate in the rotation process of the bearing part 37 and drives the clutch structure 32 on the needle bar driver 31 to do circumferential rotation along the axial direction of the guide rod 30, the disconnection between the needle bar driver 31 and the needle bar 5 is completed, the transmission piece 36 is in a V shape, when the pushing part 38 is enabled to rotate towards one end close to the needle bar driver 31, a clamping head 43 on the needle bar 5 is enabled to be disconnected from 21, the needle bar is completed to be disconnected from the needle bar, the needle bar 5 is not dropped down again, the needle bar is prevented from being connected to the needle bar 5 again through the high-speed, the needle bar driver is prevented from being connected to the needle bar 5 again, and the needle bar is required to be driven to be disconnected to the needle bar 5 through the needle bar 5.

The torsion spring can drive the clutch 4 to rotate to the initial position after circumferential rotation.

When the clutch structure 32 rotates to the connection state of the needle rod 5, the limiting surface 12 on the driving clutch piece 4 is in abutting fit with the limiting body 11, so that the driving clutch piece 4 can not excessively rotate in the direction opposite to the circumferential rotation direction of the driving clutch piece 4, limiting of the driving clutch piece 4 is realized, and the clutch structure 32 and the needle rod 5 are tightly connected in the connection state.

When the clutch 4 is required to be prevented from continuing to rotate in the counterclockwise direction after the initial state is restored, the motor 53 is started, the swing arm 54, the rod body 56 and the rolling body 57 are driven to rotate through the rotating shaft of the motor 53, the rolling body 57 is abutted against the motor pushing part 38, and the clutch is prevented from continuing to rotate in the counterclockwise direction towards the motor pushing part 38, so that the limiting effect is achieved.

Meanwhile, the presser foot driving motor 2a is arranged outside the cavity of the machine head shell 35, so that the mounting head distance of the machine head shell is shortened, the mounting space is saved, the structure is compact, the space between the heads is reduced, and the embroidery efficiency of large-format embroidery is greatly improved.

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.

Claims

1. The embroidery machine head comprises a machine head shell (35), a guide rod (30) is vertically and fixedly arranged at the front part of the machine head shell (35), a presser foot driver (8) and a needle bar driver (31) are axially and movably arranged on the guide rod (30) at intervals, the needle bar driver (31) is connected with a needle bar driving mechanism (130), the presser foot driver (8) is connected with a presser foot driving mechanism (60 a), the needle bar driver (31) is connected with a needle bar (5) through a clutch structure (32), the embroidery machine head is characterized in that a linkage clutch control structure (33) which is provided with power by the presser foot driver (8) and controls the clutch structure (32) to act is arranged between the presser foot driver (8) and the needle bar driver (31), the linkage clutch control structure (33) controls the clutch structure (32) to act when the presser foot driver (8) is in a lifting state and enables the needle bar driver (31) to be separated from the needle bar (5) mutually, and the presser foot driver (8) is connected with the needle bar driver (31) through a cam mechanism (132) after the presser foot driver (31) is lowered, the linkage clutch control structure (33) is connected with the needle bar driver (130) mutually, the driving cam (132) is externally sleeved with a circular ring sleeve (133), the outer end of the circular ring sleeve (133) is provided with a handle (134), the handle (134) is hinged with the middle part of a transmission arm (135), the rear end of the transmission arm (135) is rotationally connected with a cylinder (136) on a fixed machine head shell (35), the front end of the transmission arm is rotationally connected with one end of a small connecting rod (137), and the other end of the small connecting rod (137) is rotationally connected with the needle bar driver (31);

The presser foot driving mechanism (60 a) is an independent driving mechanism arranged on the machine head shell (35) and comprises a presser foot driving motor (2 a) which is fixed outside the cavity of the machine head shell (35) and positioned at the back of the machine head shell (35), a power shaft of the presser foot driving motor (2 a) penetrates into the machine head shell (35) and is connected with a presser foot driving transmission structure (61 a) which converts rotary power into vertical reciprocating power, and the presser foot driving transmission structure (61 a) is connected with the presser foot driver (8);

the presser foot driving motor (2 a) is arranged at one side of the back of the machine head shell (35); the guide rod (30) is arranged in the transverse middle of the front part of the machine head shell (35); the presser foot driving transmission structure (61 a) penetrates through the cavity of the machine head shell (35) from the rear part of the machine head shell (35) to the transverse middle part of the front part of the machine head shell (35); the presser foot driving transmission structure (61 a) comprises a rigid coupling component (5 a) and a power reversing component (6 a), one end of the rigid coupling component (5 a) is connected with the presser foot driving motor (2 a), the other end of the rigid coupling component is connected with the power reversing component (6 a), and the power reversing component (6 a) is connected with the presser foot driver (8); the side part of the machine head shell (35) is provided with a shaft seat (112) which is integrally arranged with the machine head shell (35), and the power reversing component (6 a) passes through the shaft seat (112);

The needle bar driver (31) is connected with the needle bar (5) through a clutch structure (32), the needle bar (5) axially movably penetrates through a needle bar frame arranged at the front part of the machine head shell (35) and is provided with an axial anti-falling structure (50) between the needle bar driver and the needle bar, the needle bar (5) is sleeved with a compression spring (51), one end of the compression spring (51) acts on the needle bar frame, the other end acts on the needle bar (5), and when the clutch structure (32) is in a state that the needle bar driver (31) is separated from the needle bar (5), the needle bar (5) is lifted by the compression spring (51) so that the needle bar (5) is in a position locking state;

the lifting slide seat (1) and the driving clutch piece (4) which is axially positioned and circumferentially rotatably connected with the lifting slide seat are arranged on the lifting slide seat;

the presser foot linkage part (9) is columnar and arranged at one side of the driving clutch piece (4), and two ends of the presser foot linkage part (9) respectively exceed the end parts of the driving clutch piece (4); the other side of the driving clutch piece (4) is provided with a motor pushing part (13), two ends of the motor pushing part (13) respectively exceed the end part of the driving clutch piece (4), a motor pushing mechanism (52) is arranged on the outer side of the motor pushing part (13), the motor pushing mechanism (52) comprises a motor (53) fixed on a machine head shell (35), a swing arm (54) is fixed on an output shaft of the motor (53), a push rod (55) is fixed at the outer end of the swing arm (54), and the push rod (55) is in sliding contact or rolling contact with the motor pushing part (13);

The rigid coupling assembly (5 a) comprises a rigid coupling (7 a) positioned in a machine head shell (35), one end of the rigid coupling (7 a) is connected with the presser foot driving motor (2 a), the other end of the rigid coupling is connected with one end of the transmission shaft (8 a), and the other end of the transmission shaft (8 a) is connected with the power reversing assembly (6 a); the rigid coupling (7 a) is provided with a longitudinal through opening (9 a), and the rigid coupling (7 a) is provided with at least one locking screw (11 a) penetrating through the opening (9 a) so as to fasten the power shaft (10 a) and the transmission shaft (8 a); the side part of the machine head shell (35) is provided with a shaft seat (112) which is integrally arranged with the machine head shell (35), the transmission shaft (8 a) is rotatably arranged in the shaft seat (112) in a penetrating way, and at least one bearing (13 a) is arranged between the shaft seat (112) and the transmission shaft (8 a); the power reversing assembly (6 a) comprises a driving piece (16 a), the driving piece (16 a) is fixedly connected with a transmission shaft (8 a), the driving piece (16 a) is deviated from the central axis of the transmission shaft (8 a) and is rotationally connected with a transmission connecting rod (17 a), the other end of the transmission connecting rod (17 a) is rotationally connected with a presser foot driver (8), a vertical sliding guide mechanism (18 a) is arranged between the presser foot driver (8) and a machine head shell (35), the vertical sliding guide mechanism (18 a) comprises a sliding rod (19 a) arranged on the machine head shell (35), the presser foot driver (8) is sleeved on the sliding rod (19 a) in a sliding manner, the presser foot driver (8) comprises a sliding sleeve (20 a), the sliding sleeve (20 a) is sleeved with the sliding rod (19 a) in a sliding manner, the lateral part of the sliding sleeve (20 a) is provided with a transverse extending part (21 a), the outer end of the transverse extending part (21 a) is provided with a sliding groove (23 a), the sliding groove (23 a) and the guide rod (30) are sleeved with the front part of the machine head shell (35), and the clutch rod (24 a) is sleeved with the front part of the transmission rod (24 a) in a sliding manner; the clutch transmission structure comprises a clamping groove (25 a) arranged on the front surface of the transverse extension part (21 a) and a presser foot driving slide block (26 a) fixedly arranged on the presser foot bar (24 a), wherein the presser foot driving slide block (26 a) is provided with a clamping head (43) horizontally entering the clamping groove (25 a).

2. The embroidery machine head according to claim 1, wherein the machine head housing (35) comprises a housing seat (100) with an integrated structure, the housing seat (100) comprises a back plate (101), an inclined bottom plate (102) is arranged at the lower end of the back plate (101), a full side plate (103) is arranged at one side of the back plate (101) and the inclined bottom plate (102), a half side plate (104) is arranged at the other side of the back plate, a cantilever (105) is arranged above the half side plate (104), the cantilever (105) and the upper part of the full side plate (103) are connected with a transversely arranged guide rail seat (106), an opening (107) is formed between the cantilever (105) and the half side plate (104), the back plate (101), the inclined bottom plate (102), the full side plate (103), the half side plate (104), the cantilever (105) and the guide rail seat (106) are connected into a whole, a spindle mounting hole (108) is arranged at the upper part of the full side plate (103), and the spindle mounting hole (108) is opposite to the opening (107); the top of the half side plate (104) is provided with a protruding shaft seat (112), the shaft seat (112) is provided with a transmission shaft hole (114) which is penetrated from front to back, and the shaft seat (112) is positioned in the middle of the top of the half side plate (104) and is connected with the half side plate (104) into a whole; the opening (107) is provided with a sealing side plate (115), the sealing side plate (115) comprises at least one spliced side plate (116), the sealing side plate (115) is provided with a main shaft through hole (117), and the main shaft through hole (117) coincides with the central axis of the main shaft mounting hole (108); the sealing side plates (115) comprise a plurality of spliced side plates (116), wherein half holes (118) are respectively arranged on the two spliced side plates (116), and the two half holes (118) are spliced into the main shaft through hole (117); one side of the shaft seat (112) close to the back plate (101) is provided with a mounting notch (119), the other side is provided with a yielding notch (120), and a sealing plate (121) is detachably fixed at the mounting notch (119); the power reversing component (6 a) partially penetrates out of the clearance gap (120) during working.

3. The embroidery machine head according to claim 2, wherein the linkage clutch control structure (33) comprises a transmission mechanism (34) arranged at one side of the guide rod (30), the power input end of the transmission mechanism (34) is connected with the presser foot driver (8) in the lifted state, and the power output end of the transmission mechanism (34) acts on the needle bar driver (31) to control the clutch structure (32); the transmission mechanism (34) comprises a transmission piece (36) with the middle part rotatably connected with the machine head shell (35), the transmission piece (36) is in a V shape, a supporting part (37) is arranged at the lower end of the transmission piece (36), a pushing part (38) acting on the needle bar driver (31) is arranged at the upper end of the transmission piece (36), and a pushing part (39) for lifting the supporting part (37) when the presser foot driver (8) is in a lifting state is arranged on the presser foot driver (8); the pushing and lifting part (39) is arranged on the presser foot driver (8) and transversely extends, and the pushing and lifting part (39) and the presser foot driver (8) are connected into a whole; the supporting part (37) is fixed at the lower end of the transmission piece (36) through a pin (40) extending transversely, and the supporting part (37) extends forwards; the pushing part (39) is positioned above the supported part (37) and the vertical projections of the pushing part and the supported part are mutually intersected; the pushing part (38) is cylindrical and transversely extends to the front side of the needle bar driver (31); the transmission piece (36) is arranged on the machine head shell (35) through a rotating shaft (41), a return torsion spring (42) is sleeved on the rotating shaft (41), and the return torsion spring (42) acts on the transmission piece (36) and the machine head shell (35) respectively.

4. A head of an embroidery machine according to claim 3, characterized in that the needle bar driver (31) comprises a lifting slide seat (1) sleeved on the guide rod (30), the clutch structure (32) which can be separated from the needle bar (5) after the driving clutch member (4) rotates circumferentially is arranged between the driving clutch member (4) and the needle bar (5), a circumferential rotation reset spring (7) which can reset the driving clutch member (4) after the circumferential rotation so as to enable the needle bar driver (31) to be connected with the needle bar (5) again is arranged between the lifting slide seat (1) and the driving clutch member (4), a presser foot portion (9) extending along the axial direction of the driving clutch member (4) is arranged on the driving clutch member (4), and the pushing portion (38) is in sliding contact or rolling contact with the presser foot portion (9).

5. The embroidery machine head according to claim 4, wherein the pushing part (38) is located at the front side of the presser foot linkage part (9), and the push rod (55) is located at the rear side of the motor pushing part (13); a rotation limiting structure (10) is arranged between the lifting sliding seat (1) and the driving clutch piece (4), the limiting direction of the rotation limiting structure (10) is opposite to the circumferential rotation direction of the driving clutch piece (4), the rotation limiting structure (10) comprises a limiting body (11) fixed on the lifting sliding seat (1) and a limiting surface (12) arranged on the driving clutch piece (4), the limiting body (11) and the limiting surface (12) are mutually abutted under the action of a circumferential rotation reset spring (7), and when the limiting body (11) and the limiting surface (12) are mutually abutted, the clutch structure (32) is in a state that a needle bar driver (31) is connected with a needle bar (5); the push rod (55) comprises a rod body (56) and a rolling body (57) rotatably connected to the outer end of the rod body (56), and the rolling body (57) is in contact with the motor pushing part (13); the driving clutch piece (4) is made of plastic; the circumferential rotation reset spring (7) comprises a torsion spring, one foot of the torsion spring is connected with the lifting slide seat (1), and the other foot of the torsion spring is connected with the driving clutch piece (4); the clutch structure (32) comprises a bayonet (21) arranged on the driving clutch piece (4) and a clamping head (43) arranged on the needle rod (5), wherein the bayonet (21) transversely extends and is communicated at two ends, and the clamping head (43) can be clamped into or separated from the bayonet (21) when the driving clutch piece (4) circumferentially rotates.