CN214060897U

CN214060897U - Needle bar driving clutch mechanism

Info

Publication number: CN214060897U
Application number: CN202022301374.0U
Authority: CN
Inventors: 王亮; 曹万里; 李春鹏; 王磊
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: 2021-08-27
Anticipated expiration: 2030-10-15

Abstract

The utility model belongs to the technical field of the embroidery machine, especially, relate to a needle bar drive clutching mechanism. The utility model discloses, including the guide arm of vertical fixed setting, axial activity is provided with presser foot driver and needle bar driver on the guide arm, needle bar driver and presser foot driver set up at vertical direction interval, needle bar driver and needle bar between link to each other through the separation and reunion structure, presser foot driver and needle bar driver between be equipped with the coordinated type separation and reunion control structure that provides power control separation and reunion structure action by the presser foot driver. The utility model discloses a set up coordinated type separation and reunion control structure and separation and reunion structure, when the needs tapered end is out of work, can make needle bar and needle bar driver break away from through coordinated type separation and reunion control structure for the needle bar is no longer lower the needle, avoids high-speed needle bar striking presser foot, damages machine part, reconnect the needle bar and make the needle bar fall again only need with the coordinated structure rotate to initial position can, continue the whereabouts through needle bar driver drive needle bar.

Description

Needle bar driving clutch mechanism

Technical Field

The utility model belongs to the technical field of the embroidery machine, a needle bar drive clutching mechanism is related to.

Background

With the updating of consumption concept and the improvement of aesthetic view, in recent years, the requirements of industries such as home textile, clothing and the like on fabric pattern embroidering processing are higher and higher, and embroidering processing equipment meeting the market development requirements is required to be continuously provided, wherein the requirements include operating performance, application range, production capacity and the like. The needle bar mechanism in the embroidery machine is an important component, and a needle bar driver is generally adopted to drive a needle bar to reciprocate up and down to drop a needle. When the needle bar does not need to fall, the prior art generally realizes control through the tapered end motor. However, if the lock motor fails, the needle bar falls down, which easily causes the needle bar to strike the presser foot and damages other mechanical parts.

In order to overcome the defects of the prior art, people continuously explore and provide various solutions, for example, a chinese patent discloses a lock head [ application No. CN201420377987.4] of a computerized embroidery machine, which comprises a motor, a first bracket, a torsion spring, a roller, a driving shaft, a first driving swing arm, a limit stop, a cushion pad, a pin, a fixed shaft, a second bracket, a handle, a notch, a positioning seat and a second driving swing arm, wherein the first bracket is arranged at the upper end of the motor, the limit stop is arranged on the first bracket, the positioning seat is arranged on the side surface of the first bracket, the first driving swing arm is arranged at the upper end of a main shaft, the driving shaft is arranged on the first driving swing arm, the roller is arranged at the upper end of the driving shaft, one end of the torsion spring is fixedly connected with the first bracket, the other end of the torsion spring is fixedly connected with the first driving swing arm, the second bracket is arranged at the lower end of the motor, the cushion pad and the fixed shaft are arranged on the second bracket, be equipped with the handle on the fixed axle, be equipped with the breach on the handle, the lower extreme of main shaft is equipped with second drive swing arm, be equipped with the pin in the second drive swing arm, the utility model discloses can job stabilization reliable, long service time, easy to operate, simple to operate. This patent attempts to reduce the malfunction by improving the stability and operational convenience of the lock mechanism. However, no matter how to reduce the failure rate, as the tapered end motor is adopted, as long as the motor fails, the failure is inevitably generated, and therefore the failure cannot be avoided.

Disclosure of Invention

The utility model aims at the above-mentioned problem, provide a needle bar drive clutching mechanism.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a needle bar driving clutch mechanism comprises a guide rod which is vertically and fixedly arranged, a presser foot driver and a needle bar driver are axially and movably arranged on the guide rod, the needle bar driver and the presser foot driver are arranged at intervals in the vertical direction, the needle bar driver is connected with a needle bar through a clutch structure, and a linkage type clutch control structure which is powered by the presser foot driver so as to control the clutch structure to act is arranged between the presser foot driver and the needle bar driver.

In the needle bar driving clutch mechanism, the needle bar driver is positioned above the presser foot driver, the linkage type clutch control structure controls the clutch structure to act when the presser foot driver is in a lifting state and the needle bar driver is in a lifting state so as to enable the needle bar driver and the needle bar to be separated from each other, and the clutch structure resets after the presser foot driver descends so as to enable the needle bar driver and the needle bar to be connected with each other.

In the needle bar driving clutch mechanism, the linkage type clutch control structure comprises a transmission mechanism arranged on one side of the guide rod, 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 bar driver.

In the above needle bar driving clutch mechanism, the transmission mechanism includes a transmission member rotatably connected to the machine head at the middle part, the transmission member is V-shaped, a supported part is provided at the lower end of the transmission member, a pushing part acting on the needle bar driver is provided at the upper end of the transmission member, and a lifting part for lifting the supported part when the presser foot driver is in a lifting state is provided on the presser foot driver.

In the needle bar driving clutch mechanism, the pushing and lifting part is arranged on the presser foot driver and transversely extends, and the pushing and lifting part and the presser foot driver are connected into a whole; the supporting part is fixed at the lower end of the transmission part through a pin extending transversely, and the supporting part extends forwards; the pushing and lifting part is positioned above the supported part, and the vertical projections of the pushing and lifting part and the supported part are mutually crossed; the pushing part is cylindrical and transversely extends to the front side of the needle bar driver.

In foretell needle bar drive clutching mechanism, the driving medium set up on the aircraft nose through the pivot, the cover is equipped with the return torsional spring in the pivot, the return torsional spring act on driving medium and aircraft nose respectively.

In the above needle bar driving clutch mechanism, the needle bar driver includes a lifting slide seat sleeved on the guide rod, the lifting slide seat is provided with a driving clutch member axially positioned and circumferentially rotatably connected with the lifting slide seat, a clutch structure capable of being separated from the needle bar after the driving clutch member circumferentially rotates is arranged between the driving clutch member and the needle bar, a circumferentially rotating reset spring capable of resetting the circumferentially rotated driving clutch member so as to enable the needle bar driver to be connected with the needle bar again is arranged between the lifting slide seat and the driving clutch member, the driving clutch member is provided with a presser foot linkage part axially extending along the driving clutch member, and the pushing part is in sliding contact or rolling contact with the presser foot linkage part.

In the needle bar driving clutch mechanism, the presser foot linkage part is columnar and is arranged at one side of the driving clutch piece, and two ends of the presser foot linkage part respectively exceed the end part of the driving clutch piece; the driving clutch piece is also provided with a lock head motor pushing part which is columnar and arranged on the other side of the driving clutch piece, and two ends of the lock head motor pushing part respectively exceed the end parts of the driving clutch piece.

In foretell needle bar drive clutching mechanism, lift slide and drive clutch piece between be equipped with and rotate limit structure, the spacing direction of rotation limit structure opposite with the circumferential direction of drive clutch piece, rotation limit structure including fix the spacing body on the lift slide and set up the spacing face on drive clutch piece, spacing body and spacing face support each other under circumferential direction reset spring's effect and support and lean on, and support when spacing body and spacing face support each other and support the time separation and reunion structure be in needle bar driver and needle bar link to each other state.

In the needle bar driving clutch mechanism, the driving clutch part is made of plastics; the circumferential rotation return spring comprises a torsion spring, one foot of the torsion spring is connected with the lifting sliding 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 chuck arranged on the needle rod, the bayonet transversely extends, two ends of the bayonet are communicated, and the chuck can be clamped into or separated from the bayonet when the driving clutch piece rotates circumferentially.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses a set up coordinated type separation and reunion control structure and separation and reunion structure, when the needs tapered end is out of work, can make needle bar and needle bar driver break away from through coordinated type separation and reunion control structure for the needle bar is no longer lower the needle, avoids high-speed needle bar striking presser foot, damages machine part, reconnect the needle bar and make the needle bar fall again only need with the coordinated structure rotate to initial position can, continue the whereabouts through needle bar driver drive needle bar. Namely, a linkage relation is established between the presser foot driver and the needle bar driver, and clutch control can be realized through a mechanical mode even if a tapered end motor is not arranged.

2. The utility model discloses when needle bar separation and reunion structure rotated to the needle bar state of linking to each other, spacing face on the drive separation and reunion piece can cooperate with spacing body looks butt for the drive separation and reunion piece can not carry out excessive rotation to the opposite direction of the circumferential direction of drive separation and reunion piece again, realizes spacing to the drive separation and reunion piece, and makes separation and reunion structure and needle bar realize zonulae occludens under the state of linking to each other.

3. The utility model discloses a to push away the portion of rising and locate on the presser foot driver and transversely extend the setting, the setting is extended forward to the portion of being held in the palm for push away the portion of rising and be located the vertical projection intercrossing of portion of being held in the palm top and both, can ensure that the portion of pushing away keeps the butt with the portion of being held in the palm all the time at the lifting in-process, and drive the portion of being held in the palm and rotate.

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 diagram of the present invention.

Fig. 2 is a schematic view of a partial structure of the present invention.

Fig. 3 is a schematic structural view of the needle bar driver.

Fig. 4 is a schematic structural view in another direction of the present invention.

In the figure: the device comprises a lifting slide seat 1, a needle bar 5, a circumferential rotation reset spring 7, a presser foot driver 8, a presser foot linkage part 9, a rotation limiting structure 10, a limiting body 11, a limiting surface 12, a lock head motor pushing part 13, a bayonet 21, a guide rod 30, a needle bar driver 31, a clutch structure 32, a linkage type clutch control structure 33, a transmission mechanism 34, a machine head 35, a transmission part 36, a supported part 37, a pushing part 38, a pushing and lifting part 39, a pin 40, a rotating shaft 41, a return torsion spring 42, a clamping head 43, a lock head transmission mechanism 52 and a lock head motor 53.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-4, a needle bar driving clutch mechanism comprises a guide rod 30 which is vertically and fixedly arranged, a presser foot driver 8 and a needle bar driver 31 are axially and movably arranged on the guide rod 30, the needle bar driver 31 and the presser foot driver 8 are arranged at intervals in the vertical direction, the needle bar driver 31 is connected with a needle bar 5 through a clutch structure 32, and a linkage type 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.

In this embodiment, the presser foot driver 8 and the needle bar driver 31 can make reciprocating linear motion along the axial direction of the guide rod 30, the linkage type clutch control structure 33 can drive the clutch structure 32 to make circumferential rotation along the axial direction of the guide rod 30, and further complete the state switching of connection or disconnection between the needle bar driver 31 and the needle bar 5 through the rotation of the clutch structure 32, when the lock is required to be out of work, the needle bar 5 can be disconnected from the needle bar driver 31 through the linkage type clutch control structure 33, the needle bar 5 is not required to be fed, the high-speed needle bar is prevented from impacting the presser foot, mechanical parts are damaged, the needle bar 5 is reconnected, and the needle bar 5 falls again only by rotating the clutch structure 32 to the initial position, and the needle bar 5 is driven to continuously fall through the needle bar driver 31. The utility model discloses set up the linkage relation between presser foot driver 8 and needle bar driver 31, even if do not set up tapered end motor 53 and also can realize the separation and reunion control of needle bar driver 31 and needle bar 5 through mechanical system.

As shown in fig. 1-4, the needle bar driver 31 is located above the presser foot driver 8, the linkage type clutch control structure 33 controls the clutch structure 32 to operate when the presser foot driver 8 is in the lifted state and the needle bar driver 31 is in the lifted state, so as to separate the needle bar driver 31 from the needle bar 5, and the clutch structure 32 is reset after the presser foot driver 8 is lowered, so as to connect the needle bar driver 31 with the needle bar 5.

In this embodiment, after presser foot driver 8 upwards lifts, drive coordinated type separation and reunion control structure 33 and rotate, through coordinated type separation and reunion control structure 33 and the butt effect between the separation and reunion structure 32 drive separation and reunion structure 32 and rotate, make needle bar driver 31 and needle bar 5 break away from each other, accomplish breaking away from of needle bar 5 and ensure that needle bar 5 no longer stitches, avoid high-speed needle bar striking presser foot, damage machine part, when needing to reconnect needle bar 5 and make needle bar 5 fall again, only need with presser foot driver 8 descend to initial position and with the structure 32 that closes reset can, make separation and reunion structure 32 and needle bar 5 reconnect, and continue to drive needle bar 5 whereabouts through needle bar driver 31.

As shown in fig. 2, the linkage clutch control structure 33 includes a transmission mechanism 34 disposed on one side of the guide rod 30, a power input end of the transmission mechanism 34 is connected to the presser foot driver 8 in the lifted state, and a power output end of the transmission mechanism 34 acts on the needle bar driver 31.

In this embodiment, when the presser foot driver 8 is lifted upwards, the transmission mechanism 34 is driven to rotate by the abutting action between the presser foot driver 8 and the power input end of the transmission mechanism 34, and the rotating force is transmitted to the power output end of the transmission mechanism 34 and acts on the needle bar driver 31, so that the clutch structure 32 on the needle bar driver 31 rotates circumferentially along the axial direction of the guide rod 30, and the needle bar driver 31 and the needle bar 5 are disengaged.

As shown in fig. 1 and 2, the transmission mechanism 34 includes a transmission member 36 rotatably connected to the head 35 at a middle portion, the transmission member 36 is V-shaped, a supported portion 37 is provided at a lower end of the transmission member 36, a pushing portion 38 acting on the needle bar driver 31 is provided at an upper end of the transmission member 36, and the presser foot driver 8 is provided with a pushing portion 39 for lifting the supported portion 37 when the presser foot driver 8 is in a lifted state.

In this embodiment, when the presser foot driver 8 is lifted upwards, the lifting portion 39 on the presser foot driver 8 abuts against the supported portion 37 at the lower end of the transmission member 36 and drives the supported portion 37 to rotate, and in the rotating process of the supported portion 37, the pushing portion 38 is synchronously driven to rotate and drive the clutch structure 32 on the needle bar driver 31 to rotate circumferentially along the axial direction of the guide rod 30, so as to complete the separation between the needle bar driver 31 and the needle bar 5, and the transmission member 36 is V-shaped, so that when the lifting portion 39 is lifted upwards, the pushing portion 38 can rotate towards the end close to the needle bar driver 31.

As shown in fig. 2, the pushing-up portion 39 is provided on the presser foot driver 8 and extends laterally, and the pushing-up portion 39 is integrally connected with the presser foot driver 8; the supported part 37 is fixed at the lower end of the transmission piece 36 through a pin 40 extending transversely, and the supported part 37 extends forwards; the pushing and lifting part 39 is positioned above the supported part 37, and the vertical projections of the two parts are crossed; the pushing portion 38 is cylindrical and extends transversely to the front side of the needle bar driver 31.

In this embodiment, the pushing portion 39 is disposed on the presser foot driver 8 and extends laterally, the supported portion 37 extends forward, the pushing portion 39 is located above the supported portion 37, and vertical projections of the two intersect with each other, this arrangement ensures that the pushing portion 39 always keeps abutting against the supported portion 37 in the lifting process, and drives the supported portion 37 to rotate, the supported portion 37 can synchronously drive the pushing portion 38 to rotate towards one end close to the needle bar driver 31 in the rotating process, the pushing portion 38 is cylindrical and extends laterally to the front side of the needle bar driver 31, and it can ensure that the pushing portion 38 always abuts against the needle bar driver 31 in the rotating process.

As shown in fig. 1 and 2, the transmission member 36 is disposed on the machine head 35 through a rotating shaft 41, and 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 35 respectively.

In this embodiment, the transmission member 36 is disposed on the machine head 35 through the rotating shaft 41, so that the transmission member 36 can rotate along the axis direction of the rotating shaft 41, the rotating shaft 41 is sleeved with the return torsion spring 42, and after the pushing portion 39 descends, the transmission member 36 can automatically rotate to the initial position through the torsion action of the return torsion spring 42 without manual reset.

As shown in fig. 1 and 3, the needle bar driver 31 includes a lifting slide base 1 sleeved on a guide rod 30, the lifting slide base 1 is provided with a driving clutch member 4 axially positioned and circumferentially rotatably connected with the lifting slide base 1, a clutch structure 32 capable of separating from the needle bar 5 after the driving clutch member 4 circumferentially rotates is provided between the driving clutch member 4 and the needle bar 5, a circumferentially rotating return spring 7 capable of returning the circumferentially rotated driving clutch member 4 to connect the needle bar driver 31 with the needle bar 5 again is provided between the lifting slide base 1 and the driving clutch member 4, the driving clutch member 4 is provided with a presser foot linkage portion 9 axially extending along the driving clutch member 4, and the pushing portion 38 is in sliding contact or rolling contact with the presser foot linkage portion 9.

In this embodiment, the circumferential direction reset spring 7 can play a role of automatic reset when the initial state needs to be restored after the drive clutch member 4 rotates, the lifting slide seat 1 is used for fixing the drive clutch member 4, the lifting slide seat 1 can drive the drive clutch member 4 to axially reciprocate along the guide rod 30, when the lifting slide seat 1 axially moves, the clutch structure 32 is in a connection state with the needle rod 5, the drive clutch member 4 drives the needle rod 5 to fall down, when the lock does not work, the needle rod 5 does not need to be inserted, the push part 38 drives the presser foot linkage part 9 and the drive clutch member 4 to circumferentially rotate, so that the needle rod 5 is separated from the clutch structure 32, the lifting slide seat 1 and the drive clutch member 4 still linearly reciprocate along the axial direction, the needle rod 5 does not need to be inserted, the high-speed needle rod is prevented from impacting the presser foot, mechanical parts are damaged, and the locking of the needle rod driver is realized, the locking is simple and convenient, when the needle needs to fall, the clutch structure 32 is rotated to the initial position, so that the needle rod 5 is reconnected with the clutch structure 32, the needle rod can be continuously driven to fall, the separation and connection switching of the needle rod are simple and convenient, and the practicability is strong.

As shown in fig. 3 and 4, 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 part of the driving clutch member 4; the driving clutch part 4 is also provided with a lock motor pushing part 13, the lock motor pushing part 13 is columnar and is arranged at the other side of the driving clutch part 4, and two ends of the lock motor pushing part 13 respectively exceed the end parts of the driving clutch part 4. A lock motor 53 and a lock transmission mechanism 52 connected with the lock motor 53 are arranged outside the lock motor pushing part 13, and the lock transmission mechanism acts on the driving clutch part 4 to realize the clutch control of the needle rod driver 31 and the needle rod 5. Namely, the electric control of the locking motor 53 and the mechanical control of the linkage type 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.

In this embodiment, the presser foot linkage part 9 is columnar so as to be in butt 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 members 4, so as to ensure that the pushing part 38 keeps a linkage state with the linkage part 9 during swinging; the two ends of the tapered end motor pushing part 13 respectively exceed the end parts of the driving clutch part 4, so that the tapered end motor 53 can be ensured to be always in linkage state with the tapered end motor pushing part 13.

As shown in fig. 3, a rotation limiting structure 10 is arranged between the lifting slide 1 and the driving clutch member 4, the limiting direction of the rotation limiting structure 10 is opposite to the circumferential direction of the driving clutch member 4, the rotation limiting structure 10 comprises a limiting body 11 fixed on the lifting slide 1 and a limiting surface 12 arranged on the driving clutch member 4, the limiting body 11 and the limiting surface 12 are abutted against each other under the action of the circumferential rotation return 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 the needle bar driver 31 is connected with the needle bar 5.

In this embodiment, when the clutch structure 32 rotates to the state where the needle rods 5 are 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 cannot rotate in the direction opposite to the circumferential direction of the driving clutch member 4, the driving clutch member 4 is limited, and the clutch structure 32 and the needle rods 5 are tightly connected in the state where they are connected.

As shown in fig. 1 and 3, the driving clutch 4 is made of plastic; the circumferential rotation return spring 7 comprises a torsion spring, one foot of the torsion spring is connected with the lifting sliding seat 1, and the other foot of the torsion spring is connected with the driving clutch part 4; the clutch structure 32 comprises a bayonet 21 arranged on the driving clutch part 4 and a chuck 43 arranged on the needle rod 5, the bayonet 21 transversely extends, two ends of the bayonet are communicated, and the chuck 43 can be clamped into or separated from the bayonet 21 when the driving clutch part 4 rotates in the circumferential direction.

In this embodiment, drive clutch 4 is made by plastics and is reduced the impact sound that produces when promoting the butt, noise abatement and cost of maintenance, the torsional spring can drive clutch 4 after the circumferential direction rotates and revolve to initial position, bayonet 21 is used for inserting the dop 43 on establishing fixed needle bar 5, and then connects needle bar 5, after drive clutch 4 rotates, can make dop 43 on the needle bar 5 break away from buckle 21, the completion is to breaking away from of needle bar.

The utility model discloses a theory of operation is:

the presser foot driver 8 and the needle bar driver 31 can do reciprocating linear motion along the axial direction of the guide rod 30, the clutch structure 32 can be driven by the linkage type clutch control structure 33 to do circumferential rotation along the axial direction of the guide rod 30, further the connection or disconnection state switching between the needle bar driver 31 and the needle bar 5 is completed by the rotation of the clutch structure 32, when a lock is required to be out of work, the presser foot driver 8 is lifted upwards, the pushing part 39 on the presser foot driver 8 is abutted with the supported part 37 at the lower end of the transmission piece 36 and drives the supported part 37 to rotate, the pushing part 38 is synchronously driven to rotate in the rotation process of the supported 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 V-shaped, and when the pushing part 39 is ensured to be lifted upwards, the pushing part 38 can rotate to one end close to the needle bar driver 31, the clamping head 43 on the needle bar 5 can be separated from the buckle 21 to complete the separation of the needle bar, the needle bar 5 is not inserted, the high-speed needle bar is prevented from impacting a presser foot to damage mechanical parts, the needle bar 5 is reconnected, the needle bar 5 falls again only by rotating the clutch structure 32 to the initial position, and the needle bar 5 is driven to fall continuously by the needle bar driver 31.

The torsion spring can drive the driving clutch part 4 which rotates in the circumferential direction to rotate to the initial position.

When the clutch structure 32 rotates to the state that the needle bar 5 is connected, the limit surface 12 on the drive clutch member 4 is in butt fit with the limit body 11, so that the drive clutch member 4 can not excessively rotate in the direction opposite to the circumferential rotation direction of the drive clutch member 4, the limit of the drive clutch member 4 is realized, and the clutch structure 32 is tightly connected with the needle bar 5 in the state that the needle bar 5 is connected.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the spirit of the invention.

Although the terms of the lifting slide 1, the needle bar 5, the circumferential rotation return spring 7, the pressure foot driver 8, the pressure foot linkage portion 9, the rotation limiting structure 10, the limiting body 11, the limiting surface 12, the lock motor pushing portion 13, the bayonet 21, the guide rod 30, the needle bar driver 31, the clutch structure 32, the linkage type clutch control structure 33, the transmission mechanism 34, the machine head 35, the transmission member 36, the supported portion 37, the pushing portion 38, the pushing portion 39, the pin 40, the rotating shaft 41, the return torsion spring 42, the chuck 43, the lock transmission mechanism 52, the lock motor 53, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and should not be interpreted as imposing any additional limitations that are contrary to the spirit of the present invention.

Claims

1. A needle bar driving clutch mechanism comprises a guide rod (30) which is vertically and fixedly arranged, a presser foot driver (8) and a needle bar driver (31) are axially and movably arranged on the guide rod (30), the needle bar driver (31) and the presser foot driver (8) are arranged at intervals in the vertical direction, the needle bar driver (31) is connected with a needle bar (5) through a clutch structure (32), and the needle bar driving clutch mechanism is characterized in that a linkage type clutch control structure (33) which is powered by the presser foot driver (8) to control the action of the clutch structure (32) is arranged between the presser foot driver (8) and the needle bar driver (31).

2. The needle bar driving clutch mechanism as claimed in claim 1, wherein the needle bar driver (31) is located above the presser foot driver (8), the linkage type clutch control structure (33) controls the clutch structure (32) to act when the presser foot driver (8) is in the lifting state and the needle bar driver (31) is in the lifting state so as to enable the needle bar driver (31) and the needle bar (5) to be disengaged from each other, and the clutch structure (32) is reset after the presser foot driver (8) is lowered so as to enable the needle bar driver (31) and the needle bar (5) to be connected with each other.

3. A needle bar drive clutch mechanism as claimed in claim 1 or 2, characterized in that the linkage type clutch control structure (33) comprises a transmission mechanism (34) arranged on 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 lifting state, and the power output end of the transmission mechanism (34) acts on the needle bar driver (31).

4. A needle bar drive clutch mechanism as defined in claim 3, wherein the transmission mechanism (34) includes a transmission member (36) rotatably connected to the head (35) at a central portion thereof, the transmission member (36) is V-shaped, a supported portion (37) is provided at a lower end of the transmission member (36), a pushing portion (38) acting on the needle bar driver (31) is provided at an upper end of the transmission member (36), and a pushing portion (39) for lifting the supported portion (37) when the presser foot driver (8) is in a lifted state is provided on the presser foot driver (8).

5. The needle bar driving clutch mechanism as claimed in claim 4, wherein the lifting portion (39) is provided on the presser foot driver (8) and extends laterally, the lifting portion (39) and the presser foot driver (8) being integrally connected; the supported part (37) is fixed at the lower end of the transmission piece (36) through a pin (40) extending transversely, and the supported part (37) extends forwards; the pushing and lifting part (39) is positioned above the supported part (37), and the vertical projections of the pushing and lifting part and the supported part are mutually crossed; the pushing part (38) is cylindrical and transversely extends to the front side of the needle bar driver (31).

6. A needle bar drive clutch mechanism as claimed in claim 4, wherein the transmission member (36) is disposed on the head (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 head (35) respectively.

7. The needle bar driving clutch mechanism as claimed in claim 5, wherein the needle bar driver (31) comprises a lifting slide (1) sleeved on the guide rod (30), the lifting slide (1) and a driving clutch member (4) axially positioned and circumferentially and rotatably connected with the lifting slide, the clutch structure (32) capable of being separated from the needle bar (5) after the driving clutch member (4) circumferentially rotates is arranged between the driving clutch member (4) and the needle bar (5), a circumferentially rotating reset spring (7) capable of resetting the circumferentially rotated driving clutch member (4) so as to enable the needle bar driver (31) to be connected with the needle bar (5) again is arranged between the lifting slide (1) and the driving clutch member (4), the driving clutch member (4) is provided with a presser foot linkage part (9) axially extending along the driving clutch member (4), the pushing part (38) is in sliding contact or rolling contact with the presser foot linkage part (9).

8. A needle bar driving clutch mechanism as claimed in claim 7, characterized in that 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 part of the driving clutch member (4); the driving clutch piece (4) is further provided with a lock motor pushing portion (13), the lock motor pushing portion (13) is columnar and is arranged on the other side of the driving clutch piece (4), and two ends of the lock motor pushing portion (13) exceed the end portions of the driving clutch piece (4) respectively.

9. The needle bar driving clutch mechanism according to claim 7, wherein a rotation limiting structure (10) is arranged between the lifting slide (1) and the driving clutch member (4), the limiting direction of the rotation limiting structure (10) is opposite to the circumferential direction of the driving clutch member (4), the rotation limiting structure (10) comprises a limiting body (11) fixed on the lifting slide (1) and a limiting surface (12) arranged on the driving clutch member (4), the limiting body (11) and the limiting surface (12) are abutted against each other under the action of a circumferential rotation return 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 the needle bar driver (31) is connected with the needle bar (5).

10. A needle bar drive clutch mechanism as claimed in claim 7, wherein the drive clutch member (4) is made of plastic; the circumferential rotation return spring (7) comprises a torsion spring, one foot of the torsion spring is connected with the lifting sliding seat (1), and the other foot of the torsion spring is connected with the driving clutch piece (4); clutch structure (32) including setting up bayonet socket (21) on drive clutch spare (4) and dop (43) of setting on needle bar (5), bayonet socket (21) transversely extend and both ends link up, when drive clutch spare (4) circumferential direction dop (43) can block in or break away from bayonet socket (21).