CN112411043A - Needle bar self-locking mechanism - Google Patents
Needle bar self-locking mechanism Download PDFInfo
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- CN112411043A CN112411043A CN202011106004.XA CN202011106004A CN112411043A CN 112411043 A CN112411043 A CN 112411043A CN 202011106004 A CN202011106004 A CN 202011106004A CN 112411043 A CN112411043 A CN 112411043A
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- China
- Prior art keywords
- needle bar
- driver
- presser foot
- clutch
- needle
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
- D05C11/02—Machine needles
- D05C11/06—Needle-driving or control mechanisms
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C9/00—Appliances for holding or feeding the base fabric in embroidering machines
- D05C9/20—Movement of the base fabric controlled by the presser feet; Driving arrangements therefor
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to the technical field of embroidery machines, and particularly relates to a needle rod self-locking mechanism. The needle bar driving device comprises a guide rod vertically and fixedly arranged on a machine head shell, wherein 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 positioned above the presser foot driver, and the needle bar driver is connected with a needle bar through a clutch structure. The invention establishes a linkage relation between the presser foot driver and the needle bar driver, and controls the clutch structure between the needle bar driver and the needle bar by utilizing the position change of the presser foot driver so as to realize the separation and connection of the needle bar; and when the needle bar driver is separated from the needle bar, the needle bar jacking structure lifts the needle bar so as to lock the needle bar and prevent the needle bar from falling. Because the axial anti-drop structure is arranged, the needle rod can not be separated from the needle rod frame.
Description
Technical Field
The invention belongs to the technical field of embroidery machines, and relates to a needle rod self-locking mechanism.
Background
The computerized embroidery machine is the most advanced embroidery machine of the present generation, can enable the traditional manual embroidery to be realized with high speed and high efficiency, can also realize the requirements of 'multi-level, multifunction, unity and perfection' which can not be met by the manual embroidery, and is an electromechanical product which embodies various high and new technologies. The needle bar mechanism in the computerized embroidery machine is an important part, generally adopts the needle bar driver to drive the needle bar to reciprocate up and down to drop the needle, if the tapered end motor fails, the needle bar can be mistakenly dropped when the needle bar is not dropped, the position of the needle bar can not be locked, the self-locking of the needle bar is difficult to realize, and the axial dropping condition is easy to occur in the clutch switching process of the needle bar.
In order to overcome the defects of the prior art, people continuously explore and propose various solutions, for example, a needle bar mechanism of a computer embroidery machine is disclosed in a Chinese patent application number: 201620027697.6], comprises a needle bar frame, the needle bar frame comprises an upper needle bar frame and a lower needle bar frame, and the upper needle bar frame and the lower needle bar frame are fixed into a whole. According to the invention, the needle bar frame is divided into the upper needle bar frame and the lower needle bar frame, and the upper needle bar frame and the lower needle bar frame are respectively made of different materials, and particularly, the upper needle bar frame can be made of relatively low-cost materials and a simpler processing technology, so that the component cost can be effectively reduced, the component processing precision can be improved, and the service life can be prolonged. In addition, under the condition that the up-down stroke of the needle rod is not changed, the length of the needle rod is shortened, the strength of the needle rod is improved on the premise that the diameter of the needle rod is not changed, the abrasion is reduced, and the precision is improved. However, the needle bar can not be locked in position in the working process, the needle bar is difficult to be locked in a self-locking mode, and the needle bar is easy to fall off axially in the clutch switching process of the needle bar, so that other mechanical parts are damaged when the needle bar falls down.
Disclosure of Invention
The invention aims to solve the problems and provides a needle bar self-locking mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme:
a needle bar self-locking mechanism comprises a guide rod vertically and fixedly arranged on a machine head shell, 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, and the needle bar driver is positioned above the presser foot driver, the needle bar driver is connected with the needle bar through a clutch structure, a linkage type clutch control structure which is driven by the presser foot to provide power so as to control the action of the clutch structure is arranged between the presser foot driver and the needle bar driver, the needle bar axially movably penetrates through the needle bar frame, an axial anti-falling structure is arranged between the needle bar frame and the needle bar frame, a needle bar jacking structure is arranged between the needle bar and the needle bar frame, 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 needle bar jacking structure, so that the needle bar is in a position locking state.
In the needle bar self-locking mechanism, 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; 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 rod driver to control the clutch structure.
In the needle bar self-locking mechanism, the transmission mechanism comprises a transmission piece, the middle part of the transmission piece is rotatably connected with the machine head shell, the transmission piece is V-shaped, the lower end of the transmission piece is provided with a supported part, the upper end of the transmission piece is provided with a pushing part acting on the needle bar driver, and the presser foot driver is provided with a pushing part for lifting the supported part when the presser foot driver is in a lifting state; 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 self-locking mechanism, the driving medium set up on the aircraft nose casing through the pivot, the cover is equipped with the return torsional spring in the pivot, the return torsional spring be used in respectively on driving medium and aircraft nose casing.
In the needle bar self-locking mechanism, the needle bar driver comprises a lifting slide seat sleeved on the guide rod, the lifting slide seat is provided with a driving clutch piece axially positioned and circumferentially and rotatably connected with the lifting slide seat, a clutch structure capable of being separated from the needle bar after the driving clutch piece circumferentially rotates is arranged between the driving clutch piece and the needle bar, a circumferentially rotating reset spring capable of resetting the circumferentially rotated driving clutch piece 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 piece, the driving clutch piece is provided with a presser foot linkage part axially extending along the driving clutch piece, and the pushing part is in sliding contact or rolling contact with the presser foot linkage part.
In the needle bar self-locking mechanism, the presser foot linkage part is columnar and is arranged at one side of the driving clutch part, and two ends of the presser foot linkage part respectively exceed the end part of the driving clutch part.
In foretell needle bar self-locking mechanism, the opposite side of drive separation and reunion piece be equipped with motor promotion portion, the both ends of motor promotion portion surpass the tip of drive separation and reunion piece respectively, be equipped with motor pushing mechanism in the outside of motor promotion portion, 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 promotion portion sliding contact or rolling contact.
In the needle bar self-locking mechanism, 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; the lift slide and the drive separation and reunion piece between be equipped with and rotate limit structure, the spacing direction of rotation limit structure opposite with the circumferential direction of drive separation and reunion piece, rotation limit structure including fix the spacing body on the lift slide and set up the spacing face on the drive separation and reunion piece, spacing body and spacing face support each other under circumferential direction reset spring's effect and lean on each other, and when spacing body and spacing face support each other and lean on the time the separation and reunion structure be in needle bar driver and needle bar continuous state.
In the needle bar self-locking mechanism, 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 pushing part of the motor; the drive clutch is made of plastic.
In the needle bar self-locking mechanism, 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 invention has the advantages that:
1. the invention establishes a linkage relation between the presser foot driver and the needle bar driver, and controls the clutch structure between the needle bar driver and the needle bar by utilizing the position change of the presser foot driver so as to realize the separation and connection of the needle bar; and when the needle bar driver is separated from the needle bar, the needle bar jacking structure lifts the needle bar so as to lock the needle bar and prevent the needle bar from falling. Because the axial anti-drop structure is arranged, the needle rod can not be separated from the needle rod frame.
2. The invention can carry out circumferential limit on the driving clutch piece, when the needle rod clutch structure rotates to the state of connecting the needle rods, the limit surface on the driving clutch piece is abutted and matched with the limit body, so that the driving clutch piece can not excessively rotate towards the direction opposite to the circumferential rotation direction of the driving clutch piece, the limit on the driving clutch piece is realized, and the clutch structure is tightly connected with the needle rods in the state of connecting the needle rods.
3. According to the invention, by arranging the rod body and the rolling body, when the driving clutch member continues to rotate in the counterclockwise direction after recovering the initial state, the motor is started, the rotating shaft of the motor drives the swing arm, the rod body and the rolling body to rotate, so that the rolling body is abutted against the pushing part of the motor, the continuous counterclockwise rotation of the pushing part of the motor is avoided, and the limiting effect is achieved.
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 diagram 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 aspect of the present invention.
In the figure: the device comprises a lifting slide seat 1, a driving clutch piece 4, a needle rod 5, a circumferential rotation reset spring 7, a pressure foot driver 8, a pressure foot linkage part 9, a rotation limiting structure 10, a limiting body 11, a limiting surface 12, a tapered end motor pushing part 13, a bayonet 21, a guide rod 30, a needle rod driver 31, a clutch structure 32, a linkage type clutch control structure 33, a transmission mechanism 34, a machine head shell 35, a transmission piece 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, an axial anti-falling structure 50, a compression spring 51, a motor pushing mechanism 52, a motor 53, a swing arm 54, a push rod 55, a rod body 56 and a rolling body.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in the figures 1-4 of the drawings,
a needle bar self-locking mechanism, which comprises a guide rod 30 vertically and fixedly arranged on a machine head shell 35, a presser foot driver 8 and a needle bar driver 31 are axially 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, and the needle bar driver 31 is positioned above the presser foot driver 8, the needle bar driver 31 is connected with the needle bar 5 through a clutch structure 32, a linkage type clutch control structure 33 which is powered by the presser foot driver 8 so as to control the action of the clutch structure 32 is arranged between the presser foot driver 8 and the needle bar driver 31, the needle bar 5 axially movably penetrates through the needle bar frame, an axial anti-falling structure 50 is arranged between the needle bar frame and the needle bar frame, a needle bar lifting structure is arranged between the needle bar 5 and the needle bar frame, 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 needle bar lifting structure so as to enable the needle bar 5 to be in a position locking state. The needle bar jacking structure adopts a compression spring 51 sleeved on the needle bar 5; the axial retaining structure 50 is a stopper fixed to the needle bar 5. Specifically, 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 mechanism 32 is in a state of separating the needle bar driver 31 from the needle bar 5, the needle bar 5 is lifted by the compression spring 51 so as to enable the needle bar 5 to be in a position locking state.
In this embodiment, 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 linkage type clutch control structure 33 can drive the clutch structure 32 to do 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 dropped, the high-speed needle bar is prevented from impacting the presser foot, mechanical parts are prevented from being damaged, the needle bar 5 is reconnected and the needle bar 5 is allowed to drop again only by rotating the clutch structure 32 to the initial position, the needle bar 5 is driven to continuously drop through the needle bar driver 31, the axial anti-dropping structure 50 can prevent the needle bar 5 from being penetrated in, the compression spring 51 is used for connecting the needle bar 5, and ensures that the needle bar 5 is lifted by the compression spring 51 when the clutch structure 32 is in a state that the needle bar driver 31 is separated from the needle bar 5, so that the needle bar 5 is in a position locking state, and the self-locking of the needle bar is completed.
As shown in fig. 1-4, 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 disengage 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; 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 a lifting state, and the power output end of the transmission mechanism 34 acts on the needle rod driver 31 to control the clutch structure 32.
In this embodiment, after the presser foot driver 8 is lifted upwards, the linkage type clutch control structure 33 is driven to rotate, the clutch structure 32 is driven to rotate through the abutting action between the linkage type clutch control structure 33 and the clutch structure 32, so that the needle bar driver 31 and the needle bar 5 are mutually separated, the separation of the needle bar 5 is completed, the needle bar 5 is ensured not to be dropped, the high-speed needle bar is prevented from impacting the presser foot and damaging mechanical parts, when the needle bar 5 needs to be reconnected and the needle bar 5 falls again, only the presser foot driver 8 is required to be lowered to the initial position and the clutch structure 32 is reset, the clutch structure 32 and the needle bar 5 are reconnected, the needle bar 5 is continuously driven to fall through the needle bar driver 31, when the presser foot driver 8 is lifted upwards, the transmission mechanism 34 is driven to rotate through the abutting action between the presser foot driver 8 and the, and transmits the rotating force 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 makes circumferential rotation along the axial center direction of the guide rod 30, and the separation between the needle bar driver 31 and the needle bar 5 is completed.
As shown in fig. 2, the transmission mechanism 34 includes a transmission member 36 rotatably connected to the head housing 35 at the middle, the transmission member 36 is V-shaped, a supported portion 37 is provided at the lower end of the transmission member 36, a pushing portion 38 acting on the needle bar driver 31 is provided at the 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; 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 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, when the presser foot driver 8 is lifted upwards, the pushing 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, the pushing part 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 during the rotation of the supported part 37, so as to complete the separation between the needle bar driver 31 and the needle bar 5, the transmission member 36 is V-shaped, so as to ensure that the pushing part 38 can rotate towards one end close to the needle bar driver 31 when the pushing part 39 is lifted upwards, the pushing part 39 is arranged on the presser foot driver 8 and extends transversely, the supported part 37 extends forwards, the pushing part 39 is arranged above the supported part 37 and the vertical projections of the two intersect with each other, and this arrangement ensures that the pushing part 39 always abuts against the supported part 37 during the lifting process and drives the supported part 37 to rotate, the pushing part 38 can be synchronously driven to rotate towards one end close to the needle bar driver 31 in the rotation process of the supported part 37, and the pushing part 38 is cylindrical and transversely extends to the front side of the needle bar driver 31, so that the pushing part 38 can be always in an abutting state with the needle bar driver 31 in the rotation process.
As shown in fig. 1 and 2, the transmission member 36 is disposed on the handpiece housing 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 handpiece housing 35 respectively.
In this embodiment, the transmission member 36 is disposed on the head housing 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. 2, the needle bar driver 31 includes a lifting slide base 1 sleeved on the 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 can not be inserted into the needle, 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 can not be inserted into the needle, the high-speed needle rod is prevented from impacting the presser foot, mechanical parts are damaged, 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. 1 and 4, the presser foot linkage part 9 is columnar and disposed at one side of the driving clutch member 4, two ends of the presser foot linkage part 9 respectively exceed the end of the driving clutch member 4, the other side of the driving clutch member 4 is provided with a motor pushing part 38, two ends of the motor pushing part 38 respectively exceed the end of the driving clutch member 4, a motor pushing mechanism 52 is disposed at the outer side of the motor pushing part 38, the motor pushing mechanism 52 comprises a motor 53 fixed on the handpiece housing 35, an output shaft of the motor 53 is fixed with a swing arm 54, an outer end of the swing arm 54 is fixed with a push rod 55, and the push rod 55 is in sliding contact or rolling contact with the motor pushing part 38.
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 piece 4, so that the tapered end motor can always keep a linkage state with the tapered end motor pushing part 13. The lock motor and the lock transmission mechanism connected with the lock motor 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 lock motor 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 rod driver 31 and the needle rod 5, thereby further improving the control stability and the use flexibility.
In addition, when it is necessary to avoid driving the clutch member 4 to continue to rotate in the counterclockwise direction after returning to the initial state, the motor 53 is started, and the rotating shaft of the motor 53 drives the swing arm 54 and the push rod 55 to rotate, so that the push rod 55 abuts against the motor pushing portion 38, and the continuous counterclockwise rotation of the motor pushing portion 38 is avoided, thereby achieving a limiting effect.
As shown in fig. 3, the pushing portion 38 is located at the front side of the presser foot linkage portion 9, and the push rod 55 is located at the rear side of the motor pushing portion 38; lifting slide 1 and drive clutch 4 between be equipped with and rotate limit structure 10, the spacing direction of rotation limit structure 10 opposite with the circumferential direction of drive clutch 4, rotation limit structure 10 including fix spacing body 11 on lifting slide 1 and set up spacing face 12 on drive clutch 4, spacing body 11 and spacing face 12 support each other under the effect of circumferential direction reset spring 7 and lean on, and support each other when spacing body 11 and spacing face 12 support each other clutch structure 32 be in needle bar driver 31 and the continuous state of 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. 3, the push rod 55 includes a rod 56 and a rolling body 57 rotatably connected to an outer end of the rod 56, and the rolling body 57 contacts the motor pushing part 38; the drive clutch 4 is made of plastic.
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, when needs avoid drive clutch 4 to continue to rotate towards anticlockwise after resuming initial condition, starter motor 53, the axis of rotation through motor 53 drives swing arm 54 and the body of rod 56 and rolling element 57 and rotates for rolling element 57 and motor promotion portion 38 butt, avoid continuing to rotate towards motor promotion portion 38 anticlockwise, play limiting displacement.
As shown in fig. 1 and 3, the circumferential return spring 7 comprises a torsion spring, one leg of the torsion spring is connected with the lifting slide carriage 1, and the other leg of the torsion spring is connected with the driving clutch member 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, the torsion spring can drive the driving clutch member 4 after the circumferential rotation to rotate to the initial position, the bayonet 21 is used for inserting the chuck 43 on the fixed needle bar 5, and then the needle bar 5 is connected, and after the driving clutch member 4 rotates, the chuck 43 on the needle bar 5 can be separated from the bayonet 21, and the separation of the needle bar is completed.
The working principle of the invention is as follows:
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, 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.
When it is necessary to avoid driving clutch 4 to continue to rotate in the counterclockwise direction after returning to the initial state, motor 53 is started, and rotating shaft of motor 53 drives swing arm 54, rod body 56 and rolling element 57 to rotate, so that rolling element 57 abuts against motor pushing portion 38, and avoids continuing to rotate in the counterclockwise direction toward motor pushing portion 38, thereby achieving a limiting effect.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention.
Although the terms of the lifting slide 1, the driving clutch 4, the needle bar 5, the circumferential rotation return spring 7, the presser foot driver 8, the presser 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 handpiece housing 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 axial anti-dropping structure 50, the compression spring 51, the motor pushing mechanism 52, the motor 53, the swing arm 54, the push rod 55, the rod body 56, the rolling body 57, 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 they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.
Claims (10)
1. A needle bar self-locking mechanism comprises a guide rod (30) vertically and fixedly arranged on a 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), 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 positioned above the presser foot driver (8), the needle bar driver (31) is connected with a needle bar (5) through a clutch structure (32), the needle bar self-locking mechanism is characterized in that a linkage type clutch control structure (33) which is powered by the presser foot driver (8) to control the clutch structure (32) to act is arranged between the presser foot driver (8) and the needle bar driver (31), the needle bar (5) axially and movably penetrates through a needle bar frame, and an axial anti-falling structure (50) is arranged between the needle bar frame and the needle bar frame, a needle bar jacking structure is arranged between the needle bar (5) and the needle bar frame, 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 needle bar jacking structure so as to enable the needle bar (5) to be in a position locking state.
2. The needle bar self-locking mechanism according to claim 1, characterized in that 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 separate the needle bar driver (31) and the needle bar (5) from each other, and the clutch structure (32) is reset after the presser foot driver (8) is lowered so as to connect the needle bar driver (31) and the needle bar (5) with each other; 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 a lifting state, and the power output end of the transmission mechanism (34) acts on the needle rod driver (31) to control the clutch structure (32).
3. The needle bar self-locking mechanism according to claim 2, characterized in that the transmission mechanism (34) comprises a transmission member (36) rotatably connected to the head housing (35) at the middle part, 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) for 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 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 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).
4. A needle bar self-locking mechanism as claimed in claim 3, wherein the transmission member (36) is disposed on the head housing (35) via a rotation shaft (41), and a return torsion spring (42) is sleeved on the rotation shaft (41), the return torsion spring (42) acting on the transmission member (36) and the head housing (35), respectively.
5. The needle bar self-locking mechanism according to claim 3 or 4, characterized in that 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, a 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 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 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).
6. A needle bar self-locking mechanism as claimed in claim 5, wherein 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).
7. The needle bar self-locking mechanism as claimed in claim 6, wherein a motor pushing portion (38) is disposed on the other side of the driving clutch member (4), two ends of the motor pushing portion (38) respectively exceed the end portions of the driving clutch member (4), a motor pushing mechanism (52) is disposed on the outer side of the motor pushing portion (38), the motor pushing mechanism (52) includes a motor (53) fixed to the machine head housing (35), a swing arm (54) is fixed to an output shaft of the motor (53), a push rod (55) is fixed to the outer end of the swing arm (54), and the push rod (55) is in sliding contact or rolling contact with the motor pushing portion (38).
8. The needle bar self-locking mechanism according to claim 7, wherein the pushing portion (38) is located at the front side of the presser foot linkage portion (9), and the push rod (55) is located at the rear side of the motor pushing portion (38); lifting slide (1) and drive clutch spare (4) between be equipped with and rotate limit structure (10), the spacing direction of rotation limit structure (10) opposite with the circumferential direction of drive clutch spare (4), rotation limit structure (10) including fixing spacing body (11) on lifting slide (1) and setting spacing face (12) on drive clutch spare (4), spacing body (11) and spacing face (12) support each other under the effect of circumferential direction reset spring (7) and support and lean on each other, and support and lean on when spacing body (11) and spacing face (12) support each other clutch structure (32) be in needle bar driver (31) and needle bar (5) continuous state.
9. The needle bar self-locking mechanism as claimed in claim 7, wherein 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 (38); the driving clutch piece (4) is made of plastic.
10. The needle bar self-locking mechanism according to claim 5, characterized in that the circumferential return spring (7) comprises a torsion spring, one leg of the torsion spring is connected with the lifting slide carriage (1), and the other leg of the torsion spring is connected with the driving clutch member (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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011106004.XA CN112411043B (en) | 2020-10-15 | 2020-10-15 | Needle bar self-locking mechanism |
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|---|---|---|---|
| CN202011106004.XA CN112411043B (en) | 2020-10-15 | 2020-10-15 | Needle bar self-locking mechanism |
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| CN112411043B CN112411043B (en) | 2022-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116103851A (en) * | 2022-12-14 | 2023-05-12 | 浙江兆山机电有限公司 | Embroidery machine presser foot needle bar control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116103851A (en) * | 2022-12-14 | 2023-05-12 | 浙江兆山机电有限公司 | Embroidery machine presser foot needle bar control device |
| CN116103851B (en) * | 2022-12-14 | 2024-05-07 | 浙江兆山机电有限公司 | Embroidery machine presser foot needle bar control device |
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| CN112411043B (en) | 2022-04-12 |
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