CN111074433A - Feeding mechanism of sewing machine and sewing machine with feeding mechanism - Google Patents

Feeding mechanism of sewing machine and sewing machine with feeding mechanism Download PDF

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Publication number
CN111074433A
CN111074433A CN201911399442.7A CN201911399442A CN111074433A CN 111074433 A CN111074433 A CN 111074433A CN 201911399442 A CN201911399442 A CN 201911399442A CN 111074433 A CN111074433 A CN 111074433A
Authority
CN
China
Prior art keywords
rod
sewing machine
feeding
feed dog
main shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911399442.7A
Other languages
Chinese (zh)
Inventor
万义明
黄明学
林晓晓
洪志敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jack Sewing Machine Co Ltd
Original Assignee
Jack Sewing Machine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jack Sewing Machine Co Ltd filed Critical Jack Sewing Machine Co Ltd
Priority to CN201911399442.7A priority Critical patent/CN111074433A/en
Publication of CN111074433A publication Critical patent/CN111074433A/en
Pending legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B27/00Work-feeding means
    • D05B27/02Work-feeding means with feed dogs having horizontal and vertical movements
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B27/00Work-feeding means
    • D05B27/24Feed-dog lifting and lowering devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/14Devices for changing speed or for reversing direction of rotation
    • D05B69/18Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals

Abstract

The invention provides a feeding mechanism of a sewing machine.A main shaft driving piece can drive a cloth feeding tooth to do reciprocating translational motion relative to a needle plate; the feed dog driving part is connected to the tooth frame, the feed dog driving part can drive the feed dog to do reciprocating lifting motion relative to the needle plate, the main shaft driving part and the feed dog driving part are both connected to the controller, and the controller can control the operation of the main shaft driving part and the feed dog driving part. According to the feeding mechanism of the sewing machine, the two driving pieces respectively control the translation and lifting movement of the cloth feeding teeth, the cloth feeding teeth can form various feeding forms due to the change of the transmission speed of the main shaft driving piece and the cloth feeding teeth driving piece, sewing patterns are diversified, and the controller can coordinate the movement of the main shaft driving piece and the cloth feeding teeth driving piece to ensure normal sewing. The invention also provides a sewing machine which comprises the sewing machine feeding mechanism. The sewing machine provided by the invention has diversified sewing material patterns and wide application prospect.

Description

Feeding mechanism of sewing machine and sewing machine with feeding mechanism
Technical Field
The invention belongs to the technical field of sewing machines, and particularly relates to a feeding mechanism of a sewing machine and the sewing machine with the feeding mechanism.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The existing sewing machine main shaft driving piece drives the main shaft to rotate, and the main shaft realizes feeding by driving a feeding eccentric wheel and a feed lifting eccentric wheel; the existing sewing machine has a single feeding style and is complex to debug different sewing materials.
Disclosure of Invention
In view of the above, there is a need for a feeding mechanism of a sewing machine and a sewing machine having the feeding mechanism, which is capable of diversifying the sewing pattern of the sewing machine.
The invention provides a feeding mechanism of a sewing machine, which comprises a main shaft, a main shaft driving piece connected with the main shaft, a needle plate, a cloth feeding tooth arranged below the needle plate, a tooth frame fixedly connected with the cloth feeding tooth, and a mounting seat rotatably connected with an external shell, wherein the tooth frame is provided with a first end and a second end which are opposite,
the main shaft is connected to the first end of the tooth frame, and the main shaft driving part can drive the main shaft to rotate and drive the cloth feeding teeth to do reciprocating translational motion relative to the needle plate through the tooth frame;
the feeding mechanism of the sewing machine further comprises a feed dog driving piece, the feed dog driving piece is connected to the second end of the tooth frame, and the feed dog driving piece can drive the tooth frame to lift and drive the feed dog to do reciprocating lifting motion relative to the needle plate;
the feeding mechanism of the sewing machine further comprises an electric control element, the electric control element is connected to the mounting seat, and the electric control element can drive the mounting seat to rotate relative to the outer shell to realize backstitch;
the sewing machine feeding mechanism further comprises a controller, the main shaft driving piece and the cloth feeding tooth driving piece are connected to the controller, and the controller can control the main shaft driving piece and the cloth feeding tooth driving piece to operate.
According to the feeding mechanism of the sewing machine, the main shaft driving piece can drive the feed dog to translate relative to the needle plate through the main shaft, the feed dog driving piece can drive the feed dog to ascend or descend relative to the needle plate, the two driving pieces respectively control the translation motion and the ascending and descending motion of the feed dog, the electric control element and the mounting seat can realize backstitch, the feed dog can form various feeding forms due to the change of the transmission speed of the main shaft driving piece and the feed dog driving piece, sewing material patterns are diversified, the use range of the feeding mechanism of the sewing machine is expanded, meanwhile, the controller can control the operation of the main shaft driving piece and the feed dog driving piece, the movement of the main shaft driving piece and the feed dog driving piece is coordinated, and normal and regular sewing is guaranteed.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
In one embodiment, the feeding mechanism of the sewing machine further comprises a first transmission assembly, the first transmission assembly comprises an eccentric wheel, a swing rod and a first rotating shaft, the swing rod and the first rotating shaft respectively have a first end and a second end which are opposite,
the eccentric wheel is fixedly sleeved on the main shaft, the first end of the swing rod is movably sleeved on the eccentric wheel, the second end of the swing rod is rotatably connected to the first end of the first rotating shaft, and the second end of the first rotating shaft is connected to the first end of the dental articulator.
In one embodiment, the first transmission assembly further comprises a first connecting rod, a second connecting rod and a crank, the first connecting rod and the second connecting rod respectively have a first end and a second end which are opposite,
the mounting groove has been seted up to the mount pad, first connecting rod reaches the second connecting rod all set up in the mounting groove, the first end of first connecting rod articulates in forming the lateral wall of mounting groove, the second end of first connecting rod reaches the second end of pendulum rod all articulate in the first end of second connecting rod, the second end of second connecting rod articulate in the crank, the crank cover is established and is fixed in the first end of first pivot.
In one embodiment, the number of the first connecting rods and the number of the second connecting rods are two, the two first connecting rods are respectively hinged to two side walls which form the mounting groove and are opposite to each other, the two second connecting rods are arranged between the two first connecting rods, and the two second connecting rods clamp the swing rod.
In one embodiment, the first transmission assembly further includes a rack mount, the rack mount is sleeved on and fixed to the second end of the first rotating shaft, a transfer portion is disposed on the rack mount, and the second end of the rack is rotatably connected to the transfer portion.
In one embodiment, the feeding mechanism of the sewing machine further comprises a second transmission assembly, the second transmission assembly comprises a third connecting rod, a fourth connecting rod, a fifth connecting rod and a second rotating shaft, the third connecting rod, the fourth connecting rod, the fifth connecting rod and the second rotating shaft are respectively provided with a first end and a second end which are opposite,
the first end of the third connecting rod is fixedly connected to the output end of the feed dog driving piece, the first end of the fourth connecting rod is hinged to the second end of the third connecting rod, the first end of the fifth connecting rod is hinged to the second end of the fourth connecting rod, the second end of the fifth connecting rod is fixedly connected to the first end of the second rotating shaft, and the second end of the second rotating shaft is connected to the second end of the tooth frame.
In one embodiment, the second transmission assembly further includes a tooth lifting rocker, the tooth lifting rocker is sleeved and fixed at the second end of the second rotating shaft, the tooth lifting rocker is provided with a guide groove, and the second end of the tooth frame is slidably arranged in the guide groove.
In one embodiment, the feeding mechanism of the sewing machine further comprises a third transmission assembly, the third transmission assembly comprises a sixth connecting rod, a switching rod and a seventh connecting rod, the sixth connecting rod, the switching rod and the seventh connecting rod are respectively provided with a first end and a second end which are opposite,
the first end of the sixth connecting rod is fixedly connected with the output end of the electric control element, the adapter rod is movably sleeved on the outer shell, the first end of the adapter rod is hinged to the second end of the sixth connecting rod, the second end of the adapter rod is hinged to the first end of the seventh connecting rod, and the second end of the seventh connecting rod is hinged to the mounting seat.
In one embodiment, the feeding mechanism of the sewing machine further comprises a first encoder and a second encoder both connected to the controller,
the first encoder is connected with the main shaft driving part and can detect the rotation angle phase data and the rotation speed data of the main shaft driving part and transmit the data to the controller,
the second encoder is connected to the feed dog driving part and can detect rotation angle phase data and rotation speed data of the feed dog driving part and transmit the data to the controller.
The invention further provides a sewing machine which comprises the sewing machine feeding mechanism.
According to the sewing machine provided by the invention, the feeding mechanism of the sewing machine is arranged, so that the sewing material style of the sewing machine is diversified while the normal sewing of the sewing machine is ensured, and the sewing machine has wide application prospect
Drawings
FIG. 1 is a schematic view of a feed mechanism of a sewing machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a tooth holder in the feeder of the sewing machine shown in FIG. 1;
FIG. 3 is a schematic structural view of a portion of a feed mechanism of the sewing machine shown in FIG. 1;
FIG. 4 is a schematic structural view of another portion of the feed mechanism of the sewing machine of FIG. 1;
FIG. 5 is a schematic mechanical view of a first drive assembly of the feed mechanism of the sewing machine of FIG. 1;
FIG. 6 is an enlarged view of a portion of the first drive assembly shown in FIG. 5 at A;
FIG. 7 is a schematic structural view of an electric control assembly and a third transmission assembly in the feeder of the sewing machine shown in FIG. 1;
FIG. 8 is a schematic view of another feed dog trajectory;
FIG. 9 is a schematic view of another feed dog trajectory;
fig. 10 is a schematic view of another feed dog trajectory.
FIG. 11 is a schematic view of a mechanism of a sewing machine according to an embodiment of the present invention.
Description of reference numerals:
100. a feeding mechanism of the sewing machine; 10. a needle plate; 11. a feed dog; 12. a dental articulator; 121. a first connection portion; 122. a second connecting portion; 123. a third connecting portion; 20. a spindle assembly; 21. a main shaft driving member; 22. a main shaft; 30. a first transmission assembly; 31. an eccentric wheel; 32. a swing rod; 33. a mounting seat; 331. mounting grooves; 34. a first link; 35. a second link; 36. a crank; 37. a first rotating shaft; 38. a dental articulator mount; 381. a fixed part; 382. a switching part; 40. a feed dog driving member; 50. a second transmission assembly; 51. a third link; 52. a fourth link; 53. a fifth link; 54. a second rotating shaft; 55. a feed lifting rocker; 551. a guide groove; 56. a slider; 60. an electronic control assembly; 61. an electrical control element; 70. a third transmission assembly; 71. a sixth link; 72. a transfer lever; 73. and a seventh link.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
For the sake of simplicity and clarity of description, and to facilitate understanding of the technical solution of the present invention, the following description refers to a "first end" and a "second end" of each component or rod directly, and the component or rod is considered to have the opposite "first end" and "second end".
Referring to fig. 1 to 7, fig. 1 is a schematic structural diagram of a feeding mechanism 100 of a sewing machine according to an embodiment of the present invention; fig. 2 is a schematic structural view of a tooth holder 11 in the feeder 100 of the sewing machine shown in fig. 1; FIG. 3 is a schematic structural view of a portion of the feeding mechanism 100 of the sewing machine shown in FIG. 1; FIG. 4 is a schematic structural view of another part of the feeding mechanism 100 of the sewing machine shown in FIG. 1; FIG. 5 is a schematic mechanical view of the first drive assembly 30 of the feed mechanism 100 of the sewing machine of FIG. 1; FIG. 6 is an enlarged view of a portion of the first drive assembly 100 of FIG. 5 at A; fig. 7 is a schematic structural view of the electric control assembly 60 and the third transmission assembly 70 in the sewing machine feeder 100 shown in fig. 1.
The invention provides a feeding mechanism 100 of a sewing machine, which is arranged in the sewing machine and used for driving a feed dog 11 to translate and lift, so that the feed dog 11 has various motion forms and forms various feed tracks, thereby adapting to various sewing materials and being beneficial to diversifying sewing material styles.
The feeding mechanism of the sewing machine comprises a needle plate 10, a feed dog 11, a tooth frame 12, a main shaft component 20, a first transmission component 30, a feed dog driving component 40, a second transmission component 50 and a controller (not shown), wherein the feed dog 11 is arranged below the needle plate 10, the tooth frame 12 is connected with the feed dog 11, the main shaft component 20 is connected with the first transmission component 30, the first transmission component 30 is connected with the tooth frame 12, the feed dog driving component 40 is connected with the second transmission component 50, the second transmission component 50 is connected with the tooth frame 12, and the main shaft component 20 and the feed dog driving component 40 are connected with the controller.
The needle plate 10 is used for placing sewing materials, the feed dog 11 is used for achieving sewing material movement, the tooth frame 12 is used for driving the feed dog 11 to move, the spindle assembly 20 provides driving force for translation of the feed dog 11, the first transmission assembly 30 is used for driving the feed dog 11 to translate, the feed dog driving piece 40 provides driving force for ascending or descending of the feed dog 11, the second transmission assembly 50 is used for driving the feed dog 11 to ascend and descend, and the controller is used for controlling the spindle assembly 20 and the feed dog driving piece 40.
The dental articulator 12 comprises a first connecting portion 121, a second connecting portion 122 and a third connecting portion 123, wherein the second connecting portion 122 and the third connecting portion 123 are connected to the first connecting portion 121, the first connecting portion 121 is used for connecting the feed dog 11, the second connecting portion 122 is used for connecting the spindle assembly 20, and the third connecting portion 123 is used for connecting the feed dog driving member 40.
The first connecting portion 121 is shaped like a substantially flat plate, and the first connecting portion 121 is attached to the bottom of the feed dog 11 and fixedly connected to the feed dog 11; the second connecting portion 122 is substantially arc-shaped, and the center of the circle forming the radian of the second connecting portion 122 is located above the first connecting portion 121; the third connecting portion 123 is substantially arc-shaped, and the center of the arc forming the third connecting portion 123 is located below the first connecting portion 121.
In the present embodiment, the first connecting portion 121 is fixedly connected with the feed dog 11 by a threaded fastener, and the threaded fastener can ensure that the first connecting portion has good motion stability with the feed dog 11, so as to prevent the tooth frame 12 from loosening with the feed dog 11 and affecting the normal feeding motion of the feed dog 11; it is understood that in other embodiments, the first connecting portion 121 and the feed dog 11 may be fixed by an adhesive connection or the like, as long as the motion stability of the dental articulator 12 and the feed dog 11 can be ensured.
The main shaft assembly 20 comprises a main shaft driving part 21 and a main shaft 22, the output end of the main shaft driving part 21 is fixedly connected with the main shaft 22, the main shaft 22 is connected with other assemblies, and the machine needling, the thread picking movement and the rotating shuttle movement can be realized through other assemblies under the driving of the main shaft driving part 21.
In the embodiment, the spindle driving member 21 adopts a servo motor, and the servo motor has the advantages of accurate control, stable operation, good high-speed performance and the like; it is understood that in other embodiments, the spindle driver 21 may be selected as other elements such as a cylinder, as long as the corresponding driving force can be provided.
The first transmission assembly 30 includes an eccentric wheel 31, a swing rod 32, an installation seat 33, a first connecting rod 34, a second connecting rod 35, a crank 36, a first rotating shaft 37 and a dental articulator seat 38, the eccentric wheel 31 is fixedly sleeved on the main shaft 22, a first end of the swing rod 32 is movably sleeved on the eccentric wheel 31, the installation seat 33 is rotatably connected with an external shell (not shown), the installation seat 33 is provided with an installation groove 331, the first connecting rod 34 and the second connecting rod 35 are both arranged in the installation groove 331, a first end of the first connecting rod 34 is hinged on the installation seat 33, a second end of the first connecting rod 34 is hinged on a first end of the second connecting rod 35, a second end of the swing rod 32 is hinged on the crank 36, the crank 36 is sleeved and fixed on a first end of the first rotating shaft 37, a second end of the first rotating shaft 37 is fixedly connected to the dental articulator seat 38, and the dental articulator seat 38.
When the main shaft driving part 21 drives the main shaft 22 to rotate, the main shaft 22 drives the eccentric wheel 31 to rotate together, due to the structural characteristics of the eccentric wheel 31, the eccentric wheel 31 can drive the second end of the swing rod 32 to do surrounding motion in a certain space range through the first end of the swing rod 32, due to the hinged connection among the first connecting rod 34, the second connecting rod 35 and the mounting seat 33, the first connecting rod 34 and the second connecting rod 35 can allow the second end of the swing rod 32 to surround, the swing rod 32 drives the first rotating shaft 37 to rotate through the second connecting rod 35, the first rotating shaft 37 drives the tooth frame seat 38 to rotate, and then the tooth frame seat 38 can drive the cloth feeding tooth 11 to do horizontal reciprocating motion relative to the needle plate 10 through the second connecting part 122.
In the present embodiment, the number of the first connecting rods 34 and the second connecting rods 35 is two, based on the swing rod 32, the two first connecting rods 34 are symmetrical, the two second connecting rods 35 are symmetrical, that is, the two first connecting rods 34 are respectively hinged to the two side walls forming the opposite mounting grooves 331, the two second connecting rods 35 are both disposed between the two first connecting rods 34, the two second connecting rods 35 are correspondingly hinged to the two first connecting rods 34 one by one, and the two second connecting rods 35 are clamped and hinged to the swing rod 32, so that the connection stability of the swing rod 32, the first connecting rods 34, the second connecting rods 35 and the first rotating shaft 37 can be improved, and stable transmission is facilitated; it is understood that in other embodiments, the number of the first link 34 and the second link 35 may be other values under different working conditions, as long as the above purpose can be achieved.
The dental frame base 38 includes a fixing portion 381 and an adaptor portion 382, the fixing portion 381 is fixedly connected with the adaptor portion 382, the fixing portion 381 is substantially cylindrical, the fixing portion 381 is fixedly sleeved at the second end of the first rotating shaft 37, and the adaptor portion 382 is rotatably connected with the second connecting portion 122; when the first rotating shaft 37 drives the rack holder 38 to rotate, the adapter 382 can drive the feed dog 11 to translate relative to the needle plate 10 through the second connecting portion 122.
The spindle driving part 21 can independently control the translational motion of the feed dog 11 relative to the needle plate 10 through the spindle 22 and the first transmission assembly 30, so that the horizontal motion and the vertical motion of the feed dog 11 are separated, and the feed dog 11 can form various motion tracks conveniently.
The feed dog driving member 40 is indirectly connected to the feed dog 11 through the second transmission assembly 50. In this embodiment, the feed dog driving part 40 is a private clothes motor, so that the transmission precision is higher, and accurate sewing is facilitated; it will be appreciated that in other embodiments, feed dog drive 40 may alternatively be a stepper motor or other type of drive, as long as a corresponding driving force is provided.
The second transmission assembly 50 includes a third connecting rod 51, a fourth connecting rod 52, a fifth connecting rod 53 and a second rotating shaft 54, a first end of the third connecting rod 51 is fixedly connected to the output end of the feed dog driving member 40, a second end of the third connecting rod 51 is hinged to a first end of the fourth connecting rod 52, a second end of the fourth connecting rod 52 is hinged to a first end of the fifth connecting rod 53, a second end of the fifth connecting rod 53 is fixedly connected to a first end of the second rotating shaft 54, and a second end of the second rotating shaft 54 is connected to a third connecting portion 123 on the dental articulator 12.
The feed dog driving member 40 can drive the third connecting rod 51 to do circular motion, due to the structural characteristics of the connecting rods, the third connecting rod 51 can drive the fifth connecting rod 53 to rotate in a certain angle range in a reciprocating manner through the fourth connecting rod 52, and the fifth connecting rod 53 is fixedly connected to the second rotating shaft 54, so that the fifth connecting rod 53 can drive the second rotating shaft 54 to rotate in a certain angle range, the second rotating shaft 54 is connected with the third connecting portion 123, and the second rotating shaft 54 drives the dental articulator 12 to ascend or descend through the third connecting portion 123.
A tooth lifting rocker 55 is further arranged between the second rotating shaft 54 and the third connecting part 123, the tooth lifting rocker 55 is sleeved and fixed at the second end of the second rotating shaft 54, the tooth lifting rocker 55 is provided with a guide groove 551, and the third connecting part 123 is slidably arranged in the guide groove 551; when the second rotating shaft 54 drives the tooth lifting rocker 55 to rotate, the third connecting portion 123 can slide in the guide groove 551, and due to the shape characteristics of the third connecting portion 123, when the third connecting portion 123 is located at different positions of the guide groove 551, the corresponding tooth racks 12 are located at different heights, that is, the third connecting portion 123 can drive the feed dog 11 to ascend or descend.
The second transmission assembly 50 further comprises a slide block 56, the slide block 56 is arranged in the guide groove 551 and can slide along the guide groove 551, and the third connecting part 123 is rotatably connected with the part of the slide block 56 extending out of the guide groove 551, so that the third connecting part 123 is connected with the tooth lifting rocker 55 through the slide block 56; when the second rotating shaft 54 rotates, the feed lifting rocker 55 rotates together with the first rotating shaft 37, and the slide block 56 slides along the guide groove 551 and drives the second connecting part 122 to ascend or descend relative to the needle plate 10, so that the feed dog 11 is driven by the tooth rack 12 to reciprocate relative to the needle plate 10.
In the embodiment, the slide block 56 is attached to the side wall forming the guide groove 551, so that the slide block 56 does not shake relative to the side wall of the guide groove 551 when sliding along the guide groove 551, the transmission stability is improved, the stable movement of the feed dog 11 relative to the needle plate 10 is facilitated, and the normal feeding is further facilitated; it is understood that in other embodiments, the slider 56 may not abut the side wall of the guide groove 551, as long as the corresponding transmission relationship is achieved.
The feed dog driving part 40 can independently control the lifting motion of the feed dog 11 relative to the needle plate 10 through the second transmission assembly 50, and then is combined with the translation motion of the feed dog 11 relative to the needle, so that various motion tracks are formed, and the feed dog driving part is suitable for various sewing materials.
The feeding mechanism 100 of the sewing machine further comprises an electric control assembly 60 and a third transmission assembly 70, wherein the electric control assembly 60 is mounted on the external shell and connected with the third transmission assembly 70, the third transmission assembly 70 is connected with the mounting base 33, and the electric control assembly 60 is electrically connected with an external control center and can move under the electric control action of the external control center; the third transmission assembly 70 is used for transmitting the control action of the electric control assembly 60 to adjust the swinging angle of the mounting seat 33 relative to the outer shell.
The electronic control assembly 60 comprises an electronic control element 61, the electronic control element 61 being mounted on the outer casing and being movable under the action of an external electronic control center.
In the present embodiment, the electric control element 61 is an electromagnet, and when the external control center controls the electromagnet to be powered on, the electromagnet moves and transmits its own control action to the mounting seat 33 through the third transmission assembly 70; the installation seat 33 is controlled by utilizing the electromagnetic attraction principle, so that the cost performance is better, and the anti-interference capability to the complex environment is stronger.
It is understood that in other embodiments, the electromagnet may also adopt other electric control elements besides the electromagnet, such as an air cylinder, a hydraulic cylinder, etc.; as long as the electric control element 61 can adjust the swing angle of the mounting seat 33 relative to the outer casing through the third transmission assembly 70.
The third transmission assembly 70 adopts a link transmission structure, and is formed by hinging a plurality of transmission links. The third transmission assembly comprises a sixth connecting rod 71, an adapter rod 72 and a seventh connecting rod 73, the first end of the sixth connecting rod 71 is fixedly connected with the output end of the electric control element 61, the adapter rod 72 is approximately L-shaped, the first end of the adapter rod 72 is hinged to the second end of the sixth connecting rod 71, the corner of the adapter rod 72 is movably sleeved on the outer shell, the second end of the adapter rod 72 is hinged to the first end of the seventh connecting rod 73, and the second end of the seventh connecting rod 73 is hinged to the mounting seat 33.
It is understood that in other embodiments, the third transmission assembly 70 may also adopt other transmission methods such as a belt, a gear transmission, etc. to transmit the adjustment action of the electric control element, as long as the third transmission assembly 70 can realize the adjustment of the swing angle of the mounting seat.
Under the control of the external control center, the electric control element 61 can pull or push the sixth connecting rod 71 to move, the sixth connecting rod 71 drives the adapter rod 72 to rotate around the joint with the external shell, and pulls or pushes the seventh connecting rod 73, and the seventh connecting rod 73 drives the mounting base 33 to rotate relative to the external shell.
The arrangement of the electric control assembly 60 and the third transmission assembly 70 can realize the back feeding of the feeding mechanism 100 of the sewing machine. Referring to the direction in fig. 4, assuming that the spindle driving element 21 drives the feed dog 11 to move from left to right to forward feed, since the electronic control assembly 60 can drive the mounting seat 33 to rotate relative to the outer shell through the third transmission assembly 70, and further when reverse feed is required, the mounting seat 33 can be rotated by a certain angle, so that the mounting seat 33 reaches a position relative to forward feed, the position of the first rotating shaft 37 relative to the mounting seat 33 is changed, so that the first rotating shaft 37 rotates in a reverse direction relative to forward feed, and the feed dog 11 rotates around a phase angle to deflect relative to the forward feed phase angle, thereby realizing reverse feed.
The feeding mechanism 100 of the sewing machine further comprises a controller, wherein the main shaft driving part 21 and the feed dog driving part 40 are both connected to the controller, and the controller can control the operation of the main shaft driving part 21 and the feed dog driving part 40.
It should be noted that the above "the controller can control the operation of the spindle drive 21 and the feed dog drive 40" means that the controller can control not only the start of each drive, but also the operation speed, start timing and end timing of the spindle drive 21 and the feed dog drive 40, respectively. The controller can coordinate the main shaft driving part 21 and the cloth feeding tooth driving part 40 to ensure normal sewing.
Specifically, the main shaft driving part 21 drives the main shaft 22 to rotate for one circle, the main shaft 22 drives the cloth feeding tooth 11 to complete reciprocating translation motion and drives other components to complete sewing of one needle pitch, in the period of one needle pitch, the controller drives the cloth feeding tooth 11 motor to rotate for one time in a reciprocating mode, and the cloth feeding tooth 11 completes reciprocating lifting motion, so that the cloth feeding motion of the cloth feeding tooth 11 is completed in the period; and during this period, the spindle drive 21 can change the translation speed of the feed dog 11, and the feed dog drive 40 can change the lifting speed of the feed dog 11, thereby realizing diversification of the sewing pattern.
The feeding mechanism 100 of the sewing machine further includes a first encoder (not shown) and a second encoder (not shown), both of which are electrically connected to the controller, and the first encoder is connected to the main shaft driving member 21, and is capable of detecting the rotation angle phase and the rotation speed of the main shaft driving member, and transmitting the rotation phase angle data and the rotation speed data of the main shaft driving member 21 to the controller; the second encoder is connected to the feed dog driving member 40, and can detect the rotational angle phase and the rotational speed of the feed dog driving member 40 and transmit the rotational phase angle data and the rotational speed data of the feed dog driving member 40 to the controller.
The arrangement of the first encoder and the second encoder can respectively and accurately reflect the running states of the main shaft driving part 21 and the cloth feeding tooth driving part 40, so that the controller can conveniently and accurately coordinate the movement of the main shaft driving part 21 and the cloth feeding tooth driving part 40, and the sewing precision is improved.
Please refer to fig. 8 to 11 together, fig. 8 is a schematic diagram of a trajectory of a feed dog 11; fig. 9 is a schematic view of a feeding track of another feed dog 11; fig. 10 is a schematic view of a feeding track of another feed dog 11; fig. 11 is a schematic view of a feeding track of another feed dog 11.
In any feed dog 11 locus of fig. 8 to 11, the amounts of movement in the front-rear direction from the feed dog 11 above and below the upper surface of the needle plate 10 are constant, achieving a constant feed pitch. Therefore, the sewing machine can make the length of the stitch formed constant even if the position of the feed dog 11 higher and lower than the upper surface of the needle plate 10 is changed.
In the feeding trajectory diagram shown in fig. 9, the feeding motion of the feed dog 11 starts at a later time than the feeding trajectory diagram shown in fig. 8, that is, the feed dog 11 starts to feed the material after the main shaft driving member 21 drives and retracts a part of the thread with respect to the feeding trajectory diagram of fig. 6, and the tightness of the upper thread with respect to the thin material can be improved in the sewing mode; in the feed trajectory diagram shown in fig. 10, the feed operation of the feed dog 11 is completed earlier than the feed trajectory diagram shown in fig. 8, that is, the feed operation is completed before the needle is driven by the main shaft driving member 21 and the needle is inserted into the thick material, as compared to fig. 8, and the needle is prevented from bending and breaking when the thick material is sewn; the feed trajectory diagram 11 is similar to the feed trajectory diagram shown in fig. 8 in that the feed motion of the feed dog 11 starts later and ends earlier, and has the same advantages as the feed trajectory diagram shown in fig. 9 and the feed trajectory diagram shown in fig. 10.
It should be noted that fig. 8 to 11 only list a few feed paths of the feed dog 11, and in other embodiments, the feed tracks of the feed dog 11 in various and different types can be realized by driving the spindle driving member 21 and the feed dog driving member 40.
According to the feeding mechanism 100 of the sewing machine, the main shaft driving piece 21 can drive the feed dog 11 to translate relative to the needle plate 10 through the main shaft 22, the feed dog driving piece 40 can drive the feed dog 11 to ascend or descend relative to the needle plate 10, the two driving pieces respectively control the translation motion and the lifting motion of the feed dog 11, the change of the transmission speed of the main shaft driving piece 21 and the feed dog driving piece 40 can enable the feed dog 11 to form various feeding forms, so that sewing patterns are diversified, the use range of the feeding mechanism 100 of the sewing machine is expanded, meanwhile, the controller can control the operation of the main shaft driving piece 21 and the feed dog driving piece 40, the movement of the main shaft driving piece 21 and the feed dog driving piece 40 is coordinated, and normal and regular sewing is guaranteed.
The invention also provides a sewing machine, which comprises the sewing machine feeding mechanism 100.
According to the sewing machine provided by the invention, by arranging the feeding mechanism 100 of the sewing machine, normal sewing of the sewing machine is ensured, meanwhile, the sewing material style of the sewing machine is diversified, and the sewing machine has a wide application prospect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims (10)

1. A feeding mechanism (100) of a sewing machine comprises a main shaft (22), a main shaft driving part (21) connected with the main shaft (22), a needle plate (10), a cloth feeding tooth (11) arranged below the needle plate (10), a tooth frame (12) fixedly connected with the cloth feeding tooth (11) and a mounting seat (33) rotatably connected with an external shell, wherein the tooth frame (12) is provided with a first end and a second end which are opposite,
the main shaft (22) is connected to the first end of the tooth frame (12), and the main shaft driving part (21) can drive the main shaft (22) to rotate and drive the cloth feeding teeth (11) to do reciprocating translational motion relative to the needle plate (10) through the tooth frame (12);
the feeding mechanism (100) of the sewing machine further comprises a feed dog driving piece (40), the feed dog driving piece (40) is connected to the second end of the tooth frame (12), and the feed dog driving piece (40) can drive the tooth frame (12) to lift and drive the feed dog (11) to do reciprocating lifting motion relative to the needle plate (10);
the feeding mechanism (100) of the sewing machine further comprises an electric control element (61), the electric control element (61) is connected to the mounting seat (33), and the electric control element (61) can drive the mounting seat (33) to rotate relative to the outer shell to realize backstitch;
the sewing machine feeding mechanism (100) further comprises a controller, the main shaft driving piece (21) and the cloth feeding tooth driving piece (40) are connected to the controller, and the controller can control the main shaft driving piece (21) and the cloth feeding tooth driving piece (40) to operate.
2. The sewing machine feed mechanism (100) of claim 1, wherein the sewing machine feed mechanism (100) further comprises a first transmission assembly (30), the first transmission assembly (30) comprises an eccentric wheel (31), a swing link (32) and a first rotating shaft (37), the swing link (32) and the first rotating shaft (37) respectively have a first end and a second end which are opposite,
eccentric wheel (31) fixed cover is located main shaft (22), the first end movable sleeve of pendulum rod (32) is located eccentric wheel (31), the second end of pendulum rod (32) rotate connect in the first end of first pivot (37), the second end of first pivot (37) connect in the first end of dental articulator (12).
3. The sewing machine feed mechanism (100) of claim 2, wherein the first drive assembly (30) further comprises a first link (34), a second link (35), and a crank (36), the first link (34) and the second link (35) having first and second opposite ends, respectively,
mounting groove (331) have been seted up in mount pad (33), first connecting rod (34) and second connecting rod (35) all set up in mounting groove (331), the first end of first connecting rod (34) articulates and forms the lateral wall of mounting groove (331), the second end of first connecting rod (34) reaches the second end of pendulum rod (32) all articulate in the first end of second connecting rod (35), the second end of second connecting rod (35) articulate in crank (36), crank (36) cover is established and is fixed in the first end of first pivot (37).
4. The feeding mechanism (100) of sewing machine according to claim 3, wherein the number of the first connecting rods (34) and the second connecting rods (35) is two, the two first connecting rods (34) are respectively hinged to two opposite side walls forming the mounting groove (331), the two second connecting rods (35) are respectively arranged between the two first connecting rods (34), and the two second connecting rods (35) clamp the swing rod (32).
5. The feeding mechanism (100) of sewing machine according to claim 2, wherein the first transmission assembly (30) further comprises a rack holder (38), the rack holder (38) is sleeved and fixed on the second end of the first rotating shaft (37), an adapter portion (382) is arranged on the rack holder (38), and the second end of the rack (12) is rotatably connected to the adapter portion (382).
6. The sewing machine feed mechanism (100) of claim 1, wherein the sewing machine feed mechanism (100) further comprises a second transmission assembly (50), the second transmission assembly (50) comprising a third link (51), a fourth link (52), a fifth link (53), and a second shaft (54), the third link (51), the fourth link (52), the fifth link (53), and the second shaft (54) having first and second opposite ends,
the first end of the third connecting rod (51) is fixedly connected to the output end of the feed dog driving piece (40), the first end of the fourth connecting rod (52) is hinged to the second end of the third connecting rod (51), the first end of the fifth connecting rod (53) is hinged to the second end of the fourth connecting rod (52), the second end of the fifth connecting rod (53) is fixedly connected to the first end of the second rotating shaft (54), and the second end of the second rotating shaft (54) is connected to the second end of the dental articulator (12).
7. The feeding mechanism (100) of sewing machine according to claim 6, wherein the second transmission assembly (50) further comprises a tooth lifting rocker (55), the tooth lifting rocker (55) is sleeved and fixed at the second end of the second rotating shaft (54), the tooth lifting rocker (55) is provided with a guide groove (551), and the second end of the tooth frame (12) is slidably arranged in the guide groove (551).
8. The sewing machine feed mechanism (100) of claim 1, wherein the sewing machine feed mechanism (100) further comprises a third drive assembly (70), the third drive assembly (70) comprising a sixth link (71), an adapter rod (72), and a seventh link (73), the sixth link (71), the adapter rod (72), and the seventh link (73) each having first and second opposing ends,
the first end of the sixth connecting rod (71) is fixedly connected with the output end of the electric control element (61), the adapter rod (72) is movably sleeved on the outer shell, the first end of the adapter rod (72) is hinged to the second end of the sixth connecting rod (71), the second end of the adapter rod (72) is hinged to the first end of the seventh connecting rod (73), and the second end of the seventh connecting rod (73) is hinged to the mounting seat (33).
9. The sewing machine feed mechanism (100) of claim 1, further comprising a first encoder and a second encoder both coupled to the controller,
the first encoder is connected to the spindle driver (21), and the first encoder can detect the rotation angle phase data and the rotation speed data of the spindle driver (21) and transmit the data to the controller,
the second encoder is connected to the feed dog driving member (40), and the second encoder can detect rotational angle phase data and rotational speed data of the feed dog driving member (40) and transmit the data to the controller.
10. A sewing machine comprising a sewing machine feed mechanism, characterized in that the sewing machine feed mechanism is a sewing machine feed mechanism (100) according to any one of claims 1 to 9.
CN201911399442.7A 2019-12-30 2019-12-30 Feeding mechanism of sewing machine and sewing machine with feeding mechanism Pending CN111074433A (en)

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