WO2021135199A1

WO2021135199A1 - Sewing machine feeding mechanism and sewing machine having sewing machine feeding mechanism

Info

Publication number: WO2021135199A1
Application number: PCT/CN2020/105402
Authority: WO
Inventors: 万义明; 黄明学; 林晓晓; 洪志敏
Original assignee: 杰克缝纫机股份有限公司
Priority date: 2019-12-30
Filing date: 2020-07-29
Publication date: 2021-07-08
Also published as: CN111074433A; CN111074433B

Abstract

A sewing machine feeding mechanism (100). A main shaft driving member (21) can drive a feed dog (11) to do reciprocating translational motion relative to a needle plate (10); a feed dog driving member (40) is connected to a feed dog rack (12), and the feed dog driving member (40) can drive the feed dog (11) to do reciprocating raising motion relative to the needle plate (10); the main shaft driving member (21) and the feed dog driving member (40) are both connected to a controller; and the controller can control operation of the main shaft driving member (21) and the feed dog driving member (40). The two driving members of the sewing machine feeding mechanism (100) respectively control translational and lifting motion of the feed dog (11), changes of the transmission speeds of the main shaft driving member (21) and the feed dog driving member (40) can make the feed dog (11) form multiple cloth feeding forms, so that sewing material styles are diversified, and the controller can coordinate motion of the main shaft driving member (21) and the feed dog driving member (40) to ensure normal sewing. Provided is a sewing machine comprising the sewing machine feeding mechanism (100). The sewing material styles of the sewing machine are diversified, and the sewing machine has broad application prospects.

Description

Feeding mechanism of sewing machine and sewing machine with the mechanism

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on December 30, 2019, the application number is 201911399442.7, and the invention title is "sewing machine feeding mechanism and sewing machine with the mechanism", the entire content of which is incorporated herein by reference Applying.

Technical field

The invention belongs to the technical field of sewing machines, and in particular relates to a sewing machine feeding mechanism and a sewing machine with the mechanism.

Background technique

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The main shaft driving part of the existing sewing machine drives the main shaft to rotate, and the main shaft realizes feeding by driving the feeding eccentric wheel and the tooth lifting eccentric wheel; the existing sewing machine has a single feeding style and complex debugging for different sewing materials.

Summary of the invention

In view of this, it is necessary to provide a sewing machine feeding mechanism and a sewing machine with the mechanism, aiming to diversify sewing machine sewing patterns.

The present invention provides a feeding mechanism for a sewing machine, comprising a main shaft, a main shaft driving member connected to the main shaft, a needle plate, a feed dog arranged below the needle plate, a tooth frame fixedly connected to the feed dog, and A mounting seat rotatably connected to the outer shell, the tooth frame has a first end and a second end opposite to each other,

The main shaft is connected to the first end of the tooth frame, and the main shaft driving member can drive the main shaft to rotate and drive the cloth feed dog to make a reciprocating translational movement relative to the needle plate through the tooth frame;

The feeding mechanism of the sewing machine further includes a feeding dog driving member connected to the second end of the bracket, and the feeding dog driving member can drive the bracket up and down and drive the feeding dog. The cloth tooth performs a reciprocating lifting movement relative to the needle plate;

The feeding mechanism of the sewing machine further includes an electric control element connected to the mounting base, and the electric control element can drive the mounting base to rotate relative to the outer casing to realize reverse seam;

The feeding mechanism of the sewing machine further includes a controller, the main shaft driving part and the feeding dog driving part are both connected to the controller, and the controller can control the main shaft driving part and the feeding dog driving part Operation.

In the feeding mechanism of the sewing machine provided by the present invention, the main shaft driving member can drive the feeding dog to move relative to the needle plate through the main shaft, the feeding dog driving member can drive the feeding dog to rise or fall relative to the needle plate, and the two driving members respectively control the feeding teeth. Translation movement and lifting movement, the electronic control element and the mounting seat can realize the reverse stitching, the change of the transmission speed of the spindle drive and the feed dog drive can make the feed dog form a variety of feeding forms, thereby making the sewing material style diversified and enlarged The use range of the sewing machine's feeding mechanism, and the controller can control the operation of the spindle drive and the feed dog drive, so as to coordinate the movement of the spindle drive and the feed dog drive to ensure normal and regular sewing.

Several alternative methods are also provided below, but they are not intended as additional limitations to the above-mentioned overall scheme. They are merely further additions or optimizations. Without technical or logical contradiction, each alternative method can be carried out separately for the above-mentioned overall scheme. Combination can also be a combination of multiple alternatives.

In one of the embodiments, the sewing machine feeding mechanism further includes a first transmission assembly, the first transmission assembly includes an eccentric, a swing rod, and a first rotating shaft, and the swing lever and the first rotating shaft are opposite to each other. The first and second ends of

The eccentric wheel is fixedly sleeved on the main shaft, the first end of the pendulum rod is movably sleeved on the eccentric wheel, and the second end of the pendulum rod is rotatably connected to the first end of the first shaft, The second end of the first rotating shaft is connected to the first end of the bracket.

In one of the embodiments, the first transmission assembly further includes a first connecting rod, a second connecting rod, and a crank, and the first connecting rod and the second connecting rod have opposite first ends and first ends, respectively. Two ends,

The mounting seat is provided with a mounting groove, the first connecting rod and the second connecting rod are both arranged in the mounting groove, and the first end of the first connecting rod is hinged to the side forming the mounting groove Wall, the second end of the first link and the second end of the pendulum rod are both hinged to the first end of the second link, and the second end of the second link is hinged to the crank , The crank is sleeved and fixed to the first end of the first rotating shaft.

In one of the embodiments, the number of the first connecting rod and the second connecting rod are both two, and the two first connecting rods are respectively hinged to two opposite side walls forming the mounting groove , The two second connecting rods are both arranged between the two first connecting rods, and the two second connecting rods sandwich the swing rod.

In one of the embodiments, the first transmission assembly further includes a tooth frame seat, the tooth frame seat is sleeved and fixed to the second end of the first rotating shaft, and the tooth frame seat is provided with an adapter Part, the second end of the bracket is rotatably connected to the adapter part.

In one of the embodiments, the sewing machine feeding mechanism further includes a second transmission assembly, and the second transmission assembly includes a third connecting rod, a fourth connecting rod, a fifth connecting rod, and a second rotating shaft. The connecting rod, the fourth connecting rod, the fifth connecting rod and the second rotating shaft respectively have opposite first and second ends,

The first end of the third link is fixedly connected to the output end of the feed dog driving member, the first end of the fourth link is hinged to the second end of the third link, and the first end of the fourth link is hinged to the second end of the third link. The first end of the five link is hinged to the second end of the fourth link, the second end of the fifth link is fixedly connected to the first end of the second shaft, and the second end of the second shaft The two ends are connected to the second end of the tooth frame.

In one of the embodiments, the second transmission assembly further includes a tooth-lifting rocker, the tooth-lifting rocker is sleeved and fixed to the second end of the second shaft, and the tooth-lifting rocker is provided with A guide groove, the second end of the tooth frame is slidably arranged in the guide groove.

In one of the embodiments, the sewing machine feeding mechanism further includes a third transmission assembly, and the third transmission assembly includes a sixth link, an adapter rod, and a seventh link. The sixth link, the Both the adapter rod and the seventh connecting rod have opposite first and second ends,

The first end of the sixth link is fixedly connected to the output end of the electronic control element, the adapter rod is movably sleeved on the outer shell, and the first end of the adapter rod is hinged to the The second end of the sixth link, the second end of the transfer rod is hinged to the first end of the seventh link, and the second end of the seventh link is hinged to the mounting seat.

In one of the embodiments, the sewing machine feeding mechanism further includes a first encoder and a second encoder that are both connected to the controller,

The first encoder is connected to the spindle driving part, and the first encoder can detect the rotation angle phase data and the rotation speed data of the spindle driving part and transmit the data to the controller,

The second encoder is connected to the feeding dog driving member, and the second encoder can detect the rotation angle phase data and the rotation speed data of the feeding dog driving member and transmit the data to the controller.

The present invention also provides a sewing machine, which includes the above-mentioned sewing machine feeding mechanism.

The sewing machine provided by the present invention is provided with the above-mentioned sewing machine feeding mechanism to ensure the normal sewing of the sewing machine, while diversifying the sewing material patterns of the sewing machine, and has a wide range of application prospects.

Description of the drawings

Fig. 1 is a schematic structural diagram of a feeding mechanism of a sewing machine in an embodiment of the present invention;

Figure 2 is a schematic diagram of the structure of the tooth frame in the feeder of the sewing machine shown in Figure 1;

Figure 3 is a schematic structural view of part of the structure in the feeding mechanism of the sewing machine shown in Figure 1;

4 is a schematic structural view of another part of the structure of the feeding mechanism of the sewing machine shown in FIG. 1;

Figure 5 is a schematic view of the mechanism of the first transmission assembly in the feeding mechanism of the sewing machine shown in Figure 1;

Fig. 6 is a partial enlarged view of A in the first transmission assembly shown in Fig. 5;

FIG. 7 is a schematic diagram of the structure of the electric control component and the third transmission component of the sewing machine feeder shown in FIG. 1;

Figure 8 is a schematic diagram of another feed dog trajectory;

Figure 9 is a schematic diagram of another feed dog trajectory;

Figure 10 is a schematic diagram of another feed dog trajectory;

Fig. 11 is a schematic view of the mechanism of a sewing machine in an embodiment of the present invention.

Description of reference signs:

100. Feeding mechanism of sewing machine; 10. Needle plate; 11. Feed dog; 12. Thread frame; 121. First connection part; 122. Second connection part; 123. Third connection part; 20. Spindle assembly; 21. Main shaft drive part; 22, main shaft; 30, first transmission assembly; 31, eccentric wheel; 32, swing rod; 33, mounting seat; 331, mounting groove; 34, first connecting rod; 35, second connecting rod; 36 37. The first rotating shaft; 38. The bracket seat; 381. The fixed part; 382. The adapter part; 40. The feeder drive part; 50. The second transmission assembly; 51. The third connecting rod; 52. The fourth connecting rod; 53, the fifth connecting rod; 54, the second shaft; 55, the rocker for lifting teeth; 551, the guide groove; 56, the sliding block; 60, the electronic control component; 61, the electronic control element; 70, the first Three transmission components; 71, the sixth connecting rod; 72, the transfer rod; 73, the seventh connecting rod.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that when a component is referred to as being "installed on" another component, it can be directly installed on the other component or a centered component may also exist. When a component is considered to be "installed on" another component, it can be directly installed on another component or a centered component may exist at the same time. When a component is considered "fixed" to another component, it can be directly fixed to the other component or there may be a centered component at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or/and" as used herein includes any and all combinations of one or more related listed items.

In order to make the description more concise and clear, and to facilitate the understanding of the technical solution of the present invention, the following involves directly describing the "first end" and "second end" of each part or rod, and it is considered that the part or rod has a relative " "First End" and "Second End".

Please refer to Figures 1 to 7. Figure 1 is a schematic structural diagram of a sewing machine feeding mechanism 100 in an embodiment of the present invention; Figure 2 is a structural schematic diagram of the tooth frame 11 in the sewing machine feeder 100 shown in Figure 1; Figure 3 is a diagram 1 shows a schematic structural view of a part of the sewing machine feeding mechanism 100; Figure 4 is a structural schematic view of another part of the sewing machine feeding mechanism 100 shown in FIG. 1; FIG. 5 is a first transmission assembly 30 in the sewing machine feeding mechanism 100 shown in FIG. Fig. 6 is a partial enlarged view of A in the first transmission assembly 100 shown in Fig. 5; Fig. 7 is a schematic structural diagram of the electronic control assembly 60 and the third transmission assembly 70 in the sewing machine feeder 100 shown in Fig. 1.

The present invention provides a sewing machine feeding mechanism 100, which is arranged in a sewing machine and is used to drive the translation and lifting of the feeding dog 11, so that the feeding dog 11 has a variety of motion forms and forms a variety of cloth feeding trajectories, thereby adapting to a variety of Sewing material is conducive to diversification of sewing material styles.

The feeding mechanism of the sewing machine includes a needle plate 10, a feeding dog 11, a dog frame 12, a spindle assembly 20, a first transmission assembly 30, a feeding dog driving part 40, a second transmission assembly 50 and a controller (not shown). The tooth 11 is arranged under the needle plate 10, the tooth frame 12 is connected with the feeding dog 11, the main shaft assembly 20 is connected with the first transmission assembly 30, the first transmission assembly 30 is connected with the tooth frame 12, and the feeding tooth drive part 40 is connected to the second transmission assembly 50, the second transmission assembly 50 is connected to the bracket 12, and the main shaft assembly 20 and the feed dog driving member 40 are both connected to the controller.

The needle plate 10 is used to place the sewing material, the feeding dog 11 is used to realize the movement of the sewing material, the bracket 12 is used to drive the feeding dog 11 to move, the spindle assembly 20 provides driving force for the translation of the feeding dog 11. The first transmission assembly 30 is used to drive the feeding dog 11 to translate, the feeding dog driving member 40 provides driving force for the raising or lowering of the feeding dog 11, the second transmission assembly 50 is used to drive the feeding dog 11 up and down, and the controller is used to control the spindle assembly 20 And the feed dog driving member 40.

The bracket 12 includes a first connecting portion 121, a second connecting portion 122, and a third connecting portion 123. The second connecting portion 122 and the third connecting portion 123 are both connected to the first connecting portion 121, and the first connecting portion 121 is used for The feeding dog 11 is connected, the second connecting portion 122 is used for connecting the main shaft assembly 20, and the third connecting portion 123 is used for connecting the feeding dog driver 40.

The shape of the first connecting portion 121 is generally flat, the first connecting portion 121 is attached to the bottom of the feeding dog 11 and fixedly connected to the feeding dog 11; the shape of the second connecting portion 122 is generally arc-shaped and forming a second connection The center of the arc of the part 122 is above the first connecting part 121; the shape of the third connecting part 123 is roughly arc-shaped, and the center of the arc forming the third connecting part 123 is below the first connecting part 121.

In this embodiment, the first connecting part 121 and the feeding dog 11 are fixedly connected by threaded fasteners. The use of threaded fasteners can make the first connecting part and the feeding dog 11 have good motion stability and prevent The tooth frame 12 and the feed dog 11 are loose and affect the normal feeding movement of the feed dog 11; it is understood that in other embodiments, the first connecting portion 121 and the feed dog 11 may also be connected by adhesive, etc. The method is fixed, as long as the motion stability of the bracket 12 and the feeding dog 11 can be ensured.

The spindle assembly 20 includes a spindle drive 21 and a spindle 22. The output end of the spindle drive 21 is fixedly connected to the spindle 22, and the spindle 22 is connected with other components. Then, under the drive of the spindle drive 21, the needle can be realized by other components. Puncture material, thread take-up movement and hook movement.

In this embodiment, the spindle drive 21 adopts a servo motor, which has the advantages of precise control, stable operation and good high-speed performance; it is understood that in other embodiments, the spindle drive 21 can also be selected as other components such as air cylinders. , As long as it can provide the corresponding driving force.

The first transmission assembly 30 includes an eccentric wheel 31, a pendulum rod 32, a mounting seat 33, a first connecting rod 34, a second connecting rod 35, a crank 36, a first rotating shaft 37 and a bracket seat 38. The eccentric wheel 31 is fixedly sleeved on The first end of the main shaft 22 and the pendulum rod 32 is movably sleeved on the eccentric wheel 31, the mounting seat 33 is rotatably connected with the outer casing (not shown), the mounting seat 33 is provided with a mounting groove 331, the first connecting rod 34 is connected to the second connecting rod 34 The connecting rods 35 are all arranged in the mounting groove 331, the first end of the first connecting rod 34 is hingedly connected to the mounting seat 33, the second end of the first connecting rod 34 is hingedly connected to the first end of the second connecting rod 35, and the swing rod The second end of 32 is hingedly connected to the crank 36, the crank 36 is sleeved and fixed to the first end of the first rotating shaft 37, the second end of the first rotating shaft 37 is fixedly connected to the tooth holder 38, and the tooth holder 38 is connected to the tooth holder 12 on the second connection part 122.

When the spindle drive 21 drives the spindle 22 to rotate, the spindle 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 a certain Doing orbiting movement within the space range, due to the hinged connection between the first link 34, the second link 35 and the mounting seat 33, the first link 34 and the second link 35 can allow the second end of the swing rod 32 to perform The swing rod 32 drives the first rotating shaft 37 to rotate through the second connecting rod 35, and the first rotating shaft 37 drives the carrier base 38 to rotate, and the carrier base 38 can drive the feed dog 11 to the needle plate through the second connecting portion 122 10 Do horizontal reciprocating movements.

In this embodiment, the number of the first link 34 and the number of the second link 35 are both two. Taking the pendulum rod 32 as a reference, the two first links 34 are symmetrical, and the two second links 35 are symmetrical. , That is, 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 both arranged between the two first connecting rods 34, and the two second connecting rods 35 and the two first connecting rods 34 are hinged in one-to-one correspondence, and the two second connecting rods 35 are clamped and hinged to the swing rod 32. This arrangement can improve the swing rod 32, the first connecting rod 34, and the second connecting rod 35. The connection stability of the first shaft 37 and the first rotating shaft 37 is conducive to stable transmission; it can be understood that in other embodiments, under different working conditions, the number of the first connecting rod 34 and the second connecting rod 35 can also be other values, as long as The above-mentioned purpose can be achieved.

The bracket base 38 includes a fixing portion 381 and an adapter portion 382, the fixing portion 381 is fixedly connected to the adapter portion 382, the shape of the fixing portion 381 is substantially cylindrical, and the fixing portion 381 is fixedly sleeved on the second end of the first rotating shaft 37, The adapter portion 382 is rotatably connected with the second connecting portion 122; and when the first rotating shaft 37 drives the bracket base 38 to rotate, the adapter portion 382 can drive the feed dog 11 to translate relative to the needle plate 10 through the second connecting portion 122.

The spindle drive 21 can individually control the translational movement of the feed dog 11 relative to the needle plate 10 through the spindle 22 and the first transmission assembly 30, and separate the horizontal and vertical movement of the feed dog 11, facilitating the formation of a variety of feed dogs 11 Movement trajectory.

The feeding dog driving member 40 is indirectly connected to the feeding dog 11 through the second transmission assembly 50. In this embodiment, the feeding dog driving member 40 is a private server motor, so that the transmission accuracy is higher, which is conducive to precise sewing; it is understandable that in other embodiments, the feeding dog driving member 40 can also be selected as a stepping motor Or other types of driving parts, as long as the corresponding driving force can be 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. The first end of the third connecting rod 51 is fixedly connected to the output end of the feed dog driving member 40 , The second end of the third link 51 is hinged to the first end of the fourth link 52, the second end of the fourth link 52 is hinged to the first end of the fifth link 53, and the second end of the fifth link 53 The two ends are 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 third connecting portion 123 on the bracket 12.

The feed dog driver 40 can drive the third link 51 to make a circular motion. Due to the structural characteristics of the link, the third link 51 can drive the fifth link 53 to reciprocate in a certain angle range through the fourth link 52. Since the fifth connecting rod 53 is fixedly connected to the second rotating shaft 54, the fifth connecting rod 53 can drive the second rotating shaft 54 to rotate within a certain angle range. The second rotating shaft 54 is connected to the third connecting portion 123, and the second rotating shaft 54 The third connecting portion 123 drives the tooth frame 12 to rise or fall.

A tooth lifting rocker 55 is also provided between the second rotating shaft 54 and the third connecting portion 123. The tooth lifting rocker 55 is sleeved and fixed to the second end of the second rotating shaft 54. The tooth lifting rocker 55 is provided with a guide groove 551. The third connecting portion 123 is slidably disposed 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. Due to the shape characteristics of the third connecting portion 123, When the third connecting portion 123 is at different positions of the guiding groove 551, the corresponding bracket 12 is at a different height, that is, the third connecting portion 123 will drive the feeding dog 11 to rise or fall.

The second transmission assembly 50 also includes a slider 56 which is arranged in the guide groove 551 and can slide along the guide groove 551, and the third connecting portion 123 is rotatably connected with the part of the slider 56 that extends out of the guide groove 551, so as to realize the first The three connecting portion 123 is connected to the lifting rocker 55 through the slider 56; and when the second rotating shaft 54 rotates, the lifting rocker 55 rotates together with the first rotating shaft 37, and the sliding block 56 slides along the guide groove 551 and drives the second connection The portion 122 rises or falls relative to the needle plate 10, so that the carrier 12 drives the feeding dog 11 to make a reciprocating lifting movement relative to the needle plate 10.

In this embodiment, the slider 56 is attached to the side wall of the guide groove 551, so that when the slider 56 slides along the guide groove 551, the slider 56 will not shake relative to the side wall of the guide groove 551, which improves the transmission. Stability is conducive to the stable movement of the feeding dog 11 relative to the needle plate 10, and is further conducive to normal feeding; it is understood that in other embodiments, the slider 56 may not be attached to the side wall of the guide groove 551, as long as the corresponding The transmission relationship is sufficient.

The feeding dog driving member 40 can individually control the lifting movement of the feeding dog 11 relative to the needle plate 10 through the second transmission assembly 50, and then combine with the translational movement of the feeding dog 11 relative to the needle, thereby forming a variety of motion trajectories, suitable for many Kind of sewing material.

The sewing machine feeding mechanism 100 further includes an electric control assembly 60 and a third transmission assembly 70. The electric control assembly 60 is installed on the outer shell and connected with the third transmission assembly 70. The third transmission assembly 70 is connected with the mounting base 33. The control assembly 60 is electrically connected to the external control center, and can move under the electric control of the external control center; the third transmission assembly 70 is used to transmit the control action of the electronic control assembly 60 to adjust the swing angle of the mounting seat 33 relative to the external housing .

The electric control assembly 60 includes an electric control element 61, which is mounted on an outer casing and can move under the action of an external electric control center.

In this embodiment, the electric control element 61 adopts an electromagnet. When the external control center controls the electromagnet to be energized, the electromagnet moves and transmits its control action to the mounting seat 33 through the third transmission assembly 70; The principle control mounting seat 33 has a better cost performance, and has a strong anti-interference ability against complex environments.

It can be understood that, in other embodiments, the electromagnet may also use other electronic control elements other than electromagnets, such as air cylinders, hydraulic cylinders, etc.; as long as the electronic control element 61 can adjust the mounting seat 33 relative to the outside through the third transmission assembly 70 The swing angle of the shell is sufficient.

The third transmission assembly 70 adopts a connecting rod transmission structure, which is formed by hinged connection of a plurality of transmission connecting rods. The third transmission assembly includes a sixth link 71, an adapter rod 72 and a seventh link 73. The first end of the sixth link 71 is fixedly connected to the output end of the electronic control element 61, and the shape of the adapter rod 72 is approximately "L" shape, the first end of the adapter rod 72 is hinged to the second end of the sixth link 71, the corner of the adapter rod 72 is movably sleeved on the outer shell, and the second end of the adapter rod 72 is hinged to The first end of the seventh link 73 and the second end of the seventh link 73 are hinged to the mounting seat 33.

It can be understood that in other embodiments, the third transmission assembly 70 can also adopt other transmission methods such as conveyor belts, gear transmissions, etc. to transmit the adjustment action of the electronic control element, as long as the third transmission assembly 70 can realize the swing angle of the mounting seat. Just adjust.

Under the control of the external control center, the electronic control element 61 can pull or push the sixth link 71 to move, and the sixth link 71 drives the adapter rod 72 to rotate around the connection with the external housing, and pull or push the seventh link. The rod 73 and the seventh connecting rod 73 drive the mounting seat 33 to rotate relative to the outer casing.

The arrangement of the electronic control assembly 60 and the third transmission assembly 70 can realize the reverse feeding of the sewing machine feeding mechanism 100. Referring to the direction in FIG. 4, assuming that the main shaft driving member 21 drives the feed dog 11 to move from left to right for positive feeding, since the electronic control assembly 60 can drive the mounting seat 33 to rotate relative to the outer housing through the third transmission assembly 70, and then when needed When feeding backwards, the mounting seat 33 can be rotated to a certain angle so that the mounting seat 33 reaches a position opposite to the forward feeding, and 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 the opposite direction relative to the forward feeding. The revolving phase angle of the cloth tooth 11 is deflected relative to the positive feeding phase angle, thereby realizing reverse feeding.

The feeding mechanism 100 of the sewing machine further includes a controller. The main shaft driving member 21 and the feeding dog driving member 40 are both connected to the controller, and the controller can control the operation of the main shaft driving member 21 and the cloth feeding dog driving member 40.

It is worth noting that the aforementioned "controller can control the operation of the spindle drive 21 and the feed dog drive 40" not only means that the controller can control the activation of each drive, but also that the controller can control the spindle drive 21 and The operating speed, start time, and end time of the feed dog driver 40. The controller can coordinate the spindle drive 21 and the feed dog drive 40 to ensure normal sewing.

Specifically, the main shaft driving member 21 drives the main shaft 22 to rotate for one revolution, and the main shaft 22 drives the feed dog 11 to complete the reciprocating translation movement, and drives other components to complete the sewing of one stitch length. During the period of one stitch length, the controller drives the feeder. The cloth dog 11 motor reciprocates once, and the cloth feed dog 11 completes the reciprocating lifting movement, so as to complete the cloth feeding movement of the cloth dog 11 during this period; and during this period, the spindle drive 21 can change the translation of the cloth dog 11 Speed, the feeding dog driving member 40 can change the lifting speed of the feeding dog 11, thereby realizing the diversification of sewing material styles.

The sewing machine feeding mechanism 100 also includes a first encoder (not shown) and a second encoder (not shown). Both the first encoder and the second encoder are electrically connected to the controller, while the first encoder is connected to the spindle The driving part 21 can detect the rotation angle phase and the rotation speed of the spindle driving part, and transmit the rotation phase angle data and the rotation speed data of the spindle driving part 21 to the controller; the second encoder is connected to the feeding dog driving part 40, It can detect the rotation angle phase and the rotation speed of the feed dog driver 40, and transmit the rotation phase angle data and the rotation speed data of the feed dog driver 40 to the controller.

The settings of the first encoder and the second encoder can accurately reflect the operating status of the spindle drive 21 and the feed dog drive 40, respectively, so as to facilitate the controller to accurately coordinate the movement of the spindle drive 21 and the feed dog drive 40. Thereby improving the sewing accuracy.

Please also participate in Figure 8 to Figure 11, Figure 8 is a schematic diagram of the trajectory of a feeding dog 11; Figure 9 is a schematic diagram of another feeding trajectory of the feeding dog 11; Figure 10 is a schematic diagram of another feeding trajectory of the feeding dog 11; FIG. 11 is a schematic diagram of another feeding trajectory of the feeding dog 11.

In the arbitrary feed dog 11 trajectory of FIGS. 8 to 11, the movement amount of the feed dog 11 above and below the upper surface of the needle plate 10 in the front and rear direction is constant, so that the feed pitch is constant. Therefore, even if the sewing machine changes the position of the feed dog 11 above and below the upper surface of the needle plate 10, the stitch length formed in the sewing material can be made constant.

Among them, the feeding trajectory diagram shown in FIG. 9 is compared with the feeding trajectory diagram shown in FIG. 8, the conveying action of the feed dog 11 is started later, that is, relative to the feeding trajectory, the spindle drive 21 drives a part of the stitches. After that, the feed dog 11 starts to convey the sewing material. This sewing mode can make the upper thread tightness relative to the thin material good; the feeding trajectory diagram shown in Figure 10 is compared with the feeding trajectory diagram shown in Figure 8. The conveying action of the tooth 11 should be finished early, that is, compared to Fig. 8, the spindle drive 21 drives the piercing material, and the sewing needle completes the feeding action before piercing the sewing material. This sewing mode can prevent the needle from sewing thick materials. The bending and breaking; the feeding trajectory diagram 11, compared with the feeding trajectory diagram shown in FIG. 8, the conveying action of the feeding dog 11 starts later and ends earlier, with the feeding trajectory diagram shown in FIG. 9 and FIG. 10 The feed trajectory diagram shown has the same advantages.

It is worth noting that FIGS. 8 to 11 only list a few of the feeding trajectories of the feed dog 11. In other embodiments, the spindle drive 21 and the feed dog drive 40 can be driven to achieve a variety of And different styles of feeding dog 11 feeding track.

In the feeding mechanism 100 of the sewing machine provided by the present invention, the spindle drive 21 can drive the feed dog 11 to translate relative to the needle plate 10 through the spindle 22, and the feed dog drive 40 can drive the feed dog 11 to rise or fall relative to the needle plate 10. The driving parts respectively control the translational movement and lifting motion of the feeding dog 11, and the change of the transmission speed of the main shaft driving part 21 and the feeding dog driving part 40 can make the feeding dog 11 form a variety of feeding forms, thereby making the sewing material style diversified. Expand the use range of the sewing machine feeding mechanism 100. At the same time, the controller can control the operation of the spindle drive 21 and the feed dog drive 40, so as to coordinate the movement of the spindle drive 21 and the feed dog drive 40 to ensure normal and regular sewing .

The present invention also provides a sewing machine, which includes the above-mentioned sewing machine feeding mechanism 100.

The sewing machine provided by the present invention is provided with the above-mentioned sewing machine feeding mechanism 100 to ensure the normal sewing of the sewing machine, and at the same time, diversify the sewing material patterns of the sewing machine, and have a wide range of application prospects.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention, as long as appropriate changes are made to the above embodiments within the essential spirit of the present invention. And the changes fall within the scope of protection of the present invention.

Claims

A feeding mechanism (100) of a sewing machine, comprising a main shaft (22), a main shaft driving member (21) connected to the main shaft (22), a needle plate (10), and a cloth feeding arranged below the needle plate (10) Tooth (11), a tooth frame (12) fixedly connected to the feeding dog (11), and a mounting seat (33) rotatably connected to the outer shell, the tooth frame (12) has opposite first ends And the second end, which is characterized by,

The spindle (22) is connected to the first end of the tooth frame (12), and the spindle drive member (21) can drive the spindle (22) to rotate and drive the transmission through the tooth frame (12). The cloth tooth (11) performs a reciprocating translational movement relative to the needle plate (10);

The sewing machine feeding mechanism (100) further includes a feeding dog driving member (40), the feeding dog driving member (40) is connected to the second end of the bracket (12), and the feeding dog driving member (40) It can drive the tooth frame (12) up and down and drive the feed dog (11) to make a reciprocating lifting movement relative to the needle plate (10);

The sewing machine feeding mechanism (100) further includes an electric control element (61), the electric control element (61) is connected to the mounting base (33), and the electric control element (61) can drive the mounting base ( 33) Rotate relative to the outer casing to realize reverse seam;

The sewing machine feeding mechanism (100) also includes a controller, and the main shaft driving member (21) and the cloth feeding dog driving member (40) are both connected to the controller, and the controller can control the main shaft driving (21) and the operation of the feed dog drive (40).
The sewing machine feeding mechanism (100) according to claim 1, wherein the sewing machine feeding mechanism (100) further comprises a first transmission assembly (30), and the first transmission assembly (30) comprises an eccentric wheel (31) ), a pendulum rod (32) and a first shaft (37), the pendulum rod (32) and the first shaft (37) have opposite first and second ends, respectively,

The eccentric wheel (31) is fixedly sleeved on the main shaft (22), the first end of the pendulum rod (32) is movably sleeved on the eccentric wheel (31), and the first end of the pendulum rod (32) The two ends are rotatably connected to the first end of the first rotating shaft (37), and the second end of the first rotating shaft (37) is connected to the first end of the bracket (12).
The sewing machine feeding mechanism (100) according to claim 2, wherein the first transmission assembly (30) further comprises a first connecting rod (34), a second connecting rod (35) and a crank (36), The first connecting rod (34) and the second connecting rod (35) have opposite first and second ends, respectively,

The mounting seat (33) is provided with a mounting groove (331), the first connecting rod (34) and the second connecting rod (35) are both arranged in the mounting groove (331), and the first The first end of the connecting rod (34) is hingedly connected to the side wall forming the mounting groove (331), and the second end of the first connecting rod (34) and the second end of the swing rod (32) are both hinged At the first end of the second connecting rod (35), the second end of the second connecting rod (35) is hinged to the crank (36), and the crank (36) is sleeved and fixed to the The first end of the first shaft (37).
The sewing machine feeding mechanism (100) according to claim 3, wherein the number of the first connecting rod (34) and the second connecting rod (35) are both two, and the two first The connecting rods (34) are respectively hinged to two opposite side walls forming the mounting groove (331), and the two second connecting rods (35) are both arranged between the two first connecting rods (34) , And the two second connecting rods (35) sandwich the swing rod (32).
The sewing machine feeding mechanism (100) according to claim 2, wherein the first transmission assembly (30) further comprises a tooth frame seat (38), and the tooth frame seat (38) is sleeved and fixed to the On the second end of the first rotating shaft (37), an adapter part (382) is provided on the tooth frame seat (38), and the second end of the tooth frame (12) is rotatably connected to the adapter part ( 382).
The sewing machine feeding mechanism (100) according to claim 1, wherein the sewing machine feeding mechanism (100) further comprises a second transmission assembly (50), and the second transmission assembly (50) comprises a third connecting rod (51), the fourth link (52), the fifth link (53) and the second shaft (54), the third link (51), the fourth link (52), and the fifth link ( 53) and the second rotating shaft (54) have opposite first and second ends, respectively,

The first end of the third link (51) is fixedly connected to the output end of the feed dog driving member (40), and the first end of the fourth link (52) is hinged to the third link The second end of the rod (51), the first end of the fifth link (53) is hinged to the second end of the fourth link (52), and the second end of the fifth link (53) The end 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 bracket (12).
The sewing machine feeding mechanism (100) according to claim 6, characterized in that the second transmission assembly (50) further comprises a tooth lifting rocker (55), and the tooth lifting rocker (55) is sleeved and fixed At the second end of the second 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) within.
The sewing machine feeding mechanism (100) according to claim 1, wherein the sewing machine feeding mechanism (100) further comprises a third transmission assembly (70), and the third transmission assembly (70) comprises a sixth connecting rod (71), the adapter rod (72) and the seventh link (73), the sixth link (71), the adapter rod (72) and the seventh link (73) all have opposite The first end and the second end,

The first end of the sixth link (71) is fixedly connected to the output end of the electronic control element (61), the adapter rod (72) is movably sleeved on the outer housing, and the adapter The first end of the rod (72) is hinged to the second end of the sixth link (71), and the second end of the adapter rod (72) is hinged to the first end of the seventh link (73). The second end of the seventh link (73) is hinged to the mounting seat (33).
The sewing machine feeding mechanism (100) according to claim 1, wherein the sewing machine feeding mechanism further comprises a first encoder and a second encoder that are both connected to the controller,

The first encoder is connected to the spindle drive (21), and the first encoder can detect the rotation angle phase data and the rotation speed data of the spindle drive (21) and transmit the data to the control Device,

The second encoder is connected to the feeding dog driving member (40), and the second encoder can detect the rotation angle phase data and the rotation speed data of the feeding dog driving member (40) and transmit the data To the controller.
A sewing machine comprising a sewing machine feeding mechanism, characterized in that the sewing machine feeding mechanism is the sewing machine feeding mechanism (100) according to any one of claims 1 to 9.