CN109355814B

CN109355814B - Cloth feeding tooth rack adjusting method

Info

Publication number: CN109355814B
Application number: CN201811377286.XA
Authority: CN
Inventors: 宋国庆; 郭红华; 赵林蔚; 徐永明
Original assignee: Jack Sewing Machine Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2021-03-30
Anticipated expiration: 2038-11-19
Also published as: CN109355814A

Abstract

The invention provides a cloth feeding tooth rack adjusting method, which is applied to an overedging machine and is used for adjusting the inclination angle and the height of the cloth feeding tooth rack in the overedging machine, the overedging machine comprises an operating component and an adjusting component, the adjusting component comprises an eccentric shaft and an adjusting slide block, the eccentric shaft penetrates through the adjusting slide block and is connected with the operating component, the adjusting slide block is embedded on the cloth feeding tooth rack, and the cloth feeding tooth rack adjusting method comprises the following steps: operating the operating assembly and driving the eccentric shaft to rotate; the rotation of the eccentric shaft drives the adjusting slide block to move relative to the eccentric shaft; the inclination angle and the height of the feed dog rack are adjusted by the sliding of the adjusting slide block on the feed dog rack and the rising or falling of the adjusting slide block at one end of the feed dog rack. The overedger using the method can automatically adapt to the cloth with different thicknesses, and has wide application prospect.

Description

Cloth feeding tooth rack adjusting method

Technical Field

The invention relates to the technical field of sewing, in particular to a method for adjusting a feed dog frame.

Background

The overlock sewing machine is mainly used for serging and sewing textiles and has wide application in the field of sewing. The feeding process of the overedger is mainly realized by the reciprocating elliptical motion of the feed dog frame, and the overedger continuously jacks and pulls the cloth on the needle plate through the feed dog frame, so that the cloth to be processed is continuously dragged and conveyed to the machine head to complete the whole feeding process. However, the existing overedger can only process cloth with a specific thickness, the cloth is layered or stitches are too dense due to insufficient cloth dragging force of the cloth feeding tooth frame when thick materials are sewn, and the stitches are wrinkled due to excessive feeding when thin materials are sewn. The overedger cannot adapt to cloth with different thickness degrees, and the development and the application of the overedger are restricted.

Disclosure of Invention

In view of the above, there is a need for a feed dog adjusting method, which can simultaneously adjust the inclination angle and height of a feed dog, so as to improve the processing quality of an overedger and improve the flexible manufacturing capability of the whole system.

The invention provides a cloth feeding tooth rack adjusting method, which is applied to an overlock machine and is used for adjusting the inclination angle and the height of a cloth feeding tooth rack in the overlock machine, the overlock machine comprises an operating assembly and an adjusting assembly, the adjusting assembly comprises an eccentric shaft and an adjusting slide block, the eccentric shaft penetrates through the adjusting slide block and is connected with the operating assembly, the adjusting slide block is embedded on the cloth feeding tooth rack, and the cloth feeding tooth rack adjusting method comprises the following steps:

operating the operating assembly and driving the eccentric shaft to rotate;

the rotation of the eccentric shaft is utilized to drive the adjusting slide block to move relative to the eccentric shaft;

the inclination angle and the height of the feed dog rack are adjusted by utilizing the sliding of the adjusting slide block on the feed dog rack and the rising or falling of the adjusting slide block at one end of the feed dog rack.

Further, the operating assembly includes a control element, the control element is connected to the eccentric shaft, and the step of controlling the control element of the operating assembly to rotate and drive the eccentric shaft to rotate includes:

and controlling a control element of the operating assembly to rotate and driving the eccentric shaft to rotate.

Further, the control element is an electric control element, and the step of controlling the rotation of the control element of the operating assembly and driving the rotation of the eccentric shaft comprises:

and operating the electric control element to drive the eccentric shaft to rotate in an electric control mode.

Further, the electric control element is a motor.

Further, the overedger further comprises a thickness detection module, wherein the thickness detection module is used for detecting the thickness of the cloth, and the step of controlling the electric control element to drive the eccentric shaft to rotate in an electric control mode comprises the following steps:

the thickness detection module detects the thickness of the cloth;

and the electric control element drives the eccentric shaft to rotate by a corresponding angle according to the cloth thickness detected by the thickness detection module.

Further, the thickness detection module comprises a Hall element and a magnetic part, the Hall element and the magnetic part are mutually matched, and the thickness detection module detects the thickness of the cloth material according to the Hall principle.

Further, the thickness detection module includes at least one of an ultrasonic distance sensor, an infrared distance sensor, an optical distance sensor, and a pressure sensor.

Further, the control element is a control rod, and the step of controlling the control element of the operating assembly to rotate and drive the eccentric shaft to rotate comprises:

and the control rod is controlled to drive the eccentric shaft to rotate in a manual operation mode.

Further, the operating assembly further includes a transmission assembly disposed between the control element and the eccentric shaft, and the step of controlling the control element of the operating assembly to rotate and driving the eccentric shaft to rotate includes:

and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through a transmission assembly and drive the eccentric shaft to rotate.

Further, the transmission assembly comprises a worm wheel and a worm, the worm wheel and the worm are meshed with each other, and the step of controlling the control element to transmit the rotation of the control element to the eccentric shaft through the transmission assembly and drive the eccentric shaft to rotate comprises the following steps:

and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through the power transmission of the worm wheel and the worm and drive the eccentric shaft to rotate.

The height of the cloth feeding rack at one end is changed through the rotating matching between the eccentric shaft and the adjusting slide block, the simultaneous adjustment of the inclination angle and the height can be realized, the overedger using the method can be automatically adapted to cloth with different thicknesses, and the overedger has wide application prospect.

Drawings

FIG. 1 is a schematic structural view of an overedger applying the cloth feeding dog adjusting method provided by the invention after omitting part of the structure;

FIG. 2 is a schematic structural view of the overedger shown in FIG. 1 without the housing;

FIG. 3 is an exploded view of the overlock machine shown in FIG. 2;

FIG. 4 is a schematic structural view of the housing shown in FIG. 1;

FIG. 5 is a schematic structural view of the spindle shown in FIG. 2;

FIG. 6 is a schematic view of the presser foot mechanism shown in FIG. 2;

FIG. 7 is a schematic structural view of the cloth feeding mechanism shown in FIG. 2;

FIG. 8 is a schematic view of the cloth feeding mechanism shown in FIG. 7 from another perspective;

FIG. 9 is an exploded view of the cloth feed mechanism shown in FIG. 7;

FIG. 10 is an exploded view of a third drive assembly of the cloth feeding mechanism of FIG. 8;

FIG. 11 is a schematic structural view of a differential adjustment mechanism of the overedger shown in FIG. 2;

FIG. 12 is a schematic structural view of a feed dog adjusting mechanism in the overedger shown in FIG. 2;

FIG. 13 is a schematic structural view of the feed dog adjustment mechanism shown in FIG. 2 from another perspective;

FIG. 14 is an exploded view of the feed dog adjustment mechanism of FIG. 13;

FIG. 15a is a schematic view of the feed dog carrier in a normal operating condition;

FIG. 15b is a schematic view of the feed dog frame in a thick material working state;

FIG. 15c is a schematic view of the feed dog carrier in a thin material working state;

FIG. 16 is a schematic structural view of a feed dog adjusting mechanism of a overedger in a second embodiment to which the feed dog adjusting method of the present invention is applied;

FIG. 17 is an exploded view of the feed dog adjustment mechanism shown in FIG. 16;

fig. 18 is a schematic flow chart of a feed dog adjusting method according to an embodiment of the present invention.

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.

Referring to fig. 1 and 3, fig. 1 is a schematic structural view of an overedger 100 with a partial structure omitted, fig. 2 is a schematic structural view of the overedger 100 shown in fig. 1 without a shell 10, and fig. 3 is an exploded schematic view of the overedger 100 shown in fig. 2. The overedger 100 is mainly used for the serging and sewing of textiles, has wide application in industrial and home sewing, and is an extremely important and precise sewing machine.

The overedger 100 applying the feed dog carrier adjusting method provided by the invention comprises a shell 10, a main shaft 20, a presser foot mechanism 30, a feed mechanism 40 and a machine head (not shown), wherein the main shaft 20 is arranged inside the shell 10 and is connected with the feed mechanism 40 and the machine head, the presser foot mechanism 30, the feed mechanism 40 and the machine head are all arranged on the shell 10, and the presser foot mechanism 30 is opposite to the feed mechanism 40 and is arranged close to the machine head.

The shell 10 is used for bearing a main shaft 20, a presser foot mechanism 30, a cloth feeding mechanism 40 and a machine head, the main shaft 20 is connected to a power source (not shown) and can drive the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head to operate under the driving of the power source, the presser foot mechanism 30 is used for pressing cloth conveyed by the cloth feeding mechanism 40 so as to improve the quality of sewing processing, the cloth feeding mechanism 40 is used for conveying the cloth to be processed, and the machine head is used for sewing the cloth conveyed by the cloth feeding mechanism 40. The main shaft 20 drives the cloth feeding mechanism 40 to convey the cloth in a reciprocating manner, and then the press foot mechanism 30 appropriately tensions the cloth, so that the machine head can sew the cloth in a good tensioning state, and the sewing and overlocking process of the overedger 100 is completed.

Of course, in addition to the above-mentioned housing 10, the main shaft 20, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head, the overedger 100 may further be provided with auxiliary mechanisms such as a thread passing mechanism and a lubricating mechanism to smoothly complete the sewing process of the overedger, which will not be described herein again.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the housing 10 shown in fig. 1. The housing 10 is substantially box-shaped, has a complex shape to match the installation and movement of the different components in the overedger 100, and the housing 10 separates the main shaft 20, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head from the external environment, so that the internal actuator of the overedger can be protected, and the operator can be prevented from mistakenly touching the moving devices of the actuator, thereby protecting the operation safety of the operator.

The shell 10 is provided with a spindle hole 11 corresponding to the spindle 20, and the spindle hole 11 is used for installing and fixing the spindle 20; a cavity for accommodating a power source is further arranged in the housing 10, and the cavity is communicated with the spindle hole 11. The middle position of the side surface of the shell 10 is concave and forms a working space 12, and the working space 12 provides a movable area of the cloth feeding mechanism 40, so that the cloth feeding mechanism 40 can reciprocate in the area of the working space 12, and cloth is continuously fed to the machine head. The shell 10 is also provided with a needle plate 13 for sewing the cloth, the needle plate 13 is approximately a flat plate, the upper surface of the needle plate 13 is a cloth bearing surface, namely a working plane 131 for sewing and serging operation, the cloth feeding mechanism 40 reciprocates in the working space 12 in an elliptical motion, so that the cloth feeding mechanism continuously rises above the working plane 131 or falls below the working plane 131, the cloth can be dragged in the rising process of the cloth feeding mechanism 40, the position of the cloth feeding mechanism can be reset in the falling process, the cloth feeding mechanism 40 circularly reciprocates to rise and fall, and the continuous feeding process can be realized.

The outer side of the housing 10 may further be provided with an operation opening and a cover (not shown) rotatably connected to the side of the housing 10 adjacent to the operation opening, wherein the operation opening can be closed or opened by the rotation of the cover, and a part of the adjusting mechanism of the overedger 100 is disposed inside the housing 10 and adjacent to the operation opening. When the cover opens the operation opening, part of the adjustment mechanism can be exposed from the operation opening, and when the cover closes the operation opening, the part of the adjustment mechanism is also closed to the housing 10. This is done. When the overedger 100 needs to perform parameter adjustment, an operator can turn over and open the cover body, so that the internal parameter adjustment assembly is exposed, and the operator can adjust through the exposed adjustment assembly. The cover isolates part of the adjusting mechanism of the overedger 100 from the external environment, and the overedger can be better protected on the basis of meeting the adjusting requirement.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the main shaft 20 shown in fig. 2, the main shaft 20 is inserted into a main shaft hole 11 formed in the housing 10, and the main shaft 20 can rotate under the driving of a power source and drive each actuator in the overedger 100 to operate. The main shaft 20 has a central axis X, and the main shaft 20 can rotate around its own central axis X, and the position of the central axis X is fixed relative to the housing 10, that is, the main shaft 20 makes a fixed-axis rotation around the central axis X.

The main shaft 20 comprises an eccentric shaft section 21 arranged eccentrically and a transmission mechanism (not shown) connected with the eccentric shaft section 21, the rotation of the main shaft 20 can drive the eccentric shaft section 21 to perform eccentric rotation around a central axis X, and the eccentric rotation of the eccentric shaft section 21 transmits power to each execution mechanism through the transmission mechanism, so that the execution mechanisms are driven to operate; the power transmission of the eccentric shaft sections 21 on the main shaft 20 also realizes the running and coordination operation of different executing mechanisms in the overedger 100.

Referring to fig. 6, fig. 6 is a schematic structural view of the presser foot mechanism 30 shown in fig. 2, the presser foot mechanism 30 is installed in the housing 10 and is disposed corresponding to the working space 12, and the presser foot mechanism 30 is used for pressing the cloth conveyed by the cloth feeding mechanism 40, so that the cloth is in a proper tension state, thereby improving the sewing quality of the machine head.

The presser mechanism 30 includes a presser shaft 31, a presser arm 32, a presser support 33, and a presser foot plate 34, the presser shaft 31 being attached to the housing 10 to be rotatable with respect to the housing 10, one end of the presser shaft 31 being connected to the presser arm 32, the presser support 33 being provided at the other end of the presser arm 32 with respect to the presser shaft 31, and the presser foot plate 34 being provided on the presser support 33 to be rotatable with respect to the presser support 33. The presser foot shaft 31 is used for driving the presser foot arm 32 to rotate, so as to adjust the installation angle of the whole presser foot mechanism 30; the presser arm 32 is used for supporting the presser bracket 33; the presser foot bracket 33 is used to support the presser foot plate 34. The two-axis adjustment of the presser foot plate 34 is realized by the rotation of the presser foot shaft 31 and the rotation of the presser foot plate 34 relative to the presser foot bracket 33.

The machine head is arranged in a part, opposite to the working space 12, of the shell 10 and is close to the presser foot mechanism 30, the machine head can rotate under the driving of the main shaft 20, and the crank transmission controls the motion of a machine needle (not shown) and a curved needle (not shown) inside, so that the machine needle makes regular up-and-down linear motion, the curved needle makes regular reciprocating swing, and the machine head forms stitches through the mutual matching of the machine needle and the curved needle, so that the sewing and overlocking operation of textiles is completed.

Referring to fig. 7 to 8, fig. 7 is a schematic structural view of the cloth feeding mechanism 40 shown in fig. 2, and fig. 8 is a schematic structural view of the cloth feeding mechanism 40 shown in fig. 7 at another viewing angle. The cloth feeding mechanism 40 comprises two cloth feeding tooth frames 41, a first transmission component 42, a second transmission component 43 and a third transmission component 44, the number of the cloth feeding tooth frames 41 is two, and the two transmission component are respectively an active cloth feeding tooth frame 411 and a differential cloth feeding tooth frame 412, the first transmission component 42 is connected to the active cloth feeding tooth frame 411 and the differential cloth feeding tooth frame 412, and the first transmission component 42 can rotate under the driving of the spindle 20 to drive the active cloth feeding tooth frame 411 and the differential cloth feeding tooth frame 412 to do reciprocating linear motion in a first direction; the second transmission assembly 43 is disposed between the first transmission assembly 42 and the differential feed dog 412, and the second transmission assembly 43 can be driven by the first transmission assembly 42 to drive the differential feed dog 412 to perform reciprocating linear motion in a second direction; the third transmission assembly 44 is disposed between the second transmission assembly 43 and the active feed dog 411, and the third transmission assembly 44 can be driven by the second transmission assembly 43 to drive the active feed dog 411 to move linearly and reciprocally in the second direction.

In the present embodiment, the first direction is a vertical direction, and the second direction is a horizontal direction perpendicular to the vertical direction. It is understood that the first direction may also be other directions oblique to the vertical direction, and the second direction may also be other directions oblique to the horizontal direction; the first direction and the second direction can be mutually perpendicular and can also be at other angles, and the first direction and the second direction can be correspondingly arranged according to actual production needs.

The driving feed dog 411 is driven by the first transmission assembly 42 to linearly reciprocate along the first direction, driven by the second transmission assembly 43 to linearly reciprocate along the second direction, and the motions of the driving feed dog 411 in the two directions are overlapped to show a reciprocating circular motion in space.

The motion form of the differential feed dog 412 is similar to that of the active feed dog 411, the differential feed dog 412 is driven by the first transmission assembly 42 to move linearly and reciprocally along the first direction, and driven by the third transmission assembly 44 to move linearly and reciprocally along the second direction, and the motions of the differential feed dog 412 in the two directions are overlapped to show a reciprocating circular motion in space.

Since the dragging stroke of the active feed dog 411 and the differential feed dog 412 to the cloth in the second direction is often larger than the moving stroke of the feed dog 41 in the first direction, the reciprocating circular motion of the active feed dog 411 and the differential feed dog 412 has a relatively large stroke in the lateral direction, and the reciprocating circular motion of the active feed dog 411 and the differential feed dog 412 has a relatively small stroke in the first direction, so that the active feed dog 411 and the differential feed dog 412 spatially exhibit reciprocating elliptical motion.

The motion of the active feed dog 411 and the differential feed dog 412 after being higher than the working plane 131 can drag cloth, the motion after falling into the working plane 131 can reset the drag position of the active feed dog 411 and the differential feed dog 412, the reciprocating elliptical motion of the active feed dog 411 and the differential feed dog 412 can be matched with the motion of a machine head, the active feed dog 411 and the differential feed dog 412 convey the cloth into the machine head, the machine head sews the current cloth section after the active feed dog 411 and the differential feed dog 412 feed, and the feed dog 41 continues to drag the next section of cloth after the machine head finishes processing the current cloth, so that the cycle and the continuous operation are realized.

The feed dog holder 41 is provided with a feed dog 413 for dragging the cloth, the feed dog 413 can pass through the needle plate 13 under the driving of the reciprocating elliptical motion of the feed dog holder 41 and is matched with the foot pressing plate 34 in the foot pressing mechanism 30, the feed dog 413 presses the cloth by utilizing mutual abutting of the foot pressing plate 34 and the movement in the first direction, and drags the cloth by utilizing the movement in the second direction. The feed dog 413 comprises a driving dog 4131 arranged on the driving feed dog frame 411 and a differential dog 4132 arranged on the differential feed dog frame 412, the driving dog 4131 for dragging the cloth is arranged on the driving feed dog frame 411, and the driving dog 4131 is provided with a serrated surface to increase the dragging force on the cloth; the differential feed dog bracket 412 is provided with a differential tooth 4132 for dragging the cloth, and the differential tooth 4132 is also provided with a serrated surface to increase the dragging force to the cloth. The driving teeth 4131 and the differential teeth 4132 are arranged at intervals, a gap between the driving teeth 4131 and the differential teeth 4132 is used for providing a processing space of a machine head on the machine head, and the machine head on the machine head processes cloth in the gap between the driving teeth 4131 and the differential teeth 4132, so that the sewing operation is completed.

In this embodiment, the motion of the active feed dog 411 and the motion of the differential feed dog 412 in the first direction are relatively synchronous, and the motion in the second direction is asynchronous, so that the overedger 100 can obtain better sewing effect. Of course, the active feed dog 411 and the differential feed dog 412 may also be moved synchronously.

In order to ensure the stability and reliability of the active feed dog 411 and the differential feed dog 412 during the feeding process, the housing 10 is further provided with an oil baffle 414 and a guide rail 415 for matching the active feed dog 411 and the differential feed dog 412 to move, the oil baffle 414 is substantially in a shape of a Chinese character 'kou', and the active feed dog 411 and the differential feed dog 412 penetrate through a central hole of the oil baffle 414 and move within a spatial range of the central hole. It is understood that in order to ensure smooth movement of the active feed dog 411 and the differential feed dog 412, the hole diameter of the central hole of the oil baffle 414 is matched with the size and movement of the active feed dog 411 and the differential feed dog 412. Two side surfaces of the oil baffle 414 are correspondingly contacted with the active feed dog 411 and the differential feed dog 412, and the side surfaces of the oil baffle 414 can scrape lubricating oil on the active feed dog 411 and the differential feed dog 412, so that the problems of cloth pollution and the like caused by the direct contact of the flowing part soaked by the lubricating oil and cloth are avoided.

The guide rail 415 is substantially in a shape of a "concave", and is fixedly disposed at the housing 10 and nested in the active feed dog 411 and the differential feed dog 412, and the guide rail 415 is used for improving the movement stability of the active feed dog 411 and the differential feed dog 412 and preventing the motion deviation of the active feed dog 411 and the differential feed dog 412.

The active feed dog 411 and the differential feed dog 412 are further provided with a plurality of through holes (not numbered) for oil passing, so that lubricating oil can be conveniently infiltrated on the feed dog 41, the active feed dog 411 and the differential feed dog 412 can be lightened, and the weight of the whole overedger 100 can be reduced.

One end of the driving feed dog 411, which is far away from the driving teeth 4131, and one end of the differential feed dog 412, which is far away from the differential teeth 4132, both extend outwards and form two parallel extension arms 416, a sliding groove 418 extending along the length direction of the feed dog 41 is formed between the two parallel extension arms 416, and the two parallel extension arms 416 are arranged for the feed dog 41 to adjust the integral angle.

Approximately the middle positions of the active feed dog 411 and the differential feed dog 412 are provided with a "square" shaped sliding groove (not numbered), which is used for matching with the first transmission component 42, so that the first transmission component 42 drives the active feed dog 411 and the differential feed dog 412 to make a reciprocating linear motion in a first direction.

In addition, the differential feed dog 412 is further provided with a sliding groove 417 along the first direction, and the sliding groove 417 is used for allowing a part of the structure of the second transmission assembly 43 to be embedded and slide, so as to realize the reciprocating linear motion of the differential feed dog 412 in the second direction. The active feed dog bracket 411 is further provided with a through hole (not numbered) for the third transmission assembly 44 to be connected and embedded, so that the third transmission assembly 44 and the active feed dog bracket 411 are fixed to each other.

Referring to fig. 9, fig. 9 is an exploded view of the cloth feeding mechanism 40 shown in fig. 7. The first transmission assembly 42 is sleeved on the main shaft 20 and connected to the active feed dog 411 and the differential feed dog 412, and the first transmission assembly 42 is used for transmitting the kinetic energy of the main shaft 20 and driving the active feed dog 411 and the differential feed dog 412 to move back and forth along a first direction.

The first transmission assembly 42 includes a vertical driving slider 421, an eccentric 422 and a feeding link 423, the vertical driving slider 421 is used for driving the driving feed dog 411 and the differential feed dog 412 to reciprocate along a first direction, and the eccentric 422 and the feeding link 423 are mutually matched for driving the second transmission assembly 43 to operate.

The vertical driving slider 421 is substantially block-shaped, a through hole is opened at substantially the center of the vertical driving slider 421, and the vertical driving slider 421 is sleeved at one eccentric shaft section 21 of the main shaft 20 through the through hole. The vertical driving sliding block 421 is embedded in the central sliding slot of the mouth-shaped feed dog frame 41 and contacts with the inner side wall of the feed dog frame 41, and the rotation of the main shaft 20 around the central axis thereof can make the eccentric shaft section 21 perform eccentric rotation, and also drives the vertical driving sliding block 421 sleeved on the eccentric shaft section 21 to perform parallel rotation in the circumferential direction. Because the vertical driving sliding block 421 is arranged at the sliding groove formed in the inside of the feed dog frame 41, the vertical driving sliding block 421 can slide along the sliding groove under the guiding of the sliding groove in a reciprocating manner, so that the movement of the vertical driving sliding block 421 in the side direction is released by the sliding groove in the inside of the feed dog frame 41, and the vertical driving sliding block 421 only drives the feed dog frame 41 to do reciprocating linear movement in the first direction, thereby realizing the process that the main shaft 20 drives the feed dog frame 41 to do reciprocating movement in the first direction.

The eccentric wheel 422 and the feeding connecting rod 423 are sequentially sleeved on the main shaft 20, and the eccentric wheel 422 and the feeding connecting rod 423 are matched with each other to drive the second transmission assembly 43 to move, so that a power source is provided for the second transmission assembly 43 to drive the driving feed dog 411 and the differential feed dog 412 to perform reciprocating linear motion in the lateral direction. The eccentric wheel 422 is fixed on the main shaft 20 and can be driven by the main shaft 20 to rotate; one end of the feeding link 423 is sleeved on the eccentric wheel 422 and rotatably connected with the eccentric wheel 422, and the other end is connected to the second transmission assembly 43. The eccentric wheel 22 is sleeved on a straight shaft section of the main shaft 20, and due to the eccentric arrangement of the eccentric wheel 22, the rotation driving of the main shaft 20 is represented as eccentric rotation of the eccentric wheel 22 around the main shaft 20; and because the feeding connecting rod 423 is sleeved on the eccentric wheel 22, the driving action of the eccentric wheel 22 on the feeding connecting rod 423 is represented by the revolving motion of the feeding connecting rod 423, and the eccentric wheel 22 and the feeding connecting rod 423 form a crank and rocker mechanism, thereby driving the second transmission assembly 43 to swing in a reciprocating manner.

In this embodiment, the first transmission assembly 42 further includes an eccentric cam 424 and a pawl (not numbered) disposed on the eccentric cam 424, and the relative positions of the eccentric cam 22 and the feeding link 423 on the main shaft 20 are fixed by the eccentric cam 424 and the pawl; of course, the eccentric cam 424 and pawl also have the function of adjusting the actuator within the overlock machine 100 and will not be described in detail herein.

Referring to fig. 7 and 8, one end of the second transmission assembly 43 is connected to the feeding link 423 of the first transmission assembly 42, and the other end is connected to the differential feed dog 412. The second transmission assembly 43 includes a cloth feeding shaft 431, a differential cloth feeding crank 432, a connecting block 433, a cover plate 434 and a side driving slider 435, the cloth feeding shaft 431 penetrates through the differential cloth feeding crank 432 and is installed on the housing 10, and the second transmission assembly 43 can be stably installed at the housing 10 by the load of the cloth feeding shaft 431. The cloth feeding shaft 431 is further provided at both ends thereof with bushings (not numbered) through which the cloth feeding shaft 431 is fixedly mounted to the housing 10 and can rotate under the load of the housing 10.

The differential feed crank 432 is substantially "L" shaped with a portion of its short side fixed to the feed shaft 431, the remaining portion of the short side rotatably connected to the feed link 423 and the long side extending into the cavity enclosed by the link 433 and the cover 434. The differential cloth feeding crank 432 is rotatably connected to the feeding link 423 of the first transmission assembly 42, and the swinging of the feeding link 423 drives the differential cloth feeding crank 432 to rotate reciprocally. The differential cloth feeding crank 432 is further provided with a plurality of through holes on the long side part, and the through holes are used for oil passing, so that lubricating oil can well infiltrate the differential cloth feeding crank 432.

The connecting block 433 and the cover plate 434 are fixed to each other, and an opening for the long side of the differential cloth feeding crank 432 to extend into is formed by the connecting block and the cover plate; the connecting block 433 is provided with a protrusion (not numbered) protruding towards the lateral driving slider 435, a screw hole (not numbered) is formed in the corresponding position of the connecting block 433 and the cover plate 434, and the connecting block 433 and the cover plate 434 can be fixed to each other through a threaded fastener.

The lateral driving slider 435 is embedded in a sliding groove 417 formed in the differential feed dog frame 412 along the first direction, the approximate center of the lateral driving slider 435 is hollow, and the hollow part of the lateral driving slider 435 is used for embedding a protrusion on the connecting block 433, so that the connecting block 433 is rotatably connected with the lateral driving slider 435.

With the transmission of the first transmission assembly 42 to the second transmission assembly 43, the feeding link 423 is driven by the main shaft 20 to drive the differential cloth feeding crank 432 in the second transmission assembly 43 to swing back and forth, the differential cloth feeding crank 432 and the cloth feeding shaft 431 are fixed to each other, and at this time, the differential cloth feeding crank 432 and the cloth feeding shaft 431 swing back and forth in an integrated manner. The long end of the differential cloth feeding crank 432 extends into a space surrounded by the connecting block 433 and the cover plate 434, and the swinging of the differential cloth feeding crank 432 drives the connecting block 433, the cover plate 434 and the lateral driving slider 435 to swing back and forth.

Since the lateral driving slider 435 can slide in the sliding slot 417 of the differential feed dog 412, the spatial swing of the lateral driving slider 435 is respectively the reciprocating slide of the lateral driving slider 435 along the sliding slot 417 and the reciprocating linear motion of the lateral driving slider 435 in the extending direction of the vertical sliding slot 417, and since the lateral driving slider 435 is disposed on the differential feed dog 412, the reciprocating linear motion of the lateral driving slider 435 in the extending direction of the vertical sliding slot 417 drives the differential feed dog 412 to reciprocate linearly in the lateral direction perpendicular to the first direction, so as to realize the process that the second transmission assembly 43 drives the differential feed dog 412 to reciprocate linearly in the lateral direction under the driving of the first transmission assembly 42.

By opening the slot 417, the movement of the lateral drive slider 435 in the first direction is released, and the lateral drive slider 435 only transmits its movement in the lateral direction to the differential feed dog 412. It should be noted that the swing angle of the differential feed crank 432 is released by the rotational connection between the lateral drive block 435 and the connecting block 433, so as to avoid the interference of the differential feed crank 432 with its movement due to its inability to rotate.

Referring to fig. 10, fig. 10 is an exploded view of the third driving assembly 44 of the cloth feeding mechanism 40 shown in fig. 8. The third transmission assembly 44 includes an active cloth feeding crank 441, a connecting rod 442 and a connecting rod sleeve 443, the active cloth feeding crank 441 is sleeved on the cloth feeding shaft 431 and rotatably connected with the connecting rod 442, the connecting rod 442 is disposed between the connecting rod sleeve 443 and the active cloth feeding crank 441, one end of the connecting rod 442 is embedded by a connecting member (not numbered) disposed on the active cloth feeding crank 441, the other end of the connecting rod 442 is embedded by the connecting rod sleeve 443, and the connecting rod sleeve 443 penetrates through one end of the connecting rod 442 and is fixed on the active cloth feeding dental frame 411, so that the third transmission assembly 44 and the active cloth feeding crank 441 are connected with each other.

The active feeding crank 441 has an arc-shaped sliding slot (not numbered) extending in a first direction, a connecting pin (not numbered) is embedded in the sliding slot for connecting one end of the connecting rod 442, the active feeding crank 441 is connected to the connecting rod 442 via the connecting pin, and the active feeding crank 441 releases a motion component in the first direction via the connecting rod 442, so that a resultant motion of the active feeding crank 441 in a vertical direction and a lateral direction only transmits the lateral motion to the active feeding rack 411.

The opposite ends of the connecting rod 442 are provided with through holes, one of which is used for the connecting rod sleeve 443 to be inserted, and the other is used for the connecting pin on the active cloth feeding crank 441 to be inserted. The connecting rod 442 is capable of driving the active feed dog 411 to reciprocate linearly in a lateral direction perpendicular to the first direction under the driving action of the active feed crank 441 and the connecting action of the connecting rod sleeve 443.

The feed shaft 431 connects the active feed dog 411 and the differential feed dog 412, so that the motion sources of the active feed dog 411 and the differential feed dog 412 are consistent, and only the initial positions or the lengths of the structures in the second transmission assembly 43 and the third transmission assembly 44 need to be adjusted, so that the active feed dog 411 and the differential feed dog 412 have different motion tracks and are kept flush in the vertical position.

The main shaft 20 drives the active feed dog 411 and the differential feed dog 412 to reciprocate in the first direction and the lateral direction, so that the driving sources of the active feed dog 411 and the differential feed dog 412 are the same, the synchronization of the motion forms of the active feed dog 411 and the differential feed dog 412 is favorably kept, and the problem that the vertical motion and the lateral motion are not synchronous due to the fact that a plurality of driving sources respectively drive the active feed dog 411 and the differential feed dog 412 to move is avoided.

Of course, if the synchronization problem is not considered, the elliptical motions of the active feed dog 411 and the differential feed dog 412 may be achieved by driving the respective drive sources.

Referring to fig. 11, fig. 11 is a schematic structural diagram of the differential adjusting mechanism 50 of the overedger 100 shown in fig. 2. In order to realize the adjustment of the differential amount between the active feed dog 411 and the differential feed dog 412 in the overedger 100, a differential amount adjusting mechanism 50 is further disposed in the overedger 100, the differential amount adjusting mechanism 50 includes an adjusting rod 51, a differential crank 52 and a differential connecting piece 53, one end of the differential connecting piece 53 is pivoted to the differential crank 52, the other end is connected to the cover plate 434 in the second transmission assembly 43, one end of the differential crank 52 is connected to the adjusting rod 51, and the adjustment rod 51 can swing, adjust and rotate and drive the differential connecting piece 53 to move. One end of the adjusting rod 51 is fixedly connected to the differential crank 52, and the adjusting rod 51 adjusts the positional relationship of the differential link 53 by changing its own angle.

The adjusting rod 51 rotates around the connecting point of the adjusting rod 51 and the differential crank 52 under the adjustment of an operator, the rotation of the adjusting rod 51 drives the differential crank 52 fixedly connected with the adjusting rod to rotate, and the rotation of the differential crank 52 drags the differential connecting piece 53 to move. Since the differential link plate 53 is rotatably connected to the cover plate 434 of the second transmission assembly 43, the differential link plate 53 is driven by the differential crank 52 to rotate around the cover plate 434 and slide integrally with the cover plate 434 along the sliding slot 417. Under the driving of the differential connecting piece 53, the position of the lateral driving slider 435 fixedly connected with the connecting block 433 and the cover plate 434 in the sliding groove 417 is changed, so that the initial movement position of the lateral driving slider 435 is changed, and as the decomposition of the actual movement of the lateral driving slider 435 in the lateral direction, the movement state of the differential feed dog frame 412 is changed, thereby realizing the adjustment of the difference between the active feed dog frame 411 and the differential feed dog frame 412.

In order to further improve the convenience of the differential adjustment, the differential adjustment mechanism 50 further includes an adjustment panel 54 disposed outside the housing 10, the adjustment panel 54 is provided with a sliding slot (not numbered), the adjustment rod 51 is fixedly connected with a sliding block (not numbered) disposed in the sliding slot, the sliding block is fixedly provided with an adjustment piece 541, and an operator can adjust the swing position of the adjustment rod 51 by operating the adjustment piece 541, thereby facilitating the operation of the operator.

Further, status indicators such as dials may be provided on the adjustment panel 54 to facilitate visualization and quantification of the adjustment differential.

Further, the differential adjustment mechanism 50 is further provided with a fixed shaft 521 on the differential crank 52, and the fixed shaft 521 is fixedly arranged inside the housing 10 and fixedly connected with the adjustment rod 51 through a shaft position screw 522. By providing the fixed shaft 521, the differential crank 52 can be stably provided on the housing 10, and the shaft screw 522 can also reliably connect the differential crank 52 and the adjustment lever 51, thereby further improving the reliability and stability of the operation of the overedger 100.

Referring to fig. 12 to 14, fig. 12 is a schematic structural view of a feed dog adjusting mechanism 60 of the overedger 100 shown in fig. 2 in the first embodiment, fig. 13 is a schematic structural view of the feed dog adjusting mechanism 60 shown in fig. 12 from another view, and fig. 14 is an exploded schematic view of the feed dog adjusting mechanism 60 shown in fig. 13. The existing overedger can only process cloth with specific thickness in the process of realizing sewing operation, and has poor sewing effect on cloth with other thickness ranges. In order to improve the adaptability to the cloth with different thicknesses and improve the flexible manufacturing capability of the whole sewing machine system, the overedger 100 is further provided with a cloth feeding tooth rack adjusting mechanism 60, the cloth feeding tooth rack adjusting mechanism 60 is connected to the cloth feeding tooth rack 41 and used for adjusting the angle and the height of the cloth feeding tooth rack 41, and the cloth feeding tooth 413 is used for changing the feeding state of the cloth with different thicknesses, so that the cloth is in a proper tensioning state, and the sewing effect of the cloth with different thicknesses is improved.

The feed dog frame adjusting mechanism 60 is arranged on the side surface of the shell 10 and connected to the feed dog frame 41, the feed dog frame adjusting mechanism 60 comprises an adjusting component 61 and an operating component 62, one end of the adjusting component 61 is connected to the operating component 62, the other end of the adjusting component 61 is connected to the feed dog frame 41, and the adjusting component 61 is used for adjusting the angle of the feed dog frame 41; an operating assembly 62 is provided on the housing 10 for controlling the adjustment assembly 61.

Under the control of the operation assembly 62, the adjustment assembly 61 correspondingly adjusts the inclination angle of the feed dog frame 41 according to the thickness degree of the cloth, so that the inclination angle of the feed dog 413 on the feed dog frame 41 is changed, the height of the feed dog 413 can be changed by the integral inclination of the feed dog 413, and the feed dog 413 can adapt to the cloth with different thickness degrees through the height and inclination angle change of the feed dog 413.

The adjusting assembly 61 comprises an eccentric shaft 611 and an adjusting slider 612, the eccentric shaft 611 is connected to the operating assembly 62, the adjusting slider 612 is sleeved on the eccentric shaft 611 and embedded in two parallel extending arms 416 on the feed dog frame 41, the eccentric shaft 611 can drive the adjusting slider 612 to move under the driving of the operating assembly 62, so as to adjust the angle of the feed dog frame 41.

The eccentric shaft 611 comprises a concentric section 6111 and an eccentric section 6112 connected to the concentric section 6111, the concentric section 6111 of the eccentric shaft 611 is fixed on the housing 10, and the eccentric shaft 611 can rotate around the central axis of the concentric section 6111; the center of the eccentric section 6112 is not concentric with the center of the concentric section 6111, the eccentric section 6112 and the concentric section 6111 are offset by a preset distance, and the eccentric section 6112 can be driven by the concentric section 6111 to rotate.

The adjusting slider 612 is block-shaped, and the inner portion of the adjusting slider 612 is hollow and sleeved with the eccentric section 6112 of the eccentric shaft 611, the adjusting slider 612 is embedded between the two parallel extending arms 416, the adjusting slider 612 is rotatably connected with the eccentric section 6112 of the eccentric shaft 611, and the rotation of the eccentric section 6112 of the eccentric shaft 611 drives the adjusting slider 612 to rotate in parallel.

Because the adjusting slider 612 is embedded between the two parallel extension arms 416, the adjusting slider 612 can slide on the track formed by the extension arms 416, and the adjusting slider 612 can slide in the sliding groove 418 formed between the extension arms 416, so that the movement in the second direction caused by the eccentric shaft 611 can be released, and the parallel rotation of the adjusting slider 612 can only drive the extension arms 416 to ascend or descend in the first direction. The extension arm 416 is disposed at one end of the feed dog 41, and the other end of the feed dog 41 is fixed by the main shaft 20, so that the feed dog 41 is driven to tilt by the rising or falling of the extension arm 416 in the first direction, and the tilt angle of the feed dog 41 is determined by the moving distance of the extension arm 416 in the first direction.

The operation component 62 includes a control component 621 and a transmission component 622, the control component 621 is connected to the transmission component 622, the transmission component 622 is disposed between the control component 621 and the adjustment component 61, the control component 621 is used for an operator to control rotation, the transmission component 622 is used for transmitting the rotation of the control component 621 to the adjustment component 61, and controlling the change amount of the inclination angle of the feed dog frame 41 by the adjustment component 61 according to the rotation amount of the control component 621.

The control element 621 is connected with the transmission assembly 622, the rotation amount of the control element 621 is transmitted to the adjusting assembly through the transmission assembly 622, and an operator can adjust the inclination angle and height of the feed dog frame 41 in real time by operating the control element 621, so that the operation is very convenient.

Further, the operating assembly 62 comprises a control element 621 and a transmission assembly 622, the transmission assembly 622 is disposed between the control element 621 and the eccentric shaft 611, and the control element 621 adjusts the deflection angle of the eccentric shaft 611 through the transmission assembly 622 in an electric control manner, so as to adjust the angle and height of the feed dog 413.

In the first embodiment of the overedger 100, the control element 621 is an electric control element 6211, and the operating unit 62 adjusts the rotation angle of the eccentric shaft 611 by electric control, so as to adjust the feed dog 41 to a preset angle.

Further, the transmission assembly 622 includes a worm 6221 sleeved on the output shaft of the electric control element 6211 and a worm wheel 6222 sleeved on the concentric section 6111 of the eccentric shaft 611, the worm 6221 is fixedly connected with the output shaft of the electric control element 6211, the worm wheel 6222 is fixedly connected with the concentric section 6111 of the eccentric shaft 611, the rotation of the output shaft of the electric control element 6211 drives the worm wheel 6222 to rotate to a preset angle through the mutual engagement of the worm 6221 and the worm wheel 6222, and due to the fixed connection between the worm wheel 6222 and the eccentric shaft 611, the rotation of the worm wheel 6222 drives the eccentric shaft 611 to rotate, thereby realizing the adjustment of the angle and the height of the feed dog 413.

Further, the worm 6221 is fixed on the output shaft of the electric control element 6211 by screw pressing; the worm wheel 6222 is fixed to the concentric segment 6111 of the eccentric shaft 611 by screw tightening.

The output shaft of the electric control element 6211 is provided with a groove (not numbered) which is recessed along the radial direction, the screw penetrates through the worm gear 6222 and then abuts against the bottom wall of the groove, and the rotation of the output shaft of the electric control element 6211 can drive the worm gear 6222 to rotate through the groove.

In the present embodiment, since the central axis of the output shaft of the electric control element 6211 is perpendicular to the central axis of the eccentric shaft 611, the central axis of the worm 6221 is also perpendicular to the central axis of the worm wheel 6222. It is understood that in other embodiments, when the central axis of the output shaft of the electric control element 6211 and the central axis of the eccentric shaft 611 are offset to other angles, the central axis of the worm 6221 and the central axis of the worm wheel 6222 may form other angles, for example, they may be coaxially arranged.

Of course, the worm wheel 6222 can be fixed to the concentric segment 6111 by other fixing methods besides screw pressing, and the worm 6221 can also be fixed to the electric control element 6211 by other fixing methods besides screw pressing; as long as the fixing means can achieve reliable connection of the worm 6221 and the worm wheel 6222.

In the overedger 100 applying the cloth feeding tooth rack adjusting method provided by the invention, the transmission assembly 622 is not limited to be in a worm gear transmission mode; in other embodiments, the transmission assembly 622 may also adopt other types of transmission modes such as belt transmission, rack and pinion, shaft coupling and the like; the transmission assembly 622 can be omitted when the electric control element 6211 can directly drive the eccentric shaft 611 to rotate without the transmission assembly 622.

The rotation of the electric control element 6211 drives the worm wheel 6222 to rotate, the rotation of the worm wheel 6222 drives the eccentric shaft 611 to eccentrically rotate, and the eccentric rotation of the eccentric shaft 611 drives the adjusting slider 612 rotationally connected with the eccentric shaft 611 to change the position in the first direction, so that the angle and height of the feed dog frame 41 can be adjusted.

In this embodiment, the electric control element 6211 is a motor. It is understood that in other embodiments, the electric control element 6211 may be replaced with other electric drive elements besides a motor. As long as the electric drive element can realize electric control.

In one embodiment, the electric control element 6211 is screwed to the side surface of the housing 10 through a fixing seat 623, and the fixing seat 623 and the electric control element 6211 are also screwed together, so that the electric control element 6211 is fixed to the side surface of the housing 10, which can facilitate the assembly, disassembly and adjustment of the electric control element 6211.

Certainly, in other embodiments, the electric control element 6211 and the fixed seat 623, and the fixed seat 623 and the housing 10 may be fixed to each other by gluing, riveting, or the like; the electric control element 6211 may be fixed to the housing 10 by other structures, and the fixing seat 623 may be omitted.

In one embodiment, the adjusting assembly 61 further comprises a bushing 613, the bushing 613 is sleeved on the concentric section 6111 of the eccentric shaft 611 and fixed on the housing 10, and the bushing 613 is used for bearing the eccentric shaft 611, so as to provide a stable rotation environment for the eccentric shaft 611. The sleeve 613 has the advantages of corrosion resistance, low cost and the like, and is more suitable for a working condition environment with low-speed rotation.

Further, the sleeve 613 is a copper sleeve. It is understood that in other embodiments, the sleeve may be made of other materials than copper; the sleeve 613 may also be a rolling bearing, regardless of the cost and operating conditions of low speed rotation.

In one embodiment, two first retaining rings 614 are disposed on two sides of the sleeve, the two first retaining rings 614 are disposed at two opposite ends of the sleeve 613, and the first retaining rings 614 are used for fixing the position of the sleeve 613 on the eccentric shaft 611 to prevent the sleeve from being displaced due to vibration.

Further, the first retainer ring 614 is fixed on the concentric segment 6111 of the eccentric shaft 611 by means of screw compression. Of course, the first retainer ring 614 may also be fixed to the eccentric shaft 611 by other methods such as gluing, riveting, etc., as long as the first retainer ring 614 can be firmly fixed to the concentric section 6111 of the eccentric shaft 611; the copper sleeve may also be provided with other elements to achieve its own retention, in which case the first retainer 614 may be omitted.

In one embodiment, two second retaining rings 615 are respectively disposed on two sides of the adjusting slider 612, the two second retaining rings 615 are oppositely disposed on two sides of the adjusting slider 612 and are sequentially sleeved on the eccentric section 6112 of the eccentric shaft 611 together with the adjusting slider 612, and the second retaining rings 615 are used for fixing the position of the adjusting slider 612 on the eccentric shaft 611 and preventing the adjusting slider 612 from deviating out of the sliding groove 418 due to vibration.

Further, the second retainer ring 615 is fixed to the eccentric section 6112 of the eccentric shaft 611 by means of screw compression. Of course, the second retainer ring 615 may also be fixed to the eccentric shaft 611 by gluing, riveting, or other methods, as long as the second retainer ring 615 can be firmly fixed to the eccentric section 2 of the eccentric shaft 611; the adjustment slider 612 may also employ other elements to achieve its own position limit, in which case the second stop ring 615 may be omitted.

Further, the overedger 100 may further be provided with a thickness detection module (not shown) for detecting the thickness of the fabric in real time, and the electric control element 6211 may adjust the fabric feeding rack 41 to a corresponding inclination angle and height according to the thickness detected by the thickness detection module.

Furthermore, the thickness detection module can adopt Hall elements, infrared detection and other modes to realize the detection of the cloth thickness.

The following explains the principle that the overedger 100 adjusts the angle and height of the feed dog 41 by the feed dog adjusting mechanism 60 to adapt to cloth with different thickness degrees.

When one end of the feed dog frame 41 is changed in height under the adjustment of the feed dog frame adjusting mechanism 60, the inclination angle of the whole feed dog frame 41 is changed, the change of the inclination angle of the whole feed dog frame 41 changes the inclination angle of the feed dog 413, namely the horizontal level of the driving dog 4131 and the differential dog 4132 is changed into the inclined level, and the sewing effect of the machine head is changed due to the height change caused by the inclination angle between the driving dog 4131 and the differential dog 4132 because the driving dog 4131 and the differential dog 4132 respectively feed cloth with different elliptical trajectories.

Referring to fig. 15a to 15c, fig. 15a is a schematic diagram of the feed dog 41 in a normal operating state, fig. 15b is a schematic diagram of the feed dog 41 in a thick material operating state, and fig. 15c is a schematic diagram of the feed dog 41 in a thin material operating state. In the figure, sign S indicates an elliptical motion trajectory of the driving tooth 4131 and the differential tooth 4132, V indicates a tangential direction of the driving tooth 4131 and the differential tooth 4132 when cutting a working plane, and F indicates a direction of elastic force of the driving tooth 4131 and the differential tooth 4132 against the cloth.

(1) When the feed dog frame 41 is in a normal working state: the cloth feeding tooth frame 41 is not inclined, the driving teeth 4131 and the differential teeth 4132 are horizontally level, the driving teeth 4131 and the differential teeth 4132 synchronously contact the cloth, and at the moment, the direction of the elastic force F acted on the cloth by the driving teeth 4131 and the differential teeth 4132 is the same as the tangential angle direction when the driving teeth 4131 and the differential teeth 4132 cut out the working plane, and the vertical direction is the vertical direction, so that the cloth feeding tooth frame is suitable for sewing and processing the cloth with ordinary thickness and moderate hardness.

(2) When the cloth feeding tooth frame 41 is in a thick material working state: the feed dog frame 41 is inclined, so that the height of the driving tooth 4131 is lower than that of the differential tooth 4132, at this time, the direction of the elastic force F acted on the cloth by the driving tooth 4131 and the differential tooth 4132 still keeps the vertical direction, but the tangential angle direction when the working plane is cut by the driving tooth 4131 and the differential tooth 4132 does not keep the vertical direction any more, and the cloth feeding is performed in a beveling manner;

because the height of the driving teeth 4131 is lower than that of the differential teeth 4132, the differential teeth 4132 rise above the needle plate before the driving teeth 4131 and contact the cloth in advance, and the cloth feeding efficiency of the differential teeth 4132 is higher than that of the driving teeth 4131, when the driving teeth 4131 and the differential teeth 4132 feed the cloth, the differential teeth 4132 have a certain catching effect relative to the driving teeth 4131, so that the pushing effect on the cloth is formed, the cloth feeding of thick materials such as multiple layers, peduncles and seams is smooth, the needle pitch is uniform, and the sewing quality is better.

(3) When the cloth feeding tooth rack 41 is in a thin material working state: the feed dog frame 41 is inclined, so that the height of the driving tooth 4131 is higher than that of the differential tooth 4132, at this time, the direction of the elastic force F acted on the cloth by the driving tooth 4131 and the differential tooth 4132 still keeps the vertical direction, but the tangential angle direction of the cutting surfaces of the driving tooth 4131 and the differential tooth 4132 does not keep the vertical direction any more, and the feeding of the cloth is carried out by the driving tooth 4131 and the differential tooth 4132 in a beveling manner;

since the height of the driving teeth 4131 is higher than that of the differential teeth 4132, the driving teeth 4131 rise above the needle plate 13 before the differential teeth 4132 and contact the fabric in advance, and the fabric feeding efficiency of the driving teeth 4131 is higher than that of the differential teeth 4132, when the driving teeth 4131 and the differential teeth 4132 feed the fabric, the driving teeth 4131 have a certain separation effect relative to the differential teeth 4132, so that a dragging effect on the fabric is formed, thin materials such as a screen yarn and the like are flat and not wrinkled, and the sewing quality is better.

Referring to fig. 16 and 17 together, fig. 16 is a schematic structural diagram of a feed dog adjusting mechanism 60a in a second embodiment of an overedger 100 applying the feed dog adjusting method of the present invention, and fig. 17 is an exploded schematic view of the feed dog adjusting mechanism 60a shown in fig. 16. The connection relationship and the function of the adjusting component 61a and the operating component 62a in the second embodiment of the present invention are the same as those in the first embodiment, and are not described herein again.

In the second embodiment of the overedger 100, the adjusting mechanism 61 comprises, in addition to the above-mentioned eccentric shaft 611 and adjusting slider 612, an adjusting crank 613a, the eccentric shaft 611, adjusting slider 612 and adjusting crank 613a all extend along a lateral direction perpendicular to the length direction of the feed dog frame 41, the eccentric shaft 611 passes through the adjusting slider 612 and adjusting crank 613a, the adjusting slider 612 is sleeved on the eccentric shaft 611 and embedded in two parallel extending arms 416 on the feed dog frame 41, and the adjusting crank 613a is fixedly sleeved on the eccentric shaft 611 and connected to the operating assembly 62 a. The adjusting crank 613a is driven by the operating component 62a to drive the eccentric shaft 611 to rotate, the rotation of the eccentric shaft 611 drives the adjusting slider 612 to move, and the feed dog adjusting mechanism 60 drives the feed dog 41 to adjust the height and the inclination angle thereof by the movement of the adjusting slider 612.

One end of the adjusting crank 613a is sleeved on the concentric section 6111 of the eccentric shaft 611, the other end of the adjusting crank 613a extends outward along the radial direction of the eccentric shaft 611 and is rotatably connected with the operating assembly 62a, a through hole (not numbered) is formed in a part of the adjusting crank 613a extending outward along the radial direction of the eccentric shaft 611, the adjusting crank 613a is connected with the operating assembly 62a through the through hole, and the adjusting crank 613a can be driven by the operating assembly 62a to rotate, so that the eccentric shaft 611 is driven to rotate.

In the present embodiment, the adjusting crank 613a is pressed against the concentric section 6111 of the eccentric shaft 611 by a threaded fastener (not numbered). It is understood that in other embodiments, the adjusting crank 613a may also be fixed to the concentric section 6111 of the eccentric shaft 611 by riveting, gluing, etc.

In the present embodiment, the adjustment crank 613a is fixed to the eccentric shaft 611 by screw fastening. It is understood that the adjusting crank 613a may be fixed on the eccentric shaft 611 by other methods such as gluing, riveting, etc., as long as the adjusting crank 613a can be firmly fixed on the eccentric shaft 611.

In the present embodiment, the adjusting crank 613a further has a through hole (not numbered) for engaging with the operating assembly 62a, and the through hole is used for inserting a part of the operating assembly 62a, so as to fix the operating assembly 62a and the adjusting crank 613a to each other.

The adjusting crank 613a rotates under the operation control of the operation assembly 62a and drives the eccentric shaft 611 to rotate; the rotation of the eccentric shaft 611 drives the adjusting slider 612 connected with the eccentric section 6112 of the eccentric shaft 611 to rotate, the operation of the adjusting slider 612 is divided into sliding along the length direction of the feed dog frame 41 in the sliding groove 418 and rising or falling in the vertical direction, and the rising or falling of the adjusting slider 612 drives one end of the feed dog frame 41 to rise or fall, thereby changing the inclination angle and height of the feed dog frame 41.

In the second embodiment of the overedger 100, the adjusting assembly 61a further includes a first bushing 614a, the first bushing 614a is sleeved on the concentric section 6111 of the eccentric shaft 611 and fixed on the housing 10, and the first bushing 614a is used for bearing the eccentric shaft 611, providing a stable rotation environment for the eccentric shaft 611. The first shaft sleeve 614a has the advantages of corrosion resistance, low cost and the like, and is more suitable for the working condition environment of low-speed rotation.

Further, the first bushing 614a is a copper bushing. It is understood that in other embodiments, the sleeve may be made of other materials than copper; the first bushing 614a may also be implemented as a rolling bearing, regardless of the cost and operating conditions of low speed rotation.

In the second embodiment of the overedger 100, the operating component 62a is disposed on the side of the housing 10 perpendicular to the length direction of the feed dog 41, so as to facilitate the operation of the operator, and the operator can adjust the inclination angle and height of the feed dog 41 without turning the cover, thereby achieving convenient and fast adjustment and improving the processing efficiency.

Of course, in other embodiments, the operating unit 62a may be disposed at other positions of the housing 10, as long as the operating unit 62a can drive the adjusting unit 61a to adjust the inclination angle and the height of the feed dog frame 41 under the operation of the operator.

In the second embodiment of the overedger 100, the control element 621 is a control rod 6212, the control rod 6212 can rotate relative to the transmission assembly 622, and the operator can adjust the inclination angle of the feed dog carrier 41 by the rotation amount of the control rod 621 relative to the transmission assembly 622.

In the second embodiment of the overlock machine 100, the transmission assembly 622 transmits the amount of rotation of the control rod 6212 by way of a pin transmission,

the transmission assembly 622 comprises a connecting pin 6221a, a transmission crank 6222a, a guide 6223a and a slider 6224a, one end of the transmission crank 6222a is rotatably connected to the connecting pin 6221a, the other end of the transmission crank 6222a is rotatably connected to the slider 6224a, the slider 6224a is embedded in the guide 6223a and slides relative to the guide 6223a under the guiding action of the guide 6223a, the transmission assembly 622a drives the transmission crank 6222a to rotate through the connecting pin 6221a, the adjustment crank 613a is driven to rotate through the rotational connection between the transmission crank 6222a and the slider 6224a, and partial motion components of the adjustment crank 613a are released through the sliding of the slider 6224a on the guide 6223a, so that the power transmission of the rotation quantity of the control rod 6212 is realized.

In the second embodiment of the overedger 100, in order to further improve the operation convenience of the operator, the operating assembly 62a further includes a locking disk 623a, the locking disk 623a is fixedly arranged on the side surface of the housing 10 perpendicular to the length direction of the cloth feeding rack 41, a sliding slot 6231a for the sliding of the control element 621 is formed in the locking disk 623a, and the sliding of the control element 621 on the sliding slot 6231a can improve the operation convenience of the operator on the control element 621 and the stability of the sliding of the control element 621, thereby improving the adjustment efficiency.

Further, a status indicator 6232a is disposed on the locking disk 623a, and the status indicator 6232a is used for guiding the operation of the operator and informing the operator of the current adjustment status. The status indicator 6232a may employ a directional arrow to direct manual operation of the operator, and words such as "high-low" and "large-small" to indicate the current adjustment status. Of course, the status indicator 6232a can also be a dial or other indication means besides arrows and words to indicate the current adjustment status.

Further, a locking nut 6233a is also provided on the locking disc 623a, which is fixedly connected to the end of the control element 621 remote from the connecting pin 6221, the locking nut 6233a being fixedly connected to the control element 621 and limiting the movement of the control element 621 in the direction in which the vertical sliding slot 6231a extends. The locking nut 6233a can slide in the sliding slot 6231a under the direct operation of the operator, and the locking nut 6233a is used for the operator to directly contact manually, so that the situation that the operator needs to directly pull the control element 621 in the shape of an elongated rod to operate the control element 621 is avoided, and the convenience of operation is further improved.

In the second embodiment of the overlock machine 100, the transmission assembly 622 further comprises a fixing element 6227a embedded in one end of the connecting pin 6221a away from the control element 621a, and the fixing element 6227a can fix the transmission crank 6222a at a lateral position of the housing 10, so as to limit the connecting pin 6221a and the transmission crank 6222a in the axial direction.

In the feed dog frame adjusting mechanism 60 provided by the second embodiment of the overedger 100, the control element 621 adopts the control rod 6212 as an element directly operated by an operator, the control rod 6212 can realize manual direct operation of the operator, the operability is relatively good, the cost is low, and the market demand for low-price products can be met.

In other embodiments, the operation assembly is further arranged on the casing 10 and exposed through the notch on the cover body, so that the operation assembly can be exposed on the casing 10, operation of an operator can be facilitated, the adjustment of the inclination angle and the height of the cloth feeding tooth rack 41 can be realized without turning over the cover body by the operator, the adjustment is convenient and fast, and the processing efficiency is improved.

In the present embodiment, the control rod 6212 drives the eccentric shaft 611 to rotate through the transmission assembly 622. It is understood that in other embodiments, the control rod 6212 may be installed on the side of the housing 10 parallel to the feed dog carrier 41, and the rotation of the control rod 6212 may directly drive the eccentric shaft 611 to rotate, and the two may be driven by being embedded with each other, and the driving assembly 622 may be omitted, and the adjusting crank 613a of the adjusting assembly 61a for interconnecting with the driving assembly 622 may be omitted.

In other embodiments, the control element 621 adopting a manual operation mode may adopt other types such as a knob, as long as the control element 621 adopting a manual operation mode can adjust the inclination angle and the height of the feed dog 41 according to the rotation amount thereof.

It is important to point out that the two embodiments provided by the present invention can be combined with each other, for example, the setting position of the operation component, the specific transmission manner of the transmission structure, etc. can be replaced with each other, as long as the replacement of the two embodiments does not affect the realization of the inclination and height adjustment of the feed dog frame 41 by the feed dog frame adjusting mechanism 60.

It should be emphasized that the above description of the structure of the overedger 100 to which the feed dog adjustment method of the present invention is applied is merely for illustrating the basis on which the present invention can be applied, and does not limit the application of the feed dog adjustment method of the present invention to the overedger 100 described above. The specific flow of the feed dog adjusting method is described below.

Referring to fig. 18, fig. 18 is a schematic flow chart illustrating a feed dog adjusting method according to an embodiment of the present invention.

The cloth feeding tooth frame adjusting method is applied to an overlock machine, the overlock machine comprises an operation assembly and an adjusting assembly, the adjusting assembly comprises an adjusting slide block and an eccentric shaft, and the cloth feeding tooth frame adjusting method comprises the following steps:

and step S10, operating the operating assembly and driving the eccentric shaft to rotate. Specifically, an operator drives the eccentric shaft connected with the operating assembly to rotate through the operation of the operating assembly; the operation assembly can drive the eccentric shaft to rotate in a rotation transmission mode, and can also drive the eccentric shaft to rotate in a linear transmission mode through the linear stroke of the operation assembly.

And step S20, driving the adjusting slide block to move relative to the eccentric shaft by using the rotation of the eccentric shaft. Specifically, the eccentric shaft is provided with a concentric section and an eccentric section connected with the concentric section, the adjusting slide block is sleeved on the eccentric section of the eccentric shaft, the eccentric shaft can be driven to eccentrically rotate by the rotation of the eccentric shaft around the center of the concentric section, and the adjusting slide block is embedded on the feed dog frame, so that the rotation of the eccentric shaft can drive the adjusting slide block to move relative to the eccentric shaft.

And step S30, adjusting the inclination angle and the height of the feed dog rack by utilizing the sliding of the adjusting slide block on the feed dog rack and the rising or falling of one end of the feed dog rack. Specifically, the adjusting slide block is embedded in a sliding groove formed in the cloth feeding tooth frame, the adjusting slide block is separated into sliding along the sliding groove and lifting or descending of a vertical sliding groove relative to the action of the eccentric shaft, and the lifting or descending of the adjusting slide block drives one end of the cloth feeding tooth frame to lift or descend, so that the inclination angle and the height of the cloth feeding tooth frame are adjusted.

According to the invention, the height of the feed dog frame at one end is changed by arranging the operating assembly and the adjusting assembly, so that the inclination angle and the height of the whole feed dog frame are changed, and the inclination angle and the height can be adjusted simultaneously.

In the first embodiment of the present invention, step S10 includes the following step S11.

Step S11: and controlling a control element of the operating assembly to rotate and driving the eccentric shaft to rotate. Specifically, the operating assembly comprises a control element, the control element is connected to the adjusting assembly, an operator operates the control element to rotate so as to drive the eccentric shaft to rotate, and the operating assembly transmits and adjusts the inclination angle and the height of the feed dog frame through the rotation amount of the control element.

Thus, in a first embodiment of the invention, the feed dog adjustment method comprises:

step S11: controlling a control element of the operating assembly to rotate and driving the eccentric shaft to rotate;

step S20: the rotation of the eccentric shaft is utilized to drive the adjusting slide block to move relative to the eccentric shaft;

step S30: the inclination angle and the height of the feed dog rack are adjusted by utilizing the sliding of the adjusting slide block on the feed dog rack and the rising or falling of the adjusting slide block at one end of the feed dog rack.

In a first embodiment of the invention, the driving of the rotation of the eccentric shaft is achieved by providing a control element. The rotation amount of the eccentric shaft is controlled by using the rotation amount of the control element, so that the adjustment is accurate and the control is easy.

In the second embodiment of the present invention, the control element is an electric control element, and the step S11 includes the following step S12.

Step S12: and operating the electric control element to drive the eccentric shaft to rotate in an electric control mode.

Specifically, electric control element can realize electric control, and it can rotate under electric control's mode, and operating personnel utilizes electronic button, operating panel just can direct input or control the regulating variable, and the operation is very convenient.

In a second embodiment of the invention, the electrical control element is an electric motor. It is understood that in other embodiments, the electric control element may be an electric control element in other manners besides the motor.

Thus, in a second embodiment of the invention, the feed dog adjustment method comprises:

step S12: the electric control element is controlled to drive the eccentric shaft to rotate in an electric control mode;

In the second embodiment of the invention, an operator can adjust the rotation of the eccentric shaft in an electric control mode through the electric control element, the adjustment is quick and convenient, and the precision is relatively improved.

In the third embodiment of the present invention, the control element is a lever, and the step S11 includes the following step S13.

Step S13: and the control rod is controlled to drive the eccentric shaft to rotate in a manual operation mode. Specifically, one end of the control rod is connected to the eccentric shaft, and the control rod can swing under the pulling of an operator, so that the eccentric shaft is driven to rotate.

Thus, in a third embodiment of the invention, the feed dog adjustment method comprises:

step S13: the control rod is controlled to drive the eccentric shaft to rotate in a manual operation mode;

In a third embodiment of the present invention, the control rod can rotate relative to its own connecting end under the pulling of an operator, so as to drive the eccentric shaft to rotate, and the control rod is used as an element directly operated by the operator, so as to directly implement manual operation, and has relatively good operability and low cost, and can meet the market demand for low-price products.

In the fourth embodiment of the present invention, the step S11 further includes the following step S14.

Step S14: and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through a transmission assembly and drive the eccentric shaft to rotate. Specifically, the transmission assembly is arranged between the eccentric shaft and the control element, and the control element transmits the rotation amount of the control element by using the transmission assembly.

Thus, in a fourth embodiment of the invention, the feed dog adjustment method comprises:

step S14: and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through a transmission assembly and drive the eccentric shaft to rotate.

In the fourth embodiment of the invention, the transmission assembly is arranged, so that the power transmission requirements under various working conditions can be met, and the adaptability of the feed dog frame in the adjusting process is stronger.

In the fifth embodiment of the present invention, step S14 further includes the following step S141.

Step S141: and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through the power transmission of the worm wheel and the worm and drive the eccentric shaft to rotate. The transmission assembly comprises a worm wheel and a worm, the worm is sleeved on an output shaft of the electric control element, the worm wheel is sleeved on a concentric section of the eccentric shaft, and the worm wheel and the worm are meshed with each other and can transmit rotation.

Of course, in other embodiments, the transmission assembly may also realize the rotation adjustment of the eccentric shaft through other manners such as belt transmission, chain transmission, four-bar transmission, and the like.

Thus, in a fifth embodiment of the invention, the feed dog adjustment method comprises:

step S141: and the control element is controlled to transmit the rotation of the control element to the eccentric shaft through the power transmission of the worm wheel and the worm and drive the eccentric shaft to rotate.

In the fifth embodiment of the invention, the transmission assembly adopts a worm gear to transmit the rotation quantity of the intersecting shafts, so that not only can reverse rotation be prevented, but also accurate adjustment can be realized.

In the sixth embodiment of the present invention, step S12 includes the following step S121 and step S122.

Step S121: the thickness detection module detects the thickness of the cloth;

step S122: and the electric control element drives the eccentric shaft to rotate by a corresponding angle according to the cloth thickness detected by the thickness detection module.

Specifically, the overedger further comprises a thickness detection module, the thickness detection module can detect the thickness of the cloth, and the electric control element correspondingly adjusts the rotation amount of the eccentric shaft according to the detected thickness of the cloth, so that the adjustment process is automatically realized in real time.

In this embodiment, thickness detection module includes hall element and magnetic part, thickness detection module detects the thickness of cloth through hall principle is indirect, surveys the thickness of cloth through the hall effect, not only has great advantage in the cost, still has higher interference killing feature, can adapt to complicated production environment.

Of course, in other embodiments, the thickness detection module may also implement direct measurement or indirect measurement of the thickness of the fabric by using an ultrasonic distance sensor, an infrared distance sensor, an optical distance sensor, a pressure sensor, and the like.

Thus, in a sixth embodiment of the invention, the feed dog adjustment method comprises:

step S121: the thickness detection module detects the thickness of the cloth;

The height of the cloth feeding dental frame at one end is changed through the rotating matching between the eccentric shaft and the adjusting slide block, the simultaneous adjustment of the inclination angle and the height can be realized, and the overedger using the method can be automatically adapted to cloth with different thicknesses, and has wide application prospect.

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

1. A cloth feeding tooth frame adjusting method is applied to an overedger and is used for adjusting the inclination angle and the height of a cloth feeding tooth frame in the overedger, and is characterized in that the overedger comprises an operating assembly and an adjusting assembly, the adjusting assembly comprises an eccentric shaft and an adjusting slide block, the eccentric shaft penetrates through the adjusting slide block and is connected to the operating assembly, the adjusting slide block is embedded in the cloth feeding tooth frame, and the cloth feeding tooth frame adjusting method comprises the following steps:

operating the operating assembly and driving the eccentric shaft to rotate;

the inclination angle and the height of the feed dog rack are adjusted by utilizing the sliding of the adjusting slide block on the feed dog rack and the rising or falling of the adjusting slide block at one end of the feed dog rack;

the operation assembly comprises a control element, the control element is connected to the eccentric shaft, and the step of controlling the control element of the operation assembly to rotate and drive the eccentric shaft to rotate comprises the following steps:

controlling a control element of the operating assembly to rotate and driving the eccentric shaft to rotate;

the operation assembly further comprises a transmission assembly, the transmission assembly is arranged between the operation assembly and the eccentric shaft, and the step of controlling the control element of the operation assembly to rotate and driving the eccentric shaft to rotate comprises the following steps:

the control element is controlled to transmit the rotation of the control element to the eccentric shaft through a transmission assembly and drive the eccentric shaft to rotate; the transmission assembly comprises a worm wheel and a worm, the worm wheel and the worm are meshed with each other, and the step of controlling the control element to transmit the rotation of the control element to the eccentric shaft through the transmission assembly and drive the eccentric shaft to rotate comprises the following steps:

2. The feed dog carrier adjustment method of claim 1, wherein the control element is an electrically controlled element, and the step of operating the control element of the operating assembly to rotate and drive the eccentric shaft to rotate comprises:

3. The feed dog adjustment method of claim 2, wherein the electrical control element is a motor.

4. The feed dog carrier adjusting method according to claim 2, wherein the overedger further comprises a thickness detection module for detecting the thickness of the cloth, and the step of operating the electric control element to rotate the eccentric shaft in an electric control manner comprises:

the thickness detection module detects the thickness of the cloth;

5. The cloth feed dog adjusting method according to claim 4, wherein the thickness detection module comprises a Hall element and a magnetic member, the Hall element and the magnetic member are matched with each other, and the thickness detection module detects the thickness of the cloth by a Hall principle.

6. The feed dog adjusting method of claim 4, wherein the thickness detecting module comprises at least one of an ultrasonic distance sensor, an infrared distance sensor, an optical distance sensor, and a pressure sensor.

7. The feed dog adjusting method of claim 1, wherein the control element is a control lever, and the step of operating the control element of the operating assembly to rotate and drive the eccentric shaft to rotate comprises: