CN209873291U - Overedger - Google Patents

Abstract

The utility model provides a overedger, which comprises a feed dog frame and a feed dog frame adjusting mechanism connected with the feed dog frame, wherein the feed dog frame adjusting mechanism comprises an adjusting component and an operating component, the adjusting component comprises an eccentric shaft connected with the feed dog frame, and the eccentric shaft is driven by the operating component to rotate and adjust the inclination angle and the height of the feed dog frame; the overedger comprises an induction component, a driver and a control component, wherein the induction component is used for inducing the rotation angle of the eccentric shaft, the driver is connected to the eccentric shaft and can drive the eccentric shaft to rotate, the control component is electrically connected to the driver and can control the driver to operate, the control component controls the driver to operate according to the detection result of the induction component, and the driver drives the eccentric shaft to rotate to a preset angle and reset the cloth feeding tooth frame. The utility model provides a hemming machine can detect the turned angle of eccentric shaft through setting up response subassembly for start at every turn or detect the preceding work feed dental articulator and can reset to initial position, thereby ensure the accuracy of follow-up regulation.

Description

Overedger

Technical Field

The utility model relates to a sewing technical field especially relates to an overedger.

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. In order to adapt to the cloth with different thickness degrees, a cloth feeding tooth rack adjusting mechanism is further arranged inside the overedger to synchronously adjust the inclination angle and the height of the cloth feeding tooth rack. However, the prior overedger cannot reset the inclination angle and the height of the feed dog frame, and the feed dog frame cannot reset to cause the deviation of subsequent adjustment quantity, thereby reducing the production quality.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an improved overedger that allows for a reduction in feed dog inclination and height.

The utility model provides a overedger, including a feed dog frame and a feed dog frame adjusting mechanism connected with the feed dog frame, wherein the feed dog frame adjusting mechanism includes an adjusting component and an operating component, the adjusting component includes an eccentric shaft connected with the feed dog frame, the eccentric shaft is driven by the operating component to rotate and adjust the inclination angle and the height of the feed dog frame;

the overedger comprises an induction component, a driver and a control component, wherein the induction component is used for inducing the rotation angle of the eccentric shaft, the driver is connected to the eccentric shaft and can drive the eccentric shaft to rotate, the control component is electrically connected to the driver and can control the driver to operate, the control component controls the driver to operate according to the detection result of the induction component, and the driver drives the eccentric shaft to rotate to a preset angle and resets the cloth feeding tooth frame.

Furthermore, the induction assembly comprises a hall sensor and a magnetic part, the hall sensor and the magnetic part are oppositely arranged, the magnetic part is connected to the eccentric shaft, and the hall sensor detects the rotation angle of the eccentric shaft through the movement of the magnetic part along with the eccentric shaft.

Further, the magnetic part is magnetic steel.

Furthermore, a connecting piece is arranged between the eccentric shaft and the magnetic piece, one end of the connecting piece is connected to the eccentric shaft, and the other end of the connecting piece bears the magnetic piece.

Furthermore, a groove is formed in the connecting piece, and the magnetic piece is embedded in the groove and arranged corresponding to the Hall sensor.

Further, the overedger has a housing, the housing has a limit groove for accommodating the connecting member, and the limit groove limits the rotation angle of the eccentric shaft by limiting the swing angle of the connecting member.

Furthermore, the spacing groove is fan-shaped, the connecting piece be the strip and follow the radial extension of spacing groove.

Furthermore, the adjusting assembly comprises an adjusting slide block which is embedded in the cloth feeding tooth rack and can slide relative to the cloth feeding tooth rack, the eccentric shaft is provided with a concentric section and an eccentric section connected with the concentric section, and the eccentric section of the eccentric shaft penetrates through the adjusting slide block and is in running fit with the adjusting slide block;

the operation assembly comprises an electric control element and a transmission assembly, and the electric control element controls the eccentric shaft to rotate under the transmission action of the transmission assembly and drives the adjusting slide block to adjust the inclination angle and the height of the cloth feeding tooth rack;

the overedger is provided with a control center, and the control center is used for controlling the operation of each component of the overedger.

Further, the driver is the electric control element, and the control part is the control center.

Further, the transmission assembly is one or more than one of chain transmission, belt transmission, gear transmission and worm and gear transmission.

The utility model provides a hemming machine through set up with control electric connection the response subassembly can detect the turned angle of eccentric shaft for start at every turn or detect the preceding work feed dental articulator and can reset to initial position, thereby ensure the accuracy of follow-up regulation, the working capability of hemming machine complete machine promotes, has extensive application prospect.

Drawings

FIG. 1 is a schematic structural view of the overedger provided by the present invention with part of the structure omitted;

FIG. 2 is an exploded view of the overlock machine shown in FIG. 1;

FIG. 3 is a schematic structural view of the overedger shown in FIG. 2 without the shell;

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 of the overedger shown in FIG. 2 engaged with a feed dog;

FIG. 13 is an exploded view of the feed dog adjustment mechanism of FIG. 12;

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

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 in a thin material working state.

Description of the main elements

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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 overlock machine 100 according to the present invention with a portion of the structure omitted, fig. 2 is an exploded schematic view of the overlock machine 100 shown in fig. 1, and fig. 3 is a schematic structural view of the overlock machine 100 shown in fig. 1 with a housing 10 omitted. 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 utility model provides a hemming machine 100 includes casing 10, main shaft 20, presser foot mechanism 30, work feed mechanism 40 and aircraft nose (not shown), and main shaft 20 sets up in the inside of casing 10 and is connected in work feed mechanism 40 and aircraft nose, and presser foot mechanism 30, work feed mechanism 40 and aircraft nose all set up on casing 10, and presser foot mechanism 30 is relative with work feed mechanism 40 and is close to the aircraft nose setting.

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 casing 10 is further provided with a cover 14, an operation opening 15 is formed between the cover 14 and the casing 10, the cover 14 is rotatably connected to the side of the casing 10, the upper surface of the cover 14 is flush with the working plane 131, and the rotation of the cover 14 can close or open the operation opening 15. The overedger 100 has a part of the adjusting mechanism disposed inside the housing 10 and near the operation opening 15, and when the cover 14 opens the operation opening 15, the part of the adjusting mechanism can be exposed from the operation opening 15, and when the cover 14 closes the operation opening 15, the part of the adjusting mechanism is also closed to the housing 10.

This is done. When the overedger 100 requires parameter adjustment, the operator may flip and open the cover 14, thereby exposing the internal parameter adjustment assembly, and the operator may adjust through the exposed adjustment assembly. The cover 14 isolates part of the adjusting mechanism of the overedger 100 from the external environment, and can better protect the overedger on the basis of meeting the adjusting requirement.

The cover 14 has a substantially L-shaped cross section, and includes two plates, namely a first plate 141 and a second plate 142, which are disposed obliquely to each other, the first plate 141 and the second plate 142 are connected to each other, a plate surface of the first plate 141 is substantially parallel to an upper side surface of the casing 10, the second plate 142 is substantially parallel to an outer side surface of the casing 10, and one end of the first plate 141, which is away from the needle plate 13, is rotatably connected to the casing 10, so that the cover 14 can rotate relative to the casing 10, and the operation opening 15 can be opened or closed.

The length of the second plate 142 is less than that of the first plate 141, and since the length of the second plate 142 is less than that of the first plate 141, a notch 143 is formed in the second plate 142 with respect to the first plate 141. When the cover 14 is completely opened, one end of the second plate 142 abuts against the outer side surface of the housing 10, the notch 143 is closed, and the notch is used for avoiding the rotation of the second plate 142, so as to prevent the second plate 142 from being incapable of rotating due to assembly interference.

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, the action of a machine needle (not shown) and a curved needle (not shown) inside the machine head is controlled through crank transmission, 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 pass through a central hole of the oil baffle 414 and move within a space 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 (not numbered) is sleeved on the 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 the 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 that differential volume adjusted, the utility model provides a differential volume adjustment mechanism 50 is still including setting up the adjusting panel 54 in the casing 10 outside, has seted up spout (not reference numeral) on adjusting panel 54, adjusts pole 51 and the slider (not reference numeral) fixed connection of setting in the spout, has set firmly regulating part 541 on the slider, and operating personnel can adjust the swing position of pole 51 through operation regulating part 541 to the operating personnel's of being convenient for operation.

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

The utility model provides a differential quantity adjustment mechanism 50 still is provided with fixed axle 521 on differential crank 52, and fixed axle 521 sets firmly in the inside of casing 10 and realizes through an axle position screw 522 with the fixed connection who adjusts pole 51. 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 the cloth feeding dog adjusting mechanism 60 and the cloth feeding dog 41 in the overedger 100 shown in fig. 2, fig. 13 is an exploded schematic view of the cloth feeding dog adjusting mechanism 60 shown in fig. 12, and fig. 14 is an exploded schematic view of the cloth feeding dog adjusting mechanism 60 shown in fig. 13 at another viewing angle.

The existing overedger 100 can only process cloth with a specific thickness in the process of realizing sewing operation, and has poor sewing effect on cloth with other thickness ranges. In order to improve adaptability to different-thickness cloth 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, the cloth feeding tooth 413 is used for changing the feeding state of the cloth with different thicknesses by adjusting the angle and the height of the cloth feeding tooth rack 41, 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 319 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.

In one embodiment of the present invention, the operation assembly 62 adjusts the rotation angle of the eccentric shaft 611 in an electric control manner, so as to adjust the feed dog frame 41 to a predetermined angle.

Further, the operating assembly 62 includes an electric control element 621 and a transmission assembly 622, the transmission assembly 622 is disposed between the electric control element 621 and the eccentric shaft 611, and the electric 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 this embodiment, the transmission assembly 622 transmits the power output by the electric control element 621 to the adjusting assembly 61 in a belt transmission manner.

Specifically, the transmission assembly 622 includes a driving wheel 6221, a driven wheel 6222 and a synchronous belt 6223, the driving wheel 6221 is sleeved on the output shaft 6211 of the electric control element 621, the driven wheel 6222 is sleeved on the concentric section 6111 of the eccentric shaft 611, and the synchronous belt 6223 is disposed between the driving wheel 6221 and the driven wheel 6222. The driving wheel 6221 is fixedly connected to an output shaft 6211 of the electric control element 621, the driven wheel 6222 is fixedly connected to a concentric segment 6111 of the eccentric shaft 611, and the driving wheel 6221 transmits the power of the output shaft 6211 of the electric control element 621 through a synchronous belt 6223 and drives the driven wheel 6222 to rotate.

In the present embodiment, the driven wheel 6222 is provided with a threaded fastener 6224, and the threaded fastener 6224 is threaded on the concentric segment 6113 of the eccentric shaft 611 after passing through the center of the driven wheel 6222, so as to fix the driven wheel 6222 and the eccentric shaft 611 to each other.

It will be appreciated that in other embodiments, the driven wheel 6222 may be fixed to the eccentric shaft 611 in other manners, and the threaded fixing member 6224 may be omitted.

The driving wheel 6221 and the driven wheel 6222 are provided with gear teeth on the outer periphery thereof, and the synchronous belt 6223 is provided with a tooth-shaped structure on the inner side thereof, so that the synchronous belt 6223 is meshed with the driving wheel 6221 and the driven wheel 6222. After the electric control element 621 is electrified to generate power, the output shaft 6211 of the electric control element 621 rotates to drive the driving wheel 6221 to rotate, the driven wheel 6222 transmits the rotation power from the driving wheel 6221 through the synchronous belt 6223, the driven wheel and the eccentric shaft 611 fixedly connected with the driven wheel 6222 rotate together, the rotation of the eccentric shaft 611 drives the adjusting slider 612 rotatably connected with the eccentric shaft 611 to change the position in the first direction, and therefore the angle and height adjustment of the feed dog frame 41 is achieved.

The power output of the electric control element 621 drives the eccentric shaft 611 to rotate a certain preset angle through the transmission mode of the synchronous belt 6223, so that the height and the inclination angle of the cloth feeding tooth frame 41 and the cloth feeding tooth 413 can be effectively and accurately adjusted, the sewing of cloth with different thicknesses is further adapted, and the problems of cloth wrinkling or cloth layering and the like are not easy to occur.

Preferably, the synchronous belt 6223 may be an endless belt made of steel wire rope or glass fiber as a strong layer and covered with polyurethane or neoprene, and it is understood that the synchronous belt 6223 may be made of other composite materials as long as a certain strength can be maintained to achieve the purpose of belt transmission.

Further, the driving wheel 6221 is provided with a central through hole, which is fixed on the electric control element 621 in an interference fit with the output shaft 6211 of the electric control element 621; the driven wheel is fixed on the concentric section 6111 of the eccentric shaft 611 through screw pressing, and the two side end faces of the driven wheel 6222 are respectively provided with a positioning plate (not numbered) extending along the radial direction of the driven wheel 6222, and the positioning plates are used for limiting the synchronous belt 6223 from accidentally escaping from the driven wheel 6222 in the axial direction.

Of course, the driving wheel 6221 can also be fixed on the electric control element 621 by means of screw fastening, for example, and the driven wheel 6222 can also be fixed on the concentric segment 6111 by means other than screw fastening; as long as the fixing mode can realize reliable connection and linkage among the driving wheel 6221, the driven wheel 6222 and the synchronous belt 6223.

Further, in order to maintain the conveying efficiency of the timing belt 6223, a tension member (not shown) for urging the timing belt 6223 to a tensioned state is further installed on the timing belt 6223.

Preferably, a tension member is provided in a strip structure, one end of which is fixed to the housing 10 and the other end of which is pressed against the outside of the timing belt 6223, and the tension member 6226 is used to control the tension of the timing belt 6223.

In this embodiment, since the central axis of the output shaft 6211 of the electric control unit 621 is parallel to the central axis of the eccentric shaft 611, the transmission direction of the timing belt 6223 coincides with the rotation direction of the eccentric shaft 611. It is understood that in other embodiments, when the central axis of the output shaft 6211 of the electric control element 621 deviates to other angles from the central axis of the eccentric shaft 611, the central axis of the driving wheel 6221 and the central axis of the driven wheel 6222 may also form other angles, for example, a vertical arrangement or a cross belt transmission formed by the synchronous belt 6223, as long as the electric control element 621 can control the eccentric shaft 611 to rotate by a preset angle through the transmission of the synchronous belt 6223.

It is to be understood that the present invention is not limited to the transmission assembly 622 only being able to adopt the belt transmission manner; in other embodiments, the transmission assembly 622 may also adopt one or more of chain transmission, worm gear, gear transmission and other transmission modes.

In this embodiment, the electric control element 621 is a stepping motor. It is understood that in other embodiments, the electrical control element 621 may be replaced by other electrically driven elements besides the stepper motor. As long as the electric drive element can realize electric control.

In an embodiment of the present invention, the adjusting assembly 61 further includes a shaft sleeve 613, the shaft sleeve 613 is sleeved on the concentric section 6111 of the eccentric shaft 611 and fixed on the housing 10, and the shaft sleeve 613 is used for bearing the eccentric shaft 611, providing 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 an embodiment of the present invention, two retaining rings 614 are respectively disposed on two sides of the adjusting slider 612, the two retaining rings 614 are 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, the retaining rings 614 are used to fix the position of the adjusting slider 612 on the eccentric shaft 611, so as to prevent the adjusting slider 612 from deviating out of the sliding groove 418 due to vibration.

Further, the retainer ring 614 is fixed on the eccentric section 6112 of the eccentric shaft 611 by means of screw compression. Of course, the retainer ring 614 may also be fixed to the eccentric shaft 611 by other methods such as gluing, riveting, etc., as long as the retainer ring 614 can be firmly fixed to the eccentric section 6112 of the eccentric shaft 611; the adjustment slider 612 may also employ other elements to achieve its own position limit, and the retainer ring 614 may be omitted.

In order to reset the inclination angle and height of the feed dog frame, so that the overedger 100 can reset the feed dog frame 41 at each time of starting or adjusting, the overedger 100 is further provided with a sensing assembly 63, the sensing assembly 63 is used for sensing and detecting the deflection angle of the eccentric shaft 611, the sensing assembly 63 is electrically connected with a control member, the control member is electrically connected with a driver, and the driver is connected with the eccentric shaft 611 and can drive the eccentric shaft 611 to rotate.

The sensing assembly 63 senses and acquires the deflection angle of the eccentric shaft 611 continuously, when the feed dog frame needs to be reset, the control element drives the driver to operate, the operation of the driver can drive the correspondingly connected eccentric shaft 611 to rotate until the eccentric shaft 611 is located at the preset angle of the control element, and the eccentric rotation of the eccentric shaft 611 can drive the feed dog frame 41 to reset, so that the whole reset process of the feed dog frame 41 is realized.

Wherein, the rotation angle of the eccentric shaft 611 during the resetting process is calculated by the control component according to the detection result of the sensing assembly 63 and the preset angle, that is, the deviation amount between the detection result of the sensing assembly 63 on the deflection angle of the eccentric shaft 611 and the preset angle is the rotation angle of the eccentric shaft 611 during the resetting process.

It should be noted that the angle preset by the control member refers to the target angle to which the eccentric shaft 611 needs to be adjusted, and the feed dog 41 is at the target inclination and height. In the present embodiment, the preset angle refers to an angle of the eccentric shaft 611 when the feed dog 41 is horizontal, and the feed dog 41 is in a horizontal position at this time. Of course, in other embodiments, the preset angle may be other angles than those described above, and the specific selection value of the preset angle may be selected according to the actual operating condition requirement.

In the embodiment, the driver is selected as the electric control element 621, so that the overedger 100 is prevented from being additionally provided with the driver, the number of parts of the whole overedger is reduced, and the compactness of the whole overedger is improved; the control element is selected as the control center of the overedger 100, the control center simultaneously controls the operation of each actuating mechanism of the overedger 100, and the control element is selected as the control center of the overedger 100, so that the requirement for additionally arranging the control element can be avoided, the number of parts of the whole machine is reduced, and the compactness of the whole machine is improved.

At this time, the sensing assembly 63 senses and acquires the deflection angle of the eccentric shaft 611 continuously, when the feed dog frame needs to be reset, the whole machine control center which controls the operation of each actuating mechanism of the overedger 100 drives the electric control element 621 to operate, the electric control element 621 operates and drives the eccentric shaft 611 to rotate to the preset angle position of the control center through the transmission assembly 622, and the rotation of the eccentric shaft 611 drives the feed dog frame 41 to reset to the target inclination angle and height, so that the reset process is realized.

It is understood that the present invention does not limit the driver to be selected as the electric control element 621, and in other embodiments, the overedger 100 may further include an additional motor, an additional cylinder or an additional electromagnet to adjust the rotation angle of the eccentric shaft 611; the utility model discloses do not also restrict the control and only can select the complete machine control center for overedger 100, in other embodiments, overedger 100 can also set up extra control such as controlling element, control chip and realize the control to electrical control element 621 and the processing of response subassembly 63 detected signal.

In the present embodiment, the sensing assembly 63 detects the rotation angle of the eccentric shaft 611 by using the hall effect. The sensing assembly 63 includes a hall sensor 631 and a magnetic element (not shown), the magnetic element is connected to the eccentric shaft 611 and can change position with the change of the deflection angle of the eccentric shaft 611; the hall sensor 631 can sense a magnetic field around itself, and when the position of the magnetic member changes, the hall sensor 631 can calculate the position change amount of the magnetic member according to the change amount of the magnetic field around itself; when the offset between the magnetic member and the hall sensor 631 corresponds to the current angle of the eccentric shaft 611, the hall sensor 631 can detect the current deflection angle of the eccentric shaft 611 through the change of the magnetic field caused by the magnetic member.

In one embodiment of the present invention, the magnetic member is a magnetic steel. It will be appreciated that in other embodiments, the magnetic member may be a magnetic element other than magnetic steel.

In this embodiment, in order to realize the fixed connection between the magnetic element and the eccentric shaft 611, the magnetic element is disposed on the connecting element 632, the connecting element 632 is substantially in a strip shape, one end of the connecting element is fixed and clamped on the concentric section 6111 of the eccentric shaft 611, and the other end of the connecting element extends out of the eccentric shaft 611 and extends into the space between the hall sensor 631 and the housing 10.

Specifically, one end of the connecting piece 632, which is away from the eccentric shaft 611, is provided with a groove (not shown), and the magnetic member is embedded and fixed in the groove and corresponds to the hall sensor 631. It is understood that in other embodiments, the magnetic member may be fixed at other positions of the eccentric shaft 611 by bonding, screwing, or the like, as long as the magnetic member can be disposed on the connection piece 632 and can be detected by the hall sensor 631.

By providing the connector 632 connected to the eccentric shaft 611 between the eccentric shaft 611 and the hall sensor 631, the connector 632 can support and fix the magnetic member, and the connector 632 can enlarge the rotation angle of the eccentric shaft 611, which is helpful to improve the detection accuracy of the hall sensor 632. Of course, the magnetic member may be directly provided on the eccentric shaft 611, and the connecting member 632 may be omitted.

The sensing assembly 63 forms a corresponding relationship between the rotation angle of the eccentric shaft 611 and the position of the magnetic member by the mutual connection between the magnetic member and the eccentric shaft 611, and the specific position of the magnetic member can be detected and obtained by the hall sensor 631, so that the sensing assembly 63 is utilized to detect and obtain the parameter of the current rotation angle of the eccentric shaft 611.

The hall sensor 631 is electrically connected to the above-mentioned control element, the hall sensor 631 can send the rotation angle parameter obtained by the hall sensor 631 to the above-mentioned control element, and the control element controls the electric control element 621 to rotate to a preset angle according to the parameter, so as to realize the reset process of the feed dog frame 41.

It can be understood that the present invention is not limited to the hall effect to detect the rotation angle of the eccentric shaft 611; in other embodiments, sensing component 63 may also use other devices and principles such as an angle sensor, a gyroscope, etc. to detect the rotation angle of eccentric shaft 611.

Further, in order to restrict the rotation angle of the eccentric shaft 611, avoid the eccentric shaft 611 to rotate too big angle and make the magnetic part move too big distance when shutting down, cause the magnetic part to leave the problem of the detection range of the hall sensor 631, the utility model provides an overedger 100 has seted up the spacing groove 633 on the casing 10, and the spacing groove 633 is seted up for fan-shaped, and the connecting piece 632 follows the radial extension of fan-shaped spacing groove 633 and only can rotate at limited angular range.

In this embodiment, the rotatable angle range of the connecting element 632 is limited to 0 to 120 °, that is, the fan-shaped central angle range of the limiting groove 633 is 0 to 120 °; it is understood that in other embodiments, the range of angles over which the connector 632 can rotate can be set to other angles than those described above.

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.

The utility model provides a hemming machine 100 can detect the turned angle of eccentric shaft 611 through setting up and control electric connection's response subassembly 63 for at every turn the start or detect preceding work feed dog frame 41 and can reset to initial position, thereby ensure the accuracy of follow-up regulation, the operational capability of the whole machine of hemming machine 100 promotes, has extensive application prospect.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims (10)

1. The overedger is characterized by comprising a cloth feeding tooth frame and a cloth feeding tooth frame adjusting mechanism connected to the cloth feeding tooth frame, wherein the cloth feeding tooth frame adjusting mechanism comprises an adjusting component and an operating component, the adjusting component comprises an eccentric shaft connected to the cloth feeding tooth frame, and the eccentric shaft is driven by the operating component to rotate and adjust the inclination angle and the height of the cloth feeding tooth frame;

the overedger comprises an induction component, a driver and a control component, wherein the induction component is used for inducing the rotation angle of the eccentric shaft, the driver is connected to the eccentric shaft and can drive the eccentric shaft to rotate, the control component is electrically connected to the driver and can control the driver to operate, the control component controls the driver to operate according to the detection result of the induction component, and the driver drives the eccentric shaft to rotate to a preset angle and resets the cloth feeding tooth frame.

2. The overlock machine according to claim 1, wherein the sensing assembly comprises a hall sensor and a magnetic member, the hall sensor and the magnetic member are oppositely disposed, the magnetic member is connected to the eccentric shaft, and the hall sensor detects a rotation angle of the eccentric shaft through the movement of the magnetic member along with the eccentric shaft.

3. The overlock machine of claim 2, wherein said magnetic member is magnetic steel.

4. The overlock machine as claimed in claim 2, wherein a connecting member is provided between said eccentric shaft and said magnetic member, said connecting member having one end connected to said eccentric shaft and the other end carrying said magnetic member.

5. The overlock machine as claimed in claim 4, wherein a groove is formed in the connecting piece, and the magnetic piece is embedded in the groove and arranged corresponding to the Hall sensor.

6. The overlock machine according to claim 4, wherein the overlock machine has a housing provided with a limit groove receiving the connecting member, the limit groove limiting a rotation angle of the eccentric shaft by limiting a swing angle of the connecting member.

7. The overlock machine as claimed in claim 6, wherein said limiting groove has a fan shape, and said connecting member has a bar shape and extends in a radial direction of said limiting groove.

8. The overlock machine as claimed in claim 1, wherein said adjusting assembly comprises an adjusting slider embedded in said feed dog carrier and capable of sliding with respect to said feed dog carrier, said eccentric shaft having a concentric section and an eccentric section connected to said concentric section, said eccentric section of said eccentric shaft passing through said adjusting slider and being in rotational fit with said adjusting slider;

the operation assembly comprises an electric control element and a transmission assembly, and the electric control element controls the eccentric shaft to rotate under the transmission action of the transmission assembly and drives the adjusting slide block to adjust the inclination angle and the height of the cloth feeding tooth rack;

the overedger is provided with a control center, and the control center is used for controlling the operation of each component of the overedger.

9. Overlock machine according to claim 8, wherein said drive is integrated with said electric control element and/or

The control member is integrated with the control center.

10. The overlock machine of claim 8, wherein said drive assembly is at least one of a chain drive, a belt drive, a gear drive, and a worm drive.