CN109371577B

CN109371577B - Feed dog frame adjustment mechanism and overedger using same

Info

Publication number: CN109371577B
Application number: CN201811378748.XA
Authority: CN
Inventors: 郭红华; 宋国庆; 赵林蔚; 徐永明
Original assignee: Jack Technology Co Ltd
Current assignee: Jack Technology Co Ltd
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2024-05-28
Anticipated expiration: 2038-11-19
Also published as: CN109371577A

Abstract

The invention provides a feed dog frame adjusting mechanism which is used for adjusting a feed dog frame in an overedger, the feed dog frame adjusting mechanism comprises an adjusting component and an operating component, the adjusting component comprises an adjusting slide block and an eccentric shaft, the adjusting slide block is embedded in the feed dog frame and can slide relative to the feed dog frame, the eccentric shaft is provided with a concentric section and an eccentric section connected with the concentric section, the eccentric section of the eccentric shaft penetrates through the adjusting slide block and is in rotating fit with the adjusting slide block, the operating component comprises a control element, the control element is rotationally connected with the concentric section of the eccentric shaft, and the control element adjusts the inclination angle and the height of the feed dog frame by changing the rotation quantity of the control element. The invention also provides an overedger applying the feed dog frame adjusting mechanism. The feed dog frame adjusting mechanism provided by the invention can adjust the dip angle and the height of the feed dog frame; the overedger using the feed dog frame adjusting mechanism has the advantages of improved sewing quality and wide application prospect.

Description

Feed dog frame adjustment mechanism and overedger using same

Technical Field

The invention relates to the technical field of sewing, in particular to a feed dog frame adjusting mechanism and an overedger using the same.

Background

The overedger is mainly used for overlock sewing of textiles and has wide application in the sewing field. 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 hauled to the machine head to complete the whole feeding process. However, the existing overedger can only process cloth with specific thickness, when thick materials are sewn, layering of the cloth or too dense stitch can be caused due to insufficient cloth feeding tooth frame mop force, and when thin materials are sewn, stitch folds can be caused due to too much feeding. The overedger can not adapt to cloth with different thickness degrees, and restricts the development and the application of the overedger.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a feed dog adjustment mechanism that accommodates different thickness cloth by adjusting the inclination angle and the height of the feed dog, and that improves the processing quality of the overedger and improves the capability of flexible manufacturing of the overall system, and an overedger using the same.

The invention provides a feed dog frame adjusting mechanism which is used for adjusting a feed dog frame in an overedger, the feed dog frame adjusting mechanism comprises an adjusting component and an operating component, the adjusting component comprises an adjusting slide block and an eccentric shaft, the adjusting slide block is embedded in the feed dog frame and can slide relative to the feed dog frame, the eccentric shaft is provided with a concentric section and an eccentric section connected with the concentric section, the eccentric section of the eccentric shaft penetrates through the adjusting slide block and is in rotating fit with the adjusting slide block, the operating component comprises a control element, the control element is connected with the concentric section of the eccentric shaft, and the control element adjusts the inclination angle and the height of the feed dog frame by changing the rotation quantity of the control element.

Further, the control element is an electric control element, and the electric control element changes the rotation quantity of the control element and adjusts the inclination angle and the height of the feed dog frame in an electric control mode.

Further, the operation assembly further comprises a fixing seat, wherein the fixing seat carries the electric control element and is arranged at the shell of the overedger.

Further, the control element is a control rod, and the control rod changes the rotation quantity of the control rod and adjusts the inclination angle and the height of the feed dog frame in a manual control mode.

Further, the operation assembly comprises a locking disc, a sliding groove is formed in the locking disc, and the control rod is connected to the locking disc and can slide in the sliding groove.

Further, a state identifier is further arranged on the locking disc, and the state identifier is used for identifying the inclination angle and the height state of the feed dog frame and guiding the operation of operators.

Further, a lock nut is further arranged on the lock disc, and the lock nut is fixedly connected to the control rod and limits the control rod to move in the extending direction of the vertical sliding groove.

Further, the operation assembly further comprises a transmission assembly, the transmission assembly is arranged between the concentric section of the eccentric shaft and the control element, and the control element drives the eccentric shaft to rotate through the transmission assembly.

Further, the transmission assembly comprises a worm wheel and a worm, the worm wheel is sleeved on the concentric section of the eccentric shaft, the worm is sleeved on the output shaft of the control element, and meshing rotation between the worm wheel and the worm drives the eccentric shaft to rotate.

Further, the transmission assembly comprises a connecting pin, a transmission crank, a guide piece and a sliding block, one end of the transmission crank is connected with the connecting pin, the other end of the transmission crank is connected with the sliding block, the connecting pin is opposite to one end of the transmission crank and is connected with the control element, the guide piece penetrates through the sliding block, the sliding block is rotationally connected with the adjusting assembly, and the sliding block slides along the guide piece under the driving of the transmission crank and drives the adjusting assembly to rotate.

The invention also provides an overedger, which comprises a feed dog and a feed dog regulating mechanism connected with the feed dog, wherein the feed dog regulating mechanism is any one of the feed dog regulating mechanisms.

According to the feed dog frame adjusting mechanism provided by the invention, the inclination angle and the height of the feed dog frame can be adjusted, so that the feed dog frame can change the feed state of the feed dog to the cloth according to the thickness degree of different cloths. The overedger using the feed dog frame adjusting mechanism improves the sewing quality, improves the flexible manufacturing capacity of the whole machine system, and has wide application prospect.

Drawings

Fig. 1 is a schematic structural view of the overedger provided by the invention after omitting part of the structure;

FIG. 2 is a schematic view of the overedger of FIG. 1 after a housing;

FIG. 3 is an exploded schematic view of the overedger of FIG. 2;

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

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

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

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

FIG. 8 is a schematic view of the feed mechanism of FIG. 7 in another view;

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

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

FIG. 11 is a schematic view of the differential volume adjustment mechanism of the overedger of FIG. 2;

FIG. 12 is a schematic view of a feed dog frame adjustment mechanism in the overedger of FIG. 2;

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

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 frame in a normal operating state;

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

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

FIG. 16 is a schematic view showing a structure of a feed dog frame adjusting mechanism according to a second embodiment of the present invention;

Fig. 17 is an exploded view of the feed dog adjustment mechanism of fig. 16.

Description of the main reference signs

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

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted 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 an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements 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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or/and" as used herein 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 the overedger 100 according to the present invention, in which a part of the structure is omitted, fig. 2 is a schematic structural view of the overedger 100 shown in fig. 1, in which the housing 10 is omitted, and fig. 3 is an exploded schematic view of the overedger 100 shown in fig. 2. Overedger 100 is primarily used for overlock sewing of textiles, has a wide range of applications in industrial and home sewing, and is an extremely important and precise sewing machine.

The overedger 100 provided by the invention comprises a casing 10, a main shaft 20, a presser foot mechanism 30, a cloth feeding mechanism 40 and a machine head (not shown), wherein the main shaft 20 is arranged in the casing 10 and connected with the cloth feeding mechanism 40 and the machine head, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head are all arranged on the casing 10, and the presser foot mechanism 30 is opposite to the cloth feeding mechanism 40 and is arranged close to the machine head.

The casing 10 is used for carrying 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), the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head can be driven by the power source to operate, the presser foot mechanism 30 is used for pressing cloth transported by the cloth feeding mechanism 40 to improve quality and quality of sewing processing, the cloth feeding mechanism 40 is used for transporting cloth to be processed, and the machine head is used for sewing the cloth transported by the cloth feeding mechanism 40. The cloth feeding mechanism 40 is driven by the main shaft 20 to reciprocally convey the cloth, and then the cloth is properly tensioned by the presser foot mechanism 30, so that the machine head can perform sewing processing on the cloth in a good tensioning state, thereby completing the sewing and serging process of the overedger 100.

Of course, in addition to the above-mentioned housing 10, main shaft 20, presser foot mechanism 30, cloth feeding mechanism 40 and machine head, auxiliary mechanisms such as thread passing mechanism and lubricating mechanism are also provided in the overedger 100 to achieve smooth completion of the sewing process of the overedger, and will not be described herein.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the housing 10 shown in fig. 1. The housing 10 is generally box-shaped and has a complex shape to match the installation and movement of the various components in the overedger 100, and the housing 10 separates the spindle 20, the presser foot mechanism 30, the cloth feed mechanism 40, and the machine head from the external environment, so as to protect the actuators inside the overedger and avoid the operator from touching the moving parts of the actuators by mistake, thereby protecting the operation safety of the operator.

The shell 10 is provided with a main shaft hole 11 corresponding to the main shaft 20, and the main shaft hole 11 is used for installing and fixing the main shaft 20; the housing 10 is also provided with a cavity for accommodating a power source, and the cavity is communicated with the spindle hole 11. The medial side of the housing 10 is concave and defines a working space 12, the working space 12 providing an active area of the feed mechanism 40 such that the feed mechanism 40 can reciprocate within the area of the working space 12 to continuously feed material to the handpiece. The casing 10 is further provided with a needle plate 13 for sewing cloth, the needle plate 13 is approximately a flat plate, the upper surface of the needle plate is a cloth bearing surface, namely a working plane 131 for sewing and serging, the cloth feeding mechanism 40 moves reciprocally and elliptically in the working space 12, so that the cloth is continuously lifted above the working plane 131 or falls below the working plane 131, the cloth can be dragged in the lifting process of the cloth feeding mechanism 40, the position of the cloth can be reset in the falling process, and the cloth feeding mechanism 40 can be lifted and lowered repeatedly and continuously.

The outer side surface of the housing 10 may be further provided with an operation port and a cover (not shown) rotatably connected to the side surface of the housing 10 near the operation port, the rotation of the cover being capable of closing or opening the operation port, and a part of the adjusting mechanism of the overedger 100 being provided inside the housing 10 near the operation port. When the lid opens the operation opening, a part of the adjustment mechanism can be exposed from the operation opening, and when the lid closes the operation opening, the part of the adjustment mechanism is also closed to the housing 10. This is the case. When the overedger 100 requires parameter adjustment, an operator can turn over and open the cover, thereby exposing the internal parameter adjustment assembly, and the operator can adjust through the exposed adjustment assembly. The cover isolates a portion of the adjustment mechanism of the overedger 100 from the external environment, enabling better protection of the overedger based on meeting adjustment requirements.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the spindle 20 shown in fig. 2, in which the spindle 20 penetrates through a spindle hole 11 formed in the housing 10, and the spindle 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 central axis X, and the position of the central axis X is fixed relative to the housing 10, that is, the main shaft 20 does fixed-axis rotation around the central axis X.

The main shaft 20 comprises an eccentric shaft section 21 which is eccentrically arranged so as to be connected with a transmission mechanism (not shown) of the eccentric shaft section 21, the rotation of the main shaft 20 drives the eccentric shaft section 21 to eccentrically rotate around a central axis X, and the eccentric rotation of the eccentric shaft section 21 transmits power to each executing mechanism through the transmission mechanism, so that the driving operation of the executing mechanism is realized; the power transmission of the eccentric shaft sections 21 on the main shaft 20 also realizes the operation and coordination of different execution mechanisms in the overedger 100.

Referring to fig. 6, fig. 6 is a schematic structural diagram of the presser foot mechanism 30 shown in fig. 2, in which the presser foot mechanism 30 is installed in the housing 10 and 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 moderately tensioned state, and the quality of the sewing process of the machine head is improved.

The presser foot mechanism 30 includes a presser foot shaft 31, a presser foot arm 32, a presser foot support 33, and a presser foot plate 34, the presser foot shaft 31 is mounted on the housing 10 so as to be rotatable with respect to the housing 10, one end of the presser foot shaft 31 is connected to the presser foot arm 32, the presser foot support 33 is provided on the other end of the presser foot arm 32 with respect to the presser foot shaft 31, and the presser foot plate 34 is provided on the presser foot support 33 so as to be rotatable with respect to the presser foot 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 foot arm 32 is used for supporting the presser foot bracket 33; the presser foot support 33 is for supporting the presser foot plate 34. The presser foot shaft 31 rotates, and the presser foot plate 34 rotates relative to the presser foot bracket 33, so that the presser foot plate 34 is adjusted in two axes.

The machine head is arranged in a part of the shell 10 opposite to the working space 12 and is adjacent to the presser foot mechanism 30, the machine head can rotate under the drive of the main shaft 20 and control an internal needle (not shown) and a curved needle (not shown) to act through crank transmission, so that the needle does regular up-and-down linear motion, the curved needle does regular reciprocating swing, and the machine head forms a stitch through the mutual matching of the needle and the curved needle, thereby finishing the sewing and serging operation of textiles.

Referring to fig. 7 to 8, fig. 7 is a schematic structural diagram of the cloth feeding mechanism 40 shown in fig. 2, and fig. 8 is a schematic structural diagram of the cloth feeding mechanism 40 shown in fig. 7 under another view angle. The feed mechanism 40 includes two feed racks 41, a first transmission assembly 42, a second transmission assembly 43 and a third transmission assembly 44, wherein the number of the feed racks 41 is two, namely an active feed rack 411 and a differential feed rack 412, the first transmission assembly 42 is connected to the active feed rack 411 and the differential feed rack 412, and the first transmission assembly 42 can rotate under the drive of the spindle 20 to drive the active feed rack 411 and the differential feed rack 412 to reciprocate in a linear motion in a first direction; the second transmission assembly 43 is disposed between the first transmission assembly 42 and the differential feed dog frame 412, and the second transmission assembly 43 can drive the differential feed dog frame 412 to reciprocate in the second direction under the driving of the first transmission assembly 42; the third transmission assembly 44 is disposed between the second transmission assembly 43 and the active feeding tooth frame 411, and the third transmission assembly 44 can drive the active feeding tooth frame 411 to reciprocate in the second direction under the driving of the second transmission assembly 43.

In this embodiment, the first direction is a vertical direction, and the second direction is a horizontal direction perpendicular to the vertical direction. It will be appreciated that the first direction may also be other directions inclined to the vertical and the second direction may also be other directions inclined to the horizontal; the first direction and the second direction can be mutually perpendicular, can also take other angles, and the first direction and the second direction can be correspondingly arranged according to actual production needs.

The active feed dog 411 is driven by the first transmission component 42 to reciprocate in a first direction, and driven by the second transmission component 43 to reciprocate in a second direction, and the active feed dog 411 is overlapped with the movements in the two directions and shows a spatial reciprocating circular motion.

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

Since the dragging stroke of the active feed dog 411 and the differential feed dog 412 on 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 is relatively larger in the lateral upward stroke, and the stroke in the first direction is relatively smaller, and the active feed dog 411 and the differential feed dog 412 are spatially represented as elliptical motion in a reciprocating manner.

The motion of the active feed dog 411 and the differential feed dog 412 after being higher than the working plane 131 can drag the cloth, the motion after falling into the working plane 131 can reset the dragging 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 the machine head, the active feed dog 411 and the differential feed dog 412 convey the cloth into the machine head, the machine head performs sewing processing on the current cloth segment after the active feed dog 411 and the differential feed dog 412 feed, and the feed dog 41 continues to drag the next cloth segment after the machine head finishes processing the current cloth, so that the cycle is circulated and continuous operation is realized.

The feed dog 41 is provided with a feed dog 413 for dragging a cloth, the feed dog 413 can pass through the needle plate 13 under the drive of the reciprocating elliptical motion of the feed dog 41 and is matched with the presser foot plate 34 in the presser foot mechanism 30, the feed dog 413 compresses the cloth by being mutually abutted with the presser foot plate 34 and moving in the first direction, and drags the cloth by moving in the second direction. The feed dog 413 includes a driving dog 4131 provided on the driving feed dog 411 and a differential dog 4132 provided on the differential feed dog 412, the driving feed dog 411 is provided with a driving dog 4131 for dragging the cloth, and the driving dog 4131 has a serrated surface to increase the dragging force to the cloth; differential feed dog 412 is provided with differential teeth 4132 for pulling the cloth, and differential teeth 4132 are also provided with a serrated surface to increase the pulling force on the cloth. The driving teeth 4131 and the differential teeth 4132 are arranged at intervals, the gap between the driving teeth 4131 and the differential teeth 4132 is used for providing a processing space for a machine head on the machine head, and the machine head on the machine head can process cloth at the gap between the driving teeth 4131 and the differential teeth 4132, so that the sewing operation is completed.

In the present embodiment, the active feed dog 411 and the differential feed dog 412 are relatively synchronized in movement in the first direction and are not synchronized in movement in the second direction, so that the overedger 100 obtains a better sewing effect. Of course, the active feed dog 411 and the differential feed dog 412 may also move synchronously.

In order to ensure the stability and reliability of the active feed dog 411 and the differential feed dog 412 in the feed process, the casing 10 is further provided with an oil baffle 414 and a guide rail 415 for cooperating the active feed dog 411 and the differential feed dog 412 to move, wherein the oil baffle 414 is approximately shaped like 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 the space range of the central hole. It will be appreciated that in order to ensure smooth movement of the active feed dog 411 and the differential feed dog 412, the aperture of the central aperture of the oil baffle 414 is matched to the dimensions and movement of the active feed dog 411 and the differential feed dog 412. The two sides of the oil baffle 414 are correspondingly contacted with the sides of the active feed dog 411 and the differential feed dog 412, and the sides of the oil baffle 414 can scrape the 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 direct contact between the flow of the lubricating oil infiltration and the cloth are avoided.

The guide rail 415 is substantially concave, is fixedly disposed at the housing 10 and is nested in the active feed dog 411 and the differential feed dog 412, and the guide rail 415 is used for improving stability of movement of the active feed dog 411 and the differential feed dog 412, so as to avoid movement 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), and the through holes are used for oiling, so that not only can the lubricating oil on the feed dog 41 be conveniently infiltrated, but also 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.

The end of the active feed dog 411 far away from the active dog 4131 and the end of the differential feed dog 412 far away from the differential dog 4132 are extended outwards to 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 extension arms 416 parallel to each other are used for adjusting the overall angle of the feed dog 41.

The active feed dog 411 and the differential feed dog 412 are provided with a substantially middle portion thereof with a "mouth" shaped chute (not numbered) for engaging the first transmission assembly 42 so that the first transmission assembly 42 drives the active feed dog 411 and the differential feed dog 412 to reciprocate in a first direction.

In addition, the differential feed dog holder 412 is further provided with a sliding slot 417 along the first direction, and the sliding slot 417 is used for embedding and sliding a part of the structure of the second transmission assembly 43, so as to realize the reciprocating linear motion of the differential feed dog holder 412 in the second direction. The active feed dog 411 is further provided with a through hole (not numbered) for connecting and embedding the third transmission assembly 44, so as to realize mutual fixation between the third transmission assembly 44 and the active feed dog 411.

Referring to fig. 9, fig. 9 is an exploded view of the 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 kinetic energy of the main shaft 20 and driving the active feed dog 411 and the differential feed dog 412 to reciprocate in a linear motion along a first direction.

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

The vertical driving slider 421 is substantially block-shaped, and a through hole is formed at a substantially 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 slide block 421 is embedded in the central chute 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 of the main shaft can make the eccentric shaft section 21 eccentrically rotate, so that the vertical driving slide block 421 sleeved on the eccentric shaft section 21 is driven to do parallel rotation in the circumferential direction. Since the vertical driving slider 421 is disposed at the chute formed inside the feed dog frame 41, the vertical driving slider 421 will slide reciprocally along the chute under the guidance of the chute, that is, the motion of the vertical driving slider 421 in the lateral direction is released by the chute inside the feed dog frame 41, and the vertical driving slider 421 only drives the feed dog frame 41 to reciprocate in the first direction, thereby realizing the process of driving the feed dog frame 41 to reciprocate along the first direction by the spindle 20.

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 mutually matched and used for driving the second transmission component 43 to move, so that a power source is provided for the second transmission component 43 to drive the active feed dog 411 and the differential feed dog 412 to reciprocate in the lateral direction. The eccentric wheel 422 is fixed on the main shaft 20 and can rotate under the drive of the main shaft 20; one end of the feeding connecting rod 423 is sleeved on the eccentric wheel 422 and is rotationally connected with the eccentric wheel 422, and the other end is connected with the second transmission assembly 43. The eccentric wheel 22 is sleeved on the straight shaft section of the main shaft 20, and the rotation driving of the main shaft 20 is represented by eccentric rotation of the eccentric wheel 22 around the main shaft 20 due to the eccentric arrangement of the eccentric wheel 22; 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 turnover motion of the feeding connecting rod 423, and the eccentric wheel 22 and the feeding connecting rod 423 form a crank-rocker mechanism, thereby driving the second transmission assembly 43 to swing reciprocally.

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, where the relative positions of the eccentric 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 actuators within the overedger 100, which are not 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 in the first transmission assembly 42, and the other end is connected to the differential feeding rack 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 lateral driving slider 435, wherein the cloth feeding shaft 431 penetrates the differential cloth feeding crank 432 and is mounted on the housing 10, and the second transmission assembly 43 can be disposed at the housing 10 in a stable state by the bearing of the cloth feeding shaft 431. The cloth feed shaft 431 is further provided with bushings (not numbered) at both ends thereof, through which the cloth feed shaft 431 is fixed to the housing 10 and is rotatable 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 a cavity defined by the connecting block 433 and the cover 434. The differential feed crank 432 is rotatably connected to the feed link 423 in the first transmission assembly 42, and the swing of the feed link 423 drives the differential feed crank 432 to reciprocally rotate. The differential feed crank 432 is further provided with a plurality of through holes at the long side portion, and the through holes are used for oil passing, so that lubricating oil can infiltrate the differential feed crank 432 well.

The connecting block 433 and the cover plate 434 are fixed with each other, and an opening for the long side of the differential cloth feeding crank 432 to extend in is formed between the connecting block 433 and the cover plate 434; the position of the connecting block 433 facing the lateral driving sliding block 435 is convexly provided with a protrusion (not numbered), the corresponding positions of the connecting block 433 and the cover plate 434 are provided with screw holes (not numbered), and the connecting block 433 and the cover plate 434 can be mutually fixed through threaded fasteners.

The lateral driving sliding block 435 is embedded in a sliding groove 417 which is further formed in the differential feed dog frame 412 along the first direction, the approximate center position of the lateral driving sliding block 435 is hollow, and the hollow part of the lateral driving sliding block 435 is used for embedding a protrusion on the connecting block 433, so that the rotating connection between the connecting block 433 and the lateral driving sliding block 435 is realized.

Along with the transmission of the first transmission assembly 42 to the second transmission assembly 43, the feeding link 423 drives the differential feeding crank 432 in the second transmission assembly 43 to swing reciprocally under the driving of the main shaft 20, and the differential feeding crank 432 and the feeding shaft 431 are fixed to each other, so that the differential feeding crank 432 and the feeding shaft 431 swing reciprocally in an integral manner. The long end of the differential feed crank 432 extends into the space enclosed by the connecting block 433 and the cover plate 434, and the swing of the differential feed crank 432 drives the connecting block 433, the cover plate 434 and the lateral driving slider 435 to do reciprocating swing.

Because the lateral driving slider 435 is capable of sliding in the sliding groove 417 of the differential feed dog holder 412, the spatial swing of the lateral driving slider 435 is respectively a reciprocating sliding motion of the lateral driving slider 435 along the sliding groove 417 and a reciprocating rectilinear motion of the lateral driving slider 435 in the extending direction of the vertical sliding groove 417, and because the lateral driving slider 435 is disposed on the differential feed dog holder 412, the reciprocating rectilinear motion of the lateral driving slider 435 in the extending direction of the vertical sliding groove 417 drives the differential feed dog holder 412 to reciprocate rectilinear motion in the lateral direction perpendicular to the first direction, so as to realize the process that the second transmission component 43 drives the differential feed dog holder 412 to reciprocate rectilinear motion in the lateral direction under the driving of the first transmission component 42.

By opening the slide 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 slider 435 and the connection block 433, so as to avoid the differential feed crank 432 from being able to rotate to form motion interference.

Referring to fig. 10, fig. 10 is an exploded view of the third transmission assembly 44 of the 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 is rotationally connected with the connecting rod 442, the connecting rod 442 is arranged 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 piece (not numbered) arranged on the active cloth feeding crank 441, the other end 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 tooth frame 411, so that the interconnection between the third transmission assembly 44 and the active cloth feeding crank 441 is realized.

The active feed crank 441 is provided with a chute (not numbered) which is arc-shaped and extends in a first direction, a connecting pin (not numbered) for connecting one end of the connecting rod 442 is embedded in the chute, the active feed crank 441 is connected to the connecting rod 442 through the connecting pin, and the active feed crank 441 releases a motion component in the first direction through the connecting rod 442, so that the combined motion of the active feed crank 441 in the vertical and lateral directions only transmits the lateral motion to the active feed rack 411.

Through holes are formed in two opposite ends of the connecting rod 442, one of the two through holes is used for embedding the connecting rod sleeve 443, and the other is used for embedding the connecting pin on the active cloth feeding crank 441. The connecting rod 442 can drive the active feed dog 411 to reciprocate in a straight line in a lateral direction perpendicular to the first direction under the connection of the driving action of the active feed crank 441 and the connecting rod sleeve 443.

The cloth feeding shaft 431 connects the active cloth feeding rack 411 and the differential cloth feeding rack 412, so that the motion sources of the active cloth feeding rack 411 and the differential cloth feeding rack 412 are kept consistent, and only the initial positions or lengths of the structures in the second transmission assembly 43 and the third transmission assembly 44 need to be adjusted, so that the active cloth feeding rack 411 and the differential cloth feeding rack 412 have different motion tracks and are kept level 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 active feed dog 411 and the differential feed dog 412 have the same driving source, which is beneficial to keeping the synchronization of the movement forms of the active feed dog 411 and the differential feed dog 412, and the problem that a plurality of driving sources respectively drive the active feed dog 411 and the differential feed dog 412 to move, so that the vertical movement and the lateral movement are asynchronous is avoided.

Of course, if synchronization is not considered, the elliptical motion of the active feed dog 411 and the differential feed dog 412 may be driven by a plurality of driving sources.

Referring to fig. 11, fig. 11 is a schematic structural view of the differential adjusting mechanism 50 in the overedger 100 shown in fig. 2. In order to realize the adjustment of the differential motion between the active feed dog 411 and the differential feed dog 412, the overedger 100 is further provided with a differential motion adjusting mechanism 50, wherein the differential motion adjusting mechanism 50 includes an adjusting lever 51, a differential crank 52, and a differential link 53, one end of the differential link 53 is pivotally connected to the differential crank 52, the other end is connected to a cover plate 434 in the second transmission assembly 43, and one end of the differential crank 52 is connected to the adjusting lever 51, which can swing, adjust and rotate on the adjusting lever 51 and drive the differential link 53 to move. One end of the adjusting lever 51 is fixedly connected to the differential crank 52, and the adjusting lever 51 adjusts the positional relationship of the differential link 53 by changing the angle thereof.

The adjusting lever 51 rotates around the connection point of the adjusting lever 51 and the differential crank 52 under the adjustment of an operator, the rotation of the adjusting lever 51 drives the differential crank 52 fixedly connected with the adjusting lever to rotate, and the differential crank 52 rotates to drag the differential link plate 53 to move. Because the differential link 53 is rotatably connected to the cover plate 434 of the second transmission assembly 43, the differential link 53 is driven by the differential crank 52 to rotate about the cover plate 434 and slide integrally with the cover plate 434 along the chute 417. The position of the lateral driving sliding block 435 fixedly connected with the connecting block 433 and the cover plate 434 in the chute 417 is changed under the driving of the differential connecting piece 53, so that the initial movement position of the lateral driving sliding block 435 is changed, the movement state of the differential feed dog 412 is changed as the actual movement of the lateral driving sliding block 435 is decomposed laterally, and the adjustment of the difference between the active feed dog 411 and the differential feed dog 412 is realized.

In order to further improve the convenience of differential quantity adjustment, the differential quantity adjustment mechanism 50 provided by the invention further comprises an adjustment panel 54 arranged on the outer side of the shell 10, a chute (not numbered) is formed on the adjustment panel 54, the adjustment rod 51 is fixedly connected with a sliding block (not numbered) arranged in the chute, and an adjustment piece 541 is fixedly arranged on the sliding block, and an operator can adjust the swinging position of the adjustment rod 51 by operating the adjustment piece 541, so that the operation of the operator is facilitated.

Further, a status indicator such as a dial may be provided on the adjustment panel 54, so as to facilitate visualization and quantization of the adjustment difference.

The differential amount adjusting mechanism 50 provided by the invention is also provided with a fixed shaft 521 on the differential crank 52, wherein the fixed shaft 521 is fixedly arranged in the shell 10 and is fixedly connected with the adjusting 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 axial screw 522 can also achieve reliable connection between the differential crank 52 and the adjustment lever 51, 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 adjustment 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 adjustment mechanism 60 shown in fig. 12 in another view, and fig. 14 is an exploded schematic structural view of the feed dog adjustment 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 thickness, the capability of flexible manufacturing of the whole machine system is improved, the overedger 100 is further provided with a cloth feeding rack adjusting mechanism 60, the cloth feeding rack adjusting mechanism 60 is connected to the cloth feeding rack 41, the angle and the height of the cloth feeding rack 41 are adjusted, the feeding state of the cloth with different thickness is changed by using the cloth feeding rack 413, the cloth is in a proper tensioning state, and therefore the sewing effect of the cloth with different thickness is improved.

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

Under the control action 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 whole inclination of the feed dog 413 can change the height of the feed dog 413, and the feed dog 413 adapts to the cloth with different thickness degrees through the change of the height and the inclination angle.

The adjusting assembly 61 comprises an eccentric shaft 611 and an adjusting slide block 612, the eccentric shaft 611 is connected to the operating assembly 62, the adjusting slide block 612 is sleeved on the eccentric shaft 611 and embedded at two parallel extension arms 416 on the feed dog 41, and the eccentric shaft 611 can drive the adjusting slide block 612 to act under the driving of the operating assembly 62, so that the angle of the feed dog 41 is adjusted.

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 shell 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, and the eccentric section 6112 and the concentric section 6111 are offset by a preset distance, and the eccentric section 6112 can rotate under the driving of the concentric section 6111.

The adjusting slide block 612 is in a block shape, the inside of the adjusting slide block 612 is hollow and sleeved with an eccentric section 6112 of the eccentric shaft 611, the adjusting slide block 612 is embedded between the two parallel extension arms 416, the adjusting slide block 612 is rotationally connected with the eccentric section 6112 of the eccentric shaft 611, and the eccentric section 6112 of the eccentric shaft 611 rotates to drive the adjusting slide block 612 to rotate in parallel.

Since 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 slides 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 only drives the extension arms 416 to rise or fall 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 spindle 20, so that the extension arm 416 can rise or fall in the first direction to drive the feed dog 41 to incline, and the inclination angle of the feed dog 41 is determined by the distance that the extension arm 416 moves in the first direction.

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

The control element 621 is rotatably connected with the transmission assembly 622, the rotation quantity 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 the 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 operation assembly 62 includes 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 the height of the feed dog 413.

In the first embodiment of the present invention, the control element 621 is an electric control element 6211, and 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 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 the rotation of the worm wheel 6222 drives the eccentric shaft 611 to rotate due to the fixed connection between the worm wheel 6222 and the eccentric shaft 611, so that the adjustment of the angle and the height of the feed dog 413 is realized.

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

The output shaft of the electric control element 6211 is provided with a groove (not numbered) recessed along the radial direction, the screw passes through the worm wheel 6222 and then abuts against the bottom wall of the groove, and the worm wheel 6222 can be driven to rotate by rotating the output shaft of the electric control element 6211 through the groove.

In this 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 perpendicular to the central axis of the worm wheel 6222. It will be appreciated 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 deflected to other angles, the central axis of the worm 6221 and the central axis of the worm wheel 6222 may also form other angles, for example, may be coaxially disposed.

Of course, the worm wheel 6222 is fixed on the concentric segment 6111 by other fixing methods besides screw compression, and the worm 6221 can also be fixed on the electric control element 6211 by other fixing methods besides screw compression; so long as the securing means enables reliable connection of the worm 6221 and worm wheel 6222.

The overedger 100 provided by the invention does not limit the mode that the transmission component 622 must adopt worm and gear transmission; in other embodiments, the transmission assembly 622 may also employ other types of transmissions such as belt drives, rack and pinion, couplings, and the like; the transmission assembly 622 may be omitted when the electric control element 6211 is not required to directly rotate the eccentric shaft 611 via 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 as to realize the angle and height adjustment of the feed dog frame 41.

In this embodiment, the electronic control element 6211 is a motor. It will be appreciated that in other embodiments, the electrically controlled element 6211 may be replaced by other electrically driven elements besides an electric motor. As long as the electrically driven element is capable of achieving electric control.

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

Of course, in other embodiments, the electric control element 6211 and the fixing seat 623, and the fixing seat 623 and the housing 10 may be fixed by glue, riveting, or other methods; the electric control element 6211 may be fixed to the housing 10 by other structures, and the fixing base 623 may be omitted.

In one embodiment of the invention, the adjustment assembly 61 further comprises a bushing 613, the bushing 613 being sleeved over the concentric segment 6111 of the eccentric shaft 611 and being fixed to the housing 10, the bushing 613 being adapted to carry the eccentric shaft 611, providing a stable rotational environment for the eccentric shaft 611. The shaft sleeve 613 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, sleeve 613 is a copper sleeve. It will be appreciated that in other embodiments, the sleeve may be made of materials other than copper; the sleeve 613 may also be provided with rolling bearings, regardless of cost and operating conditions for low speed rotation.

In one embodiment of the present invention, two first check rings 614 are disposed on two sides of the sleeve, and the two first check rings 614 are disposed at two opposite ends of the shaft sleeve 613, where the first check rings 614 are used to fix the position of the shaft sleeve 613 on the eccentric shaft 611, so as to avoid the sleeve from being shifted due to vibration.

Further, the first retainer 614 is secured to the concentric segment 6111 of the eccentric shaft 611 by screw compression. Of course, the first retainer ring 614 may be fixed to the eccentric shaft 611 by other manners such as glue, riveting, etc., so long as the first retainer ring 614 can be firmly fixed to the concentric segment 6111 of the eccentric shaft 611; other elements may be used to limit the copper sleeve, and the first retainer 614 may be omitted.

In one embodiment of the present invention, two second check rings 615 are respectively disposed at two sides of the adjusting slide 612, the two second check rings 615 are disposed at two sides of the adjusting slide 612 opposite to each other, and are sequentially sleeved on the eccentric section 6112 of the eccentric shaft 611 together with the adjusting slide 612, and the second check rings 615 are used for fixing the position of the adjusting slide 612 on the eccentric shaft 611, so as to prevent the adjusting slide 612 from deviating from 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 in a screw-pressing manner. Of course, the second retainer ring 615 may be fixed on the eccentric shaft 611 by other manners such as glue, riveting, etc., so long as the second retainer ring 615 can be firmly fixed on the eccentric section 2 of the eccentric shaft 611; other elements may be used for the adjusting slide 612 to achieve self-limiting, and the second retainer ring 615 may be omitted.

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

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 overall inclination of the feed dog frame 41 is changed, the inclination of the feed dog 413 is changed by the change of the overall inclination of the feed dog frame 41, that is, the driving dog 4131 and the differential dog 4132 are changed from horizontal level to oblique level, and as the driving dog 4131 and the differential dog 4132 feed the cloth in different elliptical tracks respectively, the sewing effect of the machine head is changed by the change of the height caused by the inclination of the angle between the driving dog 4131 and the differential dog 4132.

Referring to fig. 15a to 15c, fig. 15a is a schematic diagram of the feed dog 41 in a normal working state, fig. 15b is a schematic diagram of the feed dog 41 in a thick working state, and fig. 15c is a schematic diagram of the feed dog 41 in a thin working state. In the figure, the sign S indicates the elliptical motion trajectories of the driving teeth 4131 and the differential teeth 4132, V indicates the tangential direction of the driving teeth 4131 and the differential teeth 4132 when they cut the working plane, and F indicates the elastic force direction of the driving teeth 4131 and the differential teeth 4132 on the cloth.

(1) When the feed dog 41 is in the normal operation state: the feed dog frame 41 is not inclined, the driving teeth 4131 are horizontally flush with the differential teeth 4132, the driving teeth 4131 and the differential teeth 4132 synchronously contact the cloth, at the moment, the direction of the elastic force F acting on the cloth by the driving teeth 4131 and the differential teeth 4132 is the same as the cutting angle direction when the driving teeth 4131 and the differential teeth 4132 cut out a working plane, and the cutting angle direction is the vertical direction.

(2) When the feed dog frame 41 is in a thick material working state: the feed dog holder 41 is inclined so that the height of the active dog 4131 is lower than that of the differential dog 4132, and at this time, the direction of the elastic force F acting on the cloth by the active dog 4131 and the differential dog 4132 still keeps the vertical direction, but the cutting angle direction when the active dog 4131 and the differential dog 4132 cut out of the working plane does not keep the vertical direction any more, and feed 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, so that the driving teeth 4131 and the differential teeth 4132 have a certain catch-up effect relative to the driving teeth 4131 when the cloth is conveyed, a pushing effect on the cloth is formed, thick materials such as multiple layers, stem seams and the like are smoothly fed, the needle distance is uniform, and the sewing quality is better.

(3) When the feed dog 41 is in the thin material working state: the feed dog holder 41 is inclined so that the height of the active dog 4131 is higher than that of the differential dog 4132, and at this time, the direction of the elastic force F acting on the cloth by the active dog 4131 and the differential dog 4132 still keeps the vertical direction, but the cutting angle direction when the active dog 4131 and the differential dog 4132 cut out the working plane does not keep the vertical direction any more, and the active dog 4131 and the differential dog 4132 feed the cloth in a beveling way;

because 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 cloth in advance, and the cloth feeding efficiency of the driving teeth 4131 is higher than that of the differential teeth 4132, so that the driving teeth 4131 and the differential teeth 4132 have a certain distance effect relative to the differential teeth 4132 when the cloth is conveyed, a dragging effect on the cloth is formed, thin materials such as gauze and the like are flat and not wrinkled, and the sewing quality is better.

Referring to fig. 16 and 17, fig. 16 is a schematic structural view of a feed dog adjustment mechanism 60a according to a second embodiment of the present invention, and fig. 17 is an exploded schematic view of the feed dog adjustment 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 here.

In the second embodiment of the present invention, the adjusting mechanism 61 includes, in addition to the eccentric shaft 611 and the adjusting slider 612, an adjusting crank 613a, where the eccentric shaft 611, the adjusting slider 612 and the adjusting crank 613a extend in a lateral direction perpendicular to the length direction of the feed dog 41, the eccentric shaft 611 is threaded with the adjusting slider 612 and the adjusting crank 613a, the adjusting slider 612 is sleeved on the eccentric shaft 611 and is embedded on the feed dog 41 at two parallel extension arms 416, and the adjusting crank 613a is fixedly sleeved on the eccentric shaft 611 and is connected to the operating assembly 62a. The adjusting crank 613a drives the eccentric shaft 611 to rotate under the driving of the operating component 62a, the rotation of the eccentric shaft 611 drives the adjusting slide block 612 to move, and the feed dog frame adjusting mechanism 60 drives the feed dog frame 41 to adjust the height and the inclination angle of the feed dog frame through the movement of the adjusting slide block 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 outwards along the radial direction of the eccentric shaft 611 and is in rotary connection with the operating assembly 62a, a through hole (not numbered) is formed in the part, extending outwards along the radial direction of the eccentric shaft 611, of the adjusting crank 613a, the adjusting crank 613a is rotationally 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 this embodiment, the adjustment crank 613a is pressed against the concentric segment 6111 of the eccentric shaft 611 by a threaded fastener (not numbered). It will be appreciated that in other embodiments, the adjustment crank 613a may also be secured to the concentric segment 6111 of the eccentric shaft 611 by riveting, cementing, or the like.

In the present embodiment, the adjustment crank 613a is fixed to the eccentric shaft 611 by screw tightening. It will be appreciated that the adjustment crank 613a may be fixed to the eccentric shaft 611 by glue, riveting, or the like, as long as the adjustment crank 613a can be firmly fixed to the eccentric shaft 611.

In this embodiment, the adjusting crank 613a is further provided with a through hole (not numbered) for matching with the operating component 62a, and the through hole is used for embedding part of the structure of the operating component 62a, so as to fix part of the structure of the operating component 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 slide block 612 rotatably connected with the eccentric section 6112 of the eccentric shaft 611 to act, the action of the adjusting slide block 612 is divided into sliding along the length direction of the feed dog frame 41 in the sliding groove 418 and lifting or lowering in the vertical direction, and the lifting or lowering of the adjusting slide block 612 drives one end of the feed dog frame 41 to lift or lower, so that the inclination angle and the height of the feed dog frame 41 are changed.

In the second embodiment of the present invention, the adjusting assembly 61a further includes a first shaft sleeve 614a, wherein the first shaft sleeve 614a is sleeved on the concentric segment 6111 of the eccentric shaft 611 and fixed on the housing 10, and the first shaft sleeve 614a is used for bearing the eccentric shaft 611, so as to provide a stable rotation environment of 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 will be appreciated that in other embodiments, the sleeve may be made of materials other than copper; the first sleeve 614a may also be provided as a rolling bearing, regardless of cost and operating conditions for low speed rotation.

In the second embodiment of the present invention, the operating component 62a is disposed on the side surface of the housing 10 perpendicular to the length direction of the feed dog frame 41, so that the operation of an operator can be facilitated, the operator can adjust the inclination angle and the height of the feed dog frame 41 without turning over the cover body, the adjustment is convenient and quick, and the processing efficiency is improved.

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

In the second embodiment of the present invention, the control element 621 is a control rod 6212, the control rod 6212 can rotate relative to the transmission assembly 622, and the operator adjusts the inclination angle of the feed dog frame 41 by the rotation amount of the control rod 621 relative to the transmission assembly 622.

In a second embodiment of the present invention, the transmission assembly 622 transmits the amount of rotation of the lever 6212 via a pin transmission,

The transmission assembly 622 includes a connecting pin 6221a, a transmission crank 6222a, a guide member 6223a and a slider 6224a, one end of the transmission crank 6222a is rotatably connected to the connecting pin 6221a, the other end is rotatably connected to the slider 6224a, the slider 6224a is embedded on the guide member 6223a and slides relative to the guide member 6223a under the guiding action of the guide member 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 of the transmission crank 6222a and the slider 6224a, and part of the movement component of the adjustment crank 613a is released through the sliding of the slider 6224a on the guide member 6223a, so that the power transmission of the rotational amount of the control lever 6212 is realized.

In the second embodiment of the present invention, in order to further improve the operation convenience of the operator, the operation assembly 62a further includes a locking plate 623a, where the locking plate 623a is fixedly disposed on a side surface of the housing 10 perpendicular to the length direction of the feed dog frame 41, and a sliding slot 6231a for sliding the control element 621 is formed on the locking plate 623a, and sliding 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 sliding the control element 621, thereby improving the adjustment efficiency.

Further, a status identifier 6232a is further provided on the locking disc 623a, where the status identifier 6232a is used to guide the operation of the operator and inform the operator of the current adjustment status. The status identifier 6232a may be a directional arrow to direct manual operation by the operator, or may be written, such as "high" or "low" or "large" to identify the current adjustment status. Of course, the state identifier 6232a may also be used to represent the current adjustment state by a dial or other identifier means other than an arrow or a text.

Further, a lock nut 6233a fixedly connected to an end of the control element 621 remote from the connecting pin 6221 is further provided on the lock plate 623a, and the lock nut 6233a is fixedly connected to the control element 621 and restricts movement of the control element 621 in the extending direction of the vertical chute 6231 a. The lock nut 6233a can slide in the sliding groove 6231a under the direct operation of an operator, the lock nut 6233a is used for enabling the operator to manually and directly contact, the condition that the operator needs to directly break the long and thin rod-shaped control element 621 to operate the control element 621 is avoided, and the convenience of operation is further improved.

In the second embodiment of the present invention, the transmission assembly 622 further includes a fixing member 6227a embedded in an end of the connecting pin 6221a remote from the control element 621a, and the fixing member 6227a can fix the transmission crank 6222a at a side position of the housing 10, so as to realize axial limitation of the connecting pin 6221a and the transmission crank 6222 a.

The feed dog frame adjusting mechanism 60 provided by the second embodiment of the invention adopts the control rod 6212 as an element directly operated by an operator, the control rod 6212 can realize manual direct operation by 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 operating component is further disposed on the casing 10 and exposed through the notch on the cover body, so that the operating component can be exposed on the casing 10, the operating component can be operated by operators conveniently, the operators can adjust the inclination angle and the height of the feed dog frame 41 without turning over the cover body, and the adjustment is convenient and quick, so that the machining efficiency is improved.

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

It should be noted that, the two embodiments provided in the present invention may be mutually engaged, for example, the setting position of the operating component, the specific transmission mode of the transmission structure, etc. may be replaced with each other, so long as the replacement of the two embodiments does not affect the implementation of the inclination angle and the height adjustment of the feed dog 41 by the feed dog adjusting mechanism 60.

The feed dog holder adjusting mechanism 60 provided by the invention can adjust the inclination angle and the height of the feed dog holder 41, so that the feed dog holder 41 can change the feeding state of the feed dog 413 on the cloth according to the thickness degree of different cloth. The overedger 100 using the feed dog frame adjusting mechanism 60 improves the sewing quality, improves the flexible manufacturing capacity of the whole system, and has wide application prospect.

It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. The utility model provides a feed dog frame adjustment mechanism for adjust the feed dog frame in the overedger, its characterized in that, feed dog frame adjustment mechanism includes adjusting part and operating unit, adjusting part includes adjusting slide and eccentric shaft, adjusting slide inlays and locates in the feed dog frame and can slide relatively feed dog frame, the eccentric shaft have concentric segment and connect in the eccentric segment of concentric segment, the eccentric segment of eccentric shaft wear to establish adjusting slide and with adjusting slide normal running fit, operating unit includes control element and drive assembly, drive assembly set up in the concentric segment of eccentric shaft with connect eccentric shaft with control element, control element passes through drive assembly drives the eccentric shaft rotates, control element adjusts through the inclination and the height of self feed dog frame, be provided with on the feed dog frame and be used for dragging the inclination under operating unit's the control action, adjusting part is according to the thickness of cloth adjust correspondingly the inclination of feed dog frame the inclination change according to the thickness of cloth the change the overall inclination can not change by the feed dog frame the inclination.

2. The feed dog adjustment mechanism of claim 1, wherein the control element is a control lever that changes the amount of rotation of itself and adjusts the tilt and height of the feed dog by manual control.

3. The feed dog adjustment mechanism of claim 2, wherein the operating assembly includes a lock plate having a chute formed therein, the lever being connected to the lock plate and being slidable within the chute.

4. A feed dog adjustment mechanism according to claim 3, wherein the locking disc is further provided with a status indicator for indicating the tilt and height status of the feed dog and directing the operation of the operator.

5. The feed dog adjustment mechanism of claim 4, wherein the lock plate is further provided with a lock nut fixedly attached to the control rod and limiting movement of the control rod in a direction perpendicular to the direction of chute extension.

6. The feed dog frame adjustment mechanism of claim 1, wherein the drive assembly includes a worm gear and a worm, the worm gear is sleeved on the concentric section of the eccentric shaft, the worm is sleeved on the output shaft of the control element, and the meshing rotation between the worm gear and the worm drives the eccentric shaft to rotate.

7. The feed dog frame adjustment mechanism of claim 1, wherein the drive assembly includes a connecting pin, a drive crank, a guide member, and a slider, one end of the drive crank is connected to the connecting pin, the other end is connected to the slider, one end of the connecting pin opposite to the drive crank is connected to the control element, the guide member is threaded through the slider, the slider is rotatably connected to the adjustment assembly, and the slider slides along the guide member under the drive of the drive crank and drives the adjustment assembly to rotate.

8. An overedger comprising a feed dog and a feed dog adjustment mechanism coupled to the feed dog, wherein the feed dog adjustment mechanism is a feed dog adjustment mechanism according to any one of claims 1 to 7.