CN209353051U - Cloth feeding dog frame adjustment mechanism and overlock sewing machine using the mechanism - Google Patents

Abstract

The utility model provides a cloth feeding dog frame adjustment mechanism, which is installed on the casing of an overlock machine, and the side of the casing is rotatably provided with a cover body, and the cloth feeding dog frame adjusting mechanism includes an adjustment assembly and Operation component, one end of the adjustment component is connected to the feed dog frame, and the other end is connected to the operation component. The operation component controls the action of the adjustment component to adjust the inclination and height of the cloth feed dog frame. on the body and exposed through the gap. The utility model also provides an overlock sewing machine using the above-mentioned cloth feeding dog frame adjustment mechanism. The cloth feeding dog frame adjustment mechanism provided by the utility model can adjust the inclination and height of the cloth feeding dog frame, and the operating components in the cloth feeding dog frame adjusting mechanism are exposed on the housing, which is more convenient for operators to operate. The overlock sewing machine using the above-mentioned cloth feed dog adjustment mechanism can improve the sewing quality and the flexible manufacturing capability of the whole machine system, and has wide application prospects.

Description

Cloth feeding dog frame adjustment mechanism and overlock sewing machine using the mechanism

technical field

The utility model relates to the technical field of sewing, in particular to a cloth feeding dog frame adjustment mechanism and an overlock sewing machine using the mechanism.

Background technique

Overlock sewing machine is mainly used for overlock sewing of textiles, and has a wide range of applications in the field of sewing. The feeding process of the overlock sewing machine mainly depends on the reciprocating elliptical motion of the feed dog. The overlock sewing machine continuously lifts and pulls the cloth on the needle plate through the feed dog, so that the cloth to be processed is continuously dragged to the machine. head to complete the entire feeding process. However, the current overlock sewing machine can only process fabrics of a specific thickness. When sewing thick fabrics, the cloth will be layered or the stitches are too dense due to the insufficient mopping force of the cloth feed dog. When sewing thin fabrics, it will Stitch puckering due to overfeeding. Overlock sewing machines cannot adapt to fabrics of different thicknesses, which restricts the development and application of overlock sewing machines.

Utility model content

In view of this, it is necessary to provide a cloth feed dog adjustment mechanism and an overlock sewing machine using the mechanism. The cloth feed dog adjustment mechanism can adapt to different thicknesses of cloth by adjusting the inclination and height of the cloth feed dog. The processing quality of the machine is improved, and the ability of flexible manufacturing of the whole machine system is improved.

The utility model provides a cloth feeding tooth frame adjustment mechanism, the cloth feeding tooth frame adjustment mechanism is installed on the casing of an overlock sewing machine, the side of the casing is rotatably provided with a cover body, and the cloth feeding tooth frame The adjustment mechanism includes an adjustment component and an operation component. One end of the adjustment component is connected to the feed dog frame, and the other end is connected to the operation component. The operation component controls the action of the adjustment component to adjust the feed dog The inclination angle and the height of the frame, a notch is opened on the cover, and the operating component is arranged on the housing and exposed through the notch.

Further, the operating assembly includes a control element, and a transmission structure is provided between the control element and the adjustment assembly, and the control element drives the adjustment assembly to move through the transmission structure, and the control element is installed on It is arranged on the housing and corresponding to the notch.

Further, the control element is a control rod, and the rotation of the control rod around the adjustment assembly drives the adjustment assembly to adjust the inclination and height of the feed dog.

Further, the operating assembly includes a locking disc, and a sliding slot is opened on the locking disc, and one end of the control rod opposite to the adjusting assembly is connected to the locking disc and can slide in the sliding slot .

Further, the locking disc is also provided with a state mark, which is used to mark the inclination angle and height state of the feed dog frame, and guide the operation of the operator.

Further, a locking nut is further provided on the locking disc, and the locking nut is fixedly connected to the control rod and limits the movement of the control rod in the direction of extending vertically to the chute.

Further, the adjustment assembly includes an adjustment slider and an eccentric shaft, the adjustment slider is embedded in the feed dog frame and can slide relative to the cloth feed dog frame, the eccentric shaft has a concentric section and a connecting In the eccentric section of the concentric section, the eccentric section of the eccentric shaft passes through the adjustment slider and is in rotation with the adjustment slider. The control rod controls the rotation of the eccentric shaft and drives the adjustment slider Adjust the inclination and height of the feed dog.

Further, a retaining ring is provided on both sides of the adjusting slider, and the retaining ring is used to limit the position of the adjusting slider on the eccentric shaft.

Further, the transmission structure includes a groove opened on the eccentric shaft, and the control rod is embedded in the groove.

The utility model also provides an overlock sewing machine, which includes a cloth feeding dog frame and a cloth feeding dog frame adjusting mechanism connected to the cloth feeding dog frame, and the cloth feeding dog frame adjusting mechanism is the feeding dog frame described in any one of the above-mentioned items. Cloth rack adjustment mechanism.

The cloth feeding tooth frame adjustment mechanism provided by the utility model can adjust the inclination and height of the cloth feeding tooth frame, and the operating components in the cloth feeding tooth frame adjustment mechanism are exposed on the housing, which is more convenient for operators to operate , the operator can adjust the inclination and height of the feeding dog frame without opening the cover, and the adjustment is convenient and quick. The overlock sewing machine using the above-mentioned feed dog adjustment mechanism can improve the sewing quality and the flexible manufacturing capability of the whole machine system, and has wide application prospects.

Description of drawings

Fig. 1 is the schematic diagram of the structure of the overlock sewing machine provided by the utility model after omitting part of the structure;

Fig. 2 is an exploded schematic view of the overlock sewing machine shown in Fig. 1;

Fig. 3 is a schematic structural view of the overlock sewing machine shown in Fig. 2 after the shell is omitted;

Fig. 4 is a structural schematic diagram of the housing shown in Fig. 1;

Fig. 5 is the structural representation of main shaft shown in Fig. 2;

Fig. 6 is a structural schematic diagram 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 structural schematic diagram of the cloth feeding mechanism shown in Fig. 7 under another viewing angle;

Fig. 9 is an exploded schematic diagram of the cloth feeding mechanism shown in Fig. 7;

Fig. 10 is an exploded schematic view of the third transmission assembly in the cloth feeding mechanism shown in Fig. 8;

Fig. 11 is a structural schematic diagram of the differential amount adjusting mechanism in the overlock sewing machine shown in Fig. 2;

Fig. 12 is a structural schematic diagram of the adjusting mechanism of the feed dog frame in the overlock sewing machine shown in Fig. 2;

Fig. 13 is a structural schematic diagram of the adjusting mechanism of the cloth feeding dog frame shown in Fig. 12;

Fig. 14 is an exploded schematic diagram of the adjusting mechanism of the cloth feeding dog shown in Fig. 12;

Fig. 15a is a schematic diagram of the principle when the cloth feed dog is in a normal working state;

Fig. 15b is a schematic diagram of the principle when the cloth feeding tooth frame is in the thick material working state;

Fig. 15c is a schematic diagram of the principle when the cloth feed dog is in a thin material working state.

Description of main component symbols

The following specific embodiments will further illustrate the utility model in conjunction with the above-mentioned accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that when a component is said to be "mounted on" another component, it may be directly mounted on another component or there may be an intervening component. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time. When a component is said to be "fixed" to another component, it may be directly fixed to the other component or there may be an intervening component at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Please refer to Fig. 1 and Fig. 3, Fig. 1 is a schematic structural view of the overlock sewing machine 100 provided by the present invention after omitting part of the structure, Fig. 2 is an exploded schematic view of the overlock sewing machine 100 shown in Fig. 1, and Fig. 3 is a schematic diagram of the overlock sewing machine shown in Fig. 1 A schematic structural view of the overlock sewing machine 100 omitting the housing 10 . The overlock sewing machine 100 is mainly used for overlock sewing of textiles, and is widely used in industry and household sewing, and is an extremely important and precise sewing machine.

The overlock sewing machine 100 provided by the utility model includes a housing 10, a main shaft 20, a presser foot mechanism 30, a cloth feeding mechanism 40 and a machine head (not shown in the figure), and the main shaft 20 is arranged inside the housing 10 and connected to 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 housing 10, and the presser foot mechanism 30 is opposite to the cloth feeding mechanism 40 and arranged near the machine head.

The housing 10 is used to carry the main shaft 20, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head. The main shaft 20 is connected to a power source (not shown), and can drive the presser foot mechanism 30, cloth feeding The mechanism 40 and the machine head are running, the presser foot mechanism 30 is used to press the cloth transported by the cloth feeding mechanism 40 to improve the quality and quality of sewing processing, the cloth feeding mechanism 40 is used to transport the cloth to be processed, and the machine head is used to feed cloth for sewing The cloth delivered by mechanism 40. The main shaft 20 drives the cloth feeding mechanism 40 to reciprocate the cloth, and then the presser foot mechanism 30 properly tensions the cloth, and the machine head can sew the cloth in a good tension state, thereby completing the sewing lock of the overlock sewing machine 100 side process.

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 a thread passing mechanism and a lubricating mechanism will also be set in the overlock sewing machine 100 to realize overlock sewing. The successful completion of the process will not be repeated here.

Please also refer to FIG. 4 , which is a schematic structural diagram of the housing 10 shown in FIG. 1 . The housing 10 is roughly box-shaped, and has a complex shape to match the installation and movement of different components in the overlock sewing machine 100. 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. , can protect the executive mechanism inside the overlock sewing machine, and prevent the operator from accidentally touching the moving parts of the actuator, so as to protect the operating safety of the operator.

The housing 10 is provided with a main shaft hole 11 corresponding to the main shaft 20 , and the main shaft hole 11 is used for mounting and fixing the main shaft 20 ; The middle part of the side of the housing 10 is concave and forms a working space 12. The working space 12 provides the active area of the cloth feeding mechanism 40, so that the cloth feeding mechanism 40 can reciprocate in the area of the working space 12, thereby continuously providing head to feed the fabric. The housing 10 is also provided with a needle plate 13 for sewing cloth. The needle plate 13 is roughly a flat plate, and its upper surface is a cloth bearing surface, that is, a working plane 131 for sewing and hemming operations. The cloth feeding mechanism 40 is working The space 12 reciprocates in an elliptical motion, thereby continuously rising above or falling below the working plane 131. The cloth feeding mechanism 40 can drag the cloth during the rising process, and can reset its position during the descending process. The cloth feeding mechanism 40 cycles of rising and falling can realize continuous feeding process.

The outer surface of the housing 10 is also provided with a cover 14, an operation port 15 is formed between the cover 14 and the housing 10, the cover 14 is rotatably connected to the side of the housing 10, the upper surface of the cover 14 is in contact with the working plane 131 flush, the rotation of the cover body 14 can close or open the operation port 15 . Part of the adjustment mechanism of the overlock sewing machine 100 is arranged inside the housing 10 and near the operation port 15. When the cover body 14 opens the operation port 15, part of the adjustment mechanism can be exposed from the operation port 15. When the cover body 14 closes the operation port 15 At this time, part of the adjustment mechanism is also enclosed in the housing 10 .

in this way. When the parameters of the overlock sewing machine 100 need to be adjusted, the operator can turn over and open the cover 14, so that the internal parameter adjustment components are exposed, and the operator can adjust through the exposed adjustment components. The cover body 14 isolates part of the adjustment mechanism of the overlock sewing machine 100 from the external environment, and can better protect the overlock sewing machine on the basis of meeting adjustment requirements.

The cross-section of the cover body 14 is roughly "L" shape, and it includes two plates arranged obliquely to each other, named as the first plate 141 and the second plate 142 respectively, the first plate 141 and the second plate 142 are connected to each other, the first The plate surface of the plate 141 is approximately parallel to the upper side of the housing 10, the second plate 142 is approximately parallel to the outer surface of the housing 10, and the end of the first plate 141 away from the needle plate 13 is rotationally connected to the housing 10, so that the cover The body 14 can rotate relative to the casing 10 and open or close the above-mentioned operation port 15 .

The length of the second plate 142 is shorter than that of the first plate 141 , because the length of the second plate 142 is shorter than the length of the first plate 141 , a gap 143 relative to the first plate 141 is formed on the second plate 142 . When the cover 14 is fully opened, one end of the second plate 142 abuts against the outer surface of the housing 10, and the notch 143 is closed. The notch is used to prevent the second plate 142 from rotating, preventing the second plate 142 from being unable to rotate due to assembly interference.

Please refer to FIG. 5 together. FIG. 5 is a schematic structural view of the main shaft 20 shown in FIG. 2 . The main shaft 20 passes through the main shaft hole 11 provided on the housing 10 . The various executive agencies in the operation. The main shaft 20 has a central axis X, and the main shaft 20 can rotate around its own central axis X. The position of the central axis X is fixed relative to the housing 10 , that is, the main shaft 20 rotates around the central axis X at a fixed axis.

The main shaft 20 includes an eccentric shaft section 21 arranged eccentrically to connect to the transmission mechanism (not shown in the figure) of the eccentric shaft section 21. The rotation of the main shaft 20 will drive the eccentric shaft section 21 to orbit the central axis X eccentrically. The eccentric shaft section 21 The eccentric orbiting of the transmission mechanism transmits the power to each actuator, thereby realizing the driving operation of the actuator; the power transmission of multiple eccentric shaft sections 21 on the main shaft 20 also realizes the different functions in the overlock sewing machine 100. Operation and coordination of executive agencies.

Please also refer to FIG. 6. FIG. 6 is a schematic structural view of the presser foot mechanism 30 shown in FIG. The cloth delivered by the cloth feeding mechanism 40 makes the cloth in a state of moderate tension, thereby improving the quality of the machine head sewing process.

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 installed on the housing 10 and can rotate relative to the housing 10. One end of the presser foot shaft 31 is connected to On the presser arm 32 , a presser support 33 is disposed on the other end of the presser arm 32 opposite to the presser shaft 31 , and the presser plate 34 is disposed on the presser support 33 and can rotate relative to the presser support 33 . The presser foot shaft 31 is used to drive the presser foot arm 32 to rotate, thereby adjusting the installation angle of the entire presser foot mechanism 30; the presser foot arm 32 is used to support the presser foot support 33; the presser foot support 33 is used to support the presser foot plate 34. The two-axis adjustment of the presser foot plate 34 is realized through the rotation of the presser foot shaft 31 and the rotation of the presser foot plate 34 relative to the presser foot support 33 .

The machine head is arranged in the part opposite to the working space 12 on the housing 10 and is arranged adjacent to the presser foot mechanism 30. The machine head can rotate under the drive of the main shaft 20, and control the inner machine needle (not shown) and The action of the looper (not shown in the figure) makes the needle move up and down in a straight line regularly, and the looper swings back and forth regularly, and the machine head forms stitches through the mutual cooperation of the needle and the looper, thereby completing the sewing and seaming of textiles Operation.

Please refer to FIG. 7 to FIG. 8 together. FIG. 7 is a schematic structural diagram of the cloth feeding mechanism 40 shown in FIG. 2 , and FIG. 8 is a structural schematic diagram of the cloth feeding mechanism 40 shown in FIG. 7 under another viewing angle. The cloth feeding mechanism 40 includes a cloth feeding dog frame 41, a first transmission assembly 42, a second transmission assembly 43 and a third transmission assembly 44. The number of the cloth feeding dog frames 41 is two, which are respectively the active cloth feeding dog frame 411 and the differential The dynamic feed dog frame 412, the first transmission assembly 42 is connected to the active cloth feed dog frame 411 and the differential cloth feed dog frame 412, the first transmission assembly 42 can rotate under the drive of the main shaft 20 to drive the active cloth feed dog frame 411 And the differential feed dog frame 412 reciprocates linearly in the first direction; the second transmission assembly 43 is arranged between the first transmission assembly 42 and the differential feed dog frame 412, and the second transmission assembly 43 can move in the first transmission Driven by the assembly 42, the differential feed dog frame 412 is driven to reciprocate and linearly move in the second direction; the third transmission assembly 44 is arranged between the second transmission assembly 43 and the active cloth feed dog frame 411, and the third transmission assembly 44 can Driven by the second transmission assembly 43, the active cloth feeding dog frame 411 is driven to reciprocate and linearly move in the second direction.

In this embodiment, the first direction is a vertical direction, and the second direction is a horizontal direction perpendicular to the vertical direction. It can be understood that the first direction can also be other directions inclined to the vertical direction, and the second direction can also be other directions inclined to the horizontal direction; the first direction and the second direction can be perpendicular to each other, or can be at other angles. The first direction and the second direction can be correspondingly set according to actual production needs.

Driven by the first transmission assembly 42, the active cloth feeding dog frame 411 reciprocates linearly in the first direction, and is driven by the second transmission assembly 43 to reciprocate linearly in the second direction. The active cloth feeding dog frame 411 moves in two directions. The motion superposition on the surface is expressed as a reciprocating circular motion in space.

The motion form of the differential feeding dog frame 412 is similar to that of the active cloth feeding dog frame 411. The differential feeding dog frame 412 is driven by the first transmission assembly 42 to reciprocate linearly in the first direction, and in the third Driven by the transmission assembly 44, the reciprocating linear motion along the second direction, and the superposition of the motions of the differential feed dog frame 412 in the two directions are manifested as reciprocating circular motions in space.

Since the dragging stroke of the active cloth feeding dog 411 and the differential cloth feeding dog 412 in the second direction is often greater than the movement stroke of the cloth feeding dog 41 in the first direction, so the active cloth feeding dog 411 The reciprocating circular motion of the differential feeding dog frame 412 has a relatively large stroke in the lateral direction, and a relatively small stroke in the first direction. The active cloth feeding dog frame 411 and the differential feeding dog frame 412 are reciprocating in space. elliptical motion.

The movement of the active cloth feeding dog rack 411 and the differential cloth feeding dog rack 412 above the working plane 131 can drag the cloth, and the movement after falling into the working plane 131 can reset its dragging position. The active cloth feeding dog rack 411 The reciprocating elliptical motion of the differential feeding dog frame 412 can cooperate with the movement of the machine head. The active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 convey the cloth into the machine head. After the frame 411 and the differential feed dog frame 412 feed the material, the current cloth section is sewn and processed. After the machine head finishes processing the current cloth, the cloth feed dog frame 41 continues to drag the next piece of cloth, so as to circulate and realize continuous sewing. Operation.

The cloth feed dog 41 is provided with a cloth feed dog 413 for dragging the cloth. The cloth feed dog 413 can pass through the needle plate 13 under the drive of the reciprocating elliptical motion of the cloth feed dog 41, and is connected with the presser foot mechanism 30. The foot plate 34 cooperates, and the cloth feeding dog 413 presses the cloth by abutting against the presser foot plate 34 and moving in the first direction, and drags the cloth by moving in the second direction. The cloth feeding dog 413 includes the active tooth 4131 arranged on the active cloth feeding dog frame 411 and the differential dog 4132 arranged on the differential cloth feeding dog frame 412. Teeth 4131, the active teeth 4131 have a serrated surface to increase the drag force on the cloth; differential teeth 4132 for dragging the cloth are arranged on the differential feeding tooth frame 412, and the differential teeth 4132 are also provided with serrated teeth. surface to increase the drag on the cloth. The active tooth 4131 and the differential tooth 4132 are spaced apart from each other, and the gap between the active tooth 4131 and the differential tooth 4132 is used to provide a processing space for the machine head on the machine head. 4131 and the cloth in the gap between differential teeth 4132 are processed to complete the sewing operation.

In this embodiment, the movement of the active feed dog frame 411 and the differential feed dog frame 412 in the first direction is relatively synchronous, and the movement in the second direction is asynchronous, so that the overlock sewing machine 100 can obtain better sewing Processing effect. Certainly, the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 may also move synchronously.

In order to ensure the stability and reliability of the active cloth feeding dog 411 and the differential feeding dog 412 during the cloth feeding process, the housing 10 is also provided with an active cloth feeding dog 411 and a differential feeding dog. The oil baffle plate 414 and the guide rail 415 that move at 412, the oil baffle plate 414 is roughly in the shape of a "mouth", the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 pass through the center hole of the oil baffle plate 414 and are in the center hole action in the space. It can be understood that in order to ensure the smooth movement of the active cloth feeding dog 411 and the differential feeding dog 412, the diameter of the central hole of the oil baffle 414 and the size and movement of the active cloth feeding dog 411 and the differential feeding dog 412 A match is required. The two sides of the oil baffle plate 414 are in corresponding contact with the sides of the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412, and the sides of the oil baffle plate 414 can scrape off the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 Lubricating oil on the top, to avoid the part where the lubricating oil infiltrates the flow and the fabric is in direct contact, which will cause problems such as fabric contamination.

The guide rail 415 is roughly in the shape of "concave", which is fixedly arranged at the housing 10 and nested in the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412. The guide rail 415 is used to improve the active cloth feeding dog frame 411 and the differential The stability of the movement of the cloth feeding dog 412 avoids the movement deviation between the active cloth feeding dog 411 and the differential feeding dog 412 .

There are also multiple through holes (unlabeled) on the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412. The through holes are used for passing oil, which not only facilitates the infiltration of lubricating oil on the cloth feeding dog frame 41, It can also reduce the weight of the active feed dog frame 411 and the differential feed dog frame 412 , which helps to reduce the weight of the overlock sewing machine 100 as a whole.

The end of the active feed dog frame 411 away from the active tooth 4131 and the end of the differential feed dog frame 412 away from the differential tooth 4132 both extend outward and form two parallel extension arms 416, between the two parallel extension arms 416 A sliding groove 418 extending along the length direction of the feed dog 41 is formed between them, and two mutually parallel extension arms 416 are provided for adjusting the overall angle of the feed dog 41 .

The approximate middle of the active feed dog frame 411 and the differential feed dog frame 412 is provided with a "mouth"-shaped chute (not labeled), which is used to cooperate with the first transmission assembly 42, so that the first transmission assembly 42 drives the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 to perform reciprocating linear motion in the first direction.

In addition, the differential feed dog frame 412 is also provided with a chute 417 along the first direction, and the chute 417 is used for the partial structure of the second transmission assembly 43 to embed and slide, so as to realize the differential feed dog frame 412 in the second direction. Reciprocating linear motion in the direction. The active feeding dog frame 411 is also provided with a through hole (not labeled), which is used for connecting and inserting the third transmission assembly 44 , so as to realize the mutual fixing between the third transmission assembly 44 and the active cloth feeding dog frame 411 .

Please also refer 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 frame 411 and the differential feed dog frame 412. The first transmission assembly 42 is used to transmit the kinetic energy of the main shaft 20 and drive the active cloth feed dog frame 411 and the differential feed dog frame 412. The differential feed dog 412 reciprocates linearly in the first direction.

The first transmission assembly 42 includes a vertical driving slider 421, an eccentric wheel 422, and a feeding connecting rod 423. The vertical driving slider 421 is used to drive the active feeding dog 411 and the differential feeding dog 412 to reciprocate along the first direction. Movement, the eccentric wheel 422 cooperates with the feeding connecting rod 423 to drive the operation of the second transmission assembly 43 .

The vertical driving slider 421 is roughly block-shaped, and a through hole is opened in the approximate center of the vertical driving slider 421 , and the vertical driving slider 421 is sleeved on an eccentric shaft section 21 of the main shaft 20 through the through hole. The vertical drive slider 421 is embedded in the center chute of the "mouth" shaped cloth feed dog frame 41, and is in contact with the inner side wall of the cloth feed dog frame 41. The rotation of the main shaft 20 around its central axis will make the eccentric shaft section 21 rotates eccentrically, which also drives the vertical drive slider 421 sleeved on the eccentric shaft section 21 to perform parallel orbiting in the circumferential direction. Since the vertical drive slider 421 is arranged at the chute provided inside the feed dog frame 41, the vertical drive slider 421 will slide reciprocally along the chute under the guidance of the chute, that is, the vertical drive slider 421 The movement in the side direction is released by the chute inside the feed dog 41, and the vertical drive slider 421 only drives the feed dog 41 to reciprocate linearly in the first direction, so that the main shaft 20 drives the cloth feed dog 41 The process of reciprocating motion in a first direction.

The eccentric wheel 422 and the feeding connecting rod 423 are sleeved on the main shaft 20 in sequence, and the eccentric wheel 422 and the feeding connecting rod 423 cooperate with each other to drive the second transmission assembly 43 to move, thereby driving the active cloth feeding dog for the second transmission assembly 43 The reciprocating linear motion of the frame 411 and the differential feed dog frame 412 in the lateral direction provides a power source. The eccentric wheel 422 is fixed on the main shaft 20 and can rotate under the drive of the main shaft 20; The eccentric wheel 22 (unlabeled) is sleeved on the straight shaft section of the main shaft 20. Due to the eccentric setting of the eccentric wheel 22, the rotational drive of the main shaft 20 is shown as the eccentric rotation of the eccentric wheel 22 around the main shaft 20; 423 is set on the eccentric wheel 22, and the driving effect of the eccentric wheel 22 on the feeding connecting rod 423 is shown as the turnover movement of the feeding connecting rod 423. The eccentric wheel 22 and the feeding connecting rod 423 form a crank rocker mechanism, thereby driving the second transmission Assembly 43 swings back and forth.

In this embodiment, the first transmission assembly 42 also includes an eccentric cam 424 and a ratchet (not labeled) arranged on the eccentric cam 424. The relative position of the eccentric wheel 22 and the feeding link 423 on the main shaft 20 is determined by the eccentric cam 424 and the ratchet. The pawl is fixed; of course, the eccentric cam 424 and the pawl also have the function of adjusting the actuators in the overlock sewing machine 100, and details will not be described here.

Please refer to FIG. 7 and FIG. 8 again, 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 feed dog frame 412 . The second transmission assembly 43 includes a feed shaft 431, a differential feed crank 432, a connecting block 433, a cover plate 434, and a lateral drive slider 435. The feed shaft 431 passes through the differential feed crank 432 and is installed in the casing. 10 , through the bearing of the feeding shaft 431 , the second transmission assembly 43 can be set at the casing 10 in a stable state. The two ends of the cloth feeding shaft 431 are also provided with shaft sleeves (not labeled), through which the cloth feeding shaft 431 is fixed on the housing 10 and can rotate under the bearing of the housing 10 .

The differential feed crank 432 is roughly in the shape of an "L", a part of its short side is fixed to the feed shaft 431, the remaining part of the short side is connected to the feed connecting rod 423 in rotation, and the long side stretches into the connecting block 433 and Inside the cavity surrounded by the cover plate 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 will drive the differential feed crank 432 to rotate reciprocally. The differential feed crank 432 also has a plurality of through holes on the long side, and the through holes are used for passing oil, so that lubricating oil can better infiltrate the differential feed crank 432 .

The connecting block 433 and the cover plate 434 are mutually fixed, and an opening for the long side of the differential feeding crank 432 is enclosed between the two; number), the corresponding positions of the connection block 433 and the cover plate 434 are provided with screw holes (not numbered), and the connection block 433 and the cover plate 434 can be fixed to each other by threaded fasteners.

The lateral driving slider 435 is embedded in the chute 417 provided by the differential feeding dog frame 412 along the first direction, the approximate center position of the lateral driving slider 435 is hollow, and the hollow part of the lateral driving slider 435 is used The protrusions on the connecting block 433 are embedded to realize the rotational connection between the connecting block 433 and the lateral driving slider 435 .

With the transmission of the first transmission assembly 42 to the second transmission assembly 43, the feed link 423 will drive the differential feed crank 432 in the second transmission assembly 43 to swing back and forth under the drive of the main shaft 20, and the differential feed crank 432 and the feed shaft 431 are fixed to each other, and at this time, the differential feed crank 432 and the feed shaft 431 will swing back and forth as a whole. The long end of the differential feed crank 432 extends into the space surrounded by the connecting block 433 and the cover plate 434, and the swing of the differential feed crank 432 will drive the connecting block 433, the cover plate 434 and the lateral drive slider 435 to Do reciprocating swings.

Since the lateral driving slider 435 can slide in the chute 417 of the differential feeding tooth frame 412, the swing of the lateral driving slider 435 in space is respectively caused by the reciprocating sliding of the lateral driving slider 435 along the chute 417. And the reciprocating linear motion of the lateral drive slider 435 on the extension direction of the vertical chute 417, since the lateral drive slider 435 is arranged on the differential feed dog frame 412, the lateral drive slider 435 will move in the vertical chute 417 The reciprocating linear motion in the extension direction will drive the differential feed dog frame 412 to reciprocate and linearly move laterally perpendicular to the first direction, so that the second transmission assembly 43 drives the differential feed tooth frame 412 driven by the first transmission assembly 42 The process of reciprocating linear motion along the side.

Through the opening of the chute 417 , the movement of the lateral driving slider 435 in the first direction is released, and the lateral driving slider 435 only transmits its own movement along the lateral direction to the differential feeding dog frame 412 . It should be noted that the swing angle of the differential feed crank 432 will be released through the rotational connection between the lateral drive slider 435 and the connecting block 433 , so as to avoid movement interference caused by the differential feed crank 432 being unable to rotate.

Please also refer to FIG. 10 . FIG. 10 is an exploded view of the third transmission assembly 44 in 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 is rotatably connected with the connecting rod 442. The connecting rod 442 is arranged on the connecting rod sleeve. Between 443 and the active cloth feed crank 441, one end of the connecting rod 442 is embedded for a connecting piece (not labeled) arranged on the active cloth feed crank 441, and the other end is embedded for the connecting rod sleeve 443, and the connecting rod sleeve 443 wears the connecting rod 442 and is fixed on the active cloth feeding tooth frame 411, so as to realize the mutual connection between the third transmission assembly 44 and the active cloth feeding crank 441.

A chute (not labeled) is opened on the active cloth feeding crank 441, the chute is arc-shaped and extends roughly in the first direction, and a connecting pin (not labeled) for connecting one end of the connecting rod 442 is embedded in the chute, The active cloth feeding crank 441 is connected to the connecting rod 442 through the connecting pin, and the active cloth feeding crank 441 releases the motion component in the first direction through the connecting rod 442, so that the synthetic motion of the active cloth feeding crank 441 in the vertical and lateral directions will only The lateral movement is transmitted to the active feeding dog frame 411.

Both ends of the connecting rod 442 are provided with through holes. One of the two through holes is used for the insertion of the connecting rod sleeve 443 , and the other is used for the insertion of the connecting pin on the active cloth feeding crank 441 . The connecting rod 442 can drive the active cloth feeding dog frame 411 to reciprocate linearly in the lateral direction perpendicular to the first direction under the driving action of the active cloth feeding crank 441 and the connecting action of the connecting rod sleeve 443 .

The feed shaft 431 is connected to the active feed rack 411 and the differential feed rack 412, so that the motion sources of the active feed rack 411 and the differential feed rack 412 are consistent, and only the second transmission assembly 43 and the differential feed rack 412 need to be adjusted. The initial position or length of each structure in the third transmission assembly 44 makes the active feeding dog frame 411 and the differential feeding dog frame 412 have different motion trajectories, and they are kept flush in the vertical position.

Drive the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 to reciprocate in the first direction and lateral direction through the main shaft 20, so that the driving source of the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 is the same, which is beneficial Keep the synchronization of the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 to avoid the occurrence of multiple driving sources respectively driving the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 to move, resulting in vertical and lateral Problems with out-of-sync movements.

Of course, if the synchronization problem is not considered, the elliptical motions of the active cloth feeding dog 411 and the differential feeding dog 412 can also be driven by multiple driving sources respectively.

Please also refer to FIG. 11 . FIG. 11 is a schematic structural diagram of the differential adjustment mechanism 50 in the overlock sewing machine 100 shown in FIG. 2 . In order to realize the adjustment of the differential amount between the active cloth feeding dog frame 411 and the differential cloth feeding dog frame 412 in the overlock sewing machine 100, the overlock sewing machine 100 is also provided with a differential amount adjusting mechanism 50, a differential amount adjusting mechanism 50 It includes an adjustment rod 51, a differential crank 52, and a differential connecting piece 53. One end of the differential connecting piece 53 is pivotally connected to the differential crank 52, and the other end is connected to the cover plate 434 in the second transmission assembly 43. The differential crank 52 One end is connected to the adjusting rod 51, which can adjust the rotation when the adjusting rod 51 swings and drives the differential link 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 connecting piece 53 by changing its own angle.

The adjustment rod 51 rotates around the connection point between the adjustment rod 51 and the differential crank 52 under the adjustment of the operator, the rotation of the adjustment rod 51 will drive the rotation of the differential crank 52 fixedly connected with it, and the rotation of the differential crank 52 will drag the differential crank 52 to rotate. Moving connecting piece 53 moves. Since the differential connecting piece 53 is rotationally connected with the cover plate 434 in the second transmission assembly 43, the differential connecting piece 53 is driven by the differential crank 52 to perform its own rotation around the cover plate 434 and along with the cover plate 434 along the chute 417. Overall sliding. Driven by the differential connecting piece 53, the position of the lateral driving slider 435 fixedly connected to the connection block 433 and the cover plate 434 in the chute 417 changes, thereby changing the initial position of the lateral driving slider 435, As the decomposition of the actual movement of the lateral drive slider 435 in the lateral direction, the motion state of the differential feed dog 412 also changes, thereby realizing the difference between the active feed dog 411 and the differential feed dog 412. Momentum regulation.

In order to further improve the convenience of adjusting the differential amount, the differential amount adjusting mechanism 50 provided by the utility model also includes an adjusting panel 54 arranged on the outside of the housing 10. The adjusting panel 54 is provided with a chute (not labeled), and the adjusting rod 51 is fixedly connected with a slide block (not numbered) arranged in the chute, and an adjustment member 541 is fixed on the slide block. The operator can adjust the swing position of the adjustment rod 51 by operating the adjustment member 541, thereby facilitating the operation of the operator.

Further, the adjustment panel 54 may also be provided with status signs such as a dial, so as to facilitate the visualization and quantitative adjustment of the differential amount.

The differential amount adjustment mechanism 50 provided by the utility model is also provided with a fixed shaft 521 on the differential crank 52. The fixed shaft 521 is fixed inside the housing 10 and is fixedly connected to the adjustment rod 51 through a shaft screw 522. . By setting the fixed shaft 521, the differential crank 52 can be stably arranged on the housing 10, and the axial screw 522 can also realize a reliable connection between the differential crank 52 and the adjusting rod 51, which further improves the operation of the overlock sewing machine 100. reliability and stability.

Please refer to Fig. 12 to Fig. 13 together. Fig. 12 is a structural schematic diagram of the feed dog frame adjustment mechanism 60 in the overlock sewing machine 100 shown in Fig. Schematic diagram of the perspective structure. Existing overlock sewing machines can only process fabrics of a specific thickness during the sewing process, and the sewing effect on fabrics of other thickness ranges is very poor. In order to improve the adaptability to fabrics of different thicknesses and improve the flexible manufacturing capability of the whole machine system, the overlock sewing machine 100 is also provided with a feed dog frame adjustment mechanism 60, which is connected to the cloth feed dog frame 41, By adjusting the inclination and height of the feed dog frame 41, the feed dog 413 is used to change the feeding state of the cloth with different thickness, so that the cloth is in a proper tension state, thereby improving the sewing effect of the cloth with different thickness.

The feed dog adjustment mechanism 60 is arranged on the side of the housing 10 and connected to the cloth feed dog 41. The cloth feed dog adjustment mechanism 60 includes an adjustment assembly 61 and an operation assembly 62. One end of the adjustment assembly 61 is connected to the operation assembly 62. The other end is connected to the feed dog frame 41 , and the adjustment assembly 61 is used to adjust the inclination angle of the cloth feed dog frame 41 ; the operation assembly 62 is arranged on the housing 10 and is used to control the adjustment assembly 61 . Under the control of the operation assembly 62, the adjustment assembly 61 adjusts the inclination angle of the feed dog frame 41 accordingly according to the thickness of the cloth, thereby changing the inclination angle of the feed dog 413 on the cloth feed dog frame 41, and the overall inclination of the cloth feed dog 413 will be Changing its own height, the cloth feeding dog 413 adapts to cloths of different thicknesses through changes in height and inclination.

In this embodiment, the operating assembly 62 is arranged on the casing 10 and protrudes from the cover 14 through the gap 143, so that the operating assembly 62 can be exposed on the casing 10, which is convenient for the operator to operate, and the operator does not need to flip Opening the cover body can realize the adjustment of the inclination and height of the cloth feeding dog frame 41, which is convenient and quick to adjust and improves the processing efficiency.

Please also refer to FIG. 14 . FIG. 14 is an exploded schematic view of the cloth feeding dog frame adjustment mechanism 60 shown in FIG. 12 . The adjustment assembly 61 includes an eccentric shaft 611 and an adjustment slider 612. The eccentric shaft 611 passes through the adjustment slider 612. The adjustment slider 612 is sleeved on the eccentric shaft 611 and embedded in two parallel extensions on the feed dog 41. At the arm 416 , the eccentric shaft 611 is connected to the operating assembly 62 . The eccentric shaft 611 rotates under the drive of the operating assembly 62, and the rotation of the eccentric shaft 611 will drive the movement of the adjustment slider 612. The movement of the adjustment slider 612 can drive the cloth feed dog 41 to adjust its height and inclination.

The eccentric shaft 611 includes 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 connected to the operating assembly 62. The eccentric shaft 611 can rotate around the central axis of the concentric section 6111 The center of the eccentric section 6112 and the center of the concentric section 6111 are not concentric, and the two are offset by a preset distance, and the eccentric section 6112 can revolve under the drive of the concentric section 6111.

The adjustment slider 612 is block-shaped, and its interior is hollow and the eccentric section 6112 of the eccentric shaft 611 is sheathed. The adjustment slider 612 is embedded between the two parallel extension arms 416. 6112 is rotationally connected, and the orbiting of the eccentric section 6112 in the eccentric shaft 611 will drive the adjustment slider 612 to orbit in parallel.

Because the adjustment slider 612 is embedded between the two parallel extension arms 416, the adjustment slider 612 can slide on the track formed by the extension arms 416, and the adjustment slider 612 is in the sliding groove 418 formed between the extension walls 416 Sliding can release the movement in the second direction brought by the eccentric shaft 611 , so that the parallel rotation of the adjusting slider 612 will only drive the extension arm 416 to rise or fall in the first direction. The extension arm 416 is arranged on one end of the cloth feed dog frame 41, and the other end of the cloth feed dog frame 41 is fixed by the main shaft 20, so the extension arm 416 will drive the cloth feed dog frame 41 to tilt when the extension arm 416 rises or falls in the first direction. The tilting angle of the tooth frame 41 is determined by the moving distance of the extension arm 416 in the first direction.

In one embodiment of the present utility model, the adjustment assembly 61 further includes a first bushing 614, the first bushing 614 is sleeved on the concentric section 6111 of the eccentric shaft 611 and fixed on the housing 10, the first bushing 614 It is used to carry the eccentric shaft 611 and provides a stable rotation environment for the eccentric shaft 611 . The first shaft sleeve 614 has the advantages of anti-corrosion, low cost, etc., and is more suitable for working conditions of low-speed rotation.

Further, the first shaft sleeve 614 is a copper sleeve. It can be understood that, in other embodiments, the sleeve can also be made of other materials than copper; the first sleeve 614 can also use a rolling bearing if the cost and low-speed rotation requirements are not considered.

Further, a snap ring 6113 is also provided on the concentric section 6111 of the eccentric shaft 611, and the snap ring 6113 is used to bear against one end of the first sleeve 614, so as to realize the relative position between the first sleeve 614 and the eccentric shaft 611. limited.

In one embodiment of the present utility model, two retaining rings 615 are respectively arranged on both sides of the adjusting slider 612, and the two retaining rings 615 are arranged on both sides of the adjusting slider 612 oppositely, and are sleeved with the adjusting slider 612 in sequence. Installed on the eccentric section 6112 of the eccentric shaft 611 , the retaining ring 615 is used to fix the position of the adjusting slider 612 on the eccentric shaft 611 to prevent the adjusting slider 612 from shifting out of the sliding groove 418 due to vibration.

Further, the retaining ring 615 is fixed on the eccentric section 6112 of the eccentric shaft 611 by means of screw compression. Of course, the retaining ring 615 can also be fixed on the eccentric shaft 611 by other means such as glue, riveting, etc., as long as the retaining ring 615 can be firmly fixed on the eccentric shaft 611; the adjustment slider 612 can also be realized by other components. Self-limiting, the retaining ring 615 can be omitted at this time.

The operation assembly 62 includes a control element 621, and a transmission structure 622 is also provided between the control element 621 and the adjustment assembly 61. The control element 621 is used for the operator to control and rotate, and the transmission structure 622 is used to transmit the rotation of the control element 621 to the adjustment assembly. 61, and according to the rotation amount of the control element 621, the amount of change of the inclination angle of the feed dog frame 41 by the adjustment assembly 61 is controlled.

The control element 621 is arranged on the housing 10 and protrudes from the cover body 14 through the gap 143, which enables the operator to manipulate the control element 621 more smoothly, improves the convenience of the feed dog adjustment mechanism 60, and improves the package The overall production efficiency of the sewing machine 100.

In this embodiment, the control element 621 is a control rod, which can rotate relative to the transmission structure 622 , and the operator adjusts the inclination angle of the feeding dog frame 41 through the rotation amount of the control rod relative to the transmission structure 622 . It can be understood that, in other embodiments, the control element 621 can also use other types of elements such as a rotating knob, as long as the control element 621 can realize the adjustment of the amount of rotation.

In this embodiment, the transmission structure 622 includes a groove 6221 set on the end of the concentric section 6111 of the eccentric shaft 611 away from the feed dog frame 41. The control element 621 is embedded in the groove 6221, and the rotation of the control element 621 can be achieved by itself. Fitting with the groove 6221 drives the eccentric shaft 611 to rotate, thereby realizing the adjustment of the inclination angle of the feeding dog frame 41 .

Furthermore, the groove 6221 is opened along the radial direction of the concentric section 6111 of the eccentric shaft 611 . It can be understood that, in other implementation manners, the groove 6221 can also adopt other opening methods besides the above ones.

In one embodiment of the present utility model, in order to further improve the operation convenience of the operator, the operating assembly 62 further includes a locking disc 623, which is fixed on the side of the housing 10 perpendicular to the length direction of the feed dog frame 41. On the side, the locking disc 623 is provided with a sliding groove 6231 for the sliding of the control element 621. The sliding of the control element 621 on the sliding groove 6231 can improve the convenience of the operator to operate the control element 621 and the stability of the sliding of the control element 621 itself. and improve regulation efficiency.

Further, the locking disc 623 is also provided with a status mark (not shown in the figure), which is used to guide the operation of the operator and inform the operator of the current adjustment status. The state mark can use direction arrows to guide the operator's manual operation, and can also use words, such as "high and low" and "size" to mark the current adjustment state. Of course, the state mark can also be represented by other marking methods other than arrows and words, such as a dial, to represent the current adjustment state.

Further, the lock plate 623 is also provided with a lock nut 6232 fixedly connected to the end of the control element 621 away from the connecting pin 6221, the lock nut 6232 is fixedly connected to the control element 621 and restricts the control element 621 from extending in the vertical direction of the slide groove 6231 on the move. The lock nut 6232 can slide in the chute 6231 under the direct operation of the operator, and the lock nut 6232 is used for manual direct contact by the operator, so as to prevent the operator from directly turning the slender rod-shaped control element 621 to achieve The operation of the control element 621 further improves the convenience of operation.

The principle that the overlock sewing machine 100 adjusts the angle and height of the feed dog 41 through the feed dog adjustment mechanism 60 to adapt to different thicknesses of cloth will be explained below.

When one end of the feed dog 41 changes in height under the adjustment of the feed dog adjustment mechanism 60, the overall inclination of the feed dog 41 changes, and the change in the overall inclination of the feed dog 41 will change the height of the feed dog 413. The inclination angle of the active tooth 4131 and the differential tooth 4132 is changed from being horizontally aligned to being evenly aligned at an oblique angle. Since the active tooth 4131 and the differential tooth 4132 are fed in different elliptical trajectories, the angle between the two is inclined. Changing the height of the machine head will change the sewing effect.

Please refer to Figure 15a to Figure 15c together, Figure 15a is a schematic diagram of the principle when the cloth feed dog 41 is in a normal working state, Figure 15b is a schematic diagram of the principle when the cloth feed dog 41 is in a thick material working state, and Figure 15c is a schematic diagram of the cloth feeding Schematic diagram of the principle when the tooth frame 41 is in the thin material working state. In the figure, the sign S represents the elliptical trajectory of the active tooth 4131 and the differential tooth 4132, V represents the direction of the cutting angle when the active tooth 4131 and the differential tooth 4132 cut out the working plane, and F represents the pairing of the active tooth 4131 and the differential tooth 4132 The stretch direction of the cloth.

(1) When the cloth feeding dog frame 41 is in the normal working state: the cloth feeding dog frame 41 is not tilted, the driving tooth 4131 is level with the differential tooth 4132, and the driving tooth 4131 and the differential tooth 4132 contact the cloth synchronously. The direction of the elastic force F of 4131 and differential teeth 4132 acting on the fabric is the same as the cutting angle direction when the active teeth 4131 and differential teeth 4132 cut out the working plane, both are vertical directions, and this state is suitable for sewing with normal thickness and moderate hardness fabric.

(2) When the cloth feeding dog frame 41 is in the working state of thick material: the cloth feeding dog frame 41 is tilted so that the height of the active tooth 4131 is lower than the height of the differential tooth 4132. At this time, the active tooth 4131 and the differential tooth 4132 act on the cloth The direction of the elastic force F remains vertical, but the cutting angle direction when the active tooth 4131 and the differential tooth 4132 cut out the working plane no longer maintains the vertical direction, but feeds the cloth in an oblique cutting manner;

Because the height of the active tooth 4131 is lower than that of the differential tooth 4132, the differential tooth 4132 rises above the needle plate before the active tooth 4131 and touches the cloth in advance, the feeding efficiency of the differential tooth 4132 is higher than that of the active tooth 4131 Therefore, when the active tooth 4131 and the differential tooth 4132 are conveying the cloth, the differential tooth 4132 has a certain catch-up effect relative to the active tooth 4131, forming a pushing effect on the cloth, so that the thick materials such as multi-layer and stem seams can be fed smoothly , the needle pitch is uniform, and the sewing quality is better.

(3) When the cloth feeding dog frame 41 is in the working state of thin material: the cloth feeding dog frame 41 is inclined so that the height of the active tooth 4131 is higher than the height of the differential tooth 4132. At this time, the active tooth 4131 and the differential tooth 4132 act on the cloth The direction of the elastic force F still remains vertical, but the cutting angle direction when the active tooth 4131 and the differential tooth 4132 cut out the working plane no longer maintains the vertical direction, and the active tooth 4131 and the differential tooth 4132 are cut obliquely. send cloth;

Since the height of the active tooth 4131 is higher than that of the differential tooth 4132, the active tooth 4131 rises above the needle plate 13 before the differential tooth 4132 and contacts the cloth in advance, and the feeding efficiency of the active tooth 4131 is higher than that of the differential tooth 4132. Therefore, when the active tooth 4131 and the differential tooth 4132 are conveying the cloth, the active tooth 4131 has a certain distance away from the differential tooth 4132, forming a drag effect on the cloth, so that thin materials such as mesh are flat and not wrinkled, and the sewing Better quality.

Of course, the structure of the operating assembly 62 can also be adjusted. For example, the operating assembly 62 can also adopt other adjustment methods such as electric adjustment and knob adjustment. It only needs to realize the control of the adjustment assembly 61 and make it easier for the operator to operate.

The overlock sewing machine 100 provided by the utility model is provided with a cloth feeding dog frame adjustment mechanism 60, which exposes the operating assembly 62 on the housing 10, which can facilitate the operation of the operator, and the operator can realize the adjustment of the cloth feeding without opening the cover. The adjustment of the inclination angle and the height of the tooth frame 41 is convenient and fast, and the processing efficiency is improved.

The cloth feeding dog frame adjustment mechanism 60 provided by the utility model can adjust the inclination and height of the cloth feeding dog frame 41, and the operating component 62 in the cloth feeding dog frame adjusting mechanism 60 is exposed on the housing 10, which is more convenient for the operator to operate. The operator can adjust the inclination and height of the cloth feeding dog frame 41 without opening the cover, and the adjustment is convenient and fast. The overlock sewing machine 100 using the above-mentioned feed dog adjustment mechanism 60 can improve the sewing quality and the flexible manufacturing capability of the whole machine system, and has wide application prospects.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above implementation methods Appropriate changes and changes all fall within the scope of protection of the utility model.

Claims (10)

1. a kind of feed dog frame regulating mechanism, is installed on the shell of overedger, the side of the shell is rotationally provided with lid Body, which is characterized in that the feed dog frame regulating mechanism includes adjusting component and operating assembly, and described one end for adjusting component connects It is connected to feed dog frame, the other end is connected to the operating assembly, and the operating assembly controls the adjusting component movement to adjust The inclination angle of the feed dog frame and height, open up on the lid jagged, and the operating assembly is set on the shell simultaneously It is exposed by the notch.

2. feed dog frame regulating mechanism as described in claim 1, which is characterized in that the operating assembly includes control element, Drive mechanism is additionally provided between the control element and the adjusting component, the control element passes through the drive mechanism band The adjusting component movement is moved, the control element is installed on the shell and the corresponding notch setting.

3. feed dog frame regulating mechanism as claimed in claim 2, which is characterized in that the control element is control-rod, described Control-rod drives inclination angle and the height for adjusting component and adjusting the feed dog frame around the rotation for adjusting component.

4. feed dog frame regulating mechanism as claimed in claim 3, which is characterized in that the operating assembly includes locking plate, institute It states and offers sliding slot on locking plate, the relatively described one end for adjusting component of the control-rod is connected to the locking plate and can be Sliding in the sliding slot.

5. feed dog frame regulating mechanism as claimed in claim 4, which is characterized in that be additionally provided with state mark on the locking plate Know, the status indicator is used to identify inclination angle and the height condition of the feed dog frame, and guides the operation of operator.

6. feed dog frame regulating mechanism as claimed in claim 4, which is characterized in that be additionally provided with locking screw on the locking plate Mother, the locking nut are fixedly connected on the control-rod and limit shifting of the control-rod on vertical sliding slot extending direction It is dynamic.

7. feed dog frame regulating mechanism as claimed in claim 3, which is characterized in that the adjusting component include adjusting slider and Eccentric shaft, the adjusting slider be embedded in the feed dog frame and can the relatively described feed dog frame slide, the eccentric shaft With concentric segments and be connected to the eccentric segments of the concentric segments, the eccentric segment of the eccentric shaft wear the adjusting slider and with institute It states adjusting slider to be rotatably assorted, the control-rod controls the eccentric shaft turns and the adjusting slider is driven to adjust the work feed The inclination angle of retainer and height.

8. feed dog frame regulating mechanism as claimed in claim 7, which is characterized in that the two sides of the adjusting slider are each provided with One retaining ring, the retaining ring is for limiting position of the adjusting slider on the eccentric shaft.

9. feed dog frame regulating mechanism as claimed in claim 7, which is characterized in that the drive mechanism is described including being opened in Groove on eccentric shaft, the control-rod are embedded in the groove.

10. a kind of overedger, including feed dog frame and it is connected to the feed dog frame regulating mechanism of the feed dog frame, feature exists In the feed dog frame regulating mechanism is feed dog frame regulating mechanism as described in any one of claims 1-9.