CN209353054U - Cloth feeding dog frame adjustment mechanism and overlock sewing machine using the mechanism - Google Patents

Abstract

The utility model provides a cloth feeding tooth frame adjustment mechanism, which is used for adjusting the cloth feeding tooth frame in an overlock sewing machine. The cloth feeding tooth frame adjustment mechanism includes an adjustment component and an operation component. The slider is embedded in the feed dog rack and can slide relative to the feed dog rack. The eccentric shaft has a concentric section and an eccentric section connected to the concentric section. The eccentric section of the eccentric shaft passes through the adjusting slider and cooperates with the adjusting slider. , the operating assembly includes a control element, the control element is rotatably connected to the concentric section of the eccentric shaft, and the control element adjusts the inclination and height of the feed dog frame by changing its own rotation amount. 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; the overlock sewing machine using the cloth feeding dog frame adjusting mechanism improves the sewing quality 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 device.

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 device. The cloth feed dog adjustment mechanism can adapt to different thicknesses of cloth by adjusting the inclination and height of the cloth feed dog, including The processing quality of the sewing machine is improved, and the flexible manufacturing capability of the whole machine system is improved.

The utility model provides a cloth feeding dog frame adjustment mechanism, which is used for adjusting the cloth feeding dog frame in an overlock sewing machine. The cloth feeding dog frame adjusting mechanism includes an adjustment assembly and an operation assembly, and the adjustment assembly includes an adjustment slider and an An eccentric shaft, the adjusting 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 an eccentric section connected to the concentric section, the eccentric The eccentric section of the shaft passes through the adjustment slider and rotatably cooperates with the adjustment slider. The operation assembly includes a control element, which is connected to the concentric section of the eccentric shaft. The control element changes its own The amount of rotation adjusts the inclination and height of the feed dog.

Further, the control element is an electric control element, and the electric control element changes its own rotation amount and adjusts the inclination angle and height of the feeding dog frame through electric control.

Further, the operation assembly further includes a fixed seat, which carries the electric control element and is installed at the casing of the overlock sewing machine.

Further, the control element is a control rod, and the control rod changes its own rotation amount and adjusts the inclination angle and height of the feed dog frame through manual control.

Further, the operating assembly includes a locking disc, and a sliding slot is opened on the locking disc, and the control rod 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 operation assembly further includes 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 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 worm gear and the worm The meshing rotation drives the eccentric shaft to rotate.

Further, the transmission assembly includes a connection pin, a transmission crank, a guide and a slider, one end of the transmission crank is connected to the connection pin, and the other end is connected to the slider, and the connection pin is opposite to the transmission. One end of the crank is connected to the control element, the guide piece passes through the slider, and the slider is rotatably connected to the adjustment assembly, and the slider moves along the guide piece under the drive of the transmission crank. slide and drive the adjustment assembly to rotate.

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 adjusting mechanism of the cloth feeding dog provided by the utility model can adjust the inclination and height of the cloth feeding dog, so that the cloth feeding dog can change the distance between the cloth feeding dog and the cloth according to the thickness of different cloths. Feed status. 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 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 a schematic structural view of the overlock sewing machine shown in Fig. 1 after the shell is omitted;

Fig. 3 is an exploded schematic diagram of the overlock sewing machine shown in Fig. 2;

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 cloth feeding dog frame adjustment mechanism shown in Fig. 2 at another viewing angle;

Fig. 14 is an exploded schematic view of the adjusting mechanism of the cloth feeding dog shown in Fig. 13;

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;

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

Fig. 16 is a structural schematic diagram of the adjusting mechanism of the cloth feeding dog frame in the second embodiment of the present invention;

Fig. 17 is an exploded schematic view of the adjusting mechanism of the cloth feed dog shown in Fig. 16 .

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 structural schematic view of the overlock sewing machine 100 provided by the present invention after omitting part of the structure, Fig. 2 is a structural schematic view of the overlock sewing machine 100 shown in Fig. 1 omitting the housing 10, Fig. 3 It is an exploded schematic view of the overlock sewing machine 100 shown in FIG. 2 . 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 can also be provided with an operation port and a cover (not shown), the cover is rotatably connected to the side of the housing 10 close to the operation port, the rotation of the cover can close or open the operation port, including Part of the adjustment mechanism of the sewing machine 100 is disposed inside the casing 10 and near the operation port. When the cover body opens the operation port, part of the adjustment mechanism can be exposed from the operation port, and when the cover body closes the operation port, the part of the adjustment mechanism is also enclosed in the housing 10 . in this way. When the overlock sewing machine 100 needs to adjust parameters, the operator can turn over and open the cover, so that the internal parameter adjustment components are exposed, and the operator can adjust through the exposed adjustment components. The cover body 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.

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 looper (not shown in the figure) is actuated, so that the needle moves 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 lock of the textile. side work.

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 action 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, and the machine head is actively feeding the cloth. The tooth frame 411 and the differential feeding tooth frame 412 carry out sewing processing on the current cloth segment after feeding, and the cloth feeding tooth frame 41 continues to drag the next piece of cloth after the machine head finishes processing the current cloth, so as to circulate and realize Keep working.

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 operate within 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 is sleeved on the straight axis 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; On the eccentric wheel 22, the driving effect of the eccentric wheel 22 on the feeding connecting rod 423 is manifested as 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 reciprocate swing.

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 rotatably connected with the feeding connecting rod 423, 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 is also provided with 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 movement.

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 shaft 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. 14 together. FIG. 12 is a structural schematic diagram of the feed dog frame adjustment mechanism 60 in the first embodiment of the overlock sewing machine 100 shown in FIG. The structure schematic diagram of the mechanism 60 from another perspective, FIG. 14 is an exploded schematic diagram of the feed dog adjustment mechanism 60 shown in FIG. 13 . Existing overlock sewing machines can only process fabrics of a specific thickness in the process of realizing sewing operations, and the sewing effect on fabrics in 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 angle and height of the cloth feed dog frame 41, the cloth feed dog 413 is used to change the feeding state of the cloth of different thickness, so that the cloth is in a proper tension state, thereby improving the sewing effect of cloth of 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 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 the change of its own height and inclination angle.

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

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 the eccentric shaft 611 can rotate around the central axis of the concentric section 6111; the center of the eccentric section 6112 The center of the concentric section 6111 is not concentric, and the two are offset by a preset distance, and the eccentric section 6112 can be driven by the concentric section 6111 to revolve.

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 of 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 arms 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.

The operating 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 arranged between the control element 621 and the adjustment assembly 61. The control element 621 is used for the operator to control and rotate. The transmission assembly 622 It is used to transmit the rotation of the control element 621 to the adjustment assembly 61 , and control the amount of change of the inclination angle of the feed dog frame 41 by the adjustment assembly 61 according to the rotation amount of the control element 621 .

The control element 621 is rotatably connected with the transmission assembly 622, and the rotation amount of the control element 621 is transmitted to the adjustment assembly through the transmission assembly 622. The operator can adjust the inclination angle and height change of the feeding tooth frame 41 in real time by manipulating the control element 621, and the operation is very convenient. convenient.

Further, the operating assembly 62 includes a control element 621 and a transmission assembly 622, the transmission assembly 622 is arranged between the control element 621 and the eccentric shaft 611, the control element 621 adjusts the deflection angle of the eccentric shaft 611 through the transmission assembly 622 through electric control, The angle and height of the feed dog 413 are thereby adjusted.

In the first embodiment of the present utility model, the control element 621 is an electric control element 6211, and the operation assembly 62 adjusts the rotation angle of the eccentric shaft 611 through electric control, thereby adjusting the feeding dog 41 to a preset angle.

Further, the transmission assembly 622 includes a worm 6221 sleeved on the output shaft of the electric control element 6211 and a worm wheel 6222 sleeved on the concentric section 6111 of the eccentric shaft 611. The worm 6221 is fixedly connected to the output shaft of the electric control element 6211, and the worm gear 6222 It is fixedly connected with the concentric section 6111 of the eccentric shaft 611, and the rotation of the output shaft of the electric control element 6211 is driven by the mutual meshing of the worm 6221 and the worm wheel 6222 to drive the worm wheel 6222 to rotate to a preset angle. Connected, the rotation of the worm wheel 6222 will drive the rotation of the eccentric shaft 611, thereby realizing the adjustment of the angle and height of the feed dog 413.

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 on the concentric section 6111 of the eccentric shaft 611 by screw compression.

The output shaft of the electronic control element 6211 is provided with a groove (not labeled) that is sunken in the radial direction. After the screw passes through the worm wheel 6222, it is held against the bottom wall of the groove. By opening the groove, the output shaft of the electric control element 6211 The rotation can drive the worm wheel 6222 to rotate.

In this embodiment, since the central axis of the output shaft of the electric control element 6211 and the central axis of the eccentric shaft 611 are perpendicular to each other, the central axis of the worm 6221 and the central axis of the worm wheel 6222 are also perpendicular to each other. It can be understood that, in other embodiments, when the central axis of the output shaft of the electric control element 6211 and the central axis of the eccentric shaft 611 deflect to other angles, the central axis of the worm 6221 and the central axis of the worm wheel 6222 can also form other angles, For example, a coaxial arrangement is also possible.

Certainly, the worm gear 6222 is also fixed on the concentric section 6111 by other fixing methods other than screw compression, and the worm 6221 can also be fixed on the electric control element 6211 by other fixing methods other than screw compression; As long as the fixing method can realize reliable connection between the worm 6221 and the worm wheel 6222 .

The overlock sewing machine 100 provided by the present utility model does not limit the transmission assembly 622 to adopt a worm gear transmission; in other embodiments, the transmission assembly 622 can also adopt belt transmission, rack and pinion, coupling and other types transmission mode; when the electric control element 6211 can directly drive the eccentric shaft 611 to rotate without the transmission assembly 622, the transmission assembly 622 can also be omitted.

The rotation of the electronic control element 6211 will drive the worm wheel 6222 to rotate, and the rotation of the worm wheel 6222 will drive the eccentric shaft 611 to rotate eccentrically, and the eccentric rotation of the eccentric shaft 611 will drive the adjustment slider 612 connected to the eccentric shaft 611 to rotate on the first side. The upward position changes, thereby realizing the angle and height adjustment of the feed dog frame 41 .

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

In one embodiment of the present utility model, 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 to fix the electric control element 6211 on the The side of the housing 10 can facilitate the disassembly and adjustment of the electronic control element 6211 .

Of course, in other embodiments, the electric control element 6211 and the fixing seat 623, and between the fixing seat 623 and the housing 10 can also be fixed to each other by means of gluing, riveting, etc.; the electric control element 6211 can also be fixed on the On the housing 10, the fixing seat 623 can be omitted at this time.

In one embodiment of the present utility model, the adjustment assembly 61 further includes a shaft sleeve 613, the shaft sleeve 613 sleeves the concentric section 6111 of the eccentric shaft 611 and is fixed on the housing 10, the shaft sleeve 613 is used to carry the eccentric shaft 611, providing A stable rotating environment for the eccentric shaft 611 is ensured. The shaft sleeve 613 has the advantages of anti-corrosion and low cost, and is more suitable for working conditions of low-speed rotation.

Further, the shaft sleeve 613 is a copper sleeve. It can be understood that, in other embodiments, the bushing can also be made of other materials than copper; the bushing 613 can also be made of a rolling bearing if cost and low-speed rotation requirements are not considered.

In one embodiment of the present utility model, a first retaining ring 614 is provided on both sides of the casing, and two first retaining rings 614 are oppositely arranged at both ends of the shaft sleeve 613, and the first retaining ring 614 is used for fixing The position of the shaft sleeve 613 on the eccentric shaft 611 prevents the sleeve from shifting due to vibration.

Further, the first retaining ring 614 is fixed on the concentric section 6111 of the eccentric shaft 611 by means of screw compression. Of course, the first retaining ring 614 can also be fixed on the eccentric shaft 611 by other methods such as glue fixing and riveting, as long as the first retaining ring 614 can be firmly fixed on the concentric section 6111 of the eccentric shaft 611; Other elements are used to realize the self-limiting, and at this time, the first retaining ring 614 can be omitted.

In one embodiment of the present utility model, a second retaining ring 615 is respectively arranged on both sides of the adjusting slider 612, and the two second retaining rings 615 are oppositely arranged on both sides of the adjusting slider 612, and are connected with the adjusting slider 612 is sleeved on the eccentric section 6112 of the eccentric shaft 611 in sequence, and the second 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 second retaining ring 615 is fixed on the eccentric section 6112 of the eccentric shaft 611 by means of screw compression. Of course, the second retaining ring 615 can also be fixed on the eccentric shaft 611 by other methods such as glue fixing and riveting, as long as the second retaining ring 615 can be firmly fixed on the eccentric section 2 of the eccentric shaft 611; adjust the slider 612 It is also possible to use other components to realize its own position limitation, and at this time, the second retaining ring 615 can be omitted.

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.

Please refer to Fig. 16 and Fig. 17 together. Fig. 16 is a structural schematic diagram of the cloth feeding dog frame adjusting mechanism 60a in the second embodiment of the present invention, and Fig. 17 is an exploded schematic diagram of the cloth feeding dog frame adjusting mechanism 60a shown in Fig. 16 . The connection relationship and functions of the adjustment component 61a and the operation component 62a in the second embodiment of the present utility model are the same as those in the first embodiment, and will not be repeated here.

In the second embodiment of the present utility model, the adjustment mechanism 61 includes the above-mentioned eccentric shaft 611 and the adjustment slider 612, the adjustment mechanism 61 also includes the adjustment crank 613a, the eccentric shaft 611, the adjustment slider 612 and the adjustment crank 613a are all Along the lateral extension perpendicular to the length direction of the feed dog 41, the eccentric shaft 611 passes through the adjustment slider 612 and the adjustment crank 613a, and the adjustment slider 612 is sleeved on the eccentric shaft 611 and embedded in the feed dog 41 At the two parallel extension arms 416, the adjusting crank 613a is fixedly sleeved on the eccentric shaft 611 and connected to the operating assembly 62a. The adjustment crank 613a drives the eccentric shaft 611 to rotate under the drive of the operation component 62a, and the rotation of the eccentric shaft 611 will drive the adjustment slider 612 to move, and the cloth feed dog adjustment mechanism 60 drives the cloth feed dog by the movement of the adjustment slider 612 41 adjust the height and inclination of oneself.

One end of the adjusting crank 613a is sleeved on the concentric section 6111 of the eccentric shaft 611, and the other end extends outward along the radial direction of the eccentric shaft 611 and is rotationally connected with the operating assembly 62a. The adjusting crank 613a protrudes radially outward along the eccentric shaft 611 A through hole (not labeled) is opened in the part of the handle, and the adjusting crank 613a is connected to the operating assembly 62a through the through hole. The adjusting crank 613a can rotate under the drive of the operating assembly 62a, thereby driving the eccentric shaft 611 to rotate.

In this embodiment, the adjusting crank 613a is pressed against the concentric section 6111 of the eccentric shaft 611 by a threaded fastener (not labeled). It can be understood that, in other embodiments, the adjusting crank 613a can also be fixed on the concentric section 6111 of the eccentric shaft 611 by means of riveting, gluing or the like.

In this embodiment, the adjusting crank 613a is fixed on the eccentric shaft 611 by means of screw compression. It can be understood that the adjusting crank 613a can also be fixed on the eccentric shaft 611 by other means such as glueing or riveting, as long as the adjusting crank 613a can be firmly fixed on the eccentric shaft 611 .

In this embodiment, the adjusting crank 613a is also provided with a through hole (not labeled) for matching the operating assembly 62a, and the through hole is used for embedding part of the operating assembly 62a, so as to realize the partial structure of the operating assembly 62a and the adjusting crank. The mutual fixation between 613a.

The adjustment 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 will drive the adjustment slider 612 rotationally connected with the eccentric section 6112 of the eccentric shaft 611 to move, and the adjustment slider 612 The actuation is decomposed into sliding in the sliding groove 418 along the length direction of the feed dog 41 and the rise or fall in the vertical direction. The rise or fall of the adjustment slider 612 will drive one end of the feed dog 41 to rise. High or lower, thereby changing the inclination and height of the feed dog frame 41.

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

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

In the second embodiment of the present utility model, the operating assembly 62a is arranged on the side of the casing 10 perpendicular to the length direction of the feed dog frame 41, so that it is convenient for the operator to operate, and the operator does not need to open the cover Just can realize the adjustment to the inclination angle and the height of the feed dog frame 41, the adjustment is convenient and fast, and the processing efficiency is improved.

Of course, in other embodiments, the operating assembly 62a can also be arranged at other positions of the housing 10, as long as the operating assembly 62a can drive the adjusting assembly 61a to adjust the inclination and height of the feeding dog frame 41 under the operation of the operator. Can.

In the second embodiment of the present utility model, the control element 621 is a control rod 6212, and the control rod 6212 can rotate relative to the transmission assembly 622. The operator adjusts the feed dog 41 through the rotation amount of the control rod 621 relative to the transmission assembly 622. The size of the inclination.

In the second embodiment of the present utility model, the transmission assembly 622 transmits the rotation amount of the control rod 6212 through pin transmission,

The transmission assembly 622 includes a connection pin 6221a, a transmission crank 6222a, a guide 6223a and a slider 6224a. One end of the transmission crank 6222a is rotatably connected to the connection pin 6221a, and the other end is rotatably connected to the slider 6224a. The slider 6224a is embedded in the guide 6223a and slide relative to the guide 6223a under the guidance of the guide 6223a, the transmission assembly 622a drives the transmission crank 6222a to rotate through the connecting pin 6221a, utilizes the rotational connection between the transmission crank 6222a and the slider 6224a to drive the adjustment crank 613a to rotate, and passes through the slider The sliding of 6224a on the guide piece 6223a releases part of the movement component of the adjustment crank 613a, so as to realize the power transmission to the rotation amount of the control rod 6212.

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

Further, a status mark 6232a is also provided on the locking disc 623a, and the status mark 6232a is used to guide the operation of the operator and inform the operator of the current adjustment status. The status mark 6232a can use direction arrows to guide the operator's manual operation, and can also use words, such as "high and low" and "size" to identify the current adjustment status. Of course, the status mark 6232a can also be marked in other ways than arrows and words, such as a dial, to represent the current adjustment status.

Further, the locking disc 623a is also provided with a locking nut 6233a fixedly connected to the end of the control element 621 away from the connecting pin 6221. The locking nut 6233a is fixedly connected to the control element 621 and restricts the control element 621 from extending in the vertical direction of the sliding groove 6231a. on the move. The lock nut 6233a can slide in the chute 6231a under the direct operation of the operator, and the lock nut 6233a 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.

In the second embodiment of the present utility model, the transmission assembly 622 also includes a fixing piece 6227a embedded in the end of the connecting pin 6221a away from the control element 621a, the fixing piece 6227a can fix the transmission crank 6222a on the side of the housing 10, Axial positioning of the connecting pin 6221a and the transmission crank 6222a is realized.

The cloth feeding dog frame adjustment mechanism 60 provided by the second embodiment of the utility model adopts the control rod 6212 as the element directly operated by the operator. The control rod 6212 can realize the manual direct operation of the operator, and is relatively good in operability. At the same time, the cost is low, which can meet the market demand for low-priced products.

In other embodiments, the operating assembly is also arranged on the casing 10 and exposed through a gap on the cover, so that the operating assembly can be exposed on the casing 10, which is convenient for the operator to operate, and the operator does not need to open the cover. The cover body can realize the adjustment of the inclination angle and height of the cloth feeding dog frame 41, which is convenient and quick to adjust and improves the processing efficiency.

In other embodiments, the manually operated control element 621 can also adopt other types such as knobs, as long as the manually operated control element 621 can adjust the inclination and height of the feeding dog frame 41 according to its own rotation amount. Can.

It should be noted that the two embodiments provided by the utility model can be mutually engaged, such as the setting position of the operating components, the specific transmission mode of the transmission structure, etc., can be replaced with each other, as long as the replacement of the two embodiments does not affect the feeding dog The adjustment mechanism 60 can realize the inclination angle and height adjustment of the cloth feed dog frame 41.

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, so that the cloth feeding dog frame 41 can change the feeding state of the cloth feeding dog 413 according to the thickness of different cloths. 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 (11)

1. a kind of feed dog frame regulating mechanism, for adjusting the feed dog frame in overedger, which is characterized in that the feed dog frame Regulating mechanism includes adjusting component and operating assembly, 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 sliding, the eccentric shaft is with concentric segments and is connected to institute The eccentric segment of concentric segments is stated, the eccentric segment of the eccentric shaft wears the adjusting slider and is rotatably assorted with the adjusting slider, The operating assembly includes control element, and the control element is connected to the concentric segments of the eccentric shaft, and the control element is logical It crosses and changes inclination angle and height that itself amount of spin adjusts the feed dog frame.

2. feed dog frame regulating mechanism as described in claim 1, which is characterized in that the control element is electric control element, institute Electric control element is stated to change the amount of spin of itself by way of Electronic control and adjust inclination angle and the height of the feed dog frame.

3. feed dog frame regulating mechanism as claimed in claim 2, which is characterized in that the operating assembly further includes fixing seat, The fixing seat carries the electric control element and is installed at the shell of the overedger.

4. feed dog frame regulating mechanism as described in claim 1, which is characterized in that the control element is control-rod, described Control-rod changes the amount of spin of itself by way of manually controlling and adjusts inclination angle and the height of the feed dog frame.

5. feed dog frame regulating mechanism as claimed in claim 4, which is characterized in that the operating assembly includes locking plate, institute It states and offers sliding slot on locking plate, the control-rod is connected to the locking plate and can slide in the sliding slot.

6. feed dog frame regulating mechanism as claimed in claim 5, 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.

7. feed dog frame regulating mechanism as claimed in claim 6, 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.

8. feed dog frame regulating mechanism as described in claim 1, which is characterized in that the operating assembly further includes transmission group Part, the transmission component are set between the concentric segments of the eccentric shaft and the control element, and the control element passes through institute It states transmission component and drives the eccentric shaft turns.

9. feed dog frame regulating mechanism as claimed in claim 8, which is characterized in that the transmission component includes worm gear and snail Bar, the worm gear set are set to the concentric segments of the eccentric shaft, and the worm set is set on the output shaft of the control element, described Engagement rotation between worm gear and the worm screw drives the eccentric shaft turns.

10. feed dog frame regulating mechanism as claimed in claim 8, which is characterized in that the transmission component includes connecting pin, passes Dynamic crank, guide part and sliding block, one end of the driving crank are connected to the connecting pin, and the other end is connected to the sliding block, One end of the relatively described driving crank of the connecting pin is connected to the control element, and the guide part wears the sliding block, institute It states sliding block and is rotationally connected with the adjusting component, sliding block guide part described in the drive lower edge of the driving crank slides simultaneously The adjusting component is driven to rotate.

11. 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 the feed dog frame regulating mechanism as described in claim 1-10 any one.