CN109629123B - Cloth feeding tooth rack resetting method - Google Patents
Cloth feeding tooth rack resetting method Download PDFInfo
- Publication number
- CN109629123B CN109629123B CN201811575620.2A CN201811575620A CN109629123B CN 109629123 B CN109629123 B CN 109629123B CN 201811575620 A CN201811575620 A CN 201811575620A CN 109629123 B CN109629123 B CN 109629123B
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- China
- Prior art keywords
- cloth feeding
- eccentric shaft
- feed dog
- overedger
- feeding tooth
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
- D05B19/16—Control of workpiece movement, e.g. modulation of travel of feed dog
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a cloth feeding tooth rack resetting method, which is applied to an overlock machine, and is used for resetting a cloth feeding tooth rack in the overlock machine, the overlock machine comprises a cloth feeding tooth rack adjusting mechanism, a control part and a driver, the cloth feeding tooth rack adjusting mechanism comprises an adjusting assembly, the adjusting assembly comprises an adjusting slide block and an eccentric shaft, the adjusting slide block is embedded in the cloth feeding tooth rack, the eccentric shaft penetrates through the adjusting slide block and is connected with the driver, the control part is electrically connected with the driver, and the cloth feeding tooth rack resetting method comprises the following steps: the control piece sends a reset instruction when the overedger is started; the driver receives a reset instruction and controls the eccentric shaft to rotate; the driver drives the eccentric shaft to rotate and drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame. The cloth feeding tooth rack resetting method provided by the invention can realize the resetting of the cloth feeding tooth rack after the overedger is started, and has a wide application prospect.
Description
Technical Field
The invention relates to the technical field of sewing, in particular to a reset method of a cloth feeding tooth rack.
Background
The overlock sewing machine is mainly used for serging and sewing textiles and has wide application in the field of sewing. In order to adapt to the cloth with different thickness degrees, a cloth feeding tooth rack adjusting mechanism is arranged in the overedger to adjust the position parameters of the cloth feeding tooth rack, and the cloth feeding tooth rack is not in the initial position after being adjusted. Since the feed dog frame is not in the initial position when starting up, if the position parameters of the feed dog frame are continuously adjusted on the basis, the feed dog frame is in the wrong position, and the adjustment fails. The prior overlock sewing machine cannot overcome the problems and influences the wide application of the overlock sewing machine.
Disclosure of Invention
In view of the above, there is a need for a method for resetting a feed dog frame, which can reset the feed dog frame after starting up.
The invention provides a cloth feeding tooth rack resetting method, which is applied to a overedger and is used for resetting a cloth feeding tooth rack in the overedger, the overedger comprises a cloth feeding tooth rack adjusting mechanism, a control piece and a driver, the cloth feeding tooth rack adjusting mechanism comprises an adjusting assembly, the adjusting assembly comprises an adjusting slide block and an eccentric shaft, the adjusting slide block is embedded in the cloth feeding tooth rack, the eccentric shaft penetrates through the adjusting slide block and is connected with the driver, the control piece is electrically connected with the driver, and the cloth feeding tooth rack resetting method comprises the following steps:
the control piece sends a reset instruction when the overedger is started;
the driver receives the reset instruction and controls the eccentric shaft to rotate;
the driver drives the eccentric shaft to rotate and drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
Further, the overedger is provided with an induction assembly, the induction assembly is used for sensing the deflection angle of the eccentric shaft, and the step of sending a reset instruction by the control element when the overedger is started comprises the following steps:
the sensing assembly senses the deflection angle of the eccentric shaft.
And the control part sends a reset instruction according to the deflection angle of the eccentric shaft detected by the induction assembly when the overedger is started.
Further, the sensing component senses the deflection angle of the eccentric shaft and comprises:
the induction assembly senses the deflection angle of the eccentric shaft through a Hall effect.
Further, the overedger comprises an input device, the input device is electrically connected with the control element, and the step of sending a reset instruction by the control element when the overedger is started comprises the following steps:
an operator inputs a reset instruction to the control piece through an input device;
the control member issues a reset command to the driver.
Further, the input device is an operation panel, the overedger is started, and the step of inputting the reset instruction into the control piece by an operator through the input device comprises the following steps:
and an operator inputs a reset instruction to the control piece through the operation panel.
Further, suggestion keys are arranged on the operation panel, the overedger is started, and the step that an operator inputs a reset instruction into the control piece through the operation panel comprises the following steps:
and the operator inputs a reset instruction to the control piece through the suggestion key of the operation panel.
Further, the step of sending a reset instruction by the control element when the overedger is started comprises the following steps:
the control piece and the overedger are started together, and the control piece sends a reset instruction to the driver.
Further, the feed dog frame adjusting assembly comprises an operating assembly, the operating assembly comprises an electric control element and a transmission assembly, and the electric control element controls the eccentric shaft to rotate under the transmission action of the transmission assembly and drives the adjusting slide block to adjust the inclination angle and the height of the feed dog frame; the overedger is provided with a control center, and the control center is used for controlling the operation of the overedger.
Further, the driver is integrated with the electric control element, and/or
The control member is integrated with the control center.
Further, the transmission assembly is at least one of a chain transmission, a belt transmission, a gear transmission and a worm and gear transmission.
The cloth feeding tooth rack resetting method provided by the invention can realize the resetting of the cloth feeding tooth rack after the overedger is started, and the cloth feeding tooth rack can be adjusted in the follow-up process based on the initial position, so that the reliability of the overedger is improved, and the cloth feeding tooth rack resetting method has a wider application prospect.
Drawings
FIG. 1 is a schematic structural view of the overedger provided by the present invention with part of the structure omitted;
FIG. 2 is an exploded view of the overlock machine shown in FIG. 1;
FIG. 3 is a schematic structural view of the overedger shown in FIG. 2 without the shell;
FIG. 4 is a schematic structural view of the cloth feeding mechanism shown in FIG. 2;
FIG. 5 is a schematic view of the cloth feeding mechanism shown in FIG. 4 from another perspective;
FIG. 6 is a schematic structural view of a feed dog adjusting mechanism of the overedger shown in FIG. 2 engaged with a feed dog;
FIG. 7 is an exploded view of the feed dog adjustment mechanism shown in FIG. 6;
FIG. 8 is an exploded view of the feed dog adjustment mechanism of FIG. 7 from another perspective;
FIG. 9a is a schematic view of the feed dog carrier in a normal operating condition;
FIG. 9b is a schematic view of the work feed dog frame in a thick work state;
FIG. 9c is a schematic view of the feed dog frame in a thin material working state;
fig. 10 is a schematic flow chart of a cloth feeding method of a cloth feeding dental frame in one embodiment of the invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The invention provides a cloth feeding tooth rack resetting method which is applied to an overedger. Fig. 1 is a schematic structural view of an overedger 100 applying the cloth feeding dog resetting method provided by the present invention with a partial structure omitted, fig. 2 is an exploded schematic view of the overedger 100 shown in fig. 1, and fig. 3 is a schematic structural view of the overedger 100 shown in fig. 1 with a housing 10 omitted. The overedger 100 is mainly used for the serging and sewing of textiles, has wide application in industrial and home sewing, and is an extremely important and precise sewing machine.
The overedger 100 provided by the invention comprises a shell 10, a main shaft 20, a presser foot mechanism 30, a cloth feeding mechanism 40 and a machine head (not shown), wherein the main shaft 20 is arranged inside the shell 10 and is connected with the cloth feeding mechanism 40 and the machine head, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head are all arranged on the shell 10, and the presser foot mechanism 30 is opposite to the cloth feeding mechanism 40 and is arranged close to the machine head.
The shell 10 is used for bearing a main shaft 20, a presser foot mechanism 30, a cloth feeding mechanism 40 and a machine head, the main shaft 20 is connected to a power source (not shown) and can drive the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head to operate under the driving of the power source, the presser foot mechanism 30 is used for pressing cloth conveyed by the cloth feeding mechanism 40 so as to improve the quality of sewing processing, the cloth feeding mechanism 40 is used for conveying the cloth to be processed, and the machine head is used for sewing the cloth conveyed by the cloth feeding mechanism 40. The main shaft 20 drives the cloth feeding mechanism 40 to convey the cloth in a reciprocating manner, and then the press foot mechanism 30 appropriately tensions the cloth, so that the machine head can sew the cloth in a good tensioning state, and the sewing and overlocking process of the overedger 100 is completed.
Of course, in addition to the above-mentioned housing 10, the main shaft 20, the presser foot mechanism 30, the cloth feeding mechanism 40 and the machine head, the overedger 100 may further be provided with auxiliary mechanisms such as a thread passing mechanism and a lubricating mechanism to smoothly complete the sewing process of the overedger, which will not be described herein again.
Referring to fig. 4 to 5, fig. 4 is a schematic structural view of the cloth feeding mechanism 40 shown in fig. 2, and fig. 5 is a schematic structural view of the cloth feeding mechanism 40 shown in fig. 4 from another view angle.
The cloth feeding mechanism 40 comprises two cloth feeding tooth frames 41, a first transmission component 42, a second transmission component 43 and a third transmission component 44, the number of the cloth feeding tooth frames 41 is two, and the two transmission component are respectively an active cloth feeding tooth frame 411 and a differential cloth feeding tooth frame 412, the first transmission component 42 is connected to the active cloth feeding tooth frame 411 and the differential cloth feeding tooth frame 412, and the first transmission component 42 can rotate under the driving of the spindle 20 to drive the active cloth feeding tooth frame 411 and the differential cloth feeding tooth frame 412 to do reciprocating linear motion in a first direction; the second transmission assembly 43 is disposed between the first transmission assembly 42 and the differential feed dog 412, and the second transmission assembly 43 can be driven by the first transmission assembly 42 to drive the differential feed dog 412 to perform reciprocating linear motion in a second direction; the third transmission assembly 44 is disposed between the second transmission assembly 43 and the active feed dog 411, and the third transmission assembly 44 can be driven by the second transmission assembly 43 to drive the active feed dog 411 to move linearly and reciprocally in the second direction.
The driving feed dog 411 is driven by the first transmission assembly 42 to linearly reciprocate along the first direction, driven by the second transmission assembly 43 to linearly reciprocate along the second direction, and the motions of the driving feed dog 411 in the two directions are overlapped to show a reciprocating circular motion in space.
The motion form of the differential feed dog 412 is similar to that of the active feed dog 411, the differential feed dog 412 is driven by the first transmission assembly 42 to move linearly and reciprocally along the first direction, and driven by the third transmission assembly 44 to move linearly and reciprocally along the second direction, and the motions of the differential feed dog 412 in the two directions are overlapped to show a reciprocating circular motion in space.
Since the dragging stroke of the active feed dog 411 and the differential feed dog 412 to the cloth in the second direction is often larger than the moving stroke of the feed dog 41 in the first direction, the reciprocating circular motion of the active feed dog 411 and the differential feed dog 412 has a relatively large stroke in the lateral direction, and the reciprocating circular motion of the active feed dog 411 and the differential feed dog 412 has a relatively small stroke in the first direction, so that the active feed dog 411 and the differential feed dog 412 spatially exhibit reciprocating elliptical motion.
The motion of the active feed dog 411 and the differential feed dog 412 after being higher than the working plane can drag cloth, the motion of the active feed dog 411 and the differential feed dog 412 under the working plane can reset the drag position of the active feed dog, the reciprocating elliptical motion of the active feed dog 411 and the differential feed dog 412 can be matched with the motion of a machine head, the active feed dog 411 and the differential feed dog 412 convey the cloth into the machine head, the machine head sews the current cloth section after the active feed dog 411 and the differential feed dog 412 feed, and the feed dog 41 continues to drag the next section of cloth after the machine head finishes processing the current cloth, so that the cycle and the continuous operation are realized.
The feed dog holder 41 is provided with a feed dog 413 for dragging the cloth, the feed dog 413 can drive the matched presser foot mechanism 30 in the reciprocating elliptical motion of the feed dog holder 41, the feed dog 413 compresses the cloth by utilizing mutual abutting between the feed dog and the presser foot mechanism 30 and the movement in the first direction, and drags the cloth by utilizing the movement in the second direction.
The feed dog 413 comprises a driving dog 4131 arranged on the driving feed dog frame 411 and a differential dog 4132 arranged on the differential feed dog frame 412, the driving dog 4131 for dragging the cloth is arranged on the driving feed dog frame 411, and the driving dog 4131 is provided with a serrated surface to increase the dragging force on the cloth; the differential feed dog bracket 412 is provided with a differential tooth 4132 for dragging the cloth, and the differential tooth 4132 is also provided with a serrated surface to increase the dragging force to the cloth. The driving teeth 4131 and the differential teeth 4132 are arranged at intervals, a gap between the driving teeth 4131 and the differential teeth 4132 is used for providing a processing space of a machine head on the machine head, and the machine head on the machine head processes cloth in the gap between the driving teeth 4131 and the differential teeth 4132, so that the sewing operation is completed.
In this embodiment, the motion of the active feed dog 411 and the motion of the differential feed dog 412 in the first direction are relatively synchronous, and the motion in the second direction is asynchronous, so that the overedger 100 can obtain better sewing effect. Of course, the active feed dog 411 and the differential feed dog 412 may also be moved synchronously.
One end of the driving feed dog 411, which is far away from the driving teeth 4131, and one end of the differential feed dog 412, which is far away from the differential teeth 4132, both extend outwards and form two parallel extension arms 416, a sliding groove 418 extending along the length direction of the feed dog 41 is formed between the two parallel extension arms 416, and the two parallel extension arms 416 are arranged for the feed dog 41 to adjust the integral angle.
Referring to fig. 6 to 8, fig. 6 is a schematic structural view of the cloth feeding dog adjusting mechanism 60 and the cloth feeding dog 41 in the overedger 100 shown in fig. 2, fig. 7 is an exploded schematic view of the cloth feeding dog adjusting mechanism 60 shown in fig. 6, and fig. 8 is an exploded schematic view of the cloth feeding dog adjusting mechanism 60 shown in fig. 7 at another viewing angle.
In order to improve adaptability to different-thickness cloth and improve the flexible manufacturing capability of the whole sewing machine system, the overedger 100 is further provided with a cloth feeding tooth rack adjusting mechanism 60, the cloth feeding tooth rack adjusting mechanism 60 is connected to the cloth feeding tooth rack 41, the cloth feeding tooth 413 is used for changing the feeding state of the cloth with different thicknesses by adjusting the angle and the height of the cloth feeding tooth rack 41, so that the cloth is in a proper tensioning state, and the sewing effect of the cloth with different thicknesses is improved.
The feed dog frame adjusting mechanism 60 is arranged on the side surface of the shell 10 and connected to the feed dog frame 41, the feed dog frame adjusting mechanism 60 comprises an adjusting component 61 and an operating component 62, one end of the adjusting component 61 is connected to the operating component 62, the other end of the adjusting component 61 is connected to the feed dog frame 41, and the adjusting component 61 is used for adjusting the angle of the feed dog frame 41; an operating assembly 62 is provided on the housing 10 for controlling the adjustment assembly 61.
Under the control of the operation assembly 62, the adjustment assembly 61 correspondingly adjusts the inclination angle of the feed dog frame 41 according to the thickness degree of the cloth, so that the inclination angle of the feed dog 413 on the feed dog frame 41 is changed, the height of the feed dog 413 can be changed by the integral inclination of the feed dog 413, and the feed dog 413 can adapt to the cloth with different thickness degrees through the height and inclination angle change of the feed dog 413.
The adjusting assembly 61 comprises an eccentric shaft 611 and an adjusting slider 612, the eccentric shaft 611 is connected to the operating assembly 62, the adjusting slider 612 is sleeved on the eccentric shaft 611 and embedded in two parallel extending arms 416 on the feed dog frame 41, the eccentric shaft 611 can drive the adjusting slider 612 to move under the driving of the operating assembly 62, so as to adjust the angle of the feed dog frame 41.
The eccentric shaft 611 comprises an eccentric section 6111 and a concentric section 6112 connected to the eccentric section 6111, the concentric section 6112 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 6112; the center of the eccentric section 6111 is not concentric with the center of the concentric section 6112, the eccentric section 6111 and the concentric section 6112 are offset by a preset distance, and the eccentric section 6111 can be driven by the concentric section 6112 to rotate.
The adjusting slider 612 is block-shaped, and the inner portion of the adjusting slider 612 is hollow and sleeved with the eccentric section 6111 of the eccentric shaft 611, the adjusting slider 612 is embedded between the two parallel extending arms 416, the adjusting slider 612 is rotatably connected with the eccentric section 6111 of the eccentric shaft 611, and the rotation of the eccentric section 6111 of the eccentric shaft 611 drives the adjusting slider 612 to rotate in parallel.
Because the adjusting slider 612 is embedded between the two parallel extension arms 416, the adjusting slider 612 can slide on the track formed by the extension arms 416, and the adjusting slider 612 can slide in the sliding groove 319 formed between the extension arms 416, so that the movement in the second direction caused by the eccentric shaft 611 can be released, and the parallel rotation of the adjusting slider 612 can only drive the extension arms 416 to ascend or descend in the first direction. The extension arm 416 is disposed at one end of the feed dog 41, and the other end of the feed dog 41 is fixed by the main shaft 20, so that the feed dog 41 is driven to tilt by the rising or falling of the extension arm 416 in the first direction, and the tilt angle of the feed dog 41 is determined by the moving distance of the extension arm 416 in the first direction.
In one embodiment of the present invention, the operating unit 62 adjusts the rotation angle of the eccentric shaft 611 by means of electric control, thereby adjusting the feed dog 41 to a predetermined angle.
Further, the operating unit 62 includes an electric control unit 621 and a transmission unit 622, the transmission unit 622 is disposed between the electric control unit 621 and the eccentric shaft 611, and the electric control unit 621 adjusts the rotation angle of the eccentric shaft 611 through the transmission unit 622 in an electric control manner, so as to adjust the angle and height of the feed dog 413.
In this embodiment, the transmission assembly 622 transmits the power output by the electric control element 621 to the adjusting assembly 61 in a belt transmission manner.
Specifically, the transmission assembly 622 includes a driving wheel 6221, a driven wheel 6222 and a synchronous belt 6223, the driving wheel 6221 is sleeved on the output shaft 6211 of the electric control element 621, the driven wheel 6222 is sleeved on the concentric section 6112 of the eccentric shaft 611, and the synchronous belt 6223 is disposed between the driving wheel 6221 and the driven wheel 6222. The driving wheel 6221 is fixedly connected to an output shaft 6211 of the electric control element 621, the driven wheel 6222 is fixedly connected to a concentric segment 6112 of the eccentric shaft 611, and the driving wheel 6221 transmits the power of the output shaft 6211 of the electric control element 621 through a synchronous belt 6223 and drives the driven wheel 6222 to rotate.
In the present embodiment, the driven wheel 6222 is provided with a threaded fastener 6224, and the threaded fastener 6224 is threaded on the concentric segment 6113 of the eccentric shaft 611 after passing through the center of the driven wheel 6222, so as to fix the driven wheel 6222 and the eccentric shaft 611 to each other.
It will be appreciated that in other embodiments, the driven wheel 6222 may be fixed to the eccentric shaft 611 in other manners, and the threaded fixing member 6224 may be omitted.
The driving wheel 6221 and the driven wheel 6222 are provided with gear teeth on the outer periphery thereof, and the synchronous belt 6223 is provided with a tooth-shaped structure on the inner side thereof, so that the synchronous belt 6223 is meshed with the driving wheel 6221 and the driven wheel 6222. After the electric control element 621 is electrified to generate power, the output shaft 6211 of the electric control element 621 rotates to drive the driving wheel 6221 to rotate, the driven wheel 6222 transmits the rotation power from the driving wheel 6221 through the synchronous belt 6223, the driven wheel and the eccentric shaft 611 fixedly connected with the driven wheel 6222 rotate together, the rotation of the eccentric shaft 611 drives the adjusting slider 612 rotatably connected with the eccentric shaft 611 to change the position in the first direction, and therefore the angle and height adjustment of the feed dog frame 41 is achieved.
The power output of the electric control element 621 drives the eccentric shaft 611 to rotate a certain preset angle through the transmission mode of the synchronous belt 6223, so that the height and the inclination angle of the cloth feeding tooth frame 41 and the cloth feeding tooth 413 can be effectively and accurately adjusted, the sewing of cloth with different thicknesses is further adapted, and the problems of cloth wrinkling or cloth layering and the like are not easy to occur.
Preferably, the synchronous belt 6223 may be an endless belt made of steel wire rope or glass fiber as a strong layer and covered with polyurethane or neoprene, and it is understood that the synchronous belt 6223 may be made of other composite materials as long as a certain strength can be maintained to achieve the purpose of belt transmission.
Further, the driving wheel 6221 is provided with a central through hole, which is fixed on the electric control element 621 in an interference fit with the output shaft 6211 of the electric control element 621; the driven wheel is fixed on the concentric section 6112 of the eccentric shaft 611 through screw pressing, and the two side end faces of the driven wheel 6222 are respectively provided with a positioning plate (not numbered) extending along the radial direction of the driven wheel 6222, and the positioning plates are used for limiting the synchronous belt 6223 from accidentally escaping from the driven wheel 6222 in the axial direction.
Of course, the driving wheel 6221 can also be fixed on the electric control element 621 by means of screw fastening, for example, and the driven wheel 6222 can also be fixed on the concentric segment 6112 by means other than screw fastening; as long as the fixing mode can realize reliable connection and linkage among the driving wheel 6221, the driven wheel 6222 and the synchronous belt 6223.
Further, in order to maintain the conveying efficiency of the timing belt 6223, a tension member (not shown) for urging the timing belt 6223 to a tensioned state is further installed on the timing belt 6223.
Preferably, a tension member is provided in a strip structure, one end of which is fixed to the housing 10 and the other end of which is pressed against the outside of the timing belt 6223, and the tension member 6226 is used to control the tension of the timing belt 6223.
In this embodiment, since the central axis of the output shaft 6211 of the electric control unit 621 is parallel to the central axis of the eccentric shaft 611, the transmission direction of the timing belt 6223 coincides with the rotation direction of the eccentric shaft 611. It is understood that in other embodiments, when the central axis of the output shaft 6211 of the electric control element 621 deviates to other angles from the central axis of the eccentric shaft 611, the central axis of the driving wheel 6221 and the central axis of the driven wheel 6222 may also form other angles, for example, a vertical arrangement or a cross belt transmission formed by the synchronous belt 6223, as long as the electric control element 621 can control the eccentric shaft 611 to rotate by a preset angle through the transmission of the synchronous belt 6223.
It is to be understood that the present invention is not limited to the transmission assembly 622 being capable of only the belt-driven transmission described above; in other embodiments, the transmission assembly 622 may also adopt one or more of chain transmission, worm gear, gear transmission and other transmission modes.
In this embodiment, the electric control element 621 is a stepping motor. It is understood that in other embodiments, the electrical control element 621 may be replaced by other electrically driven elements besides the stepper motor. As long as the electric drive element can realize electric control.
In one embodiment of the present invention, the adjusting assembly 61 further comprises a bushing 613, the bushing 613 is sleeved on the concentric section 6112 of the eccentric shaft 611 and fixed on the housing 10, and the bushing 613 is used for bearing the eccentric shaft 611, so as to provide a stable rotation environment for the eccentric shaft 611. The sleeve 613 has the advantages of corrosion resistance, low cost and the like, and is more suitable for a working condition environment with low-speed rotation.
Further, the sleeve 613 is a copper sleeve. It is understood that in other embodiments, the sleeve may be made of other materials than copper; the sleeve 613 may also be a rolling bearing, regardless of the cost and operating conditions of low speed rotation.
In an embodiment of the present invention, two retaining rings 614 are respectively disposed on two sides of the adjusting slider 612, the two retaining rings 614 are disposed on two sides of the adjusting slider 612 and are sequentially sleeved on the eccentric section 6111 of the eccentric shaft 611 with the adjusting slider 612, and the retaining rings 614 are used to fix the position of the adjusting slider 612 on the eccentric shaft 611 and prevent the adjusting slider 612 from deviating out of the sliding slot 418 due to vibration.
Further, the retainer ring 614 is fixed on the eccentric section 6111 of the eccentric shaft 611 by means of screw compression. Of course, the retainer ring 614 may also be fixed to the eccentric shaft 611 by other methods such as gluing, riveting, etc., as long as the retainer ring 614 can be stably fixed to the eccentric section 6111 of the eccentric shaft 611; the adjustment slider 612 may also employ other elements to achieve its own position limit, and the retainer ring 614 may be omitted.
In order to reset the inclination angle and height of the feed dog frame, so that the overedger 100 can reset the feed dog frame 41 at each time of starting or adjusting, the overedger 100 is further provided with a sensing assembly 63, the sensing assembly 63 is used for sensing and detecting the deflection angle of the eccentric shaft 611, the sensing assembly 63 is electrically connected with a control member, the control member is electrically connected with a driver, and the driver is connected with the eccentric shaft 611 and can drive the eccentric shaft 611 to rotate.
The sensing assembly 63 senses and acquires the deflection angle of the eccentric shaft 611 continuously, when the feed dog frame needs to be reset, the control element drives the driver to operate, the operation of the driver can drive the eccentric shaft 611 connected correspondingly to rotate until the eccentric shaft 611 is located at the angle preset by the control element, and the eccentric rotation of the eccentric shaft 611 can drive the feed dog frame 41 to reset, so that the whole reset process of the feed dog frame 41 is realized.
Wherein, the deflection angle of the eccentric shaft 611 during the resetting process is calculated by the control component according to the detection result of the sensing assembly 63 and the preset angle, that is, the deviation amount between the detection result of the sensing assembly 63 on the deflection angle of the eccentric shaft 611 and the preset angle is the deflection angle of the eccentric shaft 611 during the resetting process.
It should be noted that the angle preset by the control member refers to the target angle to which the eccentric shaft 611 needs to be adjusted, and the feed dog 41 is at the target inclination and height. In the present embodiment, the preset angle refers to an angle of the eccentric shaft 611 when the feed dog 41 is horizontal, and the feed dog 41 is in a horizontal position at this time. Of course, in other embodiments, the preset angle may be other angles than those described above, and the specific selection value of the preset angle may be selected according to the actual operating condition requirement.
In the embodiment, the driver is selected as the electric control element 621, so that the overedger 100 is prevented from being additionally provided with the driver, the number of parts of the whole overedger is reduced, and the compactness of the whole overedger is improved; the control element is selected as the control center of the overedger 100, the control center simultaneously controls the operation of each actuating mechanism of the overedger 100, and the control element is selected as the control center of the overedger 100, so that the requirement for additionally arranging the control element can be avoided, the number of parts of the whole machine is reduced, and the compactness of the whole machine is improved.
At this time, the sensing assembly 63 senses and acquires the deflection angle of the eccentric shaft 611 continuously, when the feed dog frame needs to be reset, the whole machine control center which controls the operation of each actuating mechanism of the overedger 100 drives the electric control element 621 to operate, the electric control element 621 operates and drives the eccentric shaft 611 to rotate to the preset angle position of the control center through the transmission assembly 622, and the rotation of the eccentric shaft 611 drives the feed dog frame 41 to reset to the target inclination angle and height, so that the reset process is realized.
It will be understood that the invention is not limited to the fact that the drive can be selected only as the above-mentioned electric control element 621, and in other embodiments, the overedger 100 can also be provided with an additional drive to effect the adjustment of the deflection angle of the eccentric shaft 611; the present invention also does not limit the control component to be only selected as the whole machine control center of the overedger 100, and in other embodiments, the overedger 100 may further be provided with additional control components such as a control element and a control chip to implement the control of the electric control component 621 and the processing of the detection signal of the sensing component 63.
In the present embodiment, the sensing assembly 63 detects the deflection angle of the eccentric shaft 611 by using the hall effect. The sensing assembly 63 includes a hall sensor 631 and a magnetic element (not shown), the magnetic element is connected to the eccentric shaft 611 and can change position with the change of the deflection angle of the eccentric shaft 611; the hall sensor 631 can sense a magnetic field around itself, and when the position of the magnetic member changes, the hall sensor 631 can obtain the position change amount of the magnetic member through the magnetic field change amount around itself; when the offset between the magnetic member and the hall sensor 631 corresponds to the current angle of the eccentric shaft 611, the hall sensor 631 can detect the current deflection angle of the eccentric shaft 611 through the change of the magnetic field caused by the magnetic member.
In one embodiment of the invention, the magnetic member is magnetic steel. It will be appreciated that in other embodiments, the magnetic member may be a magnetic element other than magnetic steel.
In this embodiment, in order to realize the fixed connection between the magnetic element and the eccentric shaft 611, the magnetic element is disposed on the connecting element 632, the connecting element 632 is substantially in a strip shape, one end of the connecting element is fixed and clamped on the concentric section 6112 of the eccentric shaft 611, and the other end of the connecting element extends out of the eccentric shaft 611 and extends into the space between the hall sensor 631 and the housing 10.
Specifically, one end of the connecting piece 632, which is away from the eccentric shaft 611, is provided with a groove (not shown), and the magnetic member is embedded and fixed in the groove and corresponds to the hall sensor 631. It is understood that in other embodiments, the magnetic member may be fixed at other positions of the eccentric shaft 611 by bonding, screwing, or the like, as long as the magnetic member can be disposed on the connection piece 632 and can be detected by the hall sensor 631.
By providing the connector 632 connected to the eccentric shaft 611 between the eccentric shaft 611 and the hall sensor 631, the connector 632 can support and fix the magnetic member, and the connector 632 can enlarge the deflection angle of the eccentric shaft 611, which is helpful to improve the detection accuracy of the hall sensor 632. Of course, the magnetic member may be directly provided on the eccentric shaft 611, and the connecting member 632 may be omitted.
The sensing assembly 63 is connected with the eccentric shaft 611 through the magnetic member to form a corresponding relationship between the deflection angle of the eccentric shaft 611 and the position of the magnetic member, and the specific position of the magnetic member can be detected and obtained by the hall sensor 631, so that the sensing assembly 63 is used for detecting and obtaining the parameter of the current deflection angle of the eccentric shaft 611.
The hall sensor 631 is electrically connected to the above-mentioned control element, the hall sensor 631 can send the rotation angle parameter obtained by the hall sensor 631 to the above-mentioned control element, and the control element controls the electric control element 621 to rotate to a preset angle according to the parameter, so as to realize the reset process of the feed dog frame 41.
It is to be understood that the present invention is not limited to being able to detect the deflection angle of the eccentric shaft 611 only by using the hall effect; in other embodiments, the sensing assembly 63 may also use other devices and principles such as an angle sensor, a gyroscope, a photoelectric sensor, an encoder, etc. to detect the deflection angle of the eccentric shaft 611.
Further, in order to limit the deflection angle of the eccentric shaft 611 and avoid the problem that the magnetic member moves a too large distance due to the rotation of the eccentric shaft 611 by a too large angle when the machine is stopped, and the magnetic member leaves the detection range of the hall sensor 631, the overedger 100 provided by the present invention has a limiting groove 633 formed on the housing 10, wherein the limiting groove 633 is formed in a fan shape, and the connecting member 632 extends along the radial direction of the fan-shaped limiting groove 633 and can only rotate within a limited angle range.
In this embodiment, the rotatable angle range of the connecting element 632 is limited to 0 to 120 °, that is, the fan-shaped central angle range of the limiting groove 633 is 0 to 120 °; it is understood that in other embodiments, the range of angles over which the connector 632 can rotate can be set to other angles than those described above.
The following explains the principle that the overedger 100 adjusts the angle and height of the feed dog 41 by the feed dog adjusting mechanism 60 to adapt to cloth with different thickness degrees.
When one end of the feed dog frame 41 is changed in height under the adjustment of the feed dog frame adjusting mechanism 60, the inclination angle of the whole feed dog frame 41 is changed, the change of the inclination angle of the whole feed dog frame 41 changes the inclination angle of the feed dog 413, namely the horizontal level of the driving dog 4131 and the differential dog 4132 is changed into the inclined level, and the sewing effect of the machine head is changed due to the height change caused by the inclination angle between the driving dog 4131 and the differential dog 4132 because the driving dog 4131 and the differential dog 4132 respectively feed cloth with different elliptical trajectories.
Referring to fig. 9a to 9c, fig. 9a is a schematic diagram illustrating the feed dog 41 in a normal operating state, fig. 9b is a schematic diagram illustrating the feed dog 41 in a thick material operating state, and fig. 9c is a schematic diagram illustrating the feed dog 41 in a thin material operating state. In the figure, sign S indicates an elliptical motion trajectory of the driving tooth 4131 and the differential tooth 4132, V indicates a tangential direction of the driving tooth 4131 and the differential tooth 4132 when cutting a working plane, and F indicates a direction of elastic force of the driving tooth 4131 and the differential tooth 4132 against the cloth.
(1) When the feed dog frame 41 is in a normal working state: the cloth feeding tooth frame 41 is not inclined, the driving teeth 4131 and the differential teeth 4132 are horizontally level, the driving teeth 4131 and the differential teeth 4132 synchronously contact the cloth, and at the moment, the direction of the elastic force F acted on the cloth by the driving teeth 4131 and the differential teeth 4132 is the same as the tangential angle direction when the driving teeth 4131 and the differential teeth 4132 cut out the working plane, and the vertical direction is the vertical direction, so that the cloth feeding tooth frame is suitable for sewing and processing the cloth with ordinary thickness and moderate hardness.
(2) When the cloth feeding tooth frame 41 is in a thick material working state: the feed dog frame 41 is inclined, so that the height of the driving tooth 4131 is lower than that of the differential tooth 4132, at this time, the direction of the elastic force F acted on the cloth by the driving tooth 4131 and the differential tooth 4132 still keeps the vertical direction, but the tangential angle direction when the working plane is cut by the driving tooth 4131 and the differential tooth 4132 does not keep the vertical direction any more, and the cloth feeding is performed in a beveling manner;
because the height of the driving teeth 4131 is lower than that of the differential teeth 4132, the differential teeth 4132 rise above the needle plate before the driving teeth 4131 and contact the cloth in advance, and the cloth feeding efficiency of the differential teeth 4132 is higher than that of the driving teeth 4131, when the driving teeth 4131 and the differential teeth 4132 feed the cloth, the differential teeth 4132 have a certain catching effect relative to the driving teeth 4131, so that the pushing effect on the cloth is formed, the cloth feeding of thick materials such as multiple layers, peduncles and seams is smooth, the needle pitch is uniform, and the sewing quality is better.
(3) When the cloth feeding tooth rack 41 is in a thin material working state: the feed dog frame 41 is inclined, so that the height of the driving tooth 4131 is higher than that of the differential tooth 4132, at this time, the direction of the elastic force F acted on the cloth by the driving tooth 4131 and the differential tooth 4132 still keeps the vertical direction, but the tangential angle direction of the cutting surfaces of the driving tooth 4131 and the differential tooth 4132 does not keep the vertical direction any more, and the feeding of the cloth is carried out by the driving tooth 4131 and the differential tooth 4132 in a beveling manner;
since the height of the driving teeth 4131 is higher than that of the differential teeth 4132, the driving teeth 4131 rise above the needle plate 13 before the differential teeth 4132 and contact the fabric in advance, and the fabric feeding efficiency of the driving teeth 4131 is higher than that of the differential teeth 4132, when the driving teeth 4131 and the differential teeth 4132 feed the fabric, the driving teeth 4131 have a certain separation effect relative to the differential teeth 4132, so that a dragging effect on the fabric is formed, thin materials such as a screen yarn and the like are flat and not wrinkled, and the sewing quality is better.
It should be emphasized that the above description of the structure of the overedger 100 to which the feed dog resetting method of the present invention is applied is merely for illustrating the basis on which the present invention can be applied, and does not limit the application of the feed dog resetting method of the present invention to the overedger 100 described above. In other embodiments, the feed dog resetting method may also be applied to overedgers of other structures and other types of sewing machines as long as the sewing machine has a feed dog and the feed dog resetting method provided by the present invention can be applied. The specific flow of the feed dog resetting method is described below.
Referring to fig. 10, fig. 10 is a schematic flow chart of a cloth feeding method of a cloth feeding dental frame according to an embodiment of the present invention.
The cloth feeding tooth rack resetting method is applied to an overedging machine and is used for resetting the cloth feeding tooth rack in the overedging machine, so that the cloth feeding tooth rack can be reset to a preset position when the overedging machine is started.
In one embodiment of the invention, the preset position is a position of the feed dog frame in a horizontal state, and it is understood that in other embodiments, the preset position may be set to other positions besides the horizontal state, and the specific preset position may be selected according to actual conditions.
The overedger applying the cloth feeding tooth rack resetting method further comprises a control piece, a driver and a cloth feeding tooth rack adjusting mechanism, wherein the cloth feeding tooth rack adjusting mechanism comprises an adjusting assembly, the adjusting assembly comprises an adjusting slide block and an eccentric shaft penetrating through the adjusting slide block, and the adjusting slide block is embedded in the cloth feeding tooth rack and can slide relative to the cloth feeding tooth rack.
The cloth feeding tooth rack resetting method comprises the following steps:
and step S10, the control element sends out a reset instruction when the overedger is started. Specifically, the control element is used for controlling the driver, and when the overedger is started, the control element sends a reset instruction to the driver; the reset command is sent out by a control part in the form of an electric signal and received by the driver; the reset command can indicate the operation of the drive and the specific number of revolutions the drive operates, which is related to the preset inclination and height to which the feed dog needs to be adjusted.
And step S20, the driver receives the reset instruction and controls the eccentric shaft to rotate. Specifically, the driver is electrically connected with the control element and mechanically connected with the eccentric shaft, and the driver can drive the eccentric shaft to rotate under the control of the control element; and the driver starts to operate after receiving the reset instruction, and the driver outputs a rotation driving force to the eccentric shaft at the moment.
And step S30, the eccentric shaft drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
Specifically, the eccentric shaft comprises a concentric section and an eccentric section connected to the concentric section, the concentric section of the eccentric shaft is fixed on a shell of the overedger, and the eccentric shaft can rotate around the central axis of the concentric section; the center of the eccentric section is not concentric with the center of the concentric section, the eccentric section and the concentric section deviate by a preset distance, and the eccentric section can be driven by the concentric section to orbit;
the eccentric section of the eccentric shaft penetrates through the sleeving sliding block, the adjusting sliding block is embedded on two parallel extending walls of the cloth feeding tooth rack and can slide along the length direction of the cloth feeding tooth rack and lift along the height direction of the cloth feeding tooth rack under the eccentric rotation of the eccentric shaft, the lifting of the adjusting sliding block on the cloth feeding tooth rack can drive the cloth feeding tooth rack connected with the adjusting sliding block to lift at one end, so that the adjustment of the integral inclination angle of the cloth feeding tooth rack is realized, and the integral height of the cloth feeding tooth rack is changed after the inclination angle of the cloth feeding tooth rack is changed, so that the adjustment of the height of the cloth feeding tooth rack is realized; the adjusting slide block drives the cloth feeding tooth frame to a preset inclination angle and height, and the cloth feeding tooth frame is reset.
The preset inclination angle of the feed dog frame refers to a target inclination angle to which the feed dog frame needs to be adjusted, and the preset height of the feed dog frame refers to a target height to which the feed dog frame needs to be adjusted. In this embodiment, the preset inclination angle of the feed dog frame is an inclination angle when the feed dog frame is in a horizontal position, that is, 0 °; the preset height of the feed dog frame is the height of the feed dog frame in the horizontal state.
Of course, in other embodiments, the specific values of the preset inclination angle and the preset height of the feed dog holder can be selected according to actual working condition requirements.
In the first embodiment of the present invention, the control member is started up together with the overlock machine, and the step S10 of "the control member issues a reset instruction when the overlock machine is started up" specifically includes the step S11:
and step S11, starting the control piece together with the overedger, and sending a reset instruction to the driver by the control piece.
Specifically, the control piece and the overedger are started simultaneously, so that the standby time of the control piece can be shortened, the working time of the control piece is shortened, the working life of the control piece is prolonged, and the reliability and the stability of the whole overedger are improved.
At this time, the cloth feeding dental frame resetting method provided by the invention comprises the following steps:
and step S11, starting the control piece together with the overedger, and sending a reset instruction to the driver by the control piece.
And step S20, the driver receives the reset instruction and controls the eccentric shaft to rotate.
And step S30, the eccentric shaft drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
Of course, in other embodiments, the control element may be activated all the time, that is, the control element is activated regardless of whether the overedger is in the on state; the control element is started all the day, so that the time for waiting for the control element to be started can be reduced, the situation that the overedger needs to wait for the control element in a standby mode due to the fact that the control element is started for too long time is avoided, and production efficiency is improved.
In the second embodiment of the present invention, the reset command inputted in step S10 is inputted into the control unit by an operator through an input device (not shown), the input device is electrically connected to the controller, and the control unit resets the command to be sent to the driver after the input device inputs the reset command into the controller.
At this time, step S10 includes steps S12 and S13:
step S12, the operator inputs a reset instruction to the control piece through the input device;
step S13, the control issues a reset command to the driver.
Preferably, the input device is an operation panel on which an operator can operate to generate a control signal (i.e., a reset command) for resetting the feed dog through the operation panel. The operation panel is used as an input source of the reset instruction, a man-machine interaction device can be provided, and an operator can control the inclination angle and the height of the cloth feeding tooth rack through the operation panel; step S12 now specifically includes step S121:
and step S121, inputting a reset instruction to the control piece through the operation panel by an operator.
Further, the operation panel is further provided with suggestion keys, and an operator can further set adjustment parameters through the suggestion keys, for example, set an inclination angle and a height to which the feed dog frame needs to be adjusted, so as to improve convenience of operation, at this time, the step S121 specifically includes the step S122:
and step S122, the operator inputs a reset instruction to the control piece through the suggestion key of the operation panel.
At this time, the cloth feeding dental frame resetting method provided by the invention comprises the following steps:
and step S122, the operator inputs a reset instruction to the control piece through the suggestion key of the operation panel.
Step S13, the control issues a reset command to the driver.
And step S20, the driver receives the reset instruction and controls the eccentric shaft to rotate.
And step S30, the eccentric shaft drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
It is understood that the input of the reset instruction can also be realized by other devices besides the operation panel, that is, the input device can also realize the instruction input to the control component by other devices besides the operation panel; in addition, the reset command may be generated without being input by an external input device, and in other embodiments, the reset command may be automatically generated at the time of power-on without being input by an external input device.
In a third embodiment of the present invention, the overlock machine further includes a sensing component electrically connected to the control component, the sensing component is capable of sensing a deflection angle of the eccentric shaft and transmitting a detection result to the control component in an electrical signal manner, and the control component is capable of receiving the deflection angle of the eccentric shaft detected by the sensing component and sending a reset command accordingly.
When the overedger is provided with the sensing assembly, the step S10 of "the control member issues a reset command when the overedger is started" includes the following steps S14 and S15:
and step S14, sensing the deflection angle of the eccentric shaft by the sensing assembly.
And step S15, the control element sends a reset instruction according to the deflection angle of the eccentric shaft detected by the induction assembly when the overedger is started.
Specifically, the sensing assembly continuously senses and acquires the deflection angle of the eccentric shaft, when the cloth feeding tooth rack needs to be reset, the whole machine control center for controlling the operation of each actuating mechanism of the overedger drives the electric control element to operate, the electric control element operates and drives the eccentric shaft to rotate to the angle preset by the control center through the transmission assembly, and the rotation of the eccentric shaft drives the cloth feeding tooth rack to reset to the target inclination angle and height, so that the reset process is realized.
When the deflection angle is required to be described, the deflection angle refers to an angle deviation of the eccentric shaft when the current position is opposite to the target position, the sensing assembly can detect the current angle of the eccentric shaft, and the deflection angle is directly calculated by an internal processor and then transmitted to the control element in the form of an electric signal; the sensing assembly can also only detect the current angle of the eccentric shaft, and then the current angle is directly sent to the control part, and the control part directly processes and calculates to obtain the deflection angle.
Both of the above two ways are covered in the step of sensing the deflection angle of the eccentric shaft by the sensing component.
The specific deflection angle of the eccentric shaft before adjustment is known by the sensing assembly, the sensing assembly transmits the detected specific deflection angle of the eccentric shaft before adjustment to the control element in the form of an electric signal, and the control element calculates the output rotating speed of the driving element according to the specific deflection angle, so that the cloth feeding tooth rack is adjusted to a preset inclination angle and height. After the induction assembly is arranged, the overedger can automatically realize adjustment after being started, the adjustment amount of the eccentric shaft to be adjusted does not need to be input by an operator, and the automation degree of the overedger is improved.
At this time, the cloth feeding dental frame resetting method provided by the invention comprises the following steps:
and step S14, sensing the deflection angle of the eccentric shaft by the sensing assembly.
And step S15, the control element sends a reset instruction according to the deflection angle of the eccentric shaft detected by the induction assembly when the overedger is started.
And step S20, the driver receives the reset instruction and controls the eccentric shaft to rotate.
And step S30, the eccentric shaft drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to a preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
Further, the sensing assembly detects the deflection angle of the eccentric shaft by using hall effect, when the step S14 specifically includes the step S141:
step S141: the induction assembly senses the deflection angle of the eccentric shaft through a Hall effect.
Specifically, the sensing assembly comprises a hall sensor and a magnetic part (not shown), wherein the magnetic part is connected with the eccentric shaft and can change the position along with the change of the deflection angle of the eccentric shaft; the Hall sensor can sense a magnetic field around the Hall sensor, and when the position of the magnetic part is changed, the Hall sensor can calculate the position change of the magnetic part through the magnetic field change around the Hall sensor; when the offset between the magnetic part and the Hall sensor corresponds to the current angle of the eccentric shaft, the Hall sensor can detect the current deflection angle of the eccentric shaft through the change of the magnetic field caused by the magnetic part.
The deflection angle of the eccentric shaft is sensed through the Hall effect, so that the detection precision is high, the environmental interference resistance is high, and the cost is low.
Of course, in other embodiments, the sensing assembly may also use other devices and principles such as an angle sensor, a gyroscope, etc. to detect the deflection angle of the eccentric shaft.
The cloth feeding tooth rack adjusting mechanism further comprises an operating assembly, the operating assembly comprises an electric control element and a transmission assembly, the transmission assembly is arranged between the electric control element and the eccentric shaft, the output kinetic energy of the electric control element can be transmitted to the eccentric shaft through the transmission assembly, and the electric control element controls the eccentric shaft to rotate under the transmission action of the transmission assembly and drives the adjusting slide block to adjust the inclination angle and the height of the cloth feeding tooth rack.
In one embodiment of the invention, the driver is an electrically controlled element in the operating assembly; by the arrangement, the overedger can be prevented from being provided with an additional driving source, the number of parts of the whole overedger can be reduced, and the compactness of the whole overedger is improved.
The overlock machine also has a control center for controlling the operation of various components of the overlock machine, such as the operation of the head, the rotation of the spindle, etc.
In one embodiment of the invention, the control element is selected as a control center of the overedger, and the control element is selected as the control center of the overedger, so that the integrated control of the overedger can be realized, the number of parts of the whole overedger is reduced, and the compactness of the whole overedger is improved.
It is understood that the present invention does not limit the driver to be selected as the electric control element in the operating assembly, and in other embodiments, the driver may not use the electric control element in the operating assembly, but may adjust the deflection angle of the eccentric shaft by means of an additional arrangement such as a cylinder, an electromagnet, or another motor;
in the same way, the invention does not limit that the control element can only be selected as the complete machine control center of the overedger, and in other embodiments, the control element can also control the operation of the driver through an additionally arranged control element such as a control chip instead of the complete machine control center of the overedger.
In one embodiment of the invention, the transmission assembly transmits the power output by the driver to the eccentric shaft in a belt transmission manner. It is understood that in other embodiments, the transmission assembly may also adopt other transmission modes such as chain transmission, gear transmission, worm and gear transmission and the like.
The cloth feeding tooth rack resetting method provided by the invention can realize the resetting of the cloth feeding tooth rack after the overedger is started, so that the cloth feeding tooth rack can be adjusted based on the initial position during subsequent adjustment, the adjustment failure is avoided, and the reliability of the overedger is improved. The overedger applying the method is accurate in adjustment and has wider application prospect.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. A cloth feeding tooth rack resetting method is applied to an overlock machine and is characterized in that the cloth feeding tooth rack resetting method is used for resetting a cloth feeding tooth rack in the overlock machine from different inclination angles and heights to a preset inclination angle and height, the overlock machine comprises a cloth feeding tooth rack adjusting mechanism, a control piece and a driver, the cloth feeding tooth rack adjusting mechanism comprises an adjusting assembly, the adjusting assembly comprises an adjusting slide block and an eccentric shaft, the adjusting slide block is embedded in the cloth feeding tooth rack, the eccentric shaft penetrates through the adjusting slide block and is connected to the driver, the control piece is electrically connected to the driver, and the cloth feeding tooth rack resetting method comprises the following steps:
the control piece sends a reset instruction when the overedger is started;
the driver receives the reset instruction and controls the eccentric shaft to rotate;
the driver drives the eccentric shaft to rotate and drives the adjusting slide block to slide and lift on the cloth feeding tooth frame, and the cloth feeding tooth frame is adjusted to the preset inclination angle and height by the lifting of the adjusting slide block on the cloth feeding tooth frame.
2. The feed dog carrier resetting method according to claim 1, wherein the overedger is provided with a sensing assembly for sensing a deflection angle of the eccentric shaft, and the step of issuing the reset command by the control member when the overedger is started comprises:
the sensing component senses the deflection angle of the eccentric shaft,
and the control part sends a reset instruction according to the deflection angle of the eccentric shaft detected by the induction assembly when the overedger is started.
3. The feed dog restoring method according to claim 2, wherein the sensing of the deflection angle of the eccentric shaft by the sensing unit comprises:
the induction assembly senses the deflection angle of the eccentric shaft through a Hall effect.
4. The feed dog rack resetting method of claim 1, wherein the overedger includes an input device electrically connected to the control member, and the step of issuing a reset command by the control member when the overedger is started includes:
an operator inputs a reset instruction to the control piece through an input device;
the control member issues a reset command to the driver.
5. The feed dog rack resetting method according to claim 4, wherein the input device is an operation panel, the overedger is started, and the step of inputting the resetting instruction into the control member by the operator through the input device comprises:
and an operator inputs a reset instruction to the control piece through the operation panel.
6. The feed dog frame resetting method according to claim 5, wherein an advise button is arranged on the operation panel, the overedger is started, and the step of inputting the resetting instruction into the control part by an operator through the operation panel comprises the following steps:
and the operator inputs a reset instruction to the control piece through the suggestion key of the operation panel.
7. The feed dog rack resetting method according to claim 1, wherein the step of issuing a reset command by the control member when the overedger is started comprises:
the control piece and the overedger are started together, and the control piece sends a reset instruction to the driver.
8. The feed dog frame resetting method according to claim 1, wherein the feed dog frame adjusting assembly comprises an operating assembly, the operating assembly comprises an electric control element and a transmission assembly, the electric control element controls the eccentric shaft to rotate under the transmission action of the transmission assembly and drives the adjusting slide block to adjust the inclination angle and the height of the feed dog frame; the overedger is provided with a control center, and the control center is used for controlling the operation of the overedger.
9. Feed dog resetting method according to claim 8, wherein the actuator is integrated with the electrical control element and/or
The control member is integrated with the control center.
10. The feed dog restoring method according to claim 8, wherein the transmission assembly is at least one of a chain transmission, a belt transmission, a gear transmission, and a worm transmission.
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| CN112853631B (en) * | 2019-11-28 | 2022-07-05 | 杰克科技股份有限公司 | Flat seaming machine |
| CN112160078B (en) * | 2020-08-13 | 2021-11-02 | 杰克缝纫机股份有限公司 | Cloth feeding tooth frame adjusting mechanism and overedger |
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