CN109371586B - Sewing machine capable of automatically adjusting take-up according to thickness of sewing material and take-up adjusting method thereof - Google Patents
Sewing machine capable of automatically adjusting take-up according to thickness of sewing material and take-up adjusting method thereof Download PDFInfo
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- CN109371586B CN109371586B CN201811527329.8A CN201811527329A CN109371586B CN 109371586 B CN109371586 B CN 109371586B CN 201811527329 A CN201811527329 A CN 201811527329A CN 109371586 B CN109371586 B CN 109371586B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
Abstract
The invention provides a sewing machine and a method for adjusting take-up aiming at automatic adjustment of the thickness of a sewing material, which comprises the following steps: the sewing material thickness detection assembly is used for detecting the thickness of the sewing material and comprises a detection sensor; the take-up mechanism comprises a take-up lever, a connecting rod assembly and a driving piece fixedly arranged, the take-up lever is a bending piece, the bending part is rotatably arranged, one end of the take-up lever is provided with a wire passing hole, one end of the connecting rod assembly is connected with the driving piece, the other end of the connecting rod assembly is connected with the other end of the take-up lever, and the driving piece drives the connecting rod assembly to swing in a reciprocating mode so that the wire passing hole of the take-up lever is located at the lowest point or the; the controller, the driving piece and the detection sensor are all connected with the controller. According to the invention, by controlling the action time of the driving piece, the thread take-up time is changed when the stroke of the thread through hole of the thread take-up lever is not changed, so that the thread take-up is adjusted in real time along with the thickness of the sewing material.
Description
Technical Field
The invention relates to the technical field of sewing machines, in particular to a thread take-up mechanism for a sewing machine and the sewing machine.
Background
The sewing machine is a machine for sewing a sewing material through a sewing thread, and comprises a needle rod mechanism, a thread take-up mechanism, a feeding mechanism, a thread hooking mechanism, a pressing mechanism, a thread clamping device and the like. The thread take-up and threading mechanism guides and conveys the thread on the thread roll to the sewing needle and is matched with the needle rod mechanism to feed the thread.
In the conventional sewing machine, a thread take-up mechanism is provided on a head 1, as shown in fig. 1 and 2, the thread take-up mechanism generally includes: the thread take-up device comprises a thread take-up lever 30 and a thread take-up crank 40, wherein the thread take-up lever 30 is provided with a thread through hole 301, a thread can pass through the thread through hole 301, one end of a thread take-up connecting rod 20 is hinged on a machine shell in a relatively rotatable mode, the other end of the thread take-up connecting rod 20 is hinged with the thread take-up lever 30, one end of the thread take-up lever 30 is hinged on the thread take-up crank 40 in a relatively rotatable mode, and the thread take-up crank 40 is fixed on a sewing. The sewing machine rotates under the drive of the sewing machine main shaft 10 through the take-up crank 40, the take-up crank 40 drives the take-up lever 30 to move, that is, the thread passing hole 301 moves in space, as shown in fig. 3 and 4, t1 is the time corresponding to the highest point of the thread passing hole 301 in the take-up process, t2 is the time corresponding to the lowest point of the thread passing hole 301 in the take-up process, and H is the movement stroke of the take-up hole 301, that is, the take-up stroke, that is, the Z coordinate height difference between the highest point and the lowest point. In the existing sewing machine, t1, t2 and H are all determined by the structure size of the thread take-up mechanism, and cannot be adjusted.
Because the size parameters of the thread picking mechanism in the existing sewing machine are fixed values, the adjustment of the thread picking time and the thread picking stroke is difficult to realize, and the thread picking mechanism cannot adapt to the sewing of sewing materials with different thicknesses, so that the thread picking mechanism with the adjustable thread picking time is needed.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a sewing machine and an automatic adjusting and winding method for automatically adjusting and winding a sewing material according to a thickness of the sewing material, so as to solve a problem that a thread take-up mechanism of the sewing machine in the prior art cannot adapt to a thickness of a cloth.
To achieve the above and other related objects, the present invention provides a sewing machine for automatically adjusting a take-up line according to a thickness of a sewing material, comprising:
the sewing material thickness detection assembly is used for detecting the thickness of the sewing material and comprises a detection sensor;
the take-up mechanism comprises a take-up lever, a connecting rod assembly and a driving piece fixedly arranged, the take-up lever is a bending piece, the bending part is rotatably arranged, one end of the take-up lever is provided with a wire passing hole, one end of the connecting rod assembly is connected with the driving piece, the other end of the connecting rod assembly is connected with the other end of the take-up lever, and the driving piece drives the connecting rod assembly to swing in a reciprocating mode so that the wire passing hole of the take-up lever is located at the lowest point or the highest point;
and the driving piece and the detection sensor are connected with the controller.
Preferably, the driving part drives the connecting rod assembly to swing in a reciprocating manner, so that the connecting rod assembly is in three states, the first state and the second state are symmetrically located on two sides of the third state, the third state is in a linear state, the first state and the second state respectively enable the thread passing hole of the take-up lever to be located at the highest point, and the third state enables the thread passing hole of the take-up lever to be located at the lowest point.
Preferably, the driving part drives the connecting rod assembly to swing back and forth between two states, the first state enables the thread passing hole of the take-up lever to be at the lowest point, and the second state enables the thread passing hole of the take-up lever to be at the highest point.
Preferably, the connecting rod assembly comprises a first connecting rod and a second connecting rod which are hinged with each other, the first connecting rod is connected with the driving piece, and the second connecting rod is hinged with the other end of the take-up lever.
Preferably, the driving member is a rotary electric machine.
Preferably, the swing angle of the connecting rod assembly is adjustable by the rotating motor under the control of the controller, so that the stroke of the thread guide hole of the thread take-up lever is changed.
Preferably, the rotating motor is in rotating fit with a main shaft of the sewing machine under the control of the controller, and the thread take-up time is changed when the stroke of the thread through hole of the thread take-up lever is not changed.
Preferably, the detection sensor comprises a detected piece and a fixed detection piece, the detected piece is arranged on the presser bar, the detection piece is matched with the detected piece and used for detecting the axial movement distance of the presser bar, the axial movement distance of the presser bar is represented as the thickness of the sewing material, and the detection piece is connected with the controller.
Preferably, the detected piece is installed on the presser bar through a fixed seat, and the detected piece is fixed on a shell of the sewing machine.
Preferably, the top of presser foot pole is equipped with compression spring, detection sensor is used for detecting compression spring's deformation volume, compression spring's deformation volume representation is sewing material thickness.
The invention also provides a method for adjusting the take-up of the sewing machine, which comprises the following steps:
presetting a sewing material thickness set in a controller, wherein the sewing material thickness set comprises a plurality of thickness sets, and the thickness interval in each thickness set is different;
the sewing material thickness detection component detects the thickness of the sewing material in real time and feeds the thickness back to the controller;
the controller judges which thickness set the current sewing material is in according to the received current sewing material thickness, and enables the driving piece to execute a normal sewing strategy, an advance line-winding sewing strategy or a delay line-winding strategy according to the current thickness set.
Preferably, the action time of the driving piece is controlled to be matched with a main shaft of a sewing machine in the sewing machine in a rotating angle mode, so that an advance line-winding sewing strategy or a delay line-winding strategy is achieved.
Preferably, the sewing strategy of the advance winding is as follows: controlling the action time of the driving piece to be earlier than the action time of the driving piece in the normal sewing strategy.
Preferably, the delayed take-up sewing strategy is as follows: controlling the action time of the driving piece to be delayed from the action time of the driving piece in the normal sewing strategy.
As described above, the sewing machine and the method for adjusting the take-up thereof, which are provided by the invention, have the following beneficial effects: when the stroke of the thread passing hole of the thread taking-up rod is unchanged, the action time of the driving piece is adjusted, so that the driving piece is in rotating fit with the spindle of the sewing machine to change the thread taking-up time, the thread taking-up is adjusted in real time along with the thickness of sewing materials, and a better sewing effect is achieved.
Drawings
FIG. 1 is a schematic view of a thread take-up mechanism of a sewing machine according to the prior art.
Fig. 2 is a schematic diagram of a thread take-up mechanism of a sewing machine according to the prior art.
FIG. 3 is a diagram of a thread hole trajectory of a take-up lever in the prior art.
FIG. 4 is a diagram showing the relationship between the thread passing hole trajectory of the take-up lever and the rotation angle of the main shaft of the sewing machine in the prior art.
FIG. 5 is a view showing an embodiment of the present invention of a sewing machine for automatically adjusting the take-up of a sewing material.
FIG. 6 is a first state diagram of the thread take-up mechanism in the embodiment shown in FIG. 5.
FIG. 7 is a second state diagram of the thread take-up mechanism in the embodiment shown in FIG. 5.
FIG. 8 is a diagram showing the relationship between the thread passing hole trajectory of the thread take-up lever of the present invention and the rotation angle of the main shaft of the sewing machine.
FIG. 9 is a view showing the effect of the thread when the take-up lever of the present invention is advanced or delayed.
FIG. 10 is a view showing a relationship between a thread take-up stroke of the thread take-up lever of the present invention and an angle of rotation of a main shaft of the sewing machine.
FIG. 11 is a schematic view of a seam material thickness detecting assembly according to the present invention.
FIG. 12 is a view showing the state of detecting the thickness of the fabric according to the present invention.
FIG. 13 is a graph showing the relationship between the thickness of the sewing material and the sewing time according to the present invention.
Fig. 14 is a view showing another embodiment of the sewing machine for automatically adjusting the take-up of the sewing material according to the present invention.
FIG. 15 is a first state view of the thread take-up mechanism in the embodiment shown in FIG. 14.
FIG. 16 is a second state view of the thread take-up mechanism in the embodiment shown in FIG. 14.
FIG. 17 is a third state view of the thread take-up mechanism in the embodiment shown in FIG. 14.
Description of the element reference numerals
1 machine head
2 driving member
3 first link
4 second connecting rod
5 thread take-up lever
51 wire through hole
6 feed dog
7 shaft sleeve
8 presser foot
9 needle plate
10 Main shaft of sewing machine
11 presser foot rod
12 compression spring
20 take-up connecting rod
30 take-up lever
301 line passing hole
40 take-up crank
100 detection sensor
101 detected object
102 detection piece
103 connecting base
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 17. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 5 to 17, the present invention provides a sewing machine for automatically adjusting a take-up line according to a thickness of a sewing material, including:
the sewing material thickness detection assembly is used for detecting the thickness of the sewing material and comprises a detection sensor 100;
the take-up mechanism comprises a take-up lever 5, a connecting rod assembly and a driving part 2 fixedly arranged, wherein the take-up lever 5 is a bending part, the bending part is rotatably arranged, one end of the take-up lever 5 is provided with a wire passing hole 51, one end of the connecting rod assembly is connected with the driving part 2, the other end of the connecting rod assembly is connected with the other end of the take-up lever 5, and the driving part 2 drives the connecting rod assembly to swing in a reciprocating mode so that the wire passing hole 51 of the take-up lever 5 is located at the lowest point or the highest point;
and a controller (not shown), wherein the driving member 2 and the detection sensor 100 are connected with the controller.
The sewing machine of the present invention further includes other functional components in a common sewing machine, such as a sewing machine main shaft and a cloth feeding mechanism, a presser foot and a presser foot lifting mechanism, etc. connected to the sewing machine main shaft (i.e. the sewing machine main shaft 10 in the background art) are arranged in the machine head 1, and the movement of the cloth feeding dog 6 in the cloth feeding mechanism realizes the advance of the sewing material, so that the sewing machine completes the sewing, i.e. the sewing machine of the present embodiment has basic mechanisms required for sewing, and will not be described in detail herein. According to the invention, through the design of the take-up lever 5 and the connecting rod assembly, the driving part 2 can enable the connecting rod assembly to swing in a reciprocating manner, so that the thread take-up time can be changed by rotating and matching with the main shaft of the sewing machine when the stroke of the thread through hole of the take-up lever is not changed, the thread take-up lever is suitable for sewing thick and thin sewing materials, and the thread take-up amount can be adjusted according to different rotating shuttles.
The connecting rod assembly in this embodiment includes a first connecting rod 3 and a second connecting rod 4, which are hinged to each other, the first connecting rod 3 is connected to the driving member 2, and the second connecting rod 4 is hinged to the other end of the thread take-up lever 5. The connecting rod assembly in the embodiment is two connecting rods which are hinged and connected, the structure is simple, the use is easy, in addition, the thread take-up lever 5 is a bending piece, the bending part is arranged in a rotating mode, the second connecting rod 4 is connected with the other end of the thread take-up lever 5, the thread take-up lever 5 is driven to rotate conveniently, the two hinged connecting rods can facilitate the installation and the setting of the driving piece 2, and the driving piece 2 is convenient to install in the machine head of the sewing machine.
In the present embodiment, the driving member 2 is a rotating electric machine. In the embodiment, the swing angle and the swing time of the first link 3 are controlled by the rotating motor, and then the highest point time t1, the lowest point time t2 and the thread take-up stroke H of the thread passing hole on the thread take-up lever 5 are controlled by the rotation of the sewing machine main shaft.
The relationship between the track of the thread passing hole on the take-up lever and the time and the swing angle of the driving member in the embodiment is specifically analyzed as follows:
in the embodiment, the driving member 2 is a rotating motor, which is connected to the controller (not shown), and under the control of the controller, the swing angle of the connecting rod assembly is adjustable, so as to change the stroke of the thread guiding hole of the thread take-up lever 5; the sewing machine main shaft 10 drives the cloth feeding mechanism to realize the advancing of sewing materials, the action time of the driving piece 2 is matched with the swing angle of the sewing machine main shaft 10 to form a relative time sequence between the two, and the relation between the thread passing hole stroke of the take-up lever 5 and the swing angle of the sewing machine main shaft 10 can be changed by changing the relative time sequence, so that the thread taking time can be changed when the thread passing hole stroke of the take-up lever 5 is not changed.
The swing angle of the first connecting rod 3 is controlled by the rotating motor, so that the thread take-up time can be advanced or delayed under the condition of ensuring that the thread take-up stroke H is not changed, as shown in a graph showing the relation between the thread through hole stroke of the thread take-up lever and the angle of the main shaft of the sewing machine, the rotation angle of the main shaft of the sewing machine corresponding to the time t1 when the thread through hole in a2 is at the highest point is about 70 degrees, the rotation angle of the main shaft of the sewing machine corresponding to the time t2 when the thread through hole is at the lowest point is about 295 degrees, and the a2 represents the relation curve between the thread through hole stroke and the angle of the; in the a1 thread, the rotation angle of the corresponding main shaft at the time t1 when the thread passing hole is at the highest point is about 90 degrees, the rotation angle of the corresponding main shaft at the time t2 when the thread passing hole is at the lowest point is about 315 degrees, the a1 thread represents the relation curve of the thread passing hole stroke and the rotation angle of the main shaft of the sewing machine during delayed sewing, and the thread passing holes are delayed for a certain time compared with the a2 thread and then reach the highest point and the lowest point, namely, if the thread state is changed from the a2 thread state to the a1 thread state, the action time of the driving element 2 only needs to be started a period later than the a2 thread; in the a3 thread, the rotation angle of the thread passing hole corresponding to the main shaft of the sewing machine is about 45 degrees at the time t1 when the thread passing hole is at the highest point, the rotation angle of the thread passing hole corresponding to the main shaft of the sewing machine is about 280 degrees at the time t2 when the thread passing hole is at the lowest point, the a3 thread represents a relation curve of the thread passing hole stroke and the main shaft rotation angle of the sewing machine during the advance sewing, the thread passing holes reach the highest point and the lowest point in advance by a certain time compared with the a2 thread, namely, if the thread passing state is changed into the a3 thread state from the a2 thread state, the action time of the driving piece 2 is. Therefore, under the control of the controller, the rotating motor (i.e. the driving element 2) enables the relative time sequence between the swing time of the connecting rod assembly and the rotation angle of the sewing machine main shaft 10 to be adjustable, namely the thread taking-up time is changed when the thread passing hole stroke of the thread taking-up rod 5 is not changed.
In the embodiment, the take-up time of the take-up lever and the sewing stitch are analyzed, as shown in fig. 9, the curve with an arrow in the figure is the sewing thread; when the thread taking-up time is advanced (the thread taking-up rod shown on the left side of fig. 9 is advanced), the thread is not clamped by the sewing material and the needle plate when the thread taking-up rod 5 starts to take up the thread, the resistance of the thread taking-up rod 5 in taking-up is small, so that the thread is more easily tightened, and the novel thread taking-up device is suitable for the thick fabric; when the thread take-up time is delayed (namely, the take-up time of the thread take-up lever shown on the right side of fig. 9 is delayed), part of the thread is clamped by the sewing material and the needle plate when the thread take-up lever 5 starts to take up the thread, so that the resistance of take-up of the thread take-up lever 5 is increased, the thread is not easy to tighten, and the thread take-up lever is suitable for the sewing material which is thin in thickness and easy to wrinkle. Therefore, the sewing machine is suitable for delaying the thread picking time (namely, the a1 thread can be adjusted and used) when sewing a thin sewing material, and is suitable for advancing the thread picking time (namely, the a3 thread can be adjusted and used) when sewing a thick sewing material in the using process so as to achieve the optimal sewing stitch seam. Therefore, the take-up mechanism of the embodiment can be used for regulating and controlling the thickness of the sewing material, the regulation and the control are easy to realize, only the action time of the driving piece 2 needs to be regulated, the take-up delay of the take-up lever 5 can be realized after the action time is delayed (such as a1 thread), and the take-up advance of the take-up lever can be realized after the action time is advanced (such as a3 thread).
Therefore, in the embodiment, the detection sensor 100 in the seam material thickness detection assembly can detect the seam material in real time, and the controller determines whether the line needs to be taken up in advance or delayed according to the current seam material thickness value, so as to control the driving member to execute the line.
In this embodiment, the swing angle of the link assembly can be adjusted under the control of the controller to change the stroke of the thread guiding hole of the thread take-up lever 5. FIG. 10 is a diagram showing the relationship between the thread passing hole stroke of the thread take-up lever and the rotation angle of the main shaft of the sewing machine, wherein the thread passing hole stroke H of the thread take-up lever 5 in the thread l2 is the stroke height during normal sewing; l1 thread, the thread passing hole stroke of the thread take-up lever 5 is larger than the thread passing hole stroke H in normal sewing; l3 the thread-passing hole stroke of the thread-taking-up lever 5 is smaller than the thread-passing hole stroke H in normal sewing. Fig. 10 shows that the actuation time of the driving element in this embodiment is unchanged, that is, the times when the travel of the thread passing holes in the lines l1, l2 and l3 reaches the highest point and the lowest point are the same, the actuation time of the driving element 2 in the three lines is all at the same rotation angle of the main shaft of the sewing machine, and only the swing angle of the connecting rod assembly is changed; the embodiment ensures that the thread picking stroke H is increased or decreased under the condition that the thread picking time is not changed (namely the action time of the driving piece is not changed with the matching time sequence of the rotation of the main shaft of the sewing machine), so as to adapt to the rotating shuttles with different thread quantity requirements.
The specific structure of each component is described in detail below.
Embodiment one of the thread take-up mechanism
The thread take-up mechanism of the embodiment includes: the take-up lever 5, the connecting rod assembly comprising the first connecting rod 2 and the second connecting rod 4 and the driving part 2 which is fixedly arranged, the first connecting rod 3 is connected with the driving part 2, and the second connecting rod 4 is hinged with the other end of the take-up lever 5; in the process that the driving piece 2 (the rotating motor in this embodiment) drives the thread take-up lever 5 to swing, when the first link 3 and the second link 4 are in the second state, i.e. the upper limit position in fig. 6, the thread passing hole 51 of the thread take-up lever 5 is at the highest point, then the first link 3 swings downwards to be in the first state with the second link 4, as shown in fig. 7, the thread passing hole 51 of the thread take-up lever 5 is at the lowest point, then the first link 3 moves reversely, and the above-mentioned steps are repeated. In this embodiment, the driving member 2 controls the swing angle and swing time of the first link 3, and further cooperates with the main shaft of the sewing machine to control the highest point time t1, the lowest point time t2 and the thread take-up stroke H of the thread passing hole on the thread take-up lever 5.
Namely, the driving piece 2 can drive the first connecting rod 3 to swing between the first state and the second state under the control of the controller, and can control the relative time sequence between the swinging time of the first connecting rod 3 and the rotation angle of the main shaft 10 of the sewing machine to be adjustable, namely, the thread taking-up time is changed when the stroke of the thread passing hole of the thread taking-up rod 5 is not changed, so that the advanced thread taking-up and the delayed thread taking-up are realized.
Second embodiment of thread take-up mechanism
The thread take-up mechanism of the embodiment has the same structure as the embodiment, and is different from the embodiment in that: see fig. 14 for the fixed position of the driving member 2. In the present embodiment, by adjusting the fixing position of the driving element 2, the link assembly can be formed into three states, wherein the first state (shown in fig. 15) and the second state (shown in fig. 16) are symmetrically located at two sides of the third state (shown in fig. 17), and the third state is a linear state (shown in fig. 17), the first state and the second state respectively enable the thread passing hole 51 of the thread take-up lever 5 to be at the highest point, and the third state enables the thread passing hole 51 of the thread take-up lever 5 to be at the lowest point. In the embodiment, on the basis of changing the thread taking-up time when the stroke of the thread passing hole of the thread taking-up rod 5 is unchanged so as to realize the advanced thread taking-up and the delayed thread taking-up, the connecting rod assembly can swing back and forth on two sides in a linear state through the position arrangement of the driving part 2, so that the thread passing hole 51 of the thread taking-up rod 5 can be positioned at the highest point twice when the driving part 2 rotates once, the rotation frequency of the driving part 2 is reduced, and if the driving part 2 is a rotating motor, the load of the driving part 2 can be reduced; if the driving member 2 is a driving magnet assembly, the swing efficiency can be improved.
Sewing material thickness detection assembly
As shown in fig. 5 and 11, the presser foot lifting mechanism of the sewing machine of the present embodiment includes: a presser bar 11; the presser bar 11 is arranged in a shaft sleeve 7 fixed on the machine shell in a penetrating way, the end part of the presser bar 11 is connected with the presser foot 8, a needle plate 9 is arranged below the presser foot 8, a feed dog 6 is arranged below the needle plate 9, and the sewing material passes through the space between the needle plate 9 and the presser foot 8, so the thickness of the sewing material influences the lifting height of the presser foot 8, namely the lifting height is related to the axial distance of the presser bar 11. In this embodiment, the real-time thickness of the sewing material can be fed back by detecting the axial movement distance of the presser foot rod 11.
In the present embodiment, the detection sensor 100 directly detects the movement of the presser foot lifting rod 11, as shown in fig. 11, the detection sensor 100 includes a detected member 101 disposed on the presser foot rod 11, and a fixedly disposed detection member 102, the detection member 102 is matched with the detected member 101 and is used for detecting the axial movement distance of the presser foot rod 11, the axial movement distance of the presser foot rod 11 is represented as the thickness of the sewing material, and the detection member 102 is connected to the controller.
A connecting seat 103 is fixed on the presser foot bar 11, the detected piece 101 is arranged on the connecting seat 103, and the detecting piece 102 is fixed on the casing and is close to the detected piece 101; the detecting member 102 and the detected member 101 may be a hall sensor and a magnet, respectively. When the detected member 101 moves up and down along with the presser bar 11, the detecting member 102 can monitor the height change of the detected member 101 in real time. In operation, when the sewing material is placed between the presser foot 8 and the needle plate 9, and the feed dog 6 starts to feed the cloth, as shown in fig. 12, the height h of the presser foot 8 changes along with the vertical movement of the feed dog 6, that is, the real-time height h of the presser foot 8 monitored by the detected object 101 is a variable, and the change curve of the height h of the presser foot 8 with respect to the time T is shown in fig. 13, so that the change of the height h of the presser foot 8 is detected in the embodiment, and the change is characterized as the thickness change of the sewing material.
As shown in fig. 13, where h0 is the thickness of the sewing material, h is the real-time height of the presser foot 8, hmax is the maximum value of h, and when the feed dog 6 is below the needle plate 9, h is h 0; when the feed dog 6 is above the needle plate 9, h changes along with the height change of the feed dog 6, so the height h of the presser foot 8 monitored in real time needs to be filtered, a part caused by the height change of the feed dog 6 is filtered, and the actual thickness h0 of the sewing material is identified.
In the embodiment, the compression spring 12 is arranged at the top of the presser foot rod 11, and the detection sensor 100 can be used for detecting the deformation amount of the compression spring 12, wherein the deformation amount of the compression spring 12 is represented as the thickness of the sewing material. In this embodiment, the presser bar 11 compresses the compression spring 12 during the presser foot lifting and the sewing material advancing, so that the real-time thickness of the sewing material can be detected by detecting the deformation amount of the compression spring 12.
The sewing material thickness detecting component is not limited to this, and it is only necessary to detect the sewing material thickness at the presser foot in real time, for example, it may be a sensor installed at the needle plate.
The invention also provides a method for automatically adjusting the take-up of the sewing machine, which can be realized by adopting the sewing machine, namely the method can comprise the sewing material thickness detection component and the take-up mechanism, and comprises the following steps:
presetting a sewing material thickness set in a controller, wherein the sewing material thickness set comprises a plurality of thickness sets, and the thickness interval in each thickness set is different;
the sewing material thickness detection component detects the thickness of the sewing material in real time and feeds the thickness back to the controller;
the controller judges which thickness set the current sewing material is in according to the received current sewing material thickness, and enables the driving piece to execute a normal sewing strategy, an advance line-winding sewing strategy or a delay line-winding strategy according to the current thickness set.
The invention adopts the sewing material thickness detection component to detect the thickness of the sewing material in real time, the controller knows whether the sewing material needs to be wound in advance or delayed in winding according to the current thickness set, and then drives the driving piece to execute a normal sewing strategy, an advance winding sewing strategy or a delayed winding strategy, and the winding strategy can be adjusted in real time according to the real-time thickness of the sewing material, so that the sewing effect is improved.
Specifically, in this embodiment, according to the specific size of the seam material thickness h0, the seam material may be divided into several thickness sets: [ h0 (1): h0(2) ], [ h0 (2): h0(3) ] … … [ h0 (n-1): h0(n) ]; each thickness set may be considered a bin. When the monitored h0 value falls in different gear intervals, as shown in fig. 8, the action time of the driving element 2 is automatically adjusted to enable the Z-direction displacement curve of the thread passing hole of the thread take-up lever to move left or right, namely the thread take-up time is advanced or delayed, different thickness sets correspond to different advanced or delayed phase differences, in fig. 8, a2 line represents a curve of the relation between the thread passing hole stroke and the angle of the sewing machine main shaft during normal sewing and corresponds to a thickness set (h0(k): h0(k +1)), a1 line represents a curve of the relation between the thread passing hole stroke and the angle of the sewing machine main shaft during delayed sewing and corresponds to a thickness set (h0(k +1): h0(k + 2)); a3 line represents the relationship curve between the thread hole stroke and the main shaft rotation angle of the sewing machine during advance sewing, which corresponds to the thickness set (h0(k-1): h0 (k)); and judging which thickness set the current sewing material is in aiming at the thickness value of the current sewing material, and accordingly obtaining which sewing strategy the current sewing material corresponds to, specifically a normal sewing strategy, an advance sewing strategy or a delay sewing strategy.
In this embodiment, the normal sewing strategy, the advanced sewing strategy or the delayed sewing strategy is implemented, which is mainly to match with the rotation angle of the main shaft of the sewing machine in the sewing machine and change the thread picking time by controlling the action time of the driving member 2, i.e. the advanced or delayed phase difference of the thread picking time is adjusted in real time according to the thickness of the sewing material, so as to optimize the thread take-up effect. Wherein, receive line in advance and make up the policy and do: the action time of the driving piece 2 is controlled to be ahead of the action time of the driving piece 2 in the normal sewing strategy by a certain time sequence; the delayed take-up sewing strategy is as follows: controlling the action time of the driving piece 2 to be delayed by a certain time sequence compared with the action time of the driving piece 2 in the normal sewing strategy; the specific regulation and control time sequence value can be set through the thickness set, namely different thickness values correspond to one time sequence value, namely one phase difference.
In summary, according to the sewing machine capable of automatically adjusting the take-up of the sewing material and the adjusting take-up method thereof, by the design of the sewing material thickness detection assembly and the take-up mechanism, the take-up time is changed when the stroke of the thread passing hole of the take-up lever is not changed, so that the take-up time is changed according to the sewing material thickness, and the take-up is adjusted. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (14)
1. The utility model provides a to sewing machine of line is received to thin automatic adjustment of seam material which characterized in that includes:
the sewing material thickness detection assembly is used for detecting the thickness of the sewing material and comprises a detection sensor;
the take-up mechanism comprises a take-up lever, a connecting rod assembly and a driving piece fixedly arranged, the take-up lever is a bending piece, the bending part is rotatably arranged, one end of the take-up lever is provided with a wire passing hole, one end of the connecting rod assembly is connected with the driving piece, the other end of the connecting rod assembly is connected with the other end of the take-up lever, and the driving piece drives the connecting rod assembly to swing in a reciprocating mode so that the wire passing hole of the take-up lever is located at the lowest point or the highest point;
the driving piece and the detection sensor are connected with the controller; the controller judges whether the line needs to be wound in advance or delayed according to the current sewing material thickness value fed back by the sewing material thickness detection assembly, so as to control the driving piece, and the driving piece can execute a normal sewing strategy, an advance line winding sewing strategy or a delayed line winding strategy.
2. The sewing machine for automatically adjusting take-up according to the thickness of a sewing material as claimed in claim 1, wherein: the driving piece drives the connecting rod assembly to swing in a reciprocating mode, the connecting rod assembly is in three states, the first state and the second state are symmetrically located on two sides of the third state, the third state is in a linear state, the first state and the second state enable the thread passing hole of the take-up lever to be located at the highest point, and the third state enables the thread passing hole of the take-up lever to be located at the lowest point.
3. The sewing machine for automatically adjusting take-up according to the thickness of a sewing material as claimed in claim 2, wherein: the driving piece drives the connecting rod assembly to swing in a reciprocating mode between two states, the first state enables the thread passing hole of the take-up lever to be located at the lowest point, and the second state enables the thread passing hole of the take-up lever to be located at the highest point.
4. The sewing machine of claim 2 or claim 3, wherein the automatic adjustment of take-up for seam material thickness comprises: the connecting rod assembly comprises a first connecting rod and a second connecting rod which are hinged, the first connecting rod is connected with the driving piece, and the second connecting rod is hinged with the other end of the take-up lever.
5. The sewing machine for automatically adjusting take-up according to the thickness of a sewing material as claimed in claim 1, wherein: the driving piece is a rotating motor.
6. The sewing machine of claim 5, wherein the sewing machine is capable of automatically adjusting the take-up for the thickness of the sewing material, and comprises: the swing angle of the connecting rod assembly can be adjusted by the rotating motor under the control of the controller, so that the stroke of the thread through hole of the take-up lever is changed.
7. The sewing machine of claim 5, wherein the sewing machine is capable of automatically adjusting the take-up for the thickness of the sewing material, and comprises: the rotating motor is in rotating fit with a main shaft of the sewing machine under the control of the controller, and the thread take-up time is changed when the stroke of the thread through hole of the thread take-up lever is unchanged.
8. The sewing machine for automatically adjusting take-up according to the thickness of a sewing material as claimed in claim 1, wherein: the detection sensor comprises a detected piece and a fixed detection piece, wherein the detected piece is arranged on the presser bar, the detection piece is matched with the detected piece and is used for detecting the axial movement distance of the presser bar, the axial movement distance of the presser bar is characterized by the thickness of the sewing material, and the detection piece is connected with the controller.
9. The sewing machine of claim 8, wherein the sewing machine is capable of automatically adjusting the take-up for the thickness of the sewing material, and comprises: the detected piece is installed on the presser bar through the fixed seat, and the detected piece is fixed on the shell of the sewing machine.
10. The sewing machine for automatically adjusting take-up according to the thickness of a sewing material as claimed in claim 1, wherein: the top of presser foot pole in the sewing machine is equipped with compression spring, detection sensor is used for detecting compression spring's deformation volume, compression spring's deformation volume sign is sewing material thickness.
11. An adjusting take-up method of a sewing machine is characterized by comprising the following steps:
presetting a sewing material thickness set in a controller, wherein the sewing material thickness set comprises a plurality of thickness sets, and the thickness interval in each thickness set is different;
the sewing material thickness detection component detects the thickness of the sewing material in real time and feeds the thickness back to the controller;
the controller judges which thickness set the current sewing material is in according to the received current sewing material thickness, and enables the driving piece to execute a normal sewing strategy, an advance line-winding sewing strategy or a delay line-winding strategy according to the current thickness set.
12. The method of adjusting take-up of a sewing machine of claim 11, wherein: the action time of the driving piece is controlled to be matched with the rotation angle of a main shaft of a sewing machine in the sewing machine, so that an early take-up sewing strategy or a delayed take-up strategy is realized.
13. The method of adjusting take-up of a sewing machine of claim 11, wherein: the sewing strategy of taking up in advance is as follows: controlling the action time of the driving piece to be earlier than the action time of the driving piece in the normal sewing strategy.
14. The method of adjusting take-up of a sewing machine of claim 11, wherein: the delay take-up strategy is as follows: controlling the action time of the driving piece to be delayed from the action time of the driving piece in the normal sewing strategy.
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| CN201811527329.8A CN109371586B (en) | 2018-12-13 | 2018-12-13 | Sewing machine capable of automatically adjusting take-up according to thickness of sewing material and take-up adjusting method thereof |
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| CN111979647B (en) * | 2019-05-23 | 2022-04-26 | 高林股份有限公司 | Sewing machine with automatic control mechanism and automatic control method thereof |
| CN110093722B (en) * | 2019-06-05 | 2021-03-12 | 杰克缝纫机股份有限公司 | Control method and control system for automatically switching sewing modes in sewing machine |
| CN112941750A (en) * | 2021-01-27 | 2021-06-11 | 马秀珍 | Thread feeding mechanism and embroidery machine |
| CN113026230A (en) * | 2021-03-19 | 2021-06-25 | 北京大豪工缝智控科技有限公司 | Sewing machine thread take-up device and sewing machine thread take-up control method |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |