CN215404937U - Sewing machine thread trimming, presser foot lifting and needle distance adjusting device and sewing machine - Google Patents
Sewing machine thread trimming, presser foot lifting and needle distance adjusting device and sewing machine Download PDFInfo
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- CN215404937U CN215404937U CN202121899586.1U CN202121899586U CN215404937U CN 215404937 U CN215404937 U CN 215404937U CN 202121899586 U CN202121899586 U CN 202121899586U CN 215404937 U CN215404937 U CN 215404937U
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Abstract
The utility model provides a thread trimming, presser foot lifting and needle distance adjusting device of a sewing machine and the sewing machine, the device comprises: the driving motor is provided with a motor shaft, and the driving motor drives the motor shaft to rotate when working; the wire cutting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the wire cutting transmission mechanism is connected with the wire cutting mechanism, and when the motor shaft rotates to a first angle interval, the wire cutting mechanism acts; the presser foot lifting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the presser foot lifting transmission mechanism is connected with the presser foot lifting mechanism, and the presser foot lifting mechanism acts when the motor shaft rotates to a second angle interval; and the needle pitch adjusting transmission mechanism is connected with the motor shaft and moves along with the motor shaft, the needle pitch adjusting transmission mechanism is connected with the needle pitch adjusting mechanism, and when the motor shaft rotates to a third angle interval, the needle pitch adjusting mechanism moves. The actions of trimming, lifting the presser foot and adjusting the needle pitch are independently completed by rotating a driving motor at different angles, so that the structure is simplified, the transmission efficiency is high, and the stability is good.
Description
Technical Field
The utility model relates to the technical field of sewing machine equipment, in particular to a thread trimming, presser foot lifting and needle distance adjusting device of a sewing machine and the sewing machine.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a fabric, thereby interweaving or stitching one or more layers of material. The sewing machine is generally composed of four parts, namely a feeding device, a base, a transmission and an accessory, and sewing materials are sewn through reasonable cooperation and circular work of the motion of each mechanism.
The sewing machine can use the functions of automatic thread trimming, automatic presser foot lifting and automatic needle distance adjustment in the sewing process. In the prior art, an electromagnet is adopted to lift a presser foot, an electromagnet drives a thread trimming crank to rotate by a thread trimming cam to complete thread trimming, and manual needle pitch adjustment and backstitch are performed, or a stepping motor is used for controlling needle pitch adjustment and backstitch. Because adopt the electro-magnet to realize the trimming and lift the presser foot, the noise is big, and the trimming effect is not good, and each part cooperation requirement is high, and manual needle pitch adjustment precision is not enough, and a single motor needle pitch adjustment is accurate but the cost is on the high side.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sewing machine thread cutting and presser foot lifting needle distance adjusting device and a sewing machine, and solves the problems that thread cutting and presser foot lifting are realized by adopting an electromagnet, the noise is high, the thread cutting effect is poor, the matching requirement of parts is high, the precision of manual needle distance adjustment is insufficient, and the needle distance adjustment by a single motor is accurate but the cost is high.
In order to achieve the above object, the present invention provides a thread trimming, presser foot lifting and needle distance adjusting device for a sewing machine, comprising:
the driving motor is provided with a motor shaft, and the driving motor drives the motor shaft to rotate when working;
the trimming transmission mechanism is connected with the trimming mechanism, and when the motor shaft rotates to a first angle interval, the trimming mechanism acts;
the pressure foot lifting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the pressure foot lifting transmission mechanism is connected with the pressure foot lifting mechanism, and when the motor shaft rotates to a second angle interval, the pressure foot lifting mechanism acts;
and the needle pitch adjusting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the needle pitch adjusting transmission mechanism is connected with the needle pitch adjusting mechanism, and when the motor shaft rotates to a third angle interval, the needle pitch adjusting mechanism acts.
Optionally, the trimming transmission mechanism includes a trimming cam, a trimming crank and a trimming transmission shaft, the trimming cam is sleeved on the motor shaft and rotates along with the motor shaft, one end of the trimming crank is detachably contacted with the trimming cam, the other end of the trimming crank is sleeved on the trimming transmission shaft, the trimming transmission shaft is connected with the trimming mechanism, and when the motor shaft rotates to a first angle interval, the trimming cam is contacted with one end of the trimming crank and drives the trimming crank and the trimming transmission shaft to rotate, so as to drive the trimming mechanism to move.
Optionally, the presser foot lifting transmission mechanism comprises a presser foot lifting cam, a presser foot lifting crank and a presser foot lifting transmission rod, the presser foot lifting cam is sleeved on the motor shaft and rotates along with the motor shaft, one end of the presser foot lifting crank is fixed, the other end of the presser foot lifting crank is in separable contact with the presser foot lifting cam, the presser foot lifting transmission rod is vertically arranged, the top end of the presser foot lifting transmission rod is connected with the presser foot lifting assembly, when the motor shaft rotates to a second angle interval, the presser foot lifting cam is in contact with one end of the presser foot lifting crank and drives the presser foot lifting crank to swing upwards, and the presser foot lifting crank is in contact with the bottom end of the presser foot lifting transmission rod and jacks the presser foot lifting transmission rod, so that the presser foot lifting mechanism is driven to act.
Optionally, the needle pitch adjusting transmission mechanism includes a needle pitch adjusting crank, a connecting rod and a swing arm, the needle pitch adjusting crank is sleeved on the motor shaft and rotates along with the motor shaft, one end of the connecting rod is connected with the needle pitch adjusting crank, the other end of the connecting rod is connected with the swing arm, and when the motor shaft rotates to a second angle interval, the needle pitch adjusting crank drives the swing arm to swing through the connecting rod, so as to drive the needle pitch adjusting mechanism to move.
Optionally, the thread trimming, presser foot lifting and needle distance adjusting device of the sewing machine further comprises a fixed seat, and the driving motor is mounted on the fixed seat.
Optionally, the fixing seat is fixed on a bottom plate of the sewing machine or integrally formed with the bottom plate.
Optionally, the driving motor can rotate forward and backward.
Optionally, the driving motor is a stepping motor or a servo motor.
Optionally, ranges of the first angle interval, the second angle interval, and the third angle interval are not coincident.
Based on the above, the utility model also provides a sewing machine, which comprises the thread cutting, presser foot lifting and needle distance adjusting device of the sewing machine.
In the thread cutting, presser foot lifting and needle distance adjusting device for the sewing machine and the sewing machine, actions of thread cutting, presser foot lifting and needle distance adjusting are independently completed respectively by rotating a driving motor at different angles, so that the structure is simplified, the cost is reduced, the transmission efficiency is high, the stability is good, and the noise can be greatly reduced.
Drawings
FIG. 1 is a schematic overall view of a thread trimming, presser foot lifting and needle distance adjusting device of a sewing machine according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a thread trimming, presser foot lifting and needle distance adjusting device of the sewing machine provided by the embodiment of the utility model;
3-4 are schematic structural diagrams of the thread trimming transmission mechanism provided by the embodiment of the utility model at different rotation angles;
fig. 5-6 are schematic structural views of the presser foot lifting transmission mechanism provided in the embodiment of the present invention at different rotation angles;
fig. 7-8 are schematic structural views of the pitch adjusting transmission mechanism provided in the embodiment of the present invention at different rotation angles;
FIG. 9 is a schematic diagram of three driving intervals divided by one rotation of the motor shaft according to an embodiment of the present invention;
fig. 10 is a schematic view of the working process of the thread cutting, presser foot lifting and stitch length adjusting device of the sewing machine according to the embodiment of the utility model.
In the drawings:
10-a drive motor; 20-a trimming transmission machine; 30-lifting presser foot transmission mechanism; 40-adjusting the needle pitch transmission mechanism; 50-a fixed seat;
100-motor shaft; 200-a trimming cam; 210-trimming crank; 220-trimming transmission shaft; 300-lifting the presser foot cam; 310-lifting a presser foot crank; 320-lifting a presser foot transmission rod; 400-adjusting the needle pitch crank; 410-a connecting rod; 420-swing arm; 510-trimming interval; 520-pressure foot lifting interval; 530-stitch adjustment interval.
Detailed Description
The core idea of the utility model is to provide a sewing machine thread trimming, presser foot lifting and needle distance adjusting device and a sewing machine, wherein the sewing machine thread trimming, presser foot lifting and needle distance adjusting device comprises: the driving motor is provided with a motor shaft, and the driving motor drives the motor shaft to rotate when working; the trimming transmission mechanism is connected with the trimming mechanism, and when the motor shaft rotates to a first angle interval, the trimming mechanism acts; the pressure foot lifting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the pressure foot lifting transmission mechanism is connected with the pressure foot lifting mechanism, and when the motor shaft rotates to a second angle interval, the pressure foot lifting mechanism acts; and the needle pitch adjusting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the needle pitch adjusting transmission mechanism is connected with the needle pitch adjusting mechanism, and when the motor shaft rotates to a third angle interval, the needle pitch adjusting mechanism acts. The actions of trimming, lifting the presser foot and adjusting the needle pitch are respectively and independently completed by rotating a driving motor at different angles, the structure is simplified, the cost is reduced, the transmission efficiency is high, the stability is good, and the noise can be greatly reduced.
To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of the features.
Referring to fig. 1-2, fig. 1 is an overall schematic view of a thread cutting, presser foot lifting and needle distance adjusting device of a sewing machine according to an embodiment of the present invention; fig. 2 is an enlarged view of a thread cutting, presser foot lifting and stitch length adjusting device of the sewing machine provided by the embodiment of the utility model. This embodiment provides a sewing machine trimming lifts presser foot roll adjustment needle apart from device, includes:
the driving motor 10 is provided with a motor shaft 100, and the driving motor 10 drives the motor shaft 100 to rotate when in operation;
the trimming transmission mechanism 20 is connected with the motor shaft 100 and acts along with the motor shaft 100, the trimming transmission mechanism 20 is connected with the trimming mechanism, and when the motor shaft 100 rotates to a first angle interval, the trimming mechanism acts;
the pressure foot lifting transmission mechanism 30 is connected with the motor shaft 100 and moves along with the motor shaft 100, the pressure foot lifting transmission mechanism 30 is connected with the pressure foot lifting mechanism, and when the motor shaft 100 rotates to a second angle interval, the pressure foot lifting mechanism moves;
and the needle pitch adjusting transmission mechanism 40 is connected with the motor shaft 100 and moves along with the motor shaft 100, the needle pitch adjusting transmission mechanism 40 is connected with the needle pitch adjusting mechanism, and when the motor shaft 100 rotates to a third angle interval, the needle pitch adjusting mechanism moves.
Specifically, the driving motor 10 is a stepping motor or a servo motor, so as to realize accurate control of the rotation angle of the motor shaft 100, and complete the functions of automatic trimming, automatic presser foot lifting and automatic needle pitch adjustment. In this embodiment, the driving motor 10 can rotate forward and backward, i.e. can rotate randomly in both forward and backward directions, and can realize the functions of trimming, lifting the presser foot and adjusting the needle pitch as long as the rotating angle is appropriate, regardless of the forward rotation or the backward rotation.
Referring to fig. 2, the thread trimming, presser foot lifting and stitch length adjusting device of the sewing machine further includes a fixing seat 50, and the driving motor 10 is mounted on the fixing seat 50. Of course, the driving motor 10 may be directly fixed to a bottom plate or an oil pan of the sewing machine, which is not limited in this application.
Preferably, the fixing seat 50 is fixed on a bottom plate of the sewing machine or integrally formed with the bottom plate, which is not limited in this application.
In this embodiment, the driving motor 10 has a motor shaft 100, and the driving motor 10 drives the motor shaft 100 to rotate when operating. Of course, the driving motor 10 may also be driven by a coupling or other parts, and this application is not limited in this respect.
Referring to fig. 3 to 4, fig. 3 to 4 are schematic structural views of the trimming transmission mechanism 20 according to the embodiment of the present invention at different rotation angles. The trimming transmission mechanism 20 includes a trimming cam 200, a trimming crank 210 and a trimming transmission shaft 220, the trimming cam 200 is sleeved on the motor shaft 100 and rotates along with the motor shaft 100, one end of the trimming crank 210 is detachably contacted with the trimming cam 200, the other end of the trimming crank is sleeved on the trimming transmission shaft 220, the trimming transmission shaft 220 is connected with the trimming mechanism, when the motor shaft 100 rotates to a first angle interval, the trimming cam 200 is contacted with one end of the trimming crank 210 and drives the trimming crank 210 and the trimming transmission shaft 220 to rotate, so as to drive the trimming mechanism to move.
Specifically, when the thread cutting transmission mechanism 20 is in the state shown in fig. 3, at this time, one end of the thread cutting crank 210 is separated from the thread cutting cam 200, and the thread cutting crank 210 and the thread cutting transmission shaft 220 do not rotate, so that the thread cutting mechanism does not operate. When the motor shaft 100 rotates counterclockwise to a first angle interval, for example, to a state shown in fig. 4, at this time, the protruding portion of the trimming cam 200 contacts with one end of the trimming crank 210, and along with the continuous rotation of the motor shaft 100, the protruding portion of the trimming cam 200 drives the trimming crank 210 and the trimming transmission shaft 220 to rotate, so as to drive the trimming mechanism to operate, thereby performing a trimming operation. After the thread trimming is finished, the motor shaft 100 rotates clockwise to drive the thread trimming cam 200 to rotate and reset, and the thread trimming crank 210 and the thread trimming transmission shaft 220 reset, so that an independent thread trimming action is finished. The thread trimming mechanism can be a structure capable of achieving thread trimming action in the prior art, and the thread trimming mechanism can be suitable for thread trimming mechanisms of various structural forms and has the advantage of wide application range.
Referring to fig. 5-6, fig. 5-6 are schematic structural views of the presser foot lifting transmission mechanism 30 provided in the embodiment of the present invention at different rotation angles. The presser foot lifting transmission mechanism 30 comprises a presser foot lifting cam 300, a presser foot lifting crank 310 and a presser foot lifting transmission rod 320, the presser foot lifting cam 300 is sleeved on the motor shaft 100 and rotates along with the motor shaft 100, one end of the presser foot lifting crank 310 is fixed, the other end of the presser foot lifting crank 310 is in separable contact with the presser foot lifting cam 300, the presser foot lifting transmission rod 320 is vertically arranged, the top end of the presser foot lifting transmission rod is connected with the presser foot lifting assembly, when the motor shaft 100 rotates to a second angle interval, the presser foot lifting cam 300 is in contact with one end of the presser foot lifting crank 310 and drives the presser foot lifting crank 310 to swing upwards, the presser foot lifting crank 310 is in contact with the bottom end of the presser foot lifting transmission rod 320 and jacks the presser foot lifting transmission rod 320, and then the presser foot lifting mechanism is driven to act.
Specifically, when the presser foot lifting transmission mechanism 30 is in the state shown in fig. 5, the presser foot lifting crank 310 and the presser foot lifting cam 300 are in the separated state, and the presser foot lifting crank 310 and the presser foot lifting transmission rod 320 do not rotate, so that the presser foot lifting mechanism does not operate. When the motor shaft 100 rotates clockwise to a second angle interval, for example, to a state shown in fig. 6, at this time, the protruding portion of the presser foot lifting cam 300 contacts with one end of the presser foot lifting crank 310, and as the motor shaft 100 continues to rotate clockwise, the protruding portion of the presser foot lifting cam 300 drives the presser foot lifting crank 310 to swing upward and jack up the presser foot lifting transmission rod 320, so as to drive the presser foot lifting mechanism to operate, thereby performing a presser foot lifting operation. When the motor shaft 100 rotates counterclockwise by a certain angle, the presser foot lifting cam 300 resets, the presser foot lifting crank 310 and the presser foot lifting transmission rod 320 reset, and the presser foot descends, so that one presser foot lifting action is independently completed. The presser foot lifting mechanism can be a structure capable of realizing the action of lifting the presser foot in the prior art, and the embodiment can be suitable for the presser foot lifting mechanisms with various structural forms and has the advantage of wide application range.
Referring to fig. 7-8, fig. 7-8 are schematic structural views of the pitch adjustment transmission mechanism 40 according to the embodiment of the present invention at different rotation angles. The needle pitch adjusting transmission mechanism 40 includes a needle pitch adjusting crank 400, a connecting rod 410 and a swing arm 420, the needle pitch adjusting crank 400 is sleeved on the motor shaft 100 and rotates along with the motor shaft 100, one end of the connecting rod 410 is connected with the needle pitch adjusting crank 400, the other end of the connecting rod 410 is connected with the swing arm 420, and when the motor shaft 100 rotates to a second angle interval, the needle pitch adjusting crank 400 drives the swing arm 420 to swing through the connecting rod 410, so as to drive the needle pitch adjusting mechanism to move.
Specifically, when the motor shaft 100 rotates forward or backward, the needle pitch adjusting crank 400 is driven to rotate by a certain angle to drive the connecting rod 410 to make the swing arm 420 swing, so as to realize the functions of adjusting the needle pitch and switching the backward and forward sewing. The needle pitch adjusting mechanism can be a structure capable of realizing needle pitch adjusting action in the prior art, and the needle pitch adjusting mechanism can be suitable for various structural forms and has the advantage of wide application range.
The thread cutting transmission mechanism 20, the presser foot lifting transmission mechanism 30 and the needle pitch adjusting transmission mechanism 40 are respectively driven by the driving motor 10 to drive the motor 10 to rotate by different angles through one driving motor 10, the actions of thread cutting, presser foot lifting and needle pitch adjusting are independently completed, the structure is simplified, the cost is reduced, the transmission efficiency is high, the stability is good, and the noise can be greatly reduced.
In this embodiment, the driving motor 10 may be connected to a controller (not shown in the figure), and the controller controls the driving motor 10 to start or stop rotating according to the work requirement of the sewing machine, and controls the rotating direction and the rotating angle of the driving motor 10, thereby realizing the precise control of the thread cutting action, the presser foot lifting action and the needle pitch adjusting action. The controller can be a main controller of the existing sewing machine, such as a PLC controller or a singlechip.
The ranges of the first angle interval, the second angle interval and the third angle interval are not coincident. Specifically, referring to fig. 9, fig. 9 is a schematic diagram of three driving intervals divided by one rotation of the motor shaft 100 according to the embodiment of the present invention. In this embodiment, a circle of rotation of the motor shaft 100 of the driving motor 10 is divided into three driving sections, which are a trimming section 510, a presser foot lifting section 520 and a needle pitch adjusting section 530, and correspond to the first angle section, the second angle section and the third angle section, respectively, and when the motor shaft 100 rotates to different driving sections, corresponding trimming, presser foot lifting and needle pitch adjusting actions are completed. Of course, there is a blank interval, and when the motor shaft 100 rotates to the blank interval, the thread trimming mechanism, the presser foot lifting mechanism and the stitch length adjusting mechanism do not operate.
Based on the thread trimming, presser foot lifting and needle distance adjusting device of the sewing machine, the utility model also provides the sewing machine, which comprises the thread trimming, presser foot lifting and needle distance adjusting device of the sewing machine.
Referring to fig. 10, fig. 10 is a schematic view of a working process of the device for adjusting the needle distance by lifting and pressing the thread trimming foot of the sewing machine according to the embodiment of the present invention. The utility model also provides a method for adjusting the needle pitch of the thread trimming, presser foot lifting and sewing machine, which comprises the following steps:
step S1, starting the sewing machine;
step S2, the controller controls the motor shaft 100 of the driving motor 10 to rotate and reset to the initial position, and in the initial position, the device is in the default parameter state set by the controller: the motor shaft 100 is located at a default angle within the stitch length adjusting range 530;
and step S3, judging whether the stitch length is adjusted, namely judging whether the default stitch length needs to be adjusted to obtain the required initial stitch length value. If the needle pitch needs to be adjusted, a needle pitch adjusting signal can be manually input from a control panel of the sewing machine, the controller transmits the needle pitch adjusting signal to the driving motor 10, the controller controls the motor shaft 100 of the driving motor 10 to rotate in the needle pitch adjusting interval 530 according to the needle pitch adjusting signal, so that the needle pitch adjusting crank 400 drives the swing arm 420 to perform swing motion through the connecting rod 410, further drives the needle pitch adjusting mechanism to perform needle pitch adjusting motion, when the needle pitch is adjusted to a required initial needle pitch value within a (-N, + N) needle pitch range, namely parameter requirements of the needle pitch adjusting signal are met, the controller controls the motor shaft 100 of the driving motor 10 to stop rotating, the needle pitch adjustment is completed, and then the next step S4 is performed. In the needle pitch adjusting process, the thread trimming cam 200 lifts the presser foot cam 300 to execute an idle stroke, the thread trimming mechanism and the presser foot lifting mechanism do not act, and if the needle pitch adjusting is not needed, the next step S4 is directly carried out;
step S4, the sewing machine starts the sewing work until the sewing is finished.
And step S5, after the sewing is finished, judging whether to cut the thread. If the thread cutting is required, the controller can control the motor shaft 100 of the driving motor 10 to rotate counterclockwise from the stitch length adjusting section 530 to the thread cutting section 510. The trimming cam 200 rotates and drives the trimming crank 210 and the trimming transmission shaft 220 to rotate, so as to drive the trimming mechanism to operate, thereby performing the trimming operation, and if the trimming is not required, the next step S6 is directly performed.
And step S6, judging whether the presser foot is lifted. If the presser foot is required to be lifted, a controller can transmit a presser foot lifting signal to the driving motor 10, the controller controls the motor shaft 100 of the driving motor 10 to rotate to a presser foot lifting interval 520 according to the presser foot lifting signal, and the presser foot lifting cam 300 drives the presser foot lifting crank 310 to swing upwards and jack up the presser foot lifting transmission rod 320, so as to drive the presser foot lifting mechanism to act, thereby executing the presser foot lifting action. Specifically, the presser foot lifting action is divided into two situations: the presser foot is lifted under the condition of not executing the thread trimming action and the presser foot is lifted after the thread trimming action is finished.
If the presser foot needs to be lifted without performing a thread trimming operation, the motor shaft 100 of the driving motor 10 is controlled by the controller to rotate clockwise from the stitch adjusting interval 530 to enter the presser foot lifting interval 520, the presser foot lifting cam 300 drives the presser foot lifting crank 310 to swing upwards and jack up the presser foot lifting transmission rod 320, so as to drive the presser foot lifting mechanism to operate, thereby performing the presser foot lifting operation, until the presser foot is lifted to a required height, the controller controls the motor shaft 100 of the driving motor 10 to stop rotating, the presser foot lifting operation is completed, and then related operations can be performed manually. In this process, the thread trimming mechanism is not actuated. After the manual operation is completed, the controller controls the motor shaft 100 of the driving motor 10 to rotate counterclockwise, the presser foot lifting interval 520 returns to the needle pitch adjusting interval 530, the presser foot lifting cam 300 resets, the presser foot lifting crank 310 and the presser foot lifting transmission rod 320 reset, the presser foot descends, one presser foot lifting action is independently completed, and then the next step S7 is performed.
If the presser foot needs to be lifted after the thread trimming action is finished, the motor shaft 100 of the driving motor 10 is controlled by the controller to continue rotating anticlockwise, the thread trimming section 510 enters the presser foot lifting section 520, the presser foot lifting action is executed, the motor shaft 100 of the driving motor 10 is controlled by the controller to stop rotating until the presser foot is lifted to a required height, the presser foot lifting action is finished, and then relevant operations (such as cloth taking out) can be carried out manually. After the manual operation is completed, the controller controls the motor shaft 100 of the driving motor 10 to rotate counterclockwise continuously, and returns to the needle pitch adjusting section 530 from the second presser foot lifting section 520, the presser foot lifting cam 300 is reset, the presser foot lifting crank 310 and the presser foot lifting transmission rod 320 are reset, the presser foot descends, and then the next step S7 is performed.
If the presser foot does not need to be lifted, the process proceeds to the next step S7.
Step S7, the sewing is continued or the controller controls the motor shaft 100 of the driving motor 10 to reverse back to the original gauge value. If the thread cutting operation and the presser foot lifting operation are not performed before step S7, the sewing is continued, and the process proceeds to the next step S8. If the presser foot raising operation is performed before step S7, the process proceeds directly to the next step S8. If the thread trimming operation is performed and the presser foot lifting operation is not performed before step S7, the controller controls the motor shaft 100 of the driving motor 10 to rotate clockwise in step S7, and the thread trimming section 510 is reversed to return to the pitch adjusting section 530, and after the pitch is adjusted to a desired pitch value, the controller controls the motor shaft 100 of the driving motor 10 to stop rotating, and the process proceeds to the next step S8.
And step S8, judging whether to continue sewing, if so, returning to step S3, and if not, entering the next step S9.
And step S9, ending sewing.
In summary, the embodiment of the present invention provides a device for adjusting needle distance by lifting and pressing a thread trimming and a needle pressing of a sewing machine and a sewing machine, wherein the device for adjusting needle distance by lifting and pressing a thread trimming and a needle pressing of a sewing machine comprises: the driving motor is provided with a motor shaft, and the driving motor drives the motor shaft to rotate when working; the trimming transmission mechanism is connected with the trimming mechanism, and when the motor shaft rotates to a first angle interval, the trimming mechanism acts; the pressure foot lifting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the pressure foot lifting transmission mechanism is connected with the pressure foot lifting mechanism, and when the motor shaft rotates to a second angle interval, the pressure foot lifting mechanism acts; and the needle pitch adjusting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the needle pitch adjusting transmission mechanism is connected with the needle pitch adjusting mechanism, and when the motor shaft rotates to a third angle interval, the needle pitch adjusting mechanism acts. The actions of trimming, lifting the presser foot and adjusting the needle pitch are respectively and independently completed by rotating a driving motor at different angles, the structure is simplified, the cost is reduced, the transmission efficiency is high, the stability is good, and the noise can be greatly reduced.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. The utility model provides a sewing machine trimming lifts presser foot and adjusts stitch length device which characterized in that includes:
the driving motor is provided with a motor shaft, and the driving motor drives the motor shaft to rotate when working;
the trimming transmission mechanism is connected with the trimming mechanism, and when the motor shaft rotates to a first angle interval, the trimming mechanism acts;
the pressure foot lifting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the pressure foot lifting transmission mechanism is connected with the pressure foot lifting mechanism, and when the motor shaft rotates to a second angle interval, the pressure foot lifting mechanism acts;
and the needle pitch adjusting transmission mechanism is connected with the motor shaft and acts along with the motor shaft, the needle pitch adjusting transmission mechanism is connected with the needle pitch adjusting mechanism, and when the motor shaft rotates to a third angle interval, the needle pitch adjusting mechanism acts.
2. The device for adjusting the needle distance of the thread lifting and pressing foot of the sewing machine as claimed in claim 1, wherein the thread cutting transmission mechanism comprises a thread cutting cam, a thread cutting crank and a thread cutting transmission shaft, the thread cutting cam is sleeved on the motor shaft and rotates along with the motor shaft, one end of the thread cutting crank is detachably contacted with the thread cutting cam, the other end of the thread cutting crank is sleeved on the thread cutting transmission shaft, the thread cutting transmission shaft is connected with the thread cutting mechanism, when the motor shaft rotates to a first angle interval, the thread cutting cam is contacted with one end of the thread cutting crank and drives the thread cutting crank and the thread cutting transmission shaft to rotate, and then the thread cutting mechanism is driven to act.
3. The device for adjusting the needle distance of the thread trimming pressure foot of the sewing machine as claimed in claim 1, wherein the pressure foot lifting transmission mechanism comprises a pressure foot lifting cam, a pressure foot lifting crank and a pressure foot lifting transmission rod, the pressure foot lifting cam is sleeved on the motor shaft and rotates along with the motor shaft, one end of the pressure foot lifting crank is fixed, the other end of the pressure foot lifting crank is detachably contacted with the pressure foot lifting cam, the pressure foot lifting transmission rod is vertically arranged, the top end of the pressure foot lifting transmission rod is connected with the pressure foot lifting assembly, when the motor shaft rotates to a second angle interval, the pressure foot lifting cam is contacted with one end of the pressure foot lifting crank and drives the pressure foot lifting crank to swing upwards, and the pressure foot lifting crank is contacted with the bottom end of the pressure foot lifting transmission rod and jacks up the pressure foot lifting transmission rod, so as to drive the pressure foot lifting mechanism to act.
4. The device as claimed in claim 3, wherein the stitch length adjusting transmission mechanism comprises a stitch length adjusting crank, a connecting rod and a swing arm, the stitch length adjusting crank is sleeved on the motor shaft and rotates along with the motor shaft, one end of the connecting rod is connected with the stitch length adjusting crank, the other end of the connecting rod is connected with the swing arm, when the motor shaft rotates to a second angle range, the stitch length adjusting crank drives the swing arm to perform a swing motion through the connecting rod, and further drives the stitch length adjusting mechanism to operate.
5. The device of claim 1 wherein said device further comprises a mounting base, said drive motor being mounted to said mounting base.
6. The device for adjusting the stitch length of the thread trimming lifting and pressing foot of the sewing machine as claimed in claim 5, wherein said fixing base is fixed to the bed plate of the sewing machine or is formed integrally with the bed plate.
7. The device for adjusting the stitch length of a thread trimming presser foot of a sewing machine as claimed in claim 1, wherein said drive motor is capable of rotating in forward and reverse directions.
8. The device for adjusting the needle distance of the thread trimming, presser foot and needle of the sewing machine as claimed in claim 1, wherein said driving motor is a stepping motor or a servo motor.
9. The sewing machine thread trimming pressure foot distance adjusting device as claimed in claim 1, wherein the ranges of the first angle interval, the second angle interval and the third angle interval do not coincide.
10. A sewing machine comprising the thread trimming, presser foot lifting and stitch length adjusting device of the sewing machine according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899586.1U CN215404937U (en) | 2021-08-10 | 2021-08-10 | Sewing machine thread trimming, presser foot lifting and needle distance adjusting device and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899586.1U CN215404937U (en) | 2021-08-10 | 2021-08-10 | Sewing machine thread trimming, presser foot lifting and needle distance adjusting device and sewing machine |
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| Publication Number | Publication Date |
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| CN215404937U true CN215404937U (en) | 2022-01-04 |
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| CN202121899586.1U Active CN215404937U (en) | 2021-08-10 | 2021-08-10 | Sewing machine thread trimming, presser foot lifting and needle distance adjusting device and sewing machine |
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| CN (1) | CN215404937U (en) |
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