WO2021227264A1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
WO2021227264A1
WO2021227264A1 PCT/CN2020/107003 CN2020107003W WO2021227264A1 WO 2021227264 A1 WO2021227264 A1 WO 2021227264A1 CN 2020107003 W CN2020107003 W CN 2020107003W WO 2021227264 A1 WO2021227264 A1 WO 2021227264A1
Authority
WO
WIPO (PCT)
Prior art keywords
presser foot
driving
clutch assembly
thread
sewing machine
Prior art date
Application number
PCT/CN2020/107003
Other languages
French (fr)
Chinese (zh)
Inventor
管建平
谭新民
洪志敏
许君辉
Original Assignee
杰克缝纫机股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杰克缝纫机股份有限公司 filed Critical 杰克缝纫机股份有限公司
Publication of WO2021227264A1 publication Critical patent/WO2021227264A1/en

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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/02Presser-control devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B47/00Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04Automatically-controlled tensioning devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/02Mechanical drives
    • D05B69/04Manual drives
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B69/00Driving-gear; Control devices
    • D05B69/10Electrical or electromagnetic drives

Definitions

  • the invention relates to a sewing machine.
  • the movement stroke of the electromagnet core is a fixed value, and the electromagnet can only lift the presser foot to the highest point at one time, but cannot lift the presser foot up to the highest point.
  • the height of the presser foot is not adjustable; and, due to the movement nature of the electromagnet, there will be a greater impulse during the presser foot lifting process, and it is difficult to control the buffer when the presser foot is lowered, so when the presser foot is raised and lowered
  • the impact force is relatively large, which in turn produces relatively large noise and vibration.
  • the sewing machine is also provided with a thread clamp.
  • the thread clamp is an electronic thread clamp and the drive source is also an electromagnet.
  • the thread clamp clamps the thread during sewing and gives a certain thread tension to the upper thread.
  • the thread clamp is used for trimming. Loosen the thread so that a longer upper thread end can be obtained on the needle side, thereby preventing the upper thread from escaping from the needle. Therefore, the sewing machine is equipped with at least two electromagnets for performing presser foot lifting, thread clamping and thread loosening, respectively, which increases the cost of the sewing machine and makes the sewing machine bulky.
  • the thread clamp is also equipped with an adjusting knob, which acts on the thread clamp spring in the thread clamp.
  • the user manually rotates the adjusting knob to adjust the spring force of the thread clamp spring, thereby adjusting the thread clamp applied to the upper thread.
  • the tension of the thread that is, adjust the thread tension. Therefore, the thread clamping force of the thread clamp in the existing sewing machine is manually adjusted, which is time-consuming and labor-intensive.
  • the purpose of the present invention is to provide a sewing machine that can both automatically lift the presser foot and manually lift the presser foot.
  • the present invention provides a sewing machine, including a presser foot assembly, the presser foot assembly includes a press bar that can move up and down, a presser foot installed at the lower end of the press bar, and a guide frame fixed on the press bar
  • the sewing machine further includes a driving source, a driving crank driven to rotate by the driving source, an automatic presser foot clutch assembly connected between the driving crank and the guide frame, a hand-held wrench located outside the sewing machine casing, and a hand-held wrench and
  • the manual presser foot lifting clutch assembly between the guide frames; when the automatic presser foot lifting clutch assembly enables power transmission between the driving crank and the guide frame, the manual presser foot lifting clutch assembly makes the hand spanner and the guide frame No power transmission; when the manual presser foot lifting clutch assembly causes power transmission between the hand wrench and the guide frame, the automatic presser foot lifting clutch assembly causes no power transmission between the drive crank and the guide frame.
  • the sewing machine further includes a thread clamp and a thread tension adjustment clutch assembly;
  • the thread clamp includes an axially movable thread clamp rod, a thread clamp piece and a thread clamp spring sleeved on the thread clamp rod, and a set A spring stopper on the wire clamping lever, the two ends of the wire clamping spring abut the wire clamping piece and the spring stopper;
  • the tension adjustment clutch assembly is connected between the drive crank and the wire clamping lever;
  • the driving source is a driving motor, and the output angle of the driving motor has a presser foot lifting range and a wire tension adjustment range; when the motor shaft of the driving motor rotates within the presser foot lifting range, the automatic presser foot lifting clutch The assembly enables power transmission between the drive crank and the guide frame, and the wire tension adjustment clutch assembly causes no power transmission between the drive crank and the wire clamping lever; when the motor shaft of the drive motor rotates within the online tension adjustment range, all The automatic presser foot lifting clutch assembly enables no power transmission between the driving crank and the guide frame, and
  • the thread clamp is in a thread-releasing state.
  • the automatic presser foot lifting clutch assembly includes a presser foot lifting link, a presser foot lifting rocker having a first fixed swing fulcrum, and a presser foot lifting push rod fixed to the presser foot lifting link.
  • the two ends of the foot connecting rod are respectively hinged with the driving crank and the presser foot lifting rocker, and the hinge point of the presser foot lifting connecting rod and the driving crank is eccentric to the rotation center of the driving crank; when the motor shaft of the driving motor is lifting the presser foot When rotating within the range, the presser foot lifting push rod abuts and cooperates with the guide frame; when the manual presser foot lifting clutch assembly enables power transmission between the hand spanner and the guide frame, or the motor shaft of the drive motor is online When rotating within the tension adjustment range, the presser foot lifting push rod is located below the guide frame and the two are separated.
  • the wire tension adjusting clutch assembly includes a roller mounted on a driving crank, a driving lever having a second fixed swing fulcrum, and a connecting joint fixed on the wire clamping rod, and one end of the driving lever has a lever driving part , The other end is provided with a sliding groove extending along the length of the driving lever, the connecting joint has a connecting shaft part, the connecting shaft part is inserted in the sliding groove, and the two slidingly cooperate; when the motor shaft of the driving motor When rotating within the range of lifting the presser foot, the lever driving part of the driving lever is separated from the roller; when the motor shaft of the driving motor rotates within the online tension adjustment range, the lever driving part of the driving lever abuts against the roller Cooperate.
  • the thread clamp further includes a thread clamp seat fixed to the housing of the sewing machine, the thread clamp rod is movably inserted in the thread clamp seat, and the thread clamp has two and two thread clamps.
  • a wire clamping cavity is formed between the pieces, one of the wire clamping pieces abuts the wire clamping seat, and the other wire clamping piece abuts the wire clamping spring.
  • the spring limiting member is a knob, and the knob and the wire clamping rod are in a separate structure, and the wire clamping rod is fixedly connected or threaded to the knob.
  • the spring limiting member is a brim portion, and the brim portion is integrally formed on the wire clamping rod.
  • the manual presser foot lifting clutch assembly includes a portable crank and a portable connecting rod rotatably installed in the housing of the sewing machine; the portable crank is fixedly connected with the portable wrench; a connecting screw is fixed on the portable crank, One end of the portable link is provided with a connecting chute extending along the extending direction of the portable link, the connecting screw is inserted in the connecting chute, and the two are rotatably matched; the other end of the portable link is connected to the guide frame
  • the connecting screw slides in the connecting chute; when the manual presser foot lifting clutch assembly makes the hand spanner and the guide frame When there is power transmission between, the connecting screw abuts against the end of the connecting chute.
  • the manual presser foot lifting clutch assembly further includes a limit pin fixed to the sewing machine casing, and the hand crank is provided with an upward lifting limit surface and a downward pressing limit surface, and the limit pin is located on the upper lift Between the limit surface and the lower pressure limit surface; when the limit pin is in contact with the upper limit surface, the presser foot is in the state of the presser foot; When abutting, the presser foot is in a pressed state.
  • the sewing machine related to the present invention has the following beneficial effects:
  • the presser foot can be driven to move up through the drive source, the drive crank and the automatic presser foot lifting clutch assembly to realize automatic presser foot lifting; the presser foot can also be driven to move up by the portable wrench and the manual presser foot lifting clutch assembly to realize manual Lift the presser foot. Therefore, the sewing machine involved in the present application can both automatically lift the presser foot and manually lift the presser foot, thereby improving the convenience of operation and improving the use performance of the sewing machine.
  • Figure 1 is a schematic diagram of the structure of the sewing machine in this application.
  • Figure 2 is a schematic diagram of the connection between the presser foot lifting assembly, drive source, drive crank, automatic presser foot lifting clutch assembly, hand spanner, manual presser foot lifting clutch assembly, thread clamp, and thread tension adjustment clutch assembly in this application.
  • Figure 3 is a schematic diagram of the connection between the presser foot lifting assembly, the hand-held wrench and the manual presser foot lifting clutch assembly in this application.
  • FIG. 4 is a schematic diagram of the connection between the presser foot lifting assembly, the driving source, the driving crank and the automatic presser foot lifting clutch assembly in this application.
  • Figure 5 is a schematic diagram of the connection between the drive source, the drive crank, the thread clamp, and the thread tension adjustment clutch assembly in this application.
  • Figure 6 is a schematic diagram of the connection between the drive crank, the thread clamp, and the thread tension adjustment clutch assembly in this application.
  • FIGS 7 to 9 are process diagrams of the sewing machine manually lifting the presser foot in this application.
  • each direction is as follows: the axial direction of the main shaft of the sewing machine is defined as the left and right direction, and the direction of the main shaft facing the sewing machine head (ie, the needle side) is the left direction, and the main shaft faces the sewing machine.
  • the direction of the tail is the right direction; the movement direction of the sewing material when the sewing machine is sewing is defined as the front direction; the direction orthogonal to both the left and right directions and the front and rear directions is defined as the up and down direction.
  • the sewing machine involved in the present application includes a housing 10, a presser foot lifting assembly 20, a drive source, a drive crank 50, an automatic presser foot lifting clutch assembly 60, a hand spanner 80, and a manual presser foot lifting clutch Component 90.
  • the presser foot lifting assembly 20 includes a presser bar 21 extending up and down, a presser foot 22 installed at the lower end of the presser bar 21, and a guide frame 23 fixed at the upper end of the presser bar 21.
  • the presser bar 21 is mounted on the sewing machine housing so as to move up and down. 10 in.
  • the driving source is installed in the sewing machine housing 10, and the output end of the driving source is connected with the driving crank 50 to drive the driving crank 50 to rotate.
  • the automatic presser foot lifting clutch assembly 60 is connected between the driving crank 50 and the guide frame 23.
  • the portable wrench 80 is arranged on the outside of the sewing machine casing 10 and located on the front side of the sewing machine casing 10, and the manual presser foot lifting clutch assembly 90 is connected between the portable wrench 80 and the guide frame 23.
  • the hand spanner 80 drives the guide frame 23 upward through the manual presser foot clutch assembly 90, and the guide frame 23 drives the pressure rod 21 and the presser foot 22 to move upward together , Realize the manual presser foot lifting process; and, in the process of manual presser foot lifting, the automatic presser foot clutch assembly 60 causes no power transmission between the driving crank 50 and the guide frame 23, so the upward movement of the guide frame 23 will not be automatically lifted and pressed
  • the foot clutch assembly 60 acts on the drive crank 50 and the drive source, and the drive crank 50 and the drive source maintain their current positions respectively. Therefore, the sewing machine involved in the present application can both automatically lift the presser foot and manually lift the presser foot.
  • the manual presser foot lifting operation is not limited by whether the sewing machine is powered on or not. It can be powered on and when the sewing machine is powered off. Perform manual presser foot lifting action, thereby improving the convenience of operation and improving the performance of the sewing machine.
  • the sewing machine further includes a thread clamp 30 and a thread tension adjustment clutch assembly 70.
  • the thread clamp 30 includes a thread clamp rod 31 extending back and forth, a thread clamp piece 32 and a thread spring 33 sleeved on the thread clamp rod 31, and a spring limiter 34 arranged at the rear end of the thread clamp rod 31, the thread clamp rod 31 is installed in the sewing machine housing 10 so that it can move back and forth.
  • the thread clamping spring 33 extends forward and backward.
  • the wire spring 33 and the spring limiter 34 are distributed in sequence from front to back.
  • the tension adjusting clutch assembly is connected between the driving crank 50 and the wire clamping rod 31.
  • the driving source is a driving motor 40, and the motor shaft of the driving motor 40 is connected with the driving crank 50 to drive the driving crank 50 to rotate.
  • the output rotation angle of the driving motor 40 has a presser foot lifting range and a wire tension adjustment range, and the wire tension adjustment range includes a rotation angle value corresponding to a wire tension of zero.
  • the automatic presser foot clutch assembly 60 When the motor shaft of the drive motor 40 rotates within the presser foot lifting range, the automatic presser foot clutch assembly 60 enables power transmission between the drive crank 50 and the guide frame 23, and the thread tension adjustment clutch assembly 70 drives the drive crank 50 and the thread clamping There is no power transmission between the rods 31; at this time, when the drive motor 40 drives the drive crank 50 to rotate, the automatic presser foot clutch assembly 60 drives the pressing rod 21 to move up, and the pressing rod 21 drives the presser foot 22 to move up together to perform automatic lifting.
  • the presser foot moves, but the thread clamp 30 does not work and maintains the current state; and the output angle of the drive motor 40 is controllable, so that the stroke of the pressing rod 21 is also controllable, so that the presser foot 22 is lifted when the presser foot is automatically lifted
  • the lifting height is also controllable, and the presser foot 22 can be lifted up to any height below the highest point.
  • the automatic presser foot clutch assembly 60 causes no power transmission between the drive crank 50 and the guide frame 23, and the wire tension adjustment clutch assembly 70 drives the crank 50 and the thread clamping lever There is power transmission between 31; at this time, when the drive motor 40 drives the drive crank 50 to rotate, the wire tension adjustment clutch assembly 70 drives the wire clamping lever 31 to move forward or backward; the wire clamping lever 31 drives the spring limiter 34 to move forward At this time, the length of the thread clamping spring 33 decreases, and the pressure of the thread clamping spring 33 on the thread clamping piece 32 increases, so that the thread clamp 30 can perform the thread clamping action or increase the amount of the thread clamp 30 applied to the upper thread.
  • Thread clamping force that is, increase the thread tension of the upper thread
  • the thread clamping lever 31 drives the spring limiter 34 to move backward
  • the length of the thread clamping spring 33 increases, and the pressure of the thread clamping spring 33 on the thread clamping piece 32 decreases Therefore
  • the thread clamp 30 can perform the thread loosening action, or reduce the thread clamping force applied by the thread clamp 30 to the upper thread, that is, reduce the thread tension of the upper thread; when the thread tension spring 33 is fully restored to its original length At this time, the thread clamping force applied by the thread clamping piece 32 to the upper thread is zero; and the presser foot assembly 20 does not move, and the presser foot 22 maintains the current state.
  • the sewing machine involved in the present application also realizes the use of the same drive motor 40 to automatically lift the presser foot and automatically adjust the thread tension, including the execution clamp when automatically adjusting the thread tension.
  • the thread clamping action and the thread loosening action of the threader 30 can lift the presser foot 22 up to any height below the highest point when the presser foot is automatically lifted, and the drive motor 40 will not generate impact during operation. Therefore, the present application can reduce the cost of the sewing machine, optimize the structure of the sewing machine, and reduce the noise and pressure foot when the presser foot 22 is raised and lowered, when the thread tension is adjusted, when the thread clamp 30 is clamping the thread, and the thread clamp 30 is loosening the thread. 22
  • the lifting height is controllable.
  • the pressing rod 21 can be moved up and down through a bushing 24 which is fixed in the casing 10, and the needle plate of the sewing machine is under the pressing foot 22.
  • the driving motor 40 is a stepping motor, which can improve the control accuracy.
  • the driving motor 40 is fixedly installed on a motor base 110, and the motor base 110 is fixedly installed on the casing 10 by screws, and then the driving motor 40 is installed on the casing 10.
  • a shaft sleeve 120 is also fixed on the left side of the motor base 110.
  • the motor shaft of the drive motor 40 extends left and right and is rotatably supported in the shaft sleeve 120.
  • the drive crank 50 is fixed on the left end of the motor shaft of the drive motor 40.
  • the driving motor 40 directly drives the driving crank 50 to rotate.
  • the upper end of the pressure rod 21 is sleeved with a pressure foot 22 spring, which presses down the pressure rod 21, so that the pressure foot 22 has a downward force, so that the pressure foot 22 can move the cloth toward The pressure on the needle plate.
  • the thread clamp 30 is in a loose thread state. At this time, the thread clamp spring 33 in the thread clamp 30 is completely restored to its original length. The thread tension is zero.
  • the automatic presser foot lifting clutch assembly 60 includes a presser foot lifting link 61, a presser foot lifting rocker 62 having a first fixed swing fulcrum, and a presser foot lifting rocker 62 fixed at The presser foot push rod 63 of the presser foot lift link 61; the upper end of the presser foot link 61 is hinged on the left end surface of the driving crank 50 by an axial screw extending left and right, and the presser foot lift link 61 and the driving crank 50 The hinge point is eccentric to the center of rotation of the driving crank 50.
  • the center of rotation of the driving crank 50 is the center of rotation of the motor shaft of the driving motor 40;
  • the extended axis screw is hinged;
  • the rear end of the presser foot lifting rocker 62 is rotatably sleeved on a first supporting pin 64 extending left and right, and the first supporting pin 64 is fixed to the housing 10 of the sewing machine, and the first supporting pin 64 constitutes the first fixed swing fulcrum of the presser foot lifting rocker 62;
  • the presser foot lifting push rod 63 extends left and right, the fixed point of the presser foot lifting push rod 63 and the presser foot lifting link 61 is located in the lower middle section of the presser foot lifting link 61 At this point, the part of the presser foot lifter rod 63 that protrudes to the left from the presser foot lifter link 61 is located on the lower side of the guide frame 23 and can abut against the guide frame 23.
  • the presser foot push rod 63 abuts and cooperates with the guide frame 23.
  • the drive crank 50 passes through
  • the presser foot lifting link 61 drives the presser foot push rod 63 to move up, and the presser foot push rod 63 pushes the guide frame 23 to move up together, and then drives the press rod 21 and the presser foot 22 to move up, thereby performing the presser foot lifting action.
  • the wire tension adjustment clutch assembly 70 includes a roller 71 installed on the right end surface of the driving crank 50, a driving lever 72 with a second fixed swing fulcrum, And the connecting joint 73 fixed on the clamping rod 31; the roller 71 is eccentric to the rotation center of the driving crank 50; the upper end of the driving lever 72 has a lever driving portion 721, and the lower end is provided with a sliding groove 722 extending along the length of the driving lever 72;
  • the connecting joint 73 includes a joint body portion 731 and a connecting shaft portion 732 extending from the right end of the joint body portion 731 to the right.
  • the front end of the wire clamping lever 31 is fixed in the joint body portion 731, and the connecting shaft portion 732 penetrates the driving lever. In the sliding groove 722 at the lower end of 72, and the two are slidingly matched.
  • the lever driving portion 721 of the driving lever 72 is separated from the roller 71.
  • the driving motor 40 drives the driving crank 50 to rotate, the driving lever 72 does not move, so The thread clamping lever 31 also does not move and maintains the current state, so that the thread clamping device 30 as a whole maintains the current state.
  • the lever drive portion 721 of the drive lever 72 abuts and cooperates with the roller 71.
  • the drive motor 40 drives the drive crank 50 to rotate
  • the drive crank 50 is moved by the roller 71
  • the driving lever 72 rotates around its second fixed swing fulcrum, and then drives the thread clamping lever 31 to move forward or right through the connecting joint 73, thereby adjusting the thread tension, or causing the thread clamp 30 to perform the thread clamping action, or the thread clamp 30 Perform the thread loosening action.
  • a second support pin 74 extending left and right is fixed on the left end surface of the bearing, and the driving lever 72 is rotatably sleeved on the second support pin 74.
  • the second support pin 74 constitutes the second fixed swing fulcrum of the drive lever 72.
  • the second support pin 74 is also provided with a circlip 75, which cooperates with the bearing to limit the driving lever 72 in the left-right direction.
  • the thread clamp 30 also includes a thread clamp base 35 fixed to the sewing machine housing 10, whereby the thread clamp 30 is integrally installed in the sewing machine housing 10; the thread clamp rod 31 is movably inserted into the thread clamp base 35 ,
  • the thread clamping piece 32 abuts against the rear end of the thread clamping spring 33.
  • the spring limit member 34 has the following two embodiments.
  • the spring limiting member 34 is a knob, and the knob and the wire clamping rod 31 are in a separate structure, and the connection between the two has the following two ways, the first way is to fix the two Connection, the knob is directly fixed on the back end of the thread clamping lever 31, at this time, the thread tension can only be automatically adjusted by the drive motor 40; Method two, the two are threaded, the knob is threaded to the spring limit piece 34, at this time, except In addition to automatically adjusting the thread tension by driving the motor 40, the thread tension can also be manually adjusted by manually turning the knob.
  • the second embodiment of the spring limiting member 34 is a knob, and the knob and the wire clamping rod 31 are in a separate structure, and the connection between the two has the following two ways, the first way is to fix the two Connection, the knob is directly fixed on the back end of the thread clamping lever 31, at this time, the thread tension can only be automatically adjusted by the drive motor 40;
  • the spring limiting member 34 is a brim part which is integrally formed at the rear end of the wire clamping rod 31, that is, the spring limiting member 34 and the wire clamping rod 31 are an integral structure At this time, the thread tension can only be automatically adjusted by driving the motor 40.
  • the manual presser foot lifting clutch assembly 90 includes a portable crank 91 rotatably installed in the sewing machine housing 10 and a portable connecting rod 92.
  • the portable crank 91 is fixedly connected to the portable wrench 80.
  • a connecting screw 95 extending forward and backward is fixed on the rear end of the portable crank 91.
  • the upper end of the portable connecting rod 92 is provided with a connecting sliding groove 921 extending along the extending direction of the portable connecting rod 92.
  • the connecting screw 95 is inserted in the connecting sliding groove 921.
  • connection screw 95 When the presser foot 22 is put down and pressed down, the connecting screw 95 abuts against the upper end of the connecting sliding groove 921, or is slightly lower than the upper end of the connecting sliding groove 921.
  • a mounting hole 922 is opened at the lower end of the portable link 92, and a connecting protrusion 231 protruding forward is provided on the front side of the guide frame 23. The connecting protrusion 231 is inserted into the mounting hole 922 and the two are rotationally matched.
  • the automatic presser foot clutch assembly 60 enables power transmission between the driving crank 50 and the guide frame 23, and the guide frame 23 drives the pressing rod 21 and the presser foot 22 to move up, and the guide frame 23 will also drive the portable
  • the connecting rod 92 moves upward, and the connecting slide groove 921 of the portable connecting rod 92 moves upward relative to the connecting screw 95.
  • the connecting screw 95 slides relatively in the connecting slide groove 921, so the connecting slide groove 921 is provided when the presser foot is automatically lifted.
  • the portable crank 91 and the portable wrench 80 are connected by a connecting shaft 94 extending back and forth.
  • the connecting shaft 94 is rotatably installed in the sewing machine housing 10, and the portable crank 91 is fixed in the connection
  • a hand spanner 80 is fixed to the front end of the connecting shaft 94.
  • the front side of the hand wrench 80 facing away from the sewing machine housing 10 is provided with a rotating operation part 81 protruding forwards away from the sewing machine housing 10, and the user can easily turn the hand wrench 80 through the rotating operation part 81 .
  • the connecting sliding groove 921 is a waist-shaped groove, and both upper and lower ends of the waist-shaped groove are arc segments.
  • the manual presser foot lifting clutch assembly 90 also includes a limit pin 93 fixed to the sewing machine housing 10, the limit pin 93 extends forward and backward, and the portable crank 91 is provided with an upward lifting limit surface 911 and The lower pressure limit surface 912, the limit pin 93 is located between the upper lift limit surface 911 and the lower pressure limit surface 912, or in other words, the limit pin 93 is located in the portable crank 91 formed on the upper lift limit surface 911 and the lower limit surface 911 The area between the limit surfaces 912 is pressed.
  • the presser foot 22 when the limit pin 93 is in contact with the upper limit surface 911, the presser foot 22 is in the state of lifting the presser foot, that is, when the limit pin 93 is in contact with the upper limit surface 911,
  • the rotation of the portable crank 91 forms a limit, thereby limiting the rotation of the portable wrench 80;
  • the limit pin 93 is in contact with the downward pressure limit surface 912, the presser foot 22 is in a downward pressure state, that is, through the limit pin 93 and
  • the abutment cooperation of the lower pressing limit surface 912 limits the rotation of the portable crank 91 when the presser foot 22 is lowered, thereby limiting the rotation of the portable wrench 80.
  • the electrical control module of the sewing machine controls the drive motor 40 to energize; when the sewing machine starts sewing, the electrical control module of the sewing machine controls the output angle of the drive motor 40 to be a value within the thread tension adjustment range, and the thread tension spring 33 is in In the compressed state, the thread tension spring 33 applies pressure to the thread tension piece 32 on the rear side, thereby causing the upper thread to have thread tension.
  • the motor shaft of the driving motor 40 rotates counterclockwise, driving the driving crank 50 to rotate counterclockwise together, so that the roller 71 moves backward, and then the lever driving part 721 at the upper end of the driving lever 72 is pushed backward.
  • the driving lever 72 swings clockwise around the second support pin 74, and the wire clamping lever 31 is driven to move forward through the connecting joint 73, and the wire clamping lever 31 drives the spring stopper 34 at the rear end thereof to move forward together to further compress the wire clamping spring 33 and clamp
  • the pressure applied by the thread spring 33 to the rear thread clamping piece 32 increases, thereby increasing the thread tension of the upper thread.
  • the motor shaft of the driving motor 40 rotates clockwise, driving the driving crank 50 to rotate clockwise together, so that the roller 71 moves forward, and the driving lever 72 rotates backwards around the second support pin 74
  • the thread clamping lever 31 is moved backward through the connecting joint 73, and the thread clamping lever 31 drives the spring stopper 34 at its rear end to move backward together.
  • the thread clamping spring 33 extends, and the thread clamping spring 33 pairs the rear clamping piece 32. The applied pressure is reduced, thereby reducing the thread tension of the upper thread.
  • the thread clamping lever 31 continues to move backward, the thread clamping spring 33 is fully restored to its original length, and the thread clamping force applied to the upper thread by the thread clamping piece 32 is zero, that is, the thread clamping device 30 performs the thread loosening action.
  • the motor shaft of the driving motor 40 continues to rotate clockwise, the roller 71 is separated from the lever driving portion 721 at the upper end of the driving lever 72, and then the presser foot can be raised.
  • the motor shaft of the driving motor 40 rotates clockwise to a rotation angle value within the range of the presser foot.
  • the drive crank 50 drives the presser foot lifter 63 to move upward through the presser foot connecting rod 61.
  • the presser foot lifting push rod 63 abuts the guide frame 23, pushes the guide frame 23 and the pressing rod 21 to move up, and lifts the presser foot 22; and the connecting slide groove 921 at the upper end of the portable link 92 slides upward relative to the connecting screw 95, The connecting screw 95 does not move.
  • the motor shaft of the driving motor 40 is located at different angles within the range of lifting the presser foot, the lifting height of the presser foot 22 is not the same, thereby having multiple presser lifting heights.
  • the presser foot 22 is in a state of being pressed down. At this time, the presser foot 22 is pressed against the needle plate of the sewing machine, the limit pin 93 abuts against the lower limit surface 912, and the connecting screw 95 is connected to The upper end of the sliding groove 921 abuts or is slightly lower than the upper end of the connecting sliding groove 921.
  • the present application controls the drive motor 40 through the sewing machine electronic control module, which can perform the thread clamping action, the thread loosening action, and the thread tension adjustment of the thread clamp 30, while also realizing automatic presser foot lifting and automatic presser foot lifting.
  • the height of the presser foot is controllable and the presser foot is manually lifted. When the presser foot 22 is raised and lowered, there is no impact, which reduces the noise during the operation of the sewing machine.
  • the present invention effectively overcomes various shortcomings in the prior art and has a high industrial value.

Abstract

A sewing machine, comprising a presser foot lifting assembly (20). The presser foot lifting assembly comprises a presser rod (21) capable of moving up and down, a presser foot (22) mounted at the lower end of the presser rod, and a guide frame (23) fixed on the presser rod. The sewing machine further comprises a drive source, a drive crank (50) driven by the drive source to rotate, an automatic presser foot lifting clutch assembly (60) connected between the drive crank and the guide frame, a handle (80) located on the outer side of a sewing machine housing (10), and a manual presser foot lifting clutch assembly (90) connected between the handle and the guide frame. When the automatic presser foot lifting clutch assembly enables power transmission between the drive crank and the guide frame, the manual presser foot lifting clutch assembly disables power transmission between the handle and the guide frame; when the manual presser foot lifting clutch assembly enables power transmission between the handle and the guide frame, the automatic presser foot lifting clutch assembly disables power transmission between the drive crank and the guide frame. The presser foot of the sewing machine can not only be automatically lifted, but also can be lifted manually, so that the operational convenience is improved, and usage properties of the sewing machine are improved.

Description

一种缝纫机A sewing machine
本申请要求于2020年05月15日提交中国专利局、申请号为202010413591.0、发明名称为“一种缝纫机”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010413591.0, and the invention title is "a kind of sewing machine" on May 15, 2020, the entire content of which is incorporated into this application by reference.
技术领域Technical field
本发明涉及一种缝纫机。The invention relates to a sewing machine.
背景技术Background technique
目前,平缝机中都配置有抬压脚机构,用于执行抬压脚动作。现有的抬压脚机构都为自动抬压脚机构,抬压脚驱动源通常为电磁铁,比如申请号为201821897744.8的中国实用新型专利说明书所公开的一种抬压脚机构。但是,在执行抬压脚动作时,缝纫机必须处于开机通电的状态,否则缝纫机的电控模块无法驱动电磁铁通断电。很显然,现有的自动抬压脚机构受缝纫机是否开机通电的限制,其不能满足缝纫机的所有工况,比如无法在缝纫机停机断电时执行抬压脚动作。另外,电磁铁驱动抬压脚时,电磁铁铁芯的运动行程为固定值,电磁铁动作时只能一次性将压脚上抬至最高点,而不能将压脚向上抬起至最高点下的任意高度,即抬压脚高度不可调;并且,由于电磁铁的运动性质,压脚抬起过程中会有较大冲量,压脚放下时也难以控制缓冲,故压脚抬起和放下时的冲击力都较大,进而产生较大的噪音振动。At present, all lockstitch sewing machines are equipped with a presser foot lifting mechanism for performing the presser foot lifting action. Existing presser foot lifting mechanisms are all automatic presser foot lifting mechanisms, and the drive source for presser foot lifting is usually an electromagnet, such as a presser foot lifting mechanism disclosed in the Chinese Utility Model Patent Application No. 201821897744.8. However, when the presser foot is raised, the sewing machine must be turned on and energized, otherwise the electrical control module of the sewing machine cannot drive the electromagnet to turn on or off. Obviously, the existing automatic presser foot lifting mechanism is restricted by whether the sewing machine is powered on or not, and it cannot meet all the working conditions of the sewing machine, for example, it cannot perform the presser foot lifting action when the sewing machine is stopped and powered off. In addition, when the electromagnet drives the presser foot, the movement stroke of the electromagnet core is a fixed value, and the electromagnet can only lift the presser foot to the highest point at one time, but cannot lift the presser foot up to the highest point. The height of the presser foot is not adjustable; and, due to the movement nature of the electromagnet, there will be a greater impulse during the presser foot lifting process, and it is difficult to control the buffer when the presser foot is lowered, so when the presser foot is raised and lowered The impact force is relatively large, which in turn produces relatively large noise and vibration.
进一步地,缝纫机上还设置有夹线器,夹线器为电子夹线器、驱动源也为电磁铁,缝纫时夹线器夹线、给予面线一定的线张力,剪线时夹线器松线,以能够在机针侧得到较长的面线线头,由此避免面线从机针中脱离出。因此,缝纫机中至少配置两个电磁铁,分别用于执行抬压脚、以及夹线和松线,故而增加了缝纫机的成本,且使得缝纫机的体积较为庞大。Furthermore, the sewing machine is also provided with a thread clamp. The thread clamp is an electronic thread clamp and the drive source is also an electromagnet. The thread clamp clamps the thread during sewing and gives a certain thread tension to the upper thread. The thread clamp is used for trimming. Loosen the thread so that a longer upper thread end can be obtained on the needle side, thereby preventing the upper thread from escaping from the needle. Therefore, the sewing machine is equipped with at least two electromagnets for performing presser foot lifting, thread clamping and thread loosening, respectively, which increases the cost of the sewing machine and makes the sewing machine bulky.
进一步地,夹线器上还配置有调节旋钮,调节旋钮作用于夹线器中的 夹线弹簧,用户手动转动调节旋钮可调节夹线弹簧的弹簧力,由此调节夹线器施加于面线的夹线力,也即调节线张力。因此,现有缝纫机中夹线器的夹线力为手动调节,费时费力。Further, the thread clamp is also equipped with an adjusting knob, which acts on the thread clamp spring in the thread clamp. The user manually rotates the adjusting knob to adjust the spring force of the thread clamp spring, thereby adjusting the thread clamp applied to the upper thread. The tension of the thread, that is, adjust the thread tension. Therefore, the thread clamping force of the thread clamp in the existing sewing machine is manually adjusted, which is time-consuming and labor-intensive.
发明内容Summary of the invention
鉴于以上所述现有技术的缺点,本发明的目的在于提供一种缝纫机,其既能自动抬压脚,又能手动抬压脚。In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sewing machine that can both automatically lift the presser foot and manually lift the presser foot.
为实现上述目的,本发明提供一种缝纫机,包括抬压脚组件,所述抬压脚组件包括可上下移动的压杆、安装在压杆下端的压脚、以及固定在压杆上的导架,所述缝纫机还包括驱动源、由驱动源驱动转动的驱动曲柄、连接在驱动曲柄和导架之间的自动抬压脚离合组件、位于缝纫机机壳外部的手提扳手、以及连接在手提扳手和导架之间的手动抬压脚离合组件;当所述自动抬压脚离合组件使驱动曲柄和导架之间有动力传递时,所述手动抬压脚离合组件使手提扳手和导架之间无动力传递;当所述手动抬压脚离合组件使手提扳手和导架之间有动力传递时,所述自动抬压脚离合组件使驱动曲柄和导架之间无动力传递。In order to achieve the above object, the present invention provides a sewing machine, including a presser foot assembly, the presser foot assembly includes a press bar that can move up and down, a presser foot installed at the lower end of the press bar, and a guide frame fixed on the press bar The sewing machine further includes a driving source, a driving crank driven to rotate by the driving source, an automatic presser foot clutch assembly connected between the driving crank and the guide frame, a hand-held wrench located outside the sewing machine casing, and a hand-held wrench and The manual presser foot lifting clutch assembly between the guide frames; when the automatic presser foot lifting clutch assembly enables power transmission between the driving crank and the guide frame, the manual presser foot lifting clutch assembly makes the hand spanner and the guide frame No power transmission; when the manual presser foot lifting clutch assembly causes power transmission between the hand wrench and the guide frame, the automatic presser foot lifting clutch assembly causes no power transmission between the drive crank and the guide frame.
进一步地,所述缝纫机还包括夹线器和线张力调节离合组件;所述夹线器包括可轴向移动的夹线杆、套装在夹线杆上的夹线片和夹线弹簧、以及设置在夹线杆上的弹簧限位件,所述夹线弹簧的两端与夹线片和弹簧限位件抵接;所述张力调节离合组件连接在所述驱动曲柄和夹线杆之间;所述驱动源为一驱动电机,该驱动电机的输出转角具有抬压脚范围和线张力调节范围;当所述驱动电机的电机轴在抬压脚范围内转动时,所述自动抬压脚离合组件使驱动曲柄和导架之间有动力传递,所述线张力调节离合组件使驱动曲柄和夹线杆之间无动力传递;当所述驱动电机的电机轴在线张力调节范围内转动时,所述自动抬压脚离合组件使驱动曲柄和导架之间无动力传递,所述线张力调节离合组件使驱动曲柄和夹线杆之间有动力传递。Further, the sewing machine further includes a thread clamp and a thread tension adjustment clutch assembly; the thread clamp includes an axially movable thread clamp rod, a thread clamp piece and a thread clamp spring sleeved on the thread clamp rod, and a set A spring stopper on the wire clamping lever, the two ends of the wire clamping spring abut the wire clamping piece and the spring stopper; the tension adjustment clutch assembly is connected between the drive crank and the wire clamping lever; The driving source is a driving motor, and the output angle of the driving motor has a presser foot lifting range and a wire tension adjustment range; when the motor shaft of the driving motor rotates within the presser foot lifting range, the automatic presser foot lifting clutch The assembly enables power transmission between the drive crank and the guide frame, and the wire tension adjustment clutch assembly causes no power transmission between the drive crank and the wire clamping lever; when the motor shaft of the drive motor rotates within the online tension adjustment range, all The automatic presser foot lifting clutch assembly enables no power transmission between the driving crank and the guide frame, and the wire tension adjusting clutch assembly enables power transmission between the driving crank and the wire clamping rod.
进一步地,当所述驱动电机的电机轴在抬压脚范围内转动时,所述夹 线器处于松线状态。Further, when the motor shaft of the driving motor rotates within the range of lifting the presser foot, the thread clamp is in a thread-releasing state.
进一步地,所述自动抬压脚离合组件包括抬压脚连杆、具有第一固定摆动支点的抬压脚摇杆、以及固定于抬压脚连杆的抬压脚推杆,所述抬压脚连杆的两端分别与驱动曲柄和抬压脚摇杆铰接、且抬压脚连杆与驱动曲柄的铰接点偏心于驱动曲柄的转动中心;当所述驱动电机的电机轴在抬压脚范围内转动时,所述抬压脚推杆与导架抵接配合;当所述手动抬压脚离合组件使手提扳手和导架之间有动力传递时、或所述驱动电机的电机轴在线张力调节范围内转动时,所述抬压脚推杆位于导架的下方、两者分离。Further, the automatic presser foot lifting clutch assembly includes a presser foot lifting link, a presser foot lifting rocker having a first fixed swing fulcrum, and a presser foot lifting push rod fixed to the presser foot lifting link. The two ends of the foot connecting rod are respectively hinged with the driving crank and the presser foot lifting rocker, and the hinge point of the presser foot lifting connecting rod and the driving crank is eccentric to the rotation center of the driving crank; when the motor shaft of the driving motor is lifting the presser foot When rotating within the range, the presser foot lifting push rod abuts and cooperates with the guide frame; when the manual presser foot lifting clutch assembly enables power transmission between the hand spanner and the guide frame, or the motor shaft of the drive motor is online When rotating within the tension adjustment range, the presser foot lifting push rod is located below the guide frame and the two are separated.
进一步地,所述线张力调节离合组件包括安装在驱动曲柄上的滚轮、具有第二固定摆动支点的驱动杠杆、以及固定在夹线杆上的连接接头,所述驱动杠杆的一端具有杠杆驱动部、另一端开设有沿驱动杠杆长度方向延伸的滑槽,所述连接接头上具有连接轴部,所述连接轴部穿设在滑槽中、两者滑动配合;当所述驱动电机的电机轴在抬压脚范围内转动时,所述驱动杠杆的杠杆驱动部与滚轮相分离;当所述驱动电机的电机轴在线张力调节范围内转动时,所述驱动杠杆的杠杆驱动部与滚轮抵接配合。Further, the wire tension adjusting clutch assembly includes a roller mounted on a driving crank, a driving lever having a second fixed swing fulcrum, and a connecting joint fixed on the wire clamping rod, and one end of the driving lever has a lever driving part , The other end is provided with a sliding groove extending along the length of the driving lever, the connecting joint has a connecting shaft part, the connecting shaft part is inserted in the sliding groove, and the two slidingly cooperate; when the motor shaft of the driving motor When rotating within the range of lifting the presser foot, the lever driving part of the driving lever is separated from the roller; when the motor shaft of the driving motor rotates within the online tension adjustment range, the lever driving part of the driving lever abuts against the roller Cooperate.
进一步地,所述夹线器还包括固定于缝纫机机壳的夹线座,所述夹线杆可移动地穿设在夹线座中,所述夹线片有两个、且两个夹线片之间形成有夹线腔,其中一个夹线片与所述夹线座抵接、另一个夹线片与所述夹线弹簧抵接。Further, the thread clamp further includes a thread clamp seat fixed to the housing of the sewing machine, the thread clamp rod is movably inserted in the thread clamp seat, and the thread clamp has two and two thread clamps. A wire clamping cavity is formed between the pieces, one of the wire clamping pieces abuts the wire clamping seat, and the other wire clamping piece abuts the wire clamping spring.
进一步地,所述弹簧限位件为一旋钮,所述旋钮与夹线杆之间为分体结构,所述夹线杆与旋钮固定连接或螺纹连接。Further, the spring limiting member is a knob, and the knob and the wire clamping rod are in a separate structure, and the wire clamping rod is fixedly connected or threaded to the knob.
进一步地,所述弹簧限位件为一帽檐部,所述帽檐部一体地形成在所述夹线杆上。Further, the spring limiting member is a brim portion, and the brim portion is integrally formed on the wire clamping rod.
进一步地,所述手动抬压脚离合组件包括可转动地安装在缝纫机机壳中的手提曲柄、以及手提连杆;所述手提曲柄与手提扳手固定相连;所述手提曲柄上固定有一连接螺钉,所述手提连杆的一端开设有沿手提连杆延伸方向延伸的连接滑槽,所述连接螺钉穿设在连接滑槽中、且两者转动配 合;所述手提连杆的另一端与导架相连;当所述自动抬压脚离合组件使驱动曲柄和导架之间有动力传递时,所述连接螺钉在连接滑槽中滑动;当所述手动抬压脚离合组件使手提扳手和导架之间有动力传递时,所述连接螺钉与连接滑槽的端部抵接。Further, the manual presser foot lifting clutch assembly includes a portable crank and a portable connecting rod rotatably installed in the housing of the sewing machine; the portable crank is fixedly connected with the portable wrench; a connecting screw is fixed on the portable crank, One end of the portable link is provided with a connecting chute extending along the extending direction of the portable link, the connecting screw is inserted in the connecting chute, and the two are rotatably matched; the other end of the portable link is connected to the guide frame When the automatic presser foot lifting clutch assembly causes power transmission between the drive crank and the guide frame, the connecting screw slides in the connecting chute; when the manual presser foot lifting clutch assembly makes the hand spanner and the guide frame When there is power transmission between, the connecting screw abuts against the end of the connecting chute.
进一步地,所述手动抬压脚离合组件还包括固定于缝纫机机壳的限位销,所述手提曲柄上设有上抬限位面和下压限位面,所述限位销位于上抬限位面和下压限位面之间;当所述限位销与上抬限位面抵接时,所述压脚处于抬压脚状态;当所述限位销与下压限位面抵接时,所述压脚处于下压状态。Further, the manual presser foot lifting clutch assembly further includes a limit pin fixed to the sewing machine casing, and the hand crank is provided with an upward lifting limit surface and a downward pressing limit surface, and the limit pin is located on the upper lift Between the limit surface and the lower pressure limit surface; when the limit pin is in contact with the upper limit surface, the presser foot is in the state of the presser foot; When abutting, the presser foot is in a pressed state.
如上所述,本发明涉及的缝纫机,具有以下有益效果:As mentioned above, the sewing machine related to the present invention has the following beneficial effects:
本申请中,通过驱动源、驱动曲柄和自动抬压脚离合组件可驱动压脚上移,实现自动抬压脚;通过手提扳手和手动抬压脚离合组件也可驱动压脚上移,实现手动抬压脚。因此,本申请涉及的缝纫机既能自动抬压脚,又能手动抬压脚,从而提高操作便利性,提升缝纫机的使用性能。In this application, the presser foot can be driven to move up through the drive source, the drive crank and the automatic presser foot lifting clutch assembly to realize automatic presser foot lifting; the presser foot can also be driven to move up by the portable wrench and the manual presser foot lifting clutch assembly to realize manual Lift the presser foot. Therefore, the sewing machine involved in the present application can both automatically lift the presser foot and manually lift the presser foot, thereby improving the convenience of operation and improving the use performance of the sewing machine.
附图说明Description of the drawings
图1为本申请中缝纫机的结构示意图。Figure 1 is a schematic diagram of the structure of the sewing machine in this application.
图2为本申请中抬压脚组件、驱动源、驱动曲柄、自动抬压脚离合组件、手提扳手、手动抬压脚离合组件、夹线器、以及线张力调节离合组件之间的连接示意图。Figure 2 is a schematic diagram of the connection between the presser foot lifting assembly, drive source, drive crank, automatic presser foot lifting clutch assembly, hand spanner, manual presser foot lifting clutch assembly, thread clamp, and thread tension adjustment clutch assembly in this application.
图3为本申请中抬压脚组件、手提扳手和手动抬压脚离合组件之间的连接示意图。Figure 3 is a schematic diagram of the connection between the presser foot lifting assembly, the hand-held wrench and the manual presser foot lifting clutch assembly in this application.
图4为本申请中抬压脚组件、驱动源、驱动曲柄和自动抬压脚离合组件之间的连接示意图。4 is a schematic diagram of the connection between the presser foot lifting assembly, the driving source, the driving crank and the automatic presser foot lifting clutch assembly in this application.
图5为本申请中驱动源、驱动曲柄、夹线器、以及线张力调节离合组件之间的连接示意图。Figure 5 is a schematic diagram of the connection between the drive source, the drive crank, the thread clamp, and the thread tension adjustment clutch assembly in this application.
图6为本申请中驱动曲柄、夹线器、以及线张力调节离合组件之间的 连接示意图。Figure 6 is a schematic diagram of the connection between the drive crank, the thread clamp, and the thread tension adjustment clutch assembly in this application.
图7至图9为本申请中缝纫机手动抬压脚的过程图。Figures 7 to 9 are process diagrams of the sewing machine manually lifting the presser foot in this application.
元件标号说明Component label description
10                 机壳10 Chassis
20                 抬压脚组件20 Presser foot assembly
21                 压杆21 Compression bar
22                 压脚22 Presser foot
23                 导架23 Guide frame
231                连接凸部231 Connecting convex part
24                 衬套24 Bushing
30                 夹线器30 Wire clamp
31                 夹线杆31 Clamping rod
32                 夹线片32 Clipping sheet
33                 夹线弹簧33 Wire clamping spring
34                 弹簧限位件34 Spring limiter
35                 夹线座35 Clamping seat
40                 驱动电机40 Drive motor
50                 驱动曲柄50 Drive the crank
60                 自动抬压脚离合组件60 Clutch assembly for automatic presser foot lifting
61                 抬压脚连杆61 Lifting the presser foot link
62                 抬压脚摇杆62 Lifting the presser foot rocker
63                 抬压脚推杆63 Lifting the presser foot and push rod
64                 第一支撑销64 First support pin
70                 线张力调节离合组件70 Wire tension adjustment clutch assembly
71                 滚轮71 Rolling wheel
72                 驱动杠杆72 Drive leverage
721                 杠杆驱动部721 Leverage Drive Department
722                 滑槽722 Chute
73                  连接接头73 Connecting joints
731                 接头本体部731 Connector body
732                 连接轴部732 Connecting shaft
74                  第二支撑销74 The second support pin
75                  卡簧75 Circlip
80                  手提扳手80 Hand-held wrench
81                  转动操作部81 Turn the operation department
90                  手动抬压脚离合组件90 Manually lifting the presser foot clutch assembly
91                  手提曲柄91 Portable crank
911                 上抬限位面911 Raising the limit surface
912                 下压限位面912 Lowering the limit surface
92                  手提连杆92 Portable connecting rod
921                 连接滑槽921 Connecting chute
922                 安装孔922 Mounting holes
93                  限位销93 Limit pin
94                  连接轴94 Connecting shaft
95                  连接螺钉95 Connecting screws
110                 电机座110 Motor seat
120                 轴套120 Shaft sleeve
130                 压脚弹簧130 Presser foot spring
具体实施方式Detailed ways
以下由特定的具体实施例说明本发明的实施方式,熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。The following specific examples illustrate the implementation of the present invention. Those familiar with the technology can easily understand the other advantages and effects of the present invention from the content disclosed in this specification.
须知,本说明书附图所绘的结构、比例、大小等,均仅用以配合说明 书所揭示的内容,以供熟悉此技术的人士了解与阅读,并非用以限定本发明可实施的限定条件,故不具技术上的实质意义,任何结构的修饰、比例关系的改变或大小的调整,在不影响本发明所能产生的功效及所能达成的目的下,均应仍落在本发明所揭示的技术内容能涵盖的范围内。同时,本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语,亦仅为便于叙述明了,而非用以限定本发明可实施的范围,其相对关系的改变或调整,在无实质变更技术内容下,当亦视为本发明可实施的范畴。It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not used to limit the implementation of the present invention. Therefore, it has no technical significance. Any structural modification, proportional relationship change, or size adjustment should still fall within the scope of the present invention without affecting the effects and objectives that can be achieved by the present invention. The technical content can cover the range. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for convenience of description and are not used to limit the present invention. The scope of implementation, and the change or adjustment of the relative relationship, shall also be regarded as the scope of implementation of the present invention without substantial changes to the technical content.
本申请提供一种缝纫机。为便于叙述,下述实施例中,各方向的定义如下:将缝纫机中主轴的轴向定义为左右方向,且主轴朝向缝纫机机头(即机针侧)的方向为左方向,主轴朝向缝纫机机尾的方向为右方向;将缝纫机正缝时缝料的移动方向定义为前方向;将与左右方向和前后方向都正交的方向定义为上下方向。This application provides a sewing machine. For ease of description, in the following embodiments, the definitions of each direction are as follows: the axial direction of the main shaft of the sewing machine is defined as the left and right direction, and the direction of the main shaft facing the sewing machine head (ie, the needle side) is the left direction, and the main shaft faces the sewing machine. The direction of the tail is the right direction; the movement direction of the sewing material when the sewing machine is sewing is defined as the front direction; the direction orthogonal to both the left and right directions and the front and rear directions is defined as the up and down direction.
如图1和图2所示,本申请涉及的缝纫机包括机壳10、抬压脚组件20、驱动源、驱动曲柄50、自动抬压脚离合组件60、手提扳手80、以及手动抬压脚离合组件90。其中,抬压脚组件20包括上下延伸的压杆21、安装在压杆21下端的压脚22、以及固定在压杆21上端的导架23,压杆21可上下移动地安装在缝纫机机壳10中。驱动源安装于缝纫机机壳10,驱动源的输出端与驱动曲柄50相连、带动驱动曲柄50转动。自动抬压脚离合组件60连接在驱动曲柄50和导架23之间。手提扳手80设置在缝纫机机壳10的外部、位于缝纫机机壳10的前侧,手动抬压脚离合组件90连接在手提扳手80和导架23之间。As shown in Figures 1 and 2, the sewing machine involved in the present application includes a housing 10, a presser foot lifting assembly 20, a drive source, a drive crank 50, an automatic presser foot lifting clutch assembly 60, a hand spanner 80, and a manual presser foot lifting clutch Component 90. Among them, the presser foot lifting assembly 20 includes a presser bar 21 extending up and down, a presser foot 22 installed at the lower end of the presser bar 21, and a guide frame 23 fixed at the upper end of the presser bar 21. The presser bar 21 is mounted on the sewing machine housing so as to move up and down. 10 in. The driving source is installed in the sewing machine housing 10, and the output end of the driving source is connected with the driving crank 50 to drive the driving crank 50 to rotate. The automatic presser foot lifting clutch assembly 60 is connected between the driving crank 50 and the guide frame 23. The portable wrench 80 is arranged on the outside of the sewing machine casing 10 and located on the front side of the sewing machine casing 10, and the manual presser foot lifting clutch assembly 90 is connected between the portable wrench 80 and the guide frame 23.
上述缝纫机需要抬压脚时,可以有自动抬压脚和手动抬压脚这两种方式。需要自动抬压脚时,缝纫机处于开机通电状态,驱动源也相应地处于通电状态;驱动源动作、但手提扳手80不动作,驱动源带动驱动曲柄50转动,驱动曲柄50通过自动抬压脚离合组件60驱动导架23上移,导架23带动压杆21和压脚22一起上移,实现自动抬压脚;并且,自动抬压脚过程中,手动抬压脚离合组件90使手提扳手80和导架23之间无动力传递, 故导架23的上移不会通过手动抬压脚离合组件90作用于手提扳手80,手提扳手80维持在当前位置。需要手动抬压脚时,转动手提扳手80、但驱动源不动作,手提扳手80通过手动抬压脚离合组件90驱动导架23上移,导架23带动压杆21和压脚22一起上移,实现手动抬压脚;并且,手动抬压脚过程中,自动抬压脚离合组件60使驱动曲柄50和导架23之间无动力传递,故导架23的上移不会通过自动抬压脚离合组件60作用于驱动曲柄50和驱动源,驱动曲柄50和驱动源各自在维持当前位置。因此,本申请涉及的缝纫机既能自动抬压脚,又能手动抬压脚,而手动抬压脚的操作不受缝纫机是否开机通电的限制,在缝纫机开机通电时、以及停机断电时都能够执行手动抬压脚动作,从而提高操作便利性,提升缝纫机的使用性能。When the above sewing machine needs to lift the presser foot, there can be two methods of automatic presser foot lifting and manual presser foot lifting. When the presser foot needs to be automatically lifted, the sewing machine is in the power-on state, and the drive source is also in the power-on state accordingly; the drive source acts, but the hand spanner 80 does not act, and the drive source drives the drive crank 50 to rotate, and the drive crank 50 is clutched by the automatic presser foot lifting The assembly 60 drives the guide frame 23 to move up, and the guide frame 23 drives the press bar 21 and the presser foot 22 to move up together to realize the automatic presser foot lifting; and, during the automatic presser foot lifting process, the presser foot clutch assembly 90 is manually lifted to make the hand spanner 80 There is no power transmission between the guide frame 23 and the guide frame 23, so the upward movement of the guide frame 23 will not act on the portable wrench 80 through the manual presser foot lifting clutch assembly 90, and the portable wrench 80 is maintained at the current position. When the presser foot needs to be manually lifted, turn the hand spanner 80, but the drive source does not move, the hand spanner 80 drives the guide frame 23 upward through the manual presser foot clutch assembly 90, and the guide frame 23 drives the pressure rod 21 and the presser foot 22 to move upward together , Realize the manual presser foot lifting process; and, in the process of manual presser foot lifting, the automatic presser foot clutch assembly 60 causes no power transmission between the driving crank 50 and the guide frame 23, so the upward movement of the guide frame 23 will not be automatically lifted and pressed The foot clutch assembly 60 acts on the drive crank 50 and the drive source, and the drive crank 50 and the drive source maintain their current positions respectively. Therefore, the sewing machine involved in the present application can both automatically lift the presser foot and manually lift the presser foot. The manual presser foot lifting operation is not limited by whether the sewing machine is powered on or not. It can be powered on and when the sewing machine is powered off. Perform manual presser foot lifting action, thereby improving the convenience of operation and improving the performance of the sewing machine.
进一步地,如图1和图2所示,缝纫机还包括夹线器30和线张力调节离合组件70。夹线器30包括前后延伸的夹线杆31、都套装在夹线杆31上的夹线片32和夹线弹簧33、以及设置在夹线杆31后端的弹簧限位件34,夹线杆31可前后移动地安装在缝纫机机壳10中,夹线弹簧33前后延伸,夹线弹簧33的前后两端分别与夹线片32和弹簧限位件34抵接,即夹线片32、夹线弹簧33和弹簧限位件34从前至后依次分布。张力调节离合组件连接在驱动曲柄50和夹线杆31之间。驱动源为一驱动电机40,该驱动电机40的电机轴与驱动曲柄50相连、带动驱动曲柄50转动。特别地,驱动电机40的输出转角具有抬压脚范围和线张力调节范围,线张力调节范围包含对应线张力为零的转角值。Further, as shown in FIGS. 1 and 2, the sewing machine further includes a thread clamp 30 and a thread tension adjustment clutch assembly 70. The thread clamp 30 includes a thread clamp rod 31 extending back and forth, a thread clamp piece 32 and a thread spring 33 sleeved on the thread clamp rod 31, and a spring limiter 34 arranged at the rear end of the thread clamp rod 31, the thread clamp rod 31 is installed in the sewing machine housing 10 so that it can move back and forth. The thread clamping spring 33 extends forward and backward. The wire spring 33 and the spring limiter 34 are distributed in sequence from front to back. The tension adjusting clutch assembly is connected between the driving crank 50 and the wire clamping rod 31. The driving source is a driving motor 40, and the motor shaft of the driving motor 40 is connected with the driving crank 50 to drive the driving crank 50 to rotate. In particular, the output rotation angle of the driving motor 40 has a presser foot lifting range and a wire tension adjustment range, and the wire tension adjustment range includes a rotation angle value corresponding to a wire tension of zero.
当驱动电机40的电机轴在抬压脚范围内转动时,自动抬压脚离合组件60使驱动曲柄50和导架23之间有动力传递,线张力调节离合组件70使驱动曲柄50和夹线杆31之间无动力传递;此时,驱动电机40带动驱动曲柄50转动时,通过自动抬压脚离合组件60驱动压杆21上移,压杆21带动压脚22一起上移,执行自动抬压脚动作,而夹线器30不动作、维持当前状态;并且,驱动电机40的输出转角可控,使得压杆21上移的行程也可控,进而使得自动抬压脚时压脚22抬起的高度也可控,能够将压脚22 向上抬起至最高点下的任意高度。当驱动电机40的电机轴在线张力调节范围内转动时,自动抬压脚离合组件60使驱动曲柄50和导架23之间无动力传递,线张力调节离合组件70使驱动曲柄50和夹线杆31之间有动力传递;此时,驱动电机40带动驱动曲柄50转动时,通过线张力调节离合组件70驱动夹线杆31前移或后移;夹线杆31带动弹簧限位件34前移时,夹线弹簧33的长度减小,夹线弹簧33作用在夹线片32上的压力增加,由此可以使夹线器30执行夹线动作、或者增加夹线器30施加于面线的夹线力,也即增加面线的线张力;夹线杆31带动弹簧限位件34后移时,夹线弹簧33的长度增加,夹线弹簧33作用在夹线片32上的压力减小,由此可以使夹线器30执行松线动作、或者减小夹线器30施加于面线的夹线力,也即减小面线的线张力;当夹线弹簧33完全恢复到原始长度时,夹线片32施加于面线的夹线力为零;而抬压脚组件20不动作,压脚22维持当前状态。When the motor shaft of the drive motor 40 rotates within the presser foot lifting range, the automatic presser foot clutch assembly 60 enables power transmission between the drive crank 50 and the guide frame 23, and the thread tension adjustment clutch assembly 70 drives the drive crank 50 and the thread clamping There is no power transmission between the rods 31; at this time, when the drive motor 40 drives the drive crank 50 to rotate, the automatic presser foot clutch assembly 60 drives the pressing rod 21 to move up, and the pressing rod 21 drives the presser foot 22 to move up together to perform automatic lifting. The presser foot moves, but the thread clamp 30 does not work and maintains the current state; and the output angle of the drive motor 40 is controllable, so that the stroke of the pressing rod 21 is also controllable, so that the presser foot 22 is lifted when the presser foot is automatically lifted The lifting height is also controllable, and the presser foot 22 can be lifted up to any height below the highest point. When the motor shaft of the drive motor 40 rotates within the wire tension adjustment range, the automatic presser foot clutch assembly 60 causes no power transmission between the drive crank 50 and the guide frame 23, and the wire tension adjustment clutch assembly 70 drives the crank 50 and the thread clamping lever There is power transmission between 31; at this time, when the drive motor 40 drives the drive crank 50 to rotate, the wire tension adjustment clutch assembly 70 drives the wire clamping lever 31 to move forward or backward; the wire clamping lever 31 drives the spring limiter 34 to move forward At this time, the length of the thread clamping spring 33 decreases, and the pressure of the thread clamping spring 33 on the thread clamping piece 32 increases, so that the thread clamp 30 can perform the thread clamping action or increase the amount of the thread clamp 30 applied to the upper thread. Thread clamping force, that is, increase the thread tension of the upper thread; when the thread clamping lever 31 drives the spring limiter 34 to move backward, the length of the thread clamping spring 33 increases, and the pressure of the thread clamping spring 33 on the thread clamping piece 32 decreases Therefore, the thread clamp 30 can perform the thread loosening action, or reduce the thread clamping force applied by the thread clamp 30 to the upper thread, that is, reduce the thread tension of the upper thread; when the thread tension spring 33 is fully restored to its original length At this time, the thread clamping force applied by the thread clamping piece 32 to the upper thread is zero; and the presser foot assembly 20 does not move, and the presser foot 22 maintains the current state.
因此,本申请涉及的缝纫机除了能够实现自动抬压脚和手动抬压脚外,还实现了采用同一个驱动电机40进行自动抬压脚和自动调节线张力,在自动调节线张力时包含执行夹线器30的夹线动作和松线动作,在自动抬压脚时能够将压脚22向上抬起至最高点下的任意高度,并且驱动电机40在运转过程中不会产生冲击力。因此,本申请能够降低缝纫机的成本,优化缝纫机的结构,降低压脚22抬起和放下时、调节线张力时、夹线器30夹线时、夹线器30松线时的噪音、压脚22抬起的高度可控。Therefore, in addition to the automatic presser foot lifting and manual presser foot lifting, the sewing machine involved in the present application also realizes the use of the same drive motor 40 to automatically lift the presser foot and automatically adjust the thread tension, including the execution clamp when automatically adjusting the thread tension. The thread clamping action and the thread loosening action of the threader 30 can lift the presser foot 22 up to any height below the highest point when the presser foot is automatically lifted, and the drive motor 40 will not generate impact during operation. Therefore, the present application can reduce the cost of the sewing machine, optimize the structure of the sewing machine, and reduce the noise and pressure foot when the presser foot 22 is raised and lowered, when the thread tension is adjusted, when the thread clamp 30 is clamping the thread, and the thread clamp 30 is loosening the thread. 22 The lifting height is controllable.
较优地,如图2所示,压杆21可上下移动地穿设在一衬套24中,该衬套24固定在机壳10中,压脚22的下方为缝纫机的针板。驱动电机40为一步进电机,能够提高控制精度。驱动电机40固定安装在一电机座110上,电机座110再通过螺钉固定安装在机壳10上,进而将驱动电机40安装于机壳10。电机座110上的左侧面上还固定有一轴套120,驱动电机40的电机轴左右延伸、且可转动地支撑在轴套120中,驱动曲柄50固定在驱动电机40的电机轴的左端,驱动电机40直接带动驱动曲柄50转动。如图4所示,压杆21的上端套接有一压脚22弹簧,该压脚22弹簧下压压杆21, 从而使压脚22具有向下的作用力,使压脚22具有将布料向下压在针板上的压力。Preferably, as shown in FIG. 2, the pressing rod 21 can be moved up and down through a bushing 24 which is fixed in the casing 10, and the needle plate of the sewing machine is under the pressing foot 22. The driving motor 40 is a stepping motor, which can improve the control accuracy. The driving motor 40 is fixedly installed on a motor base 110, and the motor base 110 is fixedly installed on the casing 10 by screws, and then the driving motor 40 is installed on the casing 10. A shaft sleeve 120 is also fixed on the left side of the motor base 110. The motor shaft of the drive motor 40 extends left and right and is rotatably supported in the shaft sleeve 120. The drive crank 50 is fixed on the left end of the motor shaft of the drive motor 40. The driving motor 40 directly drives the driving crank 50 to rotate. As shown in Figure 4, the upper end of the pressure rod 21 is sleeved with a pressure foot 22 spring, which presses down the pressure rod 21, so that the pressure foot 22 has a downward force, so that the pressure foot 22 can move the cloth toward The pressure on the needle plate.
进一步地,当驱动电机40的电机轴在抬压脚范围内转动时,夹线器30处于松线状态,此时,夹线器30中的夹线弹簧33完全恢复到原始长度,面线的线张力为零。Further, when the motor shaft of the driving motor 40 rotates within the range of lifting the presser foot, the thread clamp 30 is in a loose thread state. At this time, the thread clamp spring 33 in the thread clamp 30 is completely restored to its original length. The thread tension is zero.
自动抬压脚离合组件60的优选结构为:如图4所示,自动抬压脚离合组件60包括抬压脚连杆61、具有第一固定摆动支点的抬压脚摇杆62、以及固定于抬压脚连杆61的抬压脚推杆63;抬压脚连杆61的上端通过一左右延伸的轴位螺钉铰接在驱动曲柄50的左端面、且抬压脚连杆61与驱动曲柄50的铰接点偏心于驱动曲柄50的转动中心,驱动曲柄50的转动中心即为驱动电机40的电机轴的转动中心;抬压脚连杆61的下端与抬压脚摇杆62的前端通过一左右延伸的轴位螺钉铰接;抬压脚摇杆62的后端可转动地套装在一左右延伸的第一支撑销64上,该第一支撑销64固定于缝纫机的机壳10,第一支撑销64构成抬压脚摇杆62的第一固定摆动支点;抬压脚推杆63左右延伸,抬压脚推杆63与抬压脚连杆61的固定点位于抬压脚连杆61的中下段处,抬压脚推杆63向左伸出于抬压脚连杆61的这部分位于导架23的下方侧、并能够与导架23相抵接。具体说,当驱动电机40的电机轴在抬压脚范围内转动时,抬压脚推杆63与导架23抵接配合,此时,驱动电机40带动驱动曲柄50转动时,驱动曲柄50通过抬压脚连杆61带动抬压脚推杆63上移,抬压脚推杆63推动导架23一起上移,进而驱动压杆21和压脚22上移,由此执行抬压脚动作。当驱动电机40的电机轴在线张力调节范围内转动时、或者当手动抬压脚离合组件90使手提扳手80和导架23之间有动力传递时(即在手动抬压脚时),抬压脚推杆63始终位于导架23的下方、两者分离,此时,驱动电机40带动驱动曲柄50转动时,虽然抬压脚推杆63在运动,但抬压脚推杆63始终不接触导架23,故导架23维持当前状态,使得抬压脚组件20整体维持当前状态。The preferred structure of the automatic presser foot lifting clutch assembly 60 is: as shown in FIG. 4, the automatic presser foot lifting clutch assembly 60 includes a presser foot lifting link 61, a presser foot lifting rocker 62 having a first fixed swing fulcrum, and a presser foot lifting rocker 62 fixed at The presser foot push rod 63 of the presser foot lift link 61; the upper end of the presser foot link 61 is hinged on the left end surface of the driving crank 50 by an axial screw extending left and right, and the presser foot lift link 61 and the driving crank 50 The hinge point is eccentric to the center of rotation of the driving crank 50. The center of rotation of the driving crank 50 is the center of rotation of the motor shaft of the driving motor 40; The extended axis screw is hinged; the rear end of the presser foot lifting rocker 62 is rotatably sleeved on a first supporting pin 64 extending left and right, and the first supporting pin 64 is fixed to the housing 10 of the sewing machine, and the first supporting pin 64 constitutes the first fixed swing fulcrum of the presser foot lifting rocker 62; the presser foot lifting push rod 63 extends left and right, the fixed point of the presser foot lifting push rod 63 and the presser foot lifting link 61 is located in the lower middle section of the presser foot lifting link 61 At this point, the part of the presser foot lifter rod 63 that protrudes to the left from the presser foot lifter link 61 is located on the lower side of the guide frame 23 and can abut against the guide frame 23. Specifically, when the motor shaft of the drive motor 40 rotates within the presser foot lifting range, the presser foot push rod 63 abuts and cooperates with the guide frame 23. At this time, when the drive motor 40 drives the drive crank 50 to rotate, the drive crank 50 passes through The presser foot lifting link 61 drives the presser foot push rod 63 to move up, and the presser foot push rod 63 pushes the guide frame 23 to move up together, and then drives the press rod 21 and the presser foot 22 to move up, thereby performing the presser foot lifting action. When the motor shaft of the drive motor 40 rotates within the online tension adjustment range, or when the manual presser foot clutch assembly 90 causes power transmission between the hand spanner 80 and the guide frame 23 (that is, when the presser foot is manually lifted), the pressure is lifted The foot push rod 63 is always located below the guide frame 23 and the two are separated. At this time, when the drive motor 40 drives the drive crank 50 to rotate, although the presser foot push rod 63 is moving, the presser foot push rod 63 never touches the guide. Therefore, the guide frame 23 maintains the current state, so that the presser foot lifting assembly 20 as a whole maintains the current state.
线张力调节离合组件70的优选结构为:如图5和图6所示,线张力调 节离合组件70包括安装在驱动曲柄50右端面上的滚轮71、具有第二固定摆动支点的驱动杠杆72、以及固定在夹线杆31上的连接接头73;滚轮71偏心于驱动曲柄50的转动中心;驱动杠杆72的上端具有杠杆驱动部721、下端开设有沿驱动杠杆72长度方向延伸的滑槽722;连接接头73包括接头本体部731、以及从接头本体部731的右端向右延伸出的连接轴部732,夹线杆31的前端固定在接头本体部731中,连接轴部732穿设在驱动杠杆72下端的滑槽722中、且两者滑动配合。当驱动电机40的电机轴在抬压脚范围内转动时,驱动杠杆72的杠杆驱动部721与滚轮71相分离,此时,驱动电机40带动驱动曲柄50转动时,驱动杠杆72不动作,故夹线杆31也不会移动、维持当前状态,使得夹线器30整体维持当前状态。当驱动电机40的电机轴在线张力调节范围内转动时,驱动杠杆72的杠杆驱动部721与滚轮71抵接配合,此时,驱动电机40带动驱动曲柄50转动时,驱动曲柄50通过滚轮71使驱动杠杆72绕其第二固定摆动支点转动,进而通过连接接头73驱动夹线杆31前移或右移,由此调节线张力、或使夹线器30执行夹线动作、或使夹线器30执行松线动作。The preferred structure of the wire tension adjustment clutch assembly 70 is: as shown in FIGS. 5 and 6, the wire tension adjustment clutch assembly 70 includes a roller 71 installed on the right end surface of the driving crank 50, a driving lever 72 with a second fixed swing fulcrum, And the connecting joint 73 fixed on the clamping rod 31; the roller 71 is eccentric to the rotation center of the driving crank 50; the upper end of the driving lever 72 has a lever driving portion 721, and the lower end is provided with a sliding groove 722 extending along the length of the driving lever 72; The connecting joint 73 includes a joint body portion 731 and a connecting shaft portion 732 extending from the right end of the joint body portion 731 to the right. The front end of the wire clamping lever 31 is fixed in the joint body portion 731, and the connecting shaft portion 732 penetrates the driving lever. In the sliding groove 722 at the lower end of 72, and the two are slidingly matched. When the motor shaft of the driving motor 40 rotates within the presser foot lifting range, the lever driving portion 721 of the driving lever 72 is separated from the roller 71. At this time, when the driving motor 40 drives the driving crank 50 to rotate, the driving lever 72 does not move, so The thread clamping lever 31 also does not move and maintains the current state, so that the thread clamping device 30 as a whole maintains the current state. When the motor shaft of the drive motor 40 rotates within the online tension adjustment range, the lever drive portion 721 of the drive lever 72 abuts and cooperates with the roller 71. At this time, when the drive motor 40 drives the drive crank 50 to rotate, the drive crank 50 is moved by the roller 71 The driving lever 72 rotates around its second fixed swing fulcrum, and then drives the thread clamping lever 31 to move forward or right through the connecting joint 73, thereby adjusting the thread tension, or causing the thread clamp 30 to perform the thread clamping action, or the thread clamp 30 Perform the thread loosening action.
较优地,如图5和图6所示,轴承的左端面上固定有一左右延伸的第二支撑销74,驱动杠杆72可转动地套装在该第二支撑销74上,该第二支撑销74构成驱动杠杆72的第二固定摆动支点。第二支撑销74还设有卡簧75,卡簧75和轴承相配合,在左右方向上对驱动杠杆72进行限位。夹线器30还包括固定于缝纫机机壳10的夹线座35,由此将夹线器30整体安装于缝纫机的机壳10;夹线杆31可前后移动地穿设在夹线座35中,夹线片32有两个、前后相对设置,两个夹线片32之间形成有夹线腔,位于前侧的夹线片32与夹线座35的前端面抵接,位于后侧的夹线片32与夹线弹簧33的后端抵接。Preferably, as shown in Figures 5 and 6, a second support pin 74 extending left and right is fixed on the left end surface of the bearing, and the driving lever 72 is rotatably sleeved on the second support pin 74. The second support pin 74 constitutes the second fixed swing fulcrum of the drive lever 72. The second support pin 74 is also provided with a circlip 75, which cooperates with the bearing to limit the driving lever 72 in the left-right direction. The thread clamp 30 also includes a thread clamp base 35 fixed to the sewing machine housing 10, whereby the thread clamp 30 is integrally installed in the sewing machine housing 10; the thread clamp rod 31 is movably inserted into the thread clamp base 35 , There are two clamping pieces 32, which are arranged front and back. A clamping cavity is formed between the two clamping pieces 32. The thread clamping piece 32 abuts against the rear end of the thread clamping spring 33.
进一步地,弹簧限位件34有下述两种实施例。弹簧限位件34实施例一、弹簧限位件34为一旋钮,旋钮和夹线杆31之间为分体结构、且两者间的连接方式有下述两种,方式一、两者固定连接,旋钮直接固定在夹线 杆31的后端,此时,只能通过驱动电机40自动调节线张力;方式二、两者螺纹连接,旋钮螺纹连接在弹簧限位件34,此时,除了通过驱动电机40自动调节线张力外,还可以手动转动旋钮来手动调节线张力。弹簧限位件34实施例二、弹簧限位件34为一帽檐部,该帽檐部一体地形成在夹线杆31的后端,即弹簧限位件34与夹线杆31之间为一体结构,此时,只能通过驱动电机40自动调节线张力。Further, the spring limit member 34 has the following two embodiments. The spring limiting member 34 embodiment 1. The spring limiting member 34 is a knob, and the knob and the wire clamping rod 31 are in a separate structure, and the connection between the two has the following two ways, the first way is to fix the two Connection, the knob is directly fixed on the back end of the thread clamping lever 31, at this time, the thread tension can only be automatically adjusted by the drive motor 40; Method two, the two are threaded, the knob is threaded to the spring limit piece 34, at this time, except In addition to automatically adjusting the thread tension by driving the motor 40, the thread tension can also be manually adjusted by manually turning the knob. The second embodiment of the spring limiting member 34. The spring limiting member 34 is a brim part which is integrally formed at the rear end of the wire clamping rod 31, that is, the spring limiting member 34 and the wire clamping rod 31 are an integral structure At this time, the thread tension can only be automatically adjusted by driving the motor 40.
手动抬压脚离合组件90的优选结构为:如图3所示,手动抬压脚离合组件90包括可转动地安装在缝纫机机壳10中的手提曲柄91、以及手提连杆92。手提曲柄91与手提扳手80固定相连。手提曲柄91的后端面上固定有一前后延伸的连接螺钉95,手提连杆92的上端开设有沿手提连杆92延伸方向延伸的连接滑槽921,连接螺钉95穿设在连接滑槽921中、且两者转动配合;当压脚22处于放下、下压的状态时,连接螺钉95与连接滑槽921的上端抵接、或略低于连接滑槽921的上端。手提连杆92的下端开设有安装孔922,导架23的前侧面上设有向前突出的连接凸部231,连接凸部231插装在安装孔922中、且两者转动配合。在自动抬压脚时,自动抬压脚离合组件60使驱动曲柄50和导架23之间有动力传递,导架23带动压杆21和压脚22上移,同时导架23也会驱动手提连杆92上移,手提连杆92的连接滑槽921相对于连接螺钉95上移,或者说,连接螺钉95在连接滑槽921中相对滑动,故在自动抬压脚时连接滑槽921提供了一段空行程,使得手提连杆92和手提曲柄91之间无动力传递,也就使手提扳手80和导架23之间无动力传递。在手动抬压脚时,转动手提扳手80,手提曲柄91随手提扳手80一起转动,手提曲柄91上的连接螺钉95上移,通过连接螺钉95与连接滑槽921上端的抵接驱动导架23上移,导架23带动压杆21和压脚22上移;但上述过程中,压脚22推杆始终位于导架23的下方,故导架23和压脚22推杆之间无动力传递,也就使导架23和驱动曲柄50之间无动力传递。The preferred structure of the manual presser foot lifting clutch assembly 90 is: as shown in FIG. 3, the manual presser foot lifting clutch assembly 90 includes a portable crank 91 rotatably installed in the sewing machine housing 10 and a portable connecting rod 92. The portable crank 91 is fixedly connected to the portable wrench 80. A connecting screw 95 extending forward and backward is fixed on the rear end of the portable crank 91. The upper end of the portable connecting rod 92 is provided with a connecting sliding groove 921 extending along the extending direction of the portable connecting rod 92. The connecting screw 95 is inserted in the connecting sliding groove 921. When the presser foot 22 is put down and pressed down, the connecting screw 95 abuts against the upper end of the connecting sliding groove 921, or is slightly lower than the upper end of the connecting sliding groove 921. A mounting hole 922 is opened at the lower end of the portable link 92, and a connecting protrusion 231 protruding forward is provided on the front side of the guide frame 23. The connecting protrusion 231 is inserted into the mounting hole 922 and the two are rotationally matched. When the presser foot is automatically lifted, the automatic presser foot clutch assembly 60 enables power transmission between the driving crank 50 and the guide frame 23, and the guide frame 23 drives the pressing rod 21 and the presser foot 22 to move up, and the guide frame 23 will also drive the portable The connecting rod 92 moves upward, and the connecting slide groove 921 of the portable connecting rod 92 moves upward relative to the connecting screw 95. In other words, the connecting screw 95 slides relatively in the connecting slide groove 921, so the connecting slide groove 921 is provided when the presser foot is automatically lifted. After a certain idle stroke, there is no power transmission between the portable connecting rod 92 and the portable crank 91, and thus no power transmission between the portable wrench 80 and the guide frame 23. When lifting the presser foot manually, turn the portable wrench 80, the portable crank 91 rotates with the portable wrench 80, the connecting screw 95 on the portable crank 91 moves upward, and the guide frame 23 is driven by the connecting screw 95 and the upper end of the connecting slide groove 921 abutting Move up, the guide frame 23 drives the press bar 21 and the presser foot 22 to move up; but in the above process, the presser foot 22 push rod is always under the guide frame 23, so there is no power transmission between the guide frame 23 and the presser foot 22 push rod Therefore, there is no power transmission between the guide frame 23 and the driving crank 50.
较优地,如图3所示,手提曲柄91和手提扳手80之间通过一前后延 伸的连接轴94相连,该连接轴94可转动地安装在缝纫机机壳10中,手提曲柄91固定在连接轴94的后端,手提扳手80固定在连接轴94的前端。如图7所示,手提扳手80背向缝纫机机壳10的前侧设有向远离缝纫机机壳10方向向前突出的转动操作部81,用户通过该转动操作部81能够方便地转动手提扳手80。连接滑槽921为一腰形槽,该腰形槽的上下两端都为圆弧段部。Preferably, as shown in FIG. 3, the portable crank 91 and the portable wrench 80 are connected by a connecting shaft 94 extending back and forth. The connecting shaft 94 is rotatably installed in the sewing machine housing 10, and the portable crank 91 is fixed in the connection At the rear end of the shaft 94, a hand spanner 80 is fixed to the front end of the connecting shaft 94. As shown in FIG. 7, the front side of the hand wrench 80 facing away from the sewing machine housing 10 is provided with a rotating operation part 81 protruding forwards away from the sewing machine housing 10, and the user can easily turn the hand wrench 80 through the rotating operation part 81 . The connecting sliding groove 921 is a waist-shaped groove, and both upper and lower ends of the waist-shaped groove are arc segments.
进一步地,如图3所示,手动抬压脚离合组件90还包括固定于缝纫机机壳10的限位销93,限位销93前后延伸,手提曲柄91上设有上抬限位面911和下压限位面912,限位销93位于上抬限位面911和下压限位面912之间,或者说,限位销93位于手提曲柄91中形成在上抬限位面911和下压限位面912之间的区域内。特别地,当限位销93与上抬限位面911抵接时,压脚22处于抬压脚状态,即通过限位销93与上抬限位面911的抵接配合在抬压脚时对手提曲柄91的转动形成限位,从而限位手提扳手80的转动;当限位销93与下压限位面912抵接时,压脚22处于下压状态,即通过限位销93与下压限位面912的抵接配合在放下压脚22时对手提曲柄91的转动形成限位,从而限位手提扳手80的转动。Further, as shown in FIG. 3, the manual presser foot lifting clutch assembly 90 also includes a limit pin 93 fixed to the sewing machine housing 10, the limit pin 93 extends forward and backward, and the portable crank 91 is provided with an upward lifting limit surface 911 and The lower pressure limit surface 912, the limit pin 93 is located between the upper lift limit surface 911 and the lower pressure limit surface 912, or in other words, the limit pin 93 is located in the portable crank 91 formed on the upper lift limit surface 911 and the lower limit surface 911 The area between the limit surfaces 912 is pressed. In particular, when the limit pin 93 is in contact with the upper limit surface 911, the presser foot 22 is in the state of lifting the presser foot, that is, when the limit pin 93 is in contact with the upper limit surface 911, The rotation of the portable crank 91 forms a limit, thereby limiting the rotation of the portable wrench 80; when the limit pin 93 is in contact with the downward pressure limit surface 912, the presser foot 22 is in a downward pressure state, that is, through the limit pin 93 and The abutment cooperation of the lower pressing limit surface 912 limits the rotation of the portable crank 91 when the presser foot 22 is lowered, thereby limiting the rotation of the portable wrench 80.
综上所述,具有上述结构的缝纫机的工作原理如下:In summary, the working principle of the sewing machine with the above structure is as follows:
缝纫机开机通电后,缝纫机的电控模块控制驱动电机40通电;缝纫机开始缝纫时,缝纫机的电控模块控制驱动电机40的输出转角为线张力调节范围内的一转角值,夹线弹簧33处于被压缩的状态,夹线弹簧33向后侧的夹线片32施加压力,由此使面线具有线张力。需要增大面线的线张力时,驱动电机40的电机轴逆时针转动,带动驱动曲柄50一起逆时针转动,使滚轮71后移,进而向后推动驱动杠杆72上端的杠杆驱动部721,则驱动杠杆72绕第二支撑销74顺时针摆动,通过连接接头73带动夹线杆31前移,夹线杆31带动其后端的弹簧限位件34一起前移,进一步压缩夹线弹簧33,夹线弹簧33对后侧夹线片32施加的压力增加,由此增加面线的线张力。需要减小面线的线张力、以及松线时,驱动电机40的电机轴顺时针 转动,带动驱动曲柄50一起顺时针转动,使滚轮71前移,则驱动杠杆72绕第二支撑销74逆时针摆动,通过连接接头73带动夹线杆31后移,夹线杆31带动其后端的弹簧限位件34一起后移,夹线弹簧33伸长,夹线弹簧33对后侧夹线片32施加的压力减小,由此减小面线的线张力。随着夹线杆31的继续后移,夹线弹簧33完全恢复到原始长度,则夹线片32施加于面线的夹线力为零,也即为夹线器30执行松线动作。之后,驱动电机40的电机轴继续顺时针转动,滚轮71脱离于驱动杠杆72上端的杠杆驱动部721,此后可开始进行抬压脚。After the sewing machine is powered on, the electrical control module of the sewing machine controls the drive motor 40 to energize; when the sewing machine starts sewing, the electrical control module of the sewing machine controls the output angle of the drive motor 40 to be a value within the thread tension adjustment range, and the thread tension spring 33 is in In the compressed state, the thread tension spring 33 applies pressure to the thread tension piece 32 on the rear side, thereby causing the upper thread to have thread tension. When the thread tension of the upper thread needs to be increased, the motor shaft of the driving motor 40 rotates counterclockwise, driving the driving crank 50 to rotate counterclockwise together, so that the roller 71 moves backward, and then the lever driving part 721 at the upper end of the driving lever 72 is pushed backward. The driving lever 72 swings clockwise around the second support pin 74, and the wire clamping lever 31 is driven to move forward through the connecting joint 73, and the wire clamping lever 31 drives the spring stopper 34 at the rear end thereof to move forward together to further compress the wire clamping spring 33 and clamp The pressure applied by the thread spring 33 to the rear thread clamping piece 32 increases, thereby increasing the thread tension of the upper thread. When it is necessary to reduce the thread tension of the upper thread and loosen the thread, the motor shaft of the driving motor 40 rotates clockwise, driving the driving crank 50 to rotate clockwise together, so that the roller 71 moves forward, and the driving lever 72 rotates backwards around the second support pin 74 When the hand swings, the thread clamping lever 31 is moved backward through the connecting joint 73, and the thread clamping lever 31 drives the spring stopper 34 at its rear end to move backward together. The thread clamping spring 33 extends, and the thread clamping spring 33 pairs the rear clamping piece 32. The applied pressure is reduced, thereby reducing the thread tension of the upper thread. As the thread clamping lever 31 continues to move backward, the thread clamping spring 33 is fully restored to its original length, and the thread clamping force applied to the upper thread by the thread clamping piece 32 is zero, that is, the thread clamping device 30 performs the thread loosening action. After that, the motor shaft of the driving motor 40 continues to rotate clockwise, the roller 71 is separated from the lever driving portion 721 at the upper end of the driving lever 72, and then the presser foot can be raised.
自动抬压脚时,驱动电机40的电机轴顺时针转动至抬压脚范围内的一转角值,此过程中,驱动曲柄50通过抬压脚连杆61驱动抬压脚推杆63上移,抬压脚推杆63与导架23抵接、推动导架23和压杆21上移,抬起压脚22;而手提连杆92上端的连接滑槽921相对于连接螺钉95向上滑移,连接螺钉95不动作。随着驱动电机40的电机轴在抬压脚范围内位于不同的角度,压脚22向上抬起的高度不相同,由此具有多个抬压脚高度。When the presser foot is automatically lifted, the motor shaft of the driving motor 40 rotates clockwise to a rotation angle value within the range of the presser foot. During this process, the drive crank 50 drives the presser foot lifter 63 to move upward through the presser foot connecting rod 61. The presser foot lifting push rod 63 abuts the guide frame 23, pushes the guide frame 23 and the pressing rod 21 to move up, and lifts the presser foot 22; and the connecting slide groove 921 at the upper end of the portable link 92 slides upward relative to the connecting screw 95, The connecting screw 95 does not move. As the motor shaft of the driving motor 40 is located at different angles within the range of lifting the presser foot, the lifting height of the presser foot 22 is not the same, thereby having multiple presser lifting heights.
图7所示的视图中,压脚22处于下压的状态,此时,压脚22压贴在缝纫机针板上,限位销93与下压限位面912抵接,连接螺钉95与连接滑槽921的上端抵接、或略低于连接滑槽921的上端。手动抬压脚时,将图7视图中的手提扳手80向上顺时针转动,如图8所示,手提扳手80带动手提曲柄91一起转动,固定在手提曲柄91上的连接螺钉95在连接滑槽921中上移;当连接螺钉95与连接滑槽921的上端抵接后,随着手提曲柄91带动连接螺钉95的继续上移,连接螺钉95通过手提连杆92带动导架23上移,导架23带动压杆21和压脚22一起上移;上述过程中,下压限位面912脱离于限位销93,而上抬限位面911靠近限位销93;最后,上抬限位面911与限位销93抵接,则手提曲柄91被止档,由此止档手提扳手80的转动,从而完成手动抬压脚的操作;而压脚22推杆始终在导架23的下方。手动将压脚22放下时,将图8视图中的手提扳手80向下逆时针转动,如图9所示,手提扳手80带动手提曲柄91一起转动,固定在手提曲 柄91上的连接螺钉95在连接滑槽921中下移;由于压脚22弹簧始终下压压杆21,由此使连接滑槽921的上端始终与连接螺钉95抵接,故连接螺钉95下移时,通过手提连杆92带动导架23下移,导架23带动压杆21和压脚22一起下移;上述过程中,上抬限位面911脱离于限位销93,而下压限位面912靠近限位销93;最后,下压限位面912与限位销93抵接,则手提曲柄91被止档,由此止档手提扳手80的转动,从而完成手动放下压脚22的操作。In the view shown in Figure 7, the presser foot 22 is in a state of being pressed down. At this time, the presser foot 22 is pressed against the needle plate of the sewing machine, the limit pin 93 abuts against the lower limit surface 912, and the connecting screw 95 is connected to The upper end of the sliding groove 921 abuts or is slightly lower than the upper end of the connecting sliding groove 921. When lifting the presser foot manually, turn the portable wrench 80 in the view of FIG. 7 upward and clockwise, as shown in FIG. 921 moves up; when the connecting screw 95 abuts the upper end of the connecting sliding groove 921, as the hand crank 91 drives the connecting screw 95 to move up, the connecting screw 95 drives the guide frame 23 to move up through the hand connecting rod 92, and guide The frame 23 drives the pressing rod 21 and the presser foot 22 to move upward together; in the above process, the downward pressure limit surface 912 is separated from the limit pin 93, and the upward limit surface 911 is close to the limit pin 93; finally, the limit is lifted upward When the surface 911 abuts the limit pin 93, the portable crank 91 is stopped, thereby stopping the rotation of the portable wrench 80, thereby completing the manual presser foot lifting operation; and the presser foot 22 push rod is always under the guide frame 23 . When the presser foot 22 is manually lowered, turn the portable wrench 80 in the view of FIG. 8 downward and counterclockwise. As shown in FIG. 9, the portable wrench 80 drives the portable crank 91 to rotate together, and the connecting screw 95 fixed on the portable crank 91 is at The connecting chute 921 is moved down; because the presser foot 22 spring always presses down the pressing rod 21, so that the upper end of the connecting chute 921 always abuts the connecting screw 95, so when the connecting screw 95 moves down, the connecting rod 92 is hand-held The guide frame 23 is driven to move down, and the guide frame 23 drives the pressing rod 21 and the presser foot 22 to move down together; in the above process, the upper limit surface 911 is separated from the limit pin 93, and the lower limit surface 912 is close to the limit pin 93; Finally, when the downward pressure limit surface 912 abuts the limit pin 93, the portable crank 91 is stopped, thereby stopping the rotation of the portable wrench 80, thereby completing the operation of manually lowering the presser foot 22.
因此,本申请通过缝纫机电控模块对驱动电机40的控制,能够进行夹线器30的夹线动作、松线动作、以及线张力调节,同时还能实现自动抬压脚、自动抬压脚时抬压脚高度的可控、以及手动抬压脚,压脚22抬起和放下时都不会产生撞击,降低缝纫机运行期间的噪音。Therefore, the present application controls the drive motor 40 through the sewing machine electronic control module, which can perform the thread clamping action, the thread loosening action, and the thread tension adjustment of the thread clamp 30, while also realizing automatic presser foot lifting and automatic presser foot lifting. The height of the presser foot is controllable and the presser foot is manually lifted. When the presser foot 22 is raised and lowered, there is no impact, which reduces the noise during the operation of the sewing machine.
综上所述,本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。In summary, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial value.
上述实施例仅例示性说明本发明的原理及其功效,而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下,对上述实施例进行修饰或改变。因此,举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变,仍应由本发明的权利要求所涵盖。The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present invention, but are not used to limit the present invention. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (10)

  1. 一种缝纫机,包括抬压脚组件(20),所述抬压脚组件(20)包括可上下移动的压杆(21)、安装在压杆(21)下端的压脚(22)、以及固定在压杆(21)上的导架(23),其特征在于:所述缝纫机还包括驱动源、由驱动源驱动转动的驱动曲柄(50)、连接在驱动曲柄(50)和导架(23)之间的自动抬压脚离合组件(60)、位于缝纫机机壳(10)外部的手提扳手(80)、以及连接在手提扳手(80)和导架(23)之间的手动抬压脚离合组件(90);A sewing machine includes a presser foot assembly (20). The presser foot assembly (20) includes a pressure rod (21) that can move up and down, a pressure foot (22) installed at the lower end of the pressure rod (21), and a fixed The guide frame (23) on the pressing rod (21) is characterized in that: the sewing machine further includes a driving source, a driving crank (50) driven to rotate by the driving source, connected to the driving crank (50) and the guide frame (23) ) The automatic presser foot lifting clutch assembly (60), the portable wrench (80) located on the outside of the sewing machine casing (10), and the manual presser foot lifter connected between the portable wrench (80) and the guide frame (23) Clutch assembly (90);
    当所述自动抬压脚离合组件(60)使驱动曲柄(50)和导架(23)之间有动力传递时,所述手动抬压脚离合组件(90)使手提扳手(80)和导架(23)之间无动力传递;When the automatic presser foot lifting clutch assembly (60) enables power transmission between the drive crank (50) and the guide frame (23), the manual presser foot lifting clutch assembly (90) makes the hand spanner (80) and the guide There is no power transmission between the frames (23);
    当所述手动抬压脚离合组件(90)使手提扳手(80)和导架(23)之间有动力传递时,所述自动抬压脚离合组件(60)使驱动曲柄(50)和导架(23)之间无动力传递。When the manual presser foot lifting clutch assembly (90) enables power transmission between the hand spanner (80) and the guide frame (23), the automatic presser foot lifting clutch assembly (60) drives the crank (50) and the guide There is no power transmission between the frames (23).
  2. 根据权利要求1所述的缝纫机,其特征在于:还包括夹线器(30)和线张力调节离合组件(70);所述夹线器(30)包括可轴向移动的夹线杆(31)、套装在夹线杆(31)上的夹线片(32)和夹线弹簧(33)、以及设置在夹线杆(31)上的弹簧限位件(34),所述夹线弹簧(33)的两端与夹线片(32)和弹簧限位件(34)抵接;所述张力调节离合组件连接在所述驱动曲柄(50)和夹线杆(31)之间;所述驱动源为一驱动电机(40),该驱动电机(40)的输出转角具有抬压脚范围和线张力调节范围;The sewing machine according to claim 1, characterized in that it further comprises a thread clamp (30) and a thread tension adjustment clutch assembly (70); the thread clamp (30) comprises an axially movable thread clamping rod (31) ), a wire clamping piece (32) and a wire clamping spring (33) sleeved on the wire clamping rod (31), and a spring limiter (34) arranged on the wire clamping rod (31), the wire clamping spring The two ends of (33) abut the wire clamping piece (32) and the spring limiter (34); the tension adjustment clutch assembly is connected between the drive crank (50) and the wire clamping lever (31); The driving source is a driving motor (40), and the output corner of the driving motor (40) has a presser foot lifting range and a wire tension adjustment range;
    当所述驱动电机(40)的电机轴在抬压脚范围内转动时,所述自动抬压脚离合组件(60)使驱动曲柄(50)和导架(23)之间有动力传递,所述线张力调节离合组件(70)使驱动曲柄(50)和夹线杆(31)之间无动力传递;When the motor shaft of the driving motor (40) rotates within the presser foot lifting range, the automatic presser foot lifting clutch assembly (60) enables power transmission between the driving crank (50) and the guide frame (23), so The thread tension adjustment clutch assembly (70) enables no power transmission between the driving crank (50) and the thread clamping lever (31);
    当所述驱动电机(40)的电机轴在线张力调节范围内转动时,所述自动抬压脚离合组件(60)使驱动曲柄(50)和导架(23)之间无动力传递, 所述线张力调节离合组件(70)使驱动曲柄(50)和夹线杆(31)之间有动力传递。When the motor shaft of the driving motor (40) rotates within the online tension adjustment range, the automatic presser foot lifting clutch assembly (60) causes no power transmission between the driving crank (50) and the guide frame (23), The thread tension adjusting clutch assembly (70) enables power transmission between the driving crank (50) and the thread clamping lever (31).
  3. 根据权利要求2所述的缝纫机,其特征在于:当所述驱动电机(40)的电机轴在抬压脚范围内转动时,所述夹线器(30)处于松线状态。The sewing machine according to claim 2, characterized in that: when the motor shaft of the driving motor (40) rotates within the range of lifting the presser foot, the thread clamp (30) is in a thread-releasing state.
  4. 根据权利要求2所述的缝纫机,其特征在于:所述自动抬压脚离合组件(60)包括抬压脚连杆(61)、具有第一固定摆动支点的抬压脚摇杆(62)、以及固定于抬压脚连杆(61)的抬压脚推杆(63),所述抬压脚连杆(61)的两端分别与驱动曲柄(50)和抬压脚摇杆(62)铰接、且抬压脚连杆(61)与驱动曲柄(50)的铰接点偏心于驱动曲柄(50)的转动中心;当所述驱动电机(40)的电机轴在抬压脚范围内转动时,所述抬压脚推杆(63)与导架(23)抵接配合;当所述手动抬压脚离合组件(90)使手提扳手(80)和导架(23)之间有动力传递时、或所述驱动电机(40)的电机轴在线张力调节范围内转动时,所述抬压脚推杆(63)位于导架(23)的下方、两者分离。The sewing machine according to claim 2, characterized in that: the automatic presser foot lifting clutch assembly (60) comprises a presser foot lifting link (61), a presser foot lifting rocker (62) with a first fixed swing fulcrum, And a presser foot push rod (63) fixed to the presser foot lifting link (61), the two ends of the presser foot lifting link (61) are respectively connected with the drive crank (50) and the presser foot rocker (62) The hinge point of the presser foot lifting connecting rod (61) and the driving crank (50) is eccentric to the rotation center of the driving crank (50); when the motor shaft of the driving motor (40) rotates within the presser foot lifting range , The presser foot lifting push rod (63) is in contact with the guide frame (23); when the manual presser foot lifting clutch assembly (90) enables power transmission between the hand spanner (80) and the guide frame (23) When or when the motor shaft of the driving motor (40) rotates within the online tension adjustment range, the presser foot lifting push rod (63) is located below the guide frame (23) and the two are separated.
  5. 根据权利要求2所述的缝纫机,其特征在于:所述线张力调节离合组件(70)包括安装在驱动曲柄(50)上的滚轮(71)、具有第二固定摆动支点的驱动杠杆(72)、以及固定在夹线杆(31)上的连接接头(73),所述驱动杠杆(72)的一端具有杠杆驱动部(721)、另一端开设有沿驱动杠杆(72)长度方向延伸的滑槽(722),所述连接接头(73)上具有连接轴部(732),所述连接轴部(732)穿设在滑槽(722)中、两者滑动配合;当所述驱动电机(40)的电机轴在抬压脚范围内转动时,所述驱动杠杆(72)的杠杆驱动部(721)与滚轮(71)相分离;当所述驱动电机(40)的电机轴在线张力调节范围内转动时,所述驱动杠杆(72)的杠杆驱动部(721)与滚轮(71)抵接配合。The sewing machine according to claim 2, characterized in that: the thread tension adjusting clutch assembly (70) comprises a roller (71) mounted on a driving crank (50), and a driving lever (72) with a second fixed swing fulcrum , And a connecting joint (73) fixed on the clamping rod (31), one end of the driving lever (72) has a lever driving portion (721), and the other end is provided with a slide extending along the length of the driving lever (72) Groove (722), the connecting joint (73) is provided with a connecting shaft portion (732), the connecting shaft portion (732) passes through the sliding groove (722), and the two slidingly cooperate; when the driving motor ( When the motor shaft of 40) rotates within the range of lifting the presser foot, the lever driving part (721) of the driving lever (72) is separated from the roller (71); when the motor shaft of the driving motor (40) is adjusted online When rotating within the range, the lever driving portion (721) of the driving lever (72) abuts and fits with the roller (71).
  6. 根据权利要求2所述的缝纫机,其特征在于:所述夹线器(30)还包括固定于缝纫机机壳(10)的夹线座(35),所述夹线杆(31)可移动地穿设在夹线座(35)中,所述夹线片(32)有两个、且两个夹线片(32)之间形成有夹线腔,其中一个夹线片(32)与所述夹线座(35)抵接、另一个夹线片(32)与所述夹线弹簧(33)抵接。The sewing machine according to claim 2, characterized in that: the thread clamp (30) further comprises a thread clamp seat (35) fixed to the sewing machine housing (10), and the thread clamp rod (31) is movably Threaded in the clamping seat (35), there are two clamping pieces (32), and a clamping cavity is formed between the two clamping pieces (32), one of the clamping pieces (32) is connected to the The wire clamping seat (35) abuts, and the other wire clamping piece (32) abuts the wire clamping spring (33).
  7. 根据权利要求2所述的缝纫机,其特征在于:所述弹簧限位件(34)为一旋钮,所述旋钮与夹线杆(31)之间为分体结构,所述夹线杆(31)与旋钮固定连接或螺纹连接。The sewing machine according to claim 2, characterized in that: the spring limiting member (34) is a knob, and the knob and the thread clamping rod (31) are in a separate structure, and the thread clamping rod (31) )Fixed connection or threaded connection with the knob.
  8. 根据权利要求2所述的缝纫机,其特征在于:所述弹簧限位件(34)为一帽檐部,所述帽檐部一体地形成在所述夹线杆(31)上。The sewing machine according to claim 2, characterized in that the spring limiting member (34) is a brim portion, and the brim portion is integrally formed on the thread clamping rod (31).
  9. 根据权利要求1所述的缝纫机,其特征在于:所述手动抬压脚离合组件(90)包括可转动地安装在缝纫机机壳(10)中的手提曲柄(91)、以及手提连杆(92);所述手提曲柄(91)与手提扳手(80)固定相连;所述手提曲柄(91)上固定有一连接螺钉(95),所述手提连杆(92)的一端开设有沿手提连杆(92)延伸方向延伸的连接滑槽(921),所述连接螺钉(95)穿设在连接滑槽(921)中、且两者转动配合;所述手提连杆(92)的另一端与导架(23)相连;The sewing machine according to claim 1, characterized in that: the manual presser foot lifting clutch assembly (90) comprises a portable crank (91) rotatably installed in the sewing machine housing (10), and a portable connecting rod (92) ); The portable crank (91) and the portable wrench (80) are fixedly connected; the portable crank (91) is fixed with a connecting screw (95), and one end of the portable connecting rod (92) is provided with a connecting rod along the (92) A connecting chute (921) extending in the extending direction, the connecting screw (95) is inserted in the connecting chute (921) and the two are rotatingly matched; the other end of the portable connecting rod (92) is The guide frame (23) is connected;
    当所述自动抬压脚离合组件(60)使驱动曲柄(50)和导架(23)之间有动力传递时,所述连接螺钉(95)在连接滑槽(921)中滑动;When the automatic presser foot lifting clutch assembly (60) enables power transmission between the driving crank (50) and the guide frame (23), the connecting screw (95) slides in the connecting slide groove (921);
    当所述手动抬压脚离合组件(90)使手提扳手(80)和导架(23)之间有动力传递时,所述连接螺钉(95)与连接滑槽(921)的端部抵接。When the manual presser foot lifting clutch assembly (90) enables power transmission between the hand wrench (80) and the guide frame (23), the connecting screw (95) abuts against the end of the connecting chute (921) .
  10. 根据权利要求9所述的缝纫机,其特征在于:所述手动抬压脚离 合组件(90)还包括固定于缝纫机机壳(10)的限位销(93),所述手提曲柄(91)上设有上抬限位面(911)和下压限位面(912),所述限位销(93)位于上抬限位面(911)和下压限位面(912)之间;当所述限位销(93)与上抬限位面(911)抵接时,所述压脚(22)处于抬压脚状态;当所述限位销(93)与下压限位面(912)抵接时,所述压脚(22)处于下压状态。The sewing machine according to claim 9, characterized in that: the manual presser foot lifting clutch assembly (90) further comprises a limit pin (93) fixed to the sewing machine housing (10), the portable crank (91) An upward lifting limit surface (911) and a downward pressure limiting surface (912) are provided, and the limit pin (93) is located between the upward lifting limit surface (911) and the downward pressure limiting surface (912); when When the limit pin (93) abuts against the upper limit surface (911), the presser foot (22) is in the state of lifting the presser foot; when the limit pin (93) and the lower limit surface ( 912) When abutting, the presser foot (22) is in a pressed state.
PCT/CN2020/107003 2020-05-15 2020-08-05 Sewing machine WO2021227264A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246856A (en) * 1979-07-13 1981-01-27 The Singer Company Presser foot lift operable independently by manual or power devices
CN205501597U (en) * 2016-03-31 2016-08-24 浙江杜马缝纫机股份有限公司 Presser foot lifting device of sewing machine
CN107237055A (en) * 2017-08-09 2017-10-10 浙江中捷缝纫科技有限公司 A kind of presser foot of sewing machine
CN110923967A (en) * 2019-12-23 2020-03-27 杰克缝纫机股份有限公司 Sewing machine trimming and thread loosening pressure foot lifting device and sewing machine
CN110983643A (en) * 2019-12-23 2020-04-10 杰克缝纫机股份有限公司 Sewing machine thread trimming and loosening lifting presser foot and presser foot pressure adjusting method

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005261630A (en) * 2004-03-18 2005-09-29 Brother Ind Ltd Thread tension device for sewing machine
JP5265217B2 (en) * 2008-02-22 2013-08-14 Juki株式会社 Sewing machine lifting device
JP2015160115A (en) * 2014-02-28 2015-09-07 ブラザー工業株式会社 sewing machine
CN106637727B (en) * 2016-11-30 2022-03-04 西安标准工业股份有限公司 Electronic control wire tension upper thread end stabilizing mechanism and control method thereof
CN207143456U (en) * 2017-09-12 2018-03-27 杰克缝纫机股份有限公司 Foot lifting mechanism and sewing machine
CN206721469U (en) * 2017-09-30 2017-12-08 东莞市寮步江龙针车有限公司 A kind of sewing machine of more presser feets
CN208183275U (en) * 2018-04-26 2018-12-04 浙江翔科缝纫机股份有限公司 A kind of sewing machine
CN210031085U (en) * 2019-03-18 2020-02-07 浙江翔科缝纫机股份有限公司 Sewing machine and lift presser foot thread loosening mechanism
CN110219101A (en) * 2019-03-18 2019-09-10 浙江翔科缝纫机股份有限公司 A kind of sewing machine and presser foot lifter thread releasing mechanism
CN109837662A (en) * 2019-04-07 2019-06-04 杰克缝纫机股份有限公司 A kind of thread-trimming lifter-presser foot mechanism and sewing machine
CN110983645B (en) * 2019-12-23 2021-07-30 杰克缝纫机股份有限公司 Sewing machine and device for adjusting pressure of thread trimming and loosing presser foot of sewing machine
CN111074441A (en) * 2020-01-24 2020-04-28 台州市福崎缝纫机有限公司 Thread trimming or presser foot lifting driving mechanism of sewing machine and thread trimming and presser foot lifting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246856A (en) * 1979-07-13 1981-01-27 The Singer Company Presser foot lift operable independently by manual or power devices
CN205501597U (en) * 2016-03-31 2016-08-24 浙江杜马缝纫机股份有限公司 Presser foot lifting device of sewing machine
CN107237055A (en) * 2017-08-09 2017-10-10 浙江中捷缝纫科技有限公司 A kind of presser foot of sewing machine
CN110923967A (en) * 2019-12-23 2020-03-27 杰克缝纫机股份有限公司 Sewing machine trimming and thread loosening pressure foot lifting device and sewing machine
CN110983643A (en) * 2019-12-23 2020-04-10 杰克缝纫机股份有限公司 Sewing machine thread trimming and loosening lifting presser foot and presser foot pressure adjusting method

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