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CN-224227406-U - Facial line tension and tangent control device

CN224227406UCN 224227406 UCN224227406 UCN 224227406UCN-224227406-U

Abstract

The utility model belongs to the technical field of sewing machines, and discloses an upper thread tension and thread cutting control device which comprises a thread cutting control stepping motor, wherein an output shaft of the thread cutting control stepping motor is connected with a track cam, a thread cutting crank transmission mechanism is connected with a track groove on the end face of the track cam in a matched manner and slides along the track groove, the thread cutting mechanism is connected with one end, far away from the track cam, of the thread cutting crank transmission mechanism, a thread clamping crank transmission mechanism is connected with a track groove on the outer circumferential face of the track cam in a matched manner and slides along the track groove, a thread clamping mechanism is connected with the thread clamping crank transmission mechanism, the thread cutting control stepping motor is started, and the thread cutting crank transmission mechanism and the thread clamping crank transmission mechanism drive the corresponding thread cutting mechanism and the thread clamping mechanism to operate respectively to perform corresponding thread cutting and thread clamping operation. According to the utility model, by arranging one motor and simultaneously controlling the wire clamping and cutting actions, more accurate control is realized, one motor is reduced, and the control cost is effectively reduced.

Inventors

  • FANG SHENGHUA
  • BI JINLIANG

Assignees

  • 上海富山精密机械科技有限公司

Dates

Publication Date
20260512
Application Date
20250528

Claims (5)

  1. 1. A facial line tension and tangent control device is characterized in that the device comprises, The output shaft of the wire cutting control stepping motor is connected with a track cam; The tangential crank transmission mechanism is connected with the track groove of the end surface of the track cam in a matched manner and slides along the track groove; The tangential mechanism is connected with one end, far away from the track cam, of the tangential crank transmission mechanism; the wire clamping crank transmission mechanism is connected with the track groove on the outer peripheral surface of the track cam in a matched manner and slides along the track groove; The wire clamping mechanism is connected with the wire clamping crank transmission mechanism; The thread cutting control stepping motor is started, and the thread cutting crank transmission mechanism and the thread clamping crank transmission mechanism drive the corresponding thread cutting mechanism and the thread clamping mechanism to operate, so that corresponding thread cutting and clamping operations are performed.
  2. 2. The facial line tension and tangent control device as defined in claim 1, wherein the tangent crank drive mechanism comprises an upper cutter crank shaft, a ball is provided at one end of the upper cutter crank shaft, the ball is engaged with the track cam track groove and slides along the track groove, a lower cutter crank is provided at one end of the upper cutter crank shaft near the track cam, the lower cutter crank is hinged with a shaft at one end of the upper cutter crank shaft near the track cam, the shaft at one end of the upper cutter crank shaft far from the track cam is hinged with the lower cutter crank shaft and the upper cutter crank, and the other ends of the lower cutter crank shaft and the upper cutter crank are connected with an upper cutter connecting rod, which is connected with the cutter mechanism.
  3. 3. The upper thread tension and thread cutting control device as claimed in claim 2, wherein the cutter mechanism comprises an upper cutter frame hinged with one of the cutter links, the upper cutter frame is hinged with an upper cutter, the other upper cutter link is hinged with a lower cutter frame, the lower cutter frame is hinged with a lower cutter, the upper cutter frame and the lower cutter frame are also rotatably connected with the oil pump shaft sleeve, the upper cutter is connected with the lower cutter and the needle plate, the upper cutter and the lower cutter respectively move towards the center of the needle, and the thread cutting edge parts of the upper cutter and the lower cutter overlap at the position close to the center of the needle to cut.
  4. 4. A needle thread tension and thread cutting control device as claimed in any one of claims 1 to 3, wherein the thread clamping crank transmission mechanism comprises a first thread clamping crank, one end of the first thread clamping crank is provided with a ball, the ball slides along a Zhou Guiji groove outside the track cam, the other end of the first thread clamping crank is connected with a thread clamping driving shaft parallel to a rotating shaft of the thread cutting control stepping motor, a second thread clamping crank is hinged at the far end of the thread clamping driving shaft, a first thread clamping shaft sleeve is arranged at the joint of the first thread clamping crank and the second thread clamping crank, the second thread clamping crank is hinged with a thread clamping transmission connecting rod, the other end of the thread clamping driving rod is vertically upwards arranged, one end of the thread clamping transmission shaft parallel to the thread clamping driving shaft is connected with the second thread clamping crank, the other end of the thread clamping transmission shaft is connected with a third thread clamping crank, the third thread clamping crank is hinged with a thread clamping connecting rod, the thread clamping connecting rod is hinged with a thread clamping adapter, and the thread clamping adapter is connected with the thread clamping mechanism.
  5. 5. The apparatus of claim 4, wherein the thread clamping mechanism comprises a thread clamping screw with one end connected with the thread clamping adapter, the thread clamping screw sequentially penetrates through the thread clamping seat, the thread clamping plate, the thread picking spring and the outer cover to form the thread clamping mechanism, and the thread clamping transmission shaft swings under the action of external force to push the thread clamping adapter to move along the thread clamping screw towards the thread clamping seat until opposite surfaces are attached, and the thread clamping is performed through the thread clamping plate.

Description

Facial line tension and tangent control device Technical Field The utility model belongs to the technical field of sewing machines, and particularly relates to an upper thread tension and tangent control device. Background The existing sewing machine mainly adopts an electromagnet or two motors as a power source to respectively control the thread clamping and cutting actions, and has the defects that 1) the electromagnet is adopted for driving, the action speed and the stroke are invariable, the noise is large, 2) the two motors are adopted for respectively controlling the thread clamping and cutting actions, and the control cost is high. Disclosure of utility model The present utility model is directed to solving the above problems and providing an upper thread tension and thread cutting control device. In order to achieve the above purpose, the utility model provides a technical scheme that an upper thread tension and tangent control device comprises, The output shaft of the wire cutting control stepping motor is connected with a track cam; The tangential crank transmission mechanism is connected with the track groove of the end surface of the track cam in a matched manner and slides along the track groove; The tangential mechanism is connected with one end, far away from the track cam, of the tangential crank transmission mechanism; the wire clamping crank transmission mechanism is connected with the track groove on the outer peripheral surface of the track cam in a matched manner and slides along the track groove; The wire clamping mechanism is connected with the wire clamping crank transmission mechanism; The thread cutting control stepping motor is started, and the thread cutting crank transmission mechanism and the thread clamping crank transmission mechanism drive the corresponding thread cutting mechanism and the thread clamping mechanism to operate, so that corresponding thread cutting and clamping operations are performed. According to the utility model, the tangential crank transmission mechanism further comprises an upper cutter crank shaft, one end of the upper cutter crank shaft is provided with a ball, the ball is matched with a track cam track groove and slides along the track groove, one end of the upper cutter crank shaft, which is close to the track cam, is provided with a lower cutter crank, the lower cutter crank is hinged with a shaft, which is close to one end of the upper cutter crank shaft, one end, which is far away from the track cam, of the upper cutter crank shaft is hinged with the lower cutter crank shaft and the upper cutter crank, the other ends of the lower cutter crank shaft and the upper cutter crank are connected with an upper cutter connecting rod, and the upper cutter connecting rod is connected with the cutter mechanism. According to the utility model, the cutter mechanism comprises an upper cutter rest hinged with one cutter connecting rod, the upper cutter rest is hinged with an upper cutter, the other upper cutter connecting rod is hinged with a lower cutter rest, the lower cutter rest is hinged with the lower cutter, the upper cutter rest and the lower cutter rest are also in rotary connection with an oil pump shaft sleeve, the upper cutter is connected with the lower cutter and a needle plate, the upper cutter and the lower cutter respectively move towards the center of the needle, and the tangential cutting edge parts of the upper cutter and the lower cutter overlap and are tangential at the position close to the center of the needle. According to the utility model, the wire clamping crank transmission mechanism further comprises a first wire clamping crank, one end of the first wire clamping crank is provided with a ball, the ball slides along a Zhou Guiji groove outside the track cam, the other end of the first wire clamping crank is connected with a wire clamping driving shaft parallel to a rotating shaft of the wire cutting control stepping motor, the far end of the wire clamping driving shaft is hinged with a second wire clamping crank, a first wire clamping shaft sleeve is arranged at the joint of the two wire clamping cranks, the second wire clamping crank is hinged with a wire clamping transmission connecting rod, the wire clamping transmission rod is vertically upwards arranged, the other end of the wire clamping transmission rod is hinged with another second wire clamping crank, one end of the wire clamping transmission shaft parallel to the wire clamping driving shaft is connected with the second wire clamping crank, the other end of the wire clamping transmission shaft is connected with a third wire clamping crank, the third wire clamping crank is hinged with the wire clamping connecting rod, the wire clamping connecting rod is hinged with the wire clamping adapter, and the wire clamping adapter is connected with the wire clamping mechanism. According to the utility model, the wire clamping mechanism comprises a wire clamping screw rod, one end of t