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CN-224227408-U - Stitch length adjusting structure and sewing machine

CN224227408UCN 224227408 UCN224227408 UCN 224227408UCN-224227408-U

Abstract

The utility model relates to a stitch length adjusting structure and a sewing machine. The needle distance adjusting structure comprises a main shaft and a machine shell, wherein a cloth feeding eccentric wheel assembly is sleeved on the main shaft, an open needle eccentric cam on the cloth feeding eccentric wheel assembly is elastically abutted to a ratchet wheel along the axial direction, the ratchet wheel is fixed on the main shaft and meshed with an open needle eccentric cam tooth, the main shaft is rotatably arranged in the machine shell, a main shaft motor, a linear driving assembly and a controller are fixed on the machine shell, the main shaft motor is in transmission connection with the main shaft, the driving end of the linear driving assembly penetrates the machine shell and can be meshed with the open needle eccentric cam tooth, the main shaft motor and the linear driving assembly are in signal connection with the controller, and the sewing machine adopts the needle distance adjusting structure. The stitch length adjusting structure and the sewing machine can realize automatic stitch length adjustment, are not limited by angles, and the cloth feeding eccentric wheel assembly can directly adjust the stitch length at any angle without rotating the main shaft to a specified angle, so that the adjustment is convenient.

Inventors

  • LIN JING
  • QIU LI
  • ZHENG JI

Assignees

  • 杰克科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (10)

  1. 1. The utility model provides a needle pitch adjusting structure, its characterized in that includes main shaft (1) and casing (2), cup joint on main shaft (1) and be provided with feed eccentric wheel subassembly (3), open needle eccentric cam (301) and ratchet (302) on feed eccentric wheel subassembly (3) are along axial elasticity butt, ratchet (302) are fixed on main shaft (1) and with open needle eccentric cam (301) tooth engagement, main shaft (1) rotationally set up in casing (2), be fixed with spindle motor, sharp drive assembly (4) and controller on casing (2), spindle motor with main shaft (1) transmission connection, the drive end of sharp drive assembly (4) penetrate casing (2) and can with open needle eccentric cam (301) tooth engagement, spindle motor with sharp drive assembly (4) all with controller signal connection.
  2. 2. The needle pitch adjusting structure according to claim 1, wherein a pawl positioning sleeve (401) is arranged at the driving end of the linear driving assembly (4), a radially-through accommodating groove is formed in the open needle eccentric cam (301), a pawl abutting block (303) is clamped in the accommodating groove, meshing teeth capable of being matched with the ratchet wheel (302) and the pawl positioning sleeve (401) are arranged on the pawl abutting block (303), and the ratchet wheel (302) is elastically abutted with the pawl abutting block (303) along the axial direction.
  3. 3. The needle pitch adjusting structure according to claim 2, wherein a pressure spring (5) is sleeved on the main shaft (1), the pressure spring (5) is located between the pawl abutting block (303) and the open needle eccentric cam (301), an inner ring meshing tooth and an outer ring meshing tooth are arranged on the pawl abutting block (303), the inner ring meshing tooth is used for being matched with the ratchet wheel (302), and the outer ring meshing tooth is used for being matched with the pawl positioning sleeve (401).
  4. 4. The needle pitch adjusting structure according to claim 2, wherein two pawl abutment blocks (303) are symmetrically arranged in the accommodating groove, each pawl abutment block (303) is hinged on the open needle eccentric cam (301) through a connecting rod (6), a torsion spring (7) is sleeved on the connecting rod (6), and the torsion spring (7) is simultaneously abutted against the pawl abutment block (303) and the open needle eccentric cam (301).
  5. 5. The gauge needle adjusting structure according to claim 1, wherein the feed eccentric wheel assembly (3) comprises a feed eccentric wheel (304), a sleeve joint eccentric wheel (305) and a feed connecting rod (306), the feed eccentric wheel (304) is fixed on the main shaft (1), the sleeve joint eccentric wheel (305) is connected with the feed eccentric wheel (304) and sleeved on the open needle eccentric cam (301), and the feed connecting rod (306) is sleeved on the sleeve joint eccentric wheel (305).
  6. 6. The gauge length adjustment structure of claim 5, characterized in that a needle bearing (8) is provided between the cup-jointed eccentric (305) and the feed link (306).
  7. 7. The gauge needle adjusting structure according to claim 1, wherein the linear driving assembly (4) is an electromagnet, and a linear telescopic rod (402) of the electromagnet penetrates the casing (2) and can be engaged with the open needle eccentric cam (301) in a tooth manner.
  8. 8. The stitch length adjusting structure according to claim 1, wherein a control panel with a password locking function is fixed on the housing (2), and the control panel is in signal connection with the controller.
  9. 9. The gauge needle adjusting structure of claim 1, wherein the controller is in signal connection with a remote internet of things control system.
  10. 10. A sewing machine, characterized in that the stitch length adjusting structure as claimed in any one of claims 1 to 9 is employed.

Description

Stitch length adjusting structure and sewing machine Technical Field The utility model relates to the technical field of sewing equipment, in particular to a stitch length adjusting structure and a sewing machine adopting the stitch length adjusting structure. Background When the traditional sewing machine is used for adjusting the needle distance, the needle distance is needed to be manually pressed, the needle distance is always kept pressed by hands in the needle distance adjusting process, and the needle distance is adjusted only by rotating to a corresponding angle, so that the adjustment is inconvenient. Meanwhile, in the sewing process, the sewing speed is increased by a sewing worker, so that the stitch length is privately increased, and the stitch length of the garment is slightly high and is not uniform. While CN206545102U discloses an automatic stitch length adjusting device for a sewing machine, the device can drive the ejector rod to automatically extend into the casing by the operating component, so that an operator does not need to press the ejector rod all the time when adjusting the stitch length, but the operating component in the scheme is arranged on the casing on one radial side of the main shaft, and the ejector rod needs to be inserted into a radial notch of the stitch length adjusting wheel and pushed away from the internal tooth locking block to adjust the stitch length, which results in that the automatic stitch length adjusting device for the sewing machine can only adjust the stitch length when the main shaft rotates to a certain angle, and the adjustment is still inconvenient. Meanwhile, the arrangement position of the operation assembly also occupies the operation space of a sewing worker, and the normal operation of the sewing work is affected. In addition, the automatic stitch length adjusting device of the sewing machine does not consider the related design of the lock stitch length, and cannot avoid that a sewing worker privately adjusts the stitch length, so that the sewing quality of clothes is not uniform. Disclosure of utility model In order to solve the technical problems, the utility model provides a needle distance adjusting structure convenient to adjust and a sewing machine. The utility model adopts the following technical scheme: The utility model provides a needle distance adjusting structure which comprises a main shaft and a machine shell, wherein a cloth feeding eccentric wheel assembly is sleeved on the main shaft, a needle opening eccentric cam on the cloth feeding eccentric wheel assembly is elastically abutted against a ratchet wheel along the axial direction, the ratchet wheel is fixed on the main shaft and meshed with a needle opening eccentric cam tooth, the main shaft is rotatably arranged in the machine shell, a main shaft motor, a linear driving assembly and a controller are fixed on the machine shell, the main shaft motor is in transmission connection with the main shaft, the driving end of the linear driving assembly penetrates the machine shell and can be meshed with the needle opening eccentric cam tooth, and the main shaft motor and the linear driving assembly are in signal connection with the controller. Preferably, a pawl positioning sleeve is arranged on the driving end of the linear driving assembly, a radially through accommodating groove is formed in the open needle eccentric cam, a pawl abutting block is clamped in the accommodating groove, meshing teeth which can be matched with the ratchet wheel and the pawl positioning sleeve are arranged on the pawl abutting block, and the ratchet wheel is elastically abutted with the pawl abutting block along the axial direction. Preferably, the main shaft is sleeved with a pressure spring, the pressure spring is positioned between the pawl abutting block and the open needle eccentric cam, the pawl abutting block is provided with an inner ring meshing tooth and an outer ring meshing tooth, the inner ring meshing tooth is used for being matched with the ratchet wheel, and the outer ring meshing tooth is used for being matched with the pawl positioning sleeve. Preferably, two pawl butt blocks are symmetrically arranged in the accommodating groove, each pawl butt block is hinged on the open needle eccentric cam through a connecting rod, a torsion spring is sleeved on the connecting rod, and the torsion spring is simultaneously in butt joint with the pawl butt block and the open needle eccentric cam. Preferably, the cloth feeding eccentric wheel assembly comprises a cloth feeding eccentric wheel, a sleeving eccentric wheel and a feeding connecting rod, wherein the cloth feeding eccentric wheel is fixed on the main shaft, the sleeving eccentric wheel is connected with the cloth feeding eccentric wheel and sleeved on the open-needle eccentric cam, and the feeding connecting rod is sleeved on the sleeving eccentric wheel. Preferably, a needle bearing is arranged between the sleeved eccentric wheel and the f