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CN-120591968-B - Sewing machine cloth pressing mechanism and sewing machine

CN120591968BCN 120591968 BCN120591968 BCN 120591968BCN-120591968-B

Abstract

The invention relates to the technical field of sewing machines, and discloses a cloth pressing mechanism of a sewing machine and the sewing machine, wherein the cloth pressing mechanism comprises a presser foot bar and a needle bar, the lower end part of the presser foot bar is provided with a presser foot, and the presser foot bar is provided with an adjusting component for adjusting the pressure and the lifting height of the presser foot; the adjusting assembly comprises an adjusting box, an adjusting rod is inserted at the upper end part of the presser foot bar, an adjusting block sleeved on the presser foot bar and the needle bar is further arranged in the adjusting box, a first adjusting piece is further arranged in the adjusting box, a second adjusting piece is further arranged in the adjusting box, a driving piece extending out of the adjusting box is arranged on the adjusting box, a clutch piece is arranged in the adjusting box, and the driving piece is switched through the clutch piece to realize independent work of the first adjusting piece or the second adjusting piece. Through the switching of clutch for the driving piece can drive first regulating part and second regulating part work alone, thereby make when carrying out the pressure of presser foot or lifting the altitude to adjust, need not to carry out the dismantlement operation of end cover, thereby be convenient for in-service use.

Inventors

  • Xu Nanjin
  • Lv Tuwan
  • Du Qingan
  • Lu Tangxiong
  • Li Zhangshe

Assignees

  • 浙江南远缝纫设备有限公司

Dates

Publication Date
20260512
Application Date
20250723

Claims (6)

  1. 1. A cloth pressing mechanism of a sewing machine comprises a presser foot bar (110) and a needle bar (120) which are arranged in a machine head (20) in parallel, wherein a detachable presser foot (100) is arranged at the lower end part of the presser foot bar (110), and the cloth pressing mechanism is characterized in that an adjusting component for adjusting the pressure and the lifting height of the presser foot (100) is arranged on the presser foot bar (110); The adjusting assembly comprises an adjusting box (130), an adjusting rod (200) penetrating through the adjusting box (130) is inserted into the upper end of the presser foot bar (110), the adjusting assembly further comprises an adjusting block (140) sleeved on the presser foot bar (110) and the needle bar (120), a first adjusting piece used for driving the presser foot bar (110) and the adjusting block (140) to integrally lift is arranged in the adjusting box (130), and a second adjusting piece used for driving the adjusting block (140) to lift along the presser foot bar (110) is also arranged in the adjusting box (130); The adjusting box (130) is provided with a driving piece extending out of the adjusting box, a clutch piece is arranged in the adjusting box (130), and the driving piece is switched by the clutch piece to realize independent work of a first adjusting piece or a second adjusting piece, wherein the first adjusting piece comprises a baffle ring (201) arranged outside an adjusting rod (200), and a first spring (210) which is abutted on a presser foot bar (110) is sleeved outside the adjusting rod (200) positioned below the baffle ring (201); The clutch part comprises an upper rotating cylinder (220) and a lower rotating cylinder (230) which are rotatably arranged in the adjusting box (130), the adjusting rod (200) is arranged in a threaded penetrating way through the upper rotating cylinder (220) and the lower rotating cylinder (230), a connecting part (522) which is in threaded connection with the adjusting rod (200) is arranged in the lower rotating cylinder (230), the lower rotating cylinder (230) rotates to drive the adjusting rod (200) to lift, the driving part comprises a driving ring (240) which is sleeved outside the adjusting rod (200) and is positioned on the upper rotating cylinder (220) and the lower rotating cylinder (230), a screwing column (241) which penetrates through the adjusting box (130) is arranged on the driving ring (240), and driving ratchets (511) are arranged on the upper side and the lower side of the driving ring (240); the second adjusting piece comprises a loop bar (150) which is rotatably arranged on the adjusting block (140) and sleeved outside the adjusting rod (200), the lower end part of the loop bar (150) is in threaded connection with the outer side wall of the presser foot bar (110), and the upper end part of the loop bar (150) is provided with a gear column (151); The upper rotary cylinder (220) is provided with gears (531) on the outer side wall, rotating shafts (310) which are positioned on two sides of the upper rotary cylinder (220) and the lower ends of which extend out of the adjusting box (130) are arranged in the adjusting box (130), the rotating shafts (310) are provided with first driven gears (311) meshed with the gears (531), the lower ends of the rotating shafts (310) are provided with second driven gears (312) meshed with the gear columns (151), and the lower side wall of the upper rotary cylinder (220) is provided with upper driven ratchets (532) matched with corresponding driving ratchets (511).
  2. 2. The cloth pressing mechanism of a sewing machine according to claim 1, wherein the lower end of the presser bar (110) is provided with a mounting groove (711), and the presser bar (100) is mounted in the mounting groove (711) by a screw.
  3. 3. The cloth pressing mechanism of the sewing machine of claim 2, wherein the presser foot (100) comprises a presser foot handle (810) and a presser foot plate (820), the presser foot plate (820) is provided with a hinge groove (821), the lower end of the presser foot handle (810) extends into the hinge groove (821), a hinge shaft penetrating through the presser foot handle (810) is arranged in the hinge groove (821), and the presser foot handle (810) is provided with an adjusting component for adjusting the dip angle of the presser foot plate (820).
  4. 4. A cloth pressing mechanism of a sewing machine according to claim 3, wherein the presser foot handle (810) is internally provided with a mounting cavity (811) with an opening at the lower end, the adjusting assembly comprises a sliding block (840) arranged in the mounting cavity (811) through a second spring (830), the lower end of the sliding block (840) forms a hinge part, one end of the hinge part is provided with a hinge rod (850) hinged on the hinge part, the other end of the hinge rod (850) is hinged in the hinge groove (821), and the presser foot handle (810) is provided with an adjusting piece for driving the sliding block (840) to lift.
  5. 5. A cloth pressing mechanism of a sewing machine according to claim 4, wherein a groove (911) is provided on one side surface of the slider (840), a guide surface (912) is formed on one side wall of the groove (911), the regulating member comprises a screwing nail (920) screwed on the presser foot handle (810), one end of the screwing nail (920) extends into the groove (911) and cooperates with the guide surface (912), and the screwing nail (920) extends into the groove (911) for pressing the guide surface (912) to move up the slider (840).
  6. 6. A sewing machine comprises a machine body, a machine base (10) and a machine head (20) arranged on the machine base (10), wherein the machine base (10) and the machine head (20) can be overturned and arranged on the upper side surface of the machine body, and the sewing machine is characterized in that a cloth pressing mechanism is arranged in the machine head (20), and the cloth pressing mechanism adopts the cloth pressing mechanism according to any one of claims 1-5.

Description

Sewing machine cloth pressing mechanism and sewing machine Technical Field The invention relates to the technical field of sewing machines, in particular to a cloth pressing mechanism of a sewing machine and the sewing machine. Background A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on a fabric such that one or more layers of fabric are interwoven or stitched together. The sewing machine mainly comprises a machine head, a machine seat, a transmission part and an accessory part, wherein the machine head is a main part of the sewing machine and comprises a cloth pressing mechanism. Currently, a cloth pressing mechanism in a sewing machine on the market is usually a presser foot mechanism, the presser foot mechanism mainly comprises a presser foot bar and a presser foot arranged at the lower end of the presser foot bar, and the presser foot is matched with a cloth feeding tooth in the sewing machine to realize the backward cloth feeding in the sewing process. When the lifting height and pressure of the presser foot are adjusted, the end cover on the machine head is required to be detached to expose the presser foot mechanism in the machine head, at the moment, an operator can adjust the presser foot bar through a tool, the operation is troublesome, the debugging is required to be repeated, and the normal work of the sewing machine is influenced, and time and labor are wasted. Disclosure of Invention The invention aims to provide a cloth pressing mechanism of a sewing machine and the sewing machine, so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: the cloth pressing mechanism of the sewing machine comprises a presser foot bar and a needle bar which are arranged in parallel in a machine head, wherein a detachable presser foot is arranged at the lower end part of the presser foot bar, and an adjusting component for adjusting the pressure and the lifting height of the presser foot is arranged on the presser foot bar; The adjusting assembly comprises an adjusting box, an adjusting rod penetrating through the adjusting box is inserted into the upper end of the presser foot rod, the adjusting assembly further comprises an adjusting block sleeved on the presser foot rod and the needle rod, a first adjusting piece used for driving the presser foot rod and the adjusting block to integrally lift is arranged in the adjusting box, and a second adjusting piece used for driving the adjusting block to lift along the presser foot rod is further arranged in the adjusting box; the adjusting box is provided with a driving piece extending through the adjusting box, a clutch piece is arranged in the adjusting box, and the driving piece is switched through the clutch piece to realize independent work of the first adjusting piece or the second adjusting piece. Further, the first adjusting piece comprises a baffle ring arranged outside the adjusting rod, and a first spring which is abutted on the presser foot rod is arranged outside the adjusting rod below the baffle ring; The clutch piece comprises an upper rotating cylinder and a lower rotating cylinder which are rotatably arranged in the adjusting box, the adjusting rod threads penetrate through the upper rotating cylinder and the lower rotating cylinder, a connecting part in threaded connection with the adjusting rod is arranged in the lower rotating cylinder, and the lower rotating cylinder rotates to drive the adjusting rod to lift. Further, the driving piece comprises a driving ring sleeved outside the adjusting rod and positioned on the upper rotating cylinder and the lower rotating cylinder, a screwing column extending out of the adjusting box is arranged on the driving ring, and driving ratchets are arranged on the upper side and the lower side of the driving ring; The upper end part of the lower rotary cylinder is provided with a lower driven ratchet matched with the corresponding driving ratchet. Further, the second adjusting piece comprises a loop bar rotatably arranged on the adjusting block and sleeved outside the adjusting rod, the lower end part of the loop bar is in threaded connection with the outer side wall of the presser foot bar, and the upper end part of the loop bar is provided with a gear column; The gear is arranged on the outer side wall of the upper rotating cylinder, a rotating shaft which is positioned on two sides of the upper rotating cylinder and the lower end of which extends out of the adjusting box is arranged in the adjusting box, a first driven gear meshed with the gear is arranged on the rotating shaft, and a second driven gear meshed with the gear column is arranged at the lower end of the rotating shaft. Further, an upper driven ratchet matched with the corresponding driving ratchet is arranged on the lower side wall of the upper rotating cylinder. Further, the lower end of the pre