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CN-121992583-A - Sewing machine feeding tooth adjusting device and sewing machine

CN121992583ACN 121992583 ACN121992583 ACN 121992583ACN-121992583-A

Abstract

The application provides a feeding tooth adjusting device of a sewing machine and the sewing machine, wherein the feeding tooth adjusting device of the sewing machine comprises a bottom plate, a lifting tooth shaft, a tooth frame, a feeding tooth, a lifting tooth crank, a lifting tooth connecting rod, a lifting tooth adjusting eccentric pin and a lifting tooth adjusting knob, the lifting tooth crank is fixed on the lifting tooth shaft, the lifting tooth adjusting eccentric pin comprises a first shaft part and a second shaft part which are eccentrically arranged, the first shaft part is in rotary fit with the lifting tooth crank and is fixed with the lifting tooth adjusting knob, the second shaft part is in rotary fit with one end of the lifting tooth connecting rod, the other end of the lifting tooth connecting rod is hinged with the tooth frame, a plurality of adjusting positioning grooves and telescopic adjusting positioning pieces are respectively arranged on the lifting tooth crank and the lifting tooth adjusting knob, when the lifting tooth adjusting knob is rotated, the lifting tooth adjusting eccentric pin synchronously rotates along with the lifting tooth adjusting knob, the relative position between the second shaft part and the lifting tooth connecting rod is changed, and the adjusting positioning piece is moved out from the current adjusting positioning groove and clamped into the other adjusting positioning groove. The application is convenient for a driver to easily and conveniently adjust the height of the feeding teeth.

Inventors

  • XU WEISHUN
  • GUAN JIANPING
  • HONG ZHIMIN
  • XU JUNHUI

Assignees

  • 杰克科技股份有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (9)

  1. 1. The feeding tooth adjusting device of the sewing machine comprises a bottom plate (10) fixedly arranged, a tooth lifting shaft (20) rotatably supported in the bottom plate (10), a tooth frame (30), a feeding tooth (40) fixed on the tooth frame (30) and a tooth lifting transmission adjusting unit connected between the tooth lifting shaft (20) and the tooth frame (30) in a transmission mode, and is characterized by comprising a tooth lifting crank (50), a tooth lifting connecting rod (60), a tooth lifting adjusting eccentric pin (70) and a tooth lifting adjusting knob (80), wherein the tooth lifting crank (50) is fixed on the tooth lifting shaft (20), the tooth lifting adjusting eccentric pin (70) comprises a first shaft part (71) and a second shaft part (72) which are eccentrically arranged, the first shaft part (71) is in rotary fit with the tooth lifting crank (50) and is fixed with the tooth lifting adjusting knob (80), the second shaft part (72) is in rotary fit with one end of the tooth lifting connecting rod (60), and the other end of the tooth lifting connecting rod (60) is hinged with the tooth frame (30); The lifting tooth crank (50) and the lifting tooth adjusting knob (80) are characterized in that a plurality of adjusting positioning grooves (51) are formed in the end face of one of the lifting tooth crank and the lifting tooth adjusting knob, the adjusting positioning grooves (51) are circumferentially distributed at intervals, an adjusting positioning piece (90) which is telescopic along the direction approaching or far away from the adjusting positioning groove (51) is arranged on the end face of the other lifting tooth crank, and the adjusting positioning piece (90) is clamped in one adjusting positioning groove (51); When the lifting tooth adjusting knob (80) is rotated, the lifting tooth adjusting eccentric pin (70) synchronously rotates along with the lifting tooth adjusting knob (80), the relative position between the second shaft part (72) and the lifting tooth connecting rod (60) is changed, and the adjusting positioning piece (90) moves out of the current adjusting positioning groove (51) and is clamped into the other adjusting positioning groove (51).
  2. 2. The feeding tooth adjusting device of the sewing machine according to claim 1, wherein the adjusting and positioning groove (51) is provided with three channels, the three channels of the adjusting and positioning groove (51) are respectively a conventional gear groove (52), a high gear groove (53) and a low gear groove (54), the high gear groove (53) and the low gear groove (54) are distributed on two sides of the conventional gear groove (52), and the height of the feeding tooth (40) corresponding to the high gear groove (53), the height of the feeding tooth (40) corresponding to the conventional gear groove (52) and the height of the feeding tooth (40) corresponding to the low gear groove (54) are gradually reduced.
  3. 3. The feeding tooth adjusting device for a sewing machine according to claim 1 or 2, wherein the lifting tooth adjusting knob (80) is abutted against one side of the lifting tooth crank (50) along the extending direction of the lifting tooth adjusting eccentric pin (70), a plurality of adjusting positioning grooves (51) are formed in the end face of the lifting tooth crank (50), and the adjusting positioning piece (90) is retractably mounted on the end face of the lifting tooth adjusting knob (80).
  4. 4. The feeding tooth adjusting device for a sewing machine according to claim 3, wherein the feeding tooth transmission adjusting unit further comprises a positioning pin (110), the positioning pin (110) comprises a shell (111) fixed in the feeding tooth adjusting knob (80), a spring (112) accommodated in the shell (111), and a positioning bead (113) arranged at an opening of the shell (111), two ends of the spring (112) are respectively abutted against the shell (111) and the positioning bead (113), and the positioning bead (113) forms the adjusting positioning piece (90).
  5. 5. The feeding tooth adjusting device for a sewing machine according to claim 1, wherein the lifting tooth crank (50) comprises a crank main body part (55) and a pair of crank arm parts (56) extending from the crank main body part (55), one end of the lifting tooth connecting rod (60) is abutted between the pair of crank arm parts (56), the first shaft part (71) is provided with two sections, the two sections of the first shaft part (71) are respectively rotatably penetrated in the pair of crank arm parts (56), and the second shaft part (72) is connected between the two sections of the first shaft part (71).
  6. 6. The feeding tooth adjusting device of the sewing machine according to claim 1, further comprising a push plate assembly (120), wherein a spanner part (81) is fixedly arranged on the lifting tooth adjusting knob (80), an adjusting opening groove (101) and push plate sliding grooves (102) arranged on two sides of the adjusting opening groove (101) are arranged on the bottom plate (10), the push plate assembly (120) is movably assembled in the push plate sliding grooves (102), and the push plate assembly (120) can open or close the adjusting opening groove (101); When the adjustment opening groove (101) is opened, the wrench part (81) is exposed in the adjustment opening groove (101).
  7. 7. The feeding tooth adjusting device for a sewing machine according to claim 1, wherein a plurality of fastening screws (130) are screwed in the lifting tooth adjusting knob (80), the first shaft portion (71) is arranged in the lifting tooth adjusting knob (80) in a penetrating manner, and the end portions of the fastening screws (130) are abutted to the periphery of the first shaft portion (71).
  8. 8. The feeding tooth adjusting device of the sewing machine according to claim 1, wherein the tooth frame (30) is riveted with a rivet (140), and the rivet (140) is penetrated in the tooth lifting connecting rod (60) and is in rotating fit with the tooth lifting connecting rod (60).
  9. 9. A sewing machine, wherein the sewing machine is equipped with the feed dog adjustment device of any one of claims 1 to 8.

Description

Sewing machine feeding tooth adjusting device and sewing machine Technical Field The invention relates to the technical field of sewing machines, in particular to a feeding tooth adjusting device of a sewing machine and the sewing machine provided with the feeding tooth adjusting device of the sewing machine. Background The flat seaming machine used in the sewing industry is provided with a feed lifting mechanism and a feed feeding mechanism, wherein the feed lifting mechanism mainly comprises a feed lifting shaft rotatably assembled in a bottom plate of the sewing machine, a feed lifting fork-shaped crank fixedly locked on the feed lifting shaft through a screw, and a feed lifting sliding block in sliding fit with a sliding groove of the feed lifting fork-shaped crank, the feed lifting sliding block is hinged with a feed rack through an axial screw, and feed feeding teeth are fixed on the feed rack. In the running process of the lockstitch sewing machine, the tooth lifting mechanism drives the tooth frame and the feeding teeth to reciprocate up and down, so that the feeding teeth are exposed from the upper surface of the needle plate and are propped against the lower surface of the fabric, and the feeding mechanism is combined with the tooth frame and the feeding teeth to reciprocate back and forth so as to push the fabric to move on the upper surface of the needle plate. Generally, different heights of the feeding teeth, which are exposed out of the upper surface of the needle plate, can adapt to different sewing working conditions. The existing flush joint can distinguish a thin material machine type and a thick material machine type, one of the main difference points of the thin material machine type and the thick material machine type is that the heights of the feeding teeth exposed out of the upper surface of the needle plate are different, and the heights of the feeding teeth in the thick material machine type, which are higher than the heights of the feeding teeth in the thin material machine type, are larger than the heights of the feeding teeth in the thick material machine type, which are higher than the heights of the feeding teeth in the thick material machine type. Therefore, the compaction degree of the feeding teeth of the thick material machine type on the fabric is deeper, and stronger cloth feeding capability can be provided. In the sewing field, as the demands of the market for clothes are diversified, the trend of small sheets, quick return and diversified sewing materials is presented, so that users need to change money frequently. Money changes, which generally mean changes in garment materials, result in the need for frequent adjustment of the sewing machine by the user to accommodate new material sewing. The thickness of the fabric is changed, and a user is usually required to adjust the height of a feeding tooth in the sewing machine higher than the surface of the needle plate to adapt to the sewing working condition. When a user sews fabrics with different thicknesses and materials, the angle of the fork-shaped crank of the lifting tooth needs to be adjusted, so that the height of the feeding tooth is adjusted. The adjusting operation is that the machine head is turned over, then the screw for fixing the fork-shaped crank of the lifting tooth is unscrewed with great force, and then the upper and lower positions of the fork-shaped crank of the lifting tooth on the lifting tooth shaft are adjusted to approximately adjust the height of the feeding tooth. The operation of adjusting the height of the feeding teeth basically has no big problem for machine repair in a clothing factory, but the number of machine repair in the clothing factory is limited and cannot be handled in time, so that a driver in the clothing factory is required to adjust the feeding teeth. However, clothing factories and lathes mainly use females, have small strength, have great difficulty in turning over the head of the sewing machine and unscrewing the screws for fixing the fork-shaped crank of the feed dog, have few tools while the lathes are still hand, and have no clear concept on how much the height of the feed dog is adjusted by the lathes. Finally, when the height of the feeding teeth is required to be adjusted by a turner to adapt to sewing after money exchange, the turner is required to wait for standby repair operation due to troublesome adjustment, and the work efficiency of a clothing factory is affected. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a feeding tooth adjusting device for a sewing machine, which can adjust the height of a feeding tooth conveniently. In order to achieve the above purpose, the invention provides a feeding tooth adjusting device of a sewing machine, which comprises a bottom plate, a tooth lifting shaft, a tooth frame, a feeding tooth and a tooth lifting transmission adjusting unit, wherei