CN217536349U

CN217536349U - Double-cam cloth feeding mechanism of sewing machine

Info

Publication number: CN217536349U
Application number: CN202221690598.8U
Authority: CN
Inventors: 陈良育; 苏瑞华
Original assignee: Zhongshan Gangyuan Technology Corp
Current assignee: Zhongshan Gangyuan Technology Corp
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-10-04
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a sewing machine's two cam work feed mechanisms, including the sewing machine body, this internal lower shaft mechanism and the work feed subassembly of being equipped with of sewing machine, lower shaft mechanism includes the transmission shaft, the work feed subassembly includes pinion rack mounting bracket, first work feed gear, second work feed gear, first pivot and second pivot, this is internal for sewing machine is located to first pivot and the parallel interval of second pivot, and the second pivot is located the below of first pivot, first work feed gear is equipped with first cam, second work feed gear is equipped with the second cam, the side direction of pinion rack mounting bracket is equipped with first mounting hole and the second mounting hole that corresponds respectively with first cam and second cam, be equipped with on the transmission shaft along with transmission shaft pivoted drive gear, drive gear is connected with first work feed gear and second work feed gear meshing respectively. The utility model discloses a when two cams, syntropy rotate, guaranteed the stability that work feed pinion rack goes up and down and remove.

Description

Double-cam cloth feeding mechanism of sewing machine

Technical Field

The utility model relates to a sewing machine technical field, concretely relates to sewing machine's two cam work feed mechanisms.

Background

Sewing machines are widely used in the apparel industry, and are machines that form one or more stitches in a work piece with one or more sewing threads to interlace or stitch together one or more layers of the work piece. The sewing process of the sewing machine is actually a feeding and sewing process by the cooperation of the cloth feeding toothed plate, the presser foot and the machine needle. When the sewing machine starts to sew, cloth is placed under a presser foot to be sewn, the presser foot descends to contact and press the cloth, a cloth feeding toothed plate is lifted to the bottom surface of the cloth, the presser foot and the cloth feeding toothed plate synchronously move relatively to engage the cloth, meanwhile, a machine needle follows the presser foot to synchronously reach the surface of the cloth, and the machine needle drives an upper thread to penetrate the cloth and carries out knotting action with a lower thread; then, the presser foot and the cloth feeding toothed plate simultaneously carry out backward feeding action, the machine needle retreats rhythmically along with the cloth and is accompanied by a rhythmic needle inserting, and the machine needle and a hook needle of the rotating shuttle jointly complete sewing of the upper thread and the bottom thread to realize sewing. When feeding is finished, the presser foot is lifted to be separated from the cloth, the cloth feeding toothed plate is lowered to be separated from the lower end face of the cloth, meanwhile, the needle is lifted to be separated from the cloth, and feeding actions of sewing equipment are called as three-synchronous sewing. The mode that adopts single cam cooperation guide structure during current sewing machine work feed drives the work feed pinion rack activity, and such work feed mode structure is complicated, the equipment of being not convenient for, and the poor stability of work feed moreover leads to the work feed easily and makes up the asynchronous condition, reduces the quality of making up of product.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the disappearance that prior art exists, provide a sewing machine's two cam work feed mechanisms, its work feed structure that can simplify sewing machine improves the stability of work feed pinion rack, guarantees the quality of making up of product.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sewing machine's two cam work feed mechanisms, includes the sewing machine body, this internal lower shaft mechanism and work feed subassembly of being equipped with of sewing machine, lower shaft mechanism includes the transmission shaft and drives pivoted shuttle core subassembly by the transmission shaft, the work feed subassembly includes pinion rack mounting bracket, first work feed gear, second work feed gear, first pivot and second pivot, this is internal that sewing machine is located to first pivot and the parallel interval of second pivot, and the second pivot is located the below of first pivot, first work feed gear is connected with first pivot rotation to first work feed gear and the coaxial setting of first pivot, second work feed gear rotates with the second pivot to be connected to second work feed gear and the coaxial setting of second pivot, first work feed gear face is equipped with the first cam with first pivot eccentric settings to one side of pinion rack, second work feed gear face is equipped with the second cam with the eccentric settings of second pivot to one side of mounting bracket, the upper end of pinion rack is equipped with work feed gear side direction mounting bracket and the first cam gear mounting bracket and the second cam gear mounting bracket and the first cam gear side direction mounting bracket and the second cam mounting hole that meshes with first cam respectively with first cam, the mounting bracket and first cam gear mounting hole, the first cam gear and the second cam installation hole are equipped with first cam along with the first cam installation hole, the installation hole is located respectively. The utility model discloses an adopt double cam synchronous drive's mode control pinion rack mounting bracket to reach the seesaw from top to bottom, need not increase guide structure, simplified the work feed structure, reduced the manufacturing cost of equipment, improved sewing machine's packaging efficiency, when simultaneously through double cam, the syntropy rotates, has guaranteed the stability that the work feed pinion rack goes up and down and remove, has improved the quality of making up of goods.

Preferably, the first cam and the second cam have the same eccentric direction.

As a preferable scheme, the first positioning convex ring is arranged at the opening edge of one side of the first mounting hole facing the first cloth feeding gear, the first cloth feeding gear is provided with a first positioning groove corresponding to the first positioning convex ring at the peripheral side of the first cam, and the first positioning convex ring is rotatably embedded in the first positioning groove during assembly.

As a preferable scheme, the second positioning convex ring is arranged at the opening edge of one side of the second mounting hole facing the second cloth feeding gear, a second positioning groove corresponding to the second positioning convex ring is arranged on the second cloth feeding gear at the peripheral side of the second cam, and the second positioning convex ring is rotatably embedded in the second positioning groove during assembly.

Through setting up the location bulge loop to the left and right directions of pinion rack mounting bracket is fixed a position in the cooperation of accessible location bulge loop and constant head tank, prevents that the pinion rack mounting bracket from taking place the condition of side to side beat in the course of the work, further improves work feed precision and work feed stability.

Preferably, the gear ratios of the transmission gear to the first cloth feeding gear and the second cloth feeding gear are both 15:30.

as a preferred scheme, the pinion rack mounting bracket includes the horizontal mounting panel of level setting and the vertical mounting panel of vertical setting, the upper end of vertical mounting panel is located to the horizontal mounting panel, first mounting hole and second mounting hole are located on the vertical mounting panel.

Preferably, the transverse mounting plate and the longitudinal mounting plate are integrally connected.

Preferably, the first cam and the second cam are both arranged in a cylindrical shape, and the diameters of the first cam and the second cam are the same.

As a preferred scheme, the cloth feeding assembly further comprises a toothed plate mounting plate, the cloth feeding toothed plate is fixedly arranged on the toothed plate mounting plate, and the toothed plate mounting plate is detachably mounted on the transverse mounting plate through screws. Through locating the cloth feeding toothed plate on the toothed plate mounting plate, the toothed plate mounting plate is mounted on the transverse mounting plate in a detachable mode, so that the cloth feeding toothed plate can be conveniently disassembled, replaced or maintained.

Preferably, a first fixing hole is provided on a peripheral side of the first rotating shaft, the first rotating shaft is fixedly mounted in the sewing machine body by screwing a screw through the first fixing hole and the threaded hole, a second fixing hole is provided on a peripheral side of the second rotating shaft, and the second rotating shaft is fixedly mounted in the sewing machine body by screwing a screw through the second fixing hole and the threaded hole.

As an optimal scheme, the cloth feeding assembly further comprises a first limiting ring and a second limiting ring, one end of the first rotating shaft, which is close to the toothed plate mounting frame, is provided with a first baffle ring, one end of the second rotating shaft, which is close to the toothed plate mounting frame, is provided with a second baffle ring, during assembly, the first limiting ring is arranged at one end, which is far away from the first cloth feeding gear, of the first mounting hole, the first baffle ring is arranged at one side, which is far away from the first cloth feeding gear, of the first limiting ring, the second limiting ring is arranged at one end, which is far away from the second cloth feeding gear, of the second mounting hole, and the second baffle ring is arranged at one side, which is far away from the second cloth feeding gear, of the second limiting ring. Through setting up the spacing ring to can with the fender ring cooperation, spacing the pinion rack mounting bracket between spacing ring and work feed gear, make the cam inlay all the time in the mounting hole that corresponds.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, through adopting double cam synchronous drive's mode control pinion rack vertical and back-and-forth movement, need not increase guide structure, simplified the work feed structure, reduced the manufacturing cost of equipment, improved sewing machine's packaging efficiency, when simultaneously through double cam, the syntropy rotates, has guaranteed work feed pinion rack lift and the stability of removal, has improved the quality of making up of goods.

To more clearly illustrate the structural features and technical means of the present invention and the specific objects and functions achieved thereby, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

drawings

FIG. 1 is an assembly diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic view of an assembly structure of the cloth feeding assembly according to the embodiment of the present invention;

FIG. 4 is an exploded view of the cloth feeding assembly according to the embodiment of the present invention;

fig. 5 is a side view of the first and second feed gears according to the embodiment of the present invention.

The attached drawings indicate the following:

10. lower shaft mechanism 11, transmission shaft 12 and shuttle peg assembly

13. Transmission gear 20, cloth feeding assembly 21 and toothed plate mounting frame

211. Transverse mounting plate 212, longitudinal mounting plate 213 and first mounting hole

214. A second mounting hole 215, a first positioning convex ring 216 and a second positioning convex ring

22. A first feeding gear 221, a first cam 222, a first positioning groove

23. A second cloth feeding gear 231, a second cam 232, a second positioning groove

24. First rotating shaft 241, first retaining ring 242 and first fixing hole

25. A second shaft 251, a second retaining ring 252, and a second fixing hole

26. Toothed plate mounting plate 27, cloth feeding toothed plate 28 and first limiting ring

29. Second spacing ring 100, sewing machine body.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1 to 5, a double-cam cloth feeding mechanism of a sewing machine includes a sewing machine body 100, a lower shaft mechanism 10 and a cloth feeding assembly 20 are provided in the sewing machine body 100, the lower shaft mechanism 10 includes a transmission shaft 11 and a bobbin assembly 12 driven by the transmission shaft 11 to rotate, the cloth feeding assembly 20 includes a rack mounting frame 21, a first cloth feeding gear 22, a second cloth feeding gear 23, a first rotating shaft 24 and a second rotating shaft 25, the first rotating shaft 24 and the second rotating shaft 25 are provided in the sewing machine body 100 at a parallel interval, the second rotating shaft 25 is located below the first rotating shaft 24, the first cloth feeding gear 22 is rotatably connected to the first rotating shaft 24, the first cloth feeding gear 22 and the first rotating shaft 24 are coaxially disposed, the second cloth feeding gear 23 and the second rotating shaft 25 are rotatably connected, the second cloth feeding gear 23 and the second rotating shaft 25 are coaxially disposed, a first cloth feeding gear 22 and a second rotating shaft 221 eccentrically disposed with the first rotating shaft 24 are provided on a side of the first cloth feeding gear 22 facing the first rotating frame 21, a cam mounting hole 231 and a cam mounting hole 213 corresponding to the first mounting frame 11 are provided on a side of the second rotating shaft 23, and a cam mounting hole 213 are provided on a side of the first mounting frame 11 and a cam mounting frame 11, and a cam mounting hole 231 corresponding mounting hole 231. In the present invention, the eccentric directions of the first cam 221 and the second cam 231 are the same. The gear ratios of the transmission gear 13 to the first feeding gear 22 and the second feeding gear 23 are all 15:30. the first cam 221 and the second cam 231 are both arranged in a cylindrical shape, and the diameters of the first cam 221 and the second cam 231 are the same, so that when the cams rotate to the highest position, the cloth feeding toothed plate 27 can keep a certain retention time, and the cloth feeding precision is improved.

Specifically, the first positioning convex ring 215 is disposed on the opening edge of the first mounting hole 213 facing the first feeding gear 22, the first feeding gear 22 is disposed with a first positioning groove 222 corresponding to the first positioning convex ring 215 on the periphery of the first cam 221, and the first positioning convex ring 215 is rotatably embedded in the first positioning groove 222 during assembly.

A second positioning convex ring 216 is arranged at the opening edge of one side of the second mounting hole 214 facing the second cloth feeding gear 23, a second positioning groove 232 corresponding to the second positioning convex ring 216 is arranged at the peripheral side of the second cam 231 of the second cloth feeding gear 23, and the second positioning convex ring 216 is rotatably embedded in the second positioning groove 232 during assembly.

Through setting up the location bulge loop to the left and right directions of pinion rack mounting bracket 21 is fixed a position in the cooperation of accessible location bulge loop and constant head tank, prevents that pinion rack mounting bracket 21 from taking place the condition of side to side beat in the course of the work, further improves work feed precision and work feed stability.

The utility model discloses in, pinion rack mounting bracket 21 includes horizontal mounting panel 211 that the level set up and the vertical mounting panel 212 of vertical setting, the upper end of vertical mounting panel 212 is located to horizontal mounting panel 211, first mounting hole 213 and second mounting hole 214 are located on vertical mounting panel 212. The transverse mounting plate 211 and the longitudinal mounting plate 212 are integrally formed and connected.

Specifically, the cloth feeding assembly 20 further comprises a toothed plate mounting plate 26, the cloth feeding toothed plate 27 is fixedly arranged on the toothed plate mounting plate 26, and the toothed plate mounting plate 26 is detachably mounted on the transverse mounting plate 211 through screws. Through locating work feed pinion rack 27 on pinion rack mounting panel 26, the pinion rack mounting panel 26 is installed on horizontal mounting panel 211 to the rethread is removable, thereby can conveniently tear open and trade or maintain work feed pinion rack 27.

The peripheral side of the first rotating shaft 24 is provided with a first fixing hole 242 which penetrates through the first rotating shaft, the first rotating shaft 24 is screwed and fixedly installed in the sewing machine body 100 through a screw which penetrates through the first fixing hole 242 and a threaded hole, the peripheral side of the second rotating shaft 25 is provided with a second fixing hole 252 which penetrates through the second rotating shaft 25, and the second rotating shaft 25 is screwed and fixedly installed in the sewing machine body 100 through a screw which penetrates through the second fixing hole 252 and a threaded hole.

The cloth feeding assembly 20 further comprises a first limiting ring 28 and a second limiting ring 29, one end of the first rotating shaft 24 close to the toothed plate mounting frame 21 is provided with a first baffle ring 241, one end of the second rotating shaft 25 close to the toothed plate mounting frame 21 is provided with a second baffle ring 251, during assembly, the first limiting ring 28 is arranged at one end of the first mounting hole 213 far away from the first cloth feeding gear 22, the first rotating shaft 24 sequentially penetrates through the shaft hole of the first limiting ring 28, the first mounting hole 213 and the shaft hole of the first cloth feeding gear 22 and then is fixed in the sewing machine body 100, the first baffle ring 241 is blocked at one side of the first limiting ring 28 far away from the first cloth feeding gear 22, the second limiting ring 29 is arranged at one end of the second mounting hole 214 far away from the second cloth feeding gear 23, the second rotating shaft 25 sequentially penetrates through the shaft hole of the second limiting ring 29, the second mounting hole 214 and the shaft hole of the second cloth feeding gear 23 and then is fixed in the sewing machine body 100, and the second baffle ring 251 is blocked at one side of the second limiting ring 29 far away from the second cloth feeding gear 23. Through setting up the spacing ring to can with the fender ring cooperation, spacing pinion rack mounting bracket 21 between spacing ring and work feed gear, make the cam inlay all the time in the mounting hole that corresponds.

To sum up, the utility model discloses, through adopting double cam synchronous drive's mode control pinion rack up-and-down and swing back and forth, need not increase guide structure, simplified the work feed structure, reduced the manufacturing cost of equipment, improved sewing machine's packaging efficiency, when simultaneously through double cam, the syntropy rotates, has guaranteed work feed pinion rack lift and the stability of removal, has improved the quality of making up of goods.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, so any modifications, equivalent replacements, improvements, etc. made to the above embodiments by the technology of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a sewing machine's two cam work feed mechanisms, includes the sewing machine body, this internal lower shaft mechanism and work feed subassembly of being equipped with of sewing machine, its characterized in that, lower shaft mechanism includes the transmission shaft and drives pivoted shuttle core subassembly by the transmission shaft, the work feed subassembly includes pinion rack mounting bracket, first work feed gear, second work feed gear, first pivot and second pivot, this is internal that sewing machine is located to first pivot and the parallel interval of second pivot, and the second pivot is located the below of first pivot, first work feed gear is connected with first pivot rotation to first work feed gear and first pivot coaxial setting, second work feed gear rotates with the second pivot to be connected to second work feed gear and second pivot coaxial setting, first work feed gear face is equipped with the first cam with first pivot eccentric settings to one side of pinion rack mounting bracket, second work feed gear face is equipped with the second cam eccentric settings with the second pivot to one side of pinion rack mounting bracket to be equipped with second cam gear, the upper end of being equipped with the work feed gear side direction of first cam gear mounting bracket and second cam gear and the mounting bracket correspond the mounting hole and first cam gear and second cam gear respectively with the installation hole, the first work feed gear and the installation hole are connected with first cam gear, the first cam gear and the installation hole, the installation hole are equipped with the pinion rack and the first cam along with the second cam.

2. The double cam feed mechanism of a sewing machine of claim 1, wherein the first cam and the second cam have the same eccentric direction.

3. The double-cam feed mechanism of a sewing machine as claimed in claim 1, wherein the first feed gear has a first positioning protrusion ring at an opening edge of a side of the first mounting hole facing the first feed gear, the first feed gear has a first positioning groove corresponding to the first positioning protrusion ring at a peripheral side of the first cam, and the first positioning protrusion ring is rotatably fitted in the first positioning groove when assembled.

4. The double-cam feed mechanism of a sewing machine as claimed in claim 1, wherein the second mounting hole has a second positioning protrusion ring at an opening edge of a side facing the second feed gear, the second feed gear has a second positioning groove corresponding to the second positioning protrusion ring at a peripheral side of the second cam, and the second positioning protrusion ring is rotatably fitted in the second positioning groove when assembled.

5. The double cam feed mechanism of a sewing machine according to claim 1, wherein the gear ratios of the transmission gear to the first feed gear and the second feed gear are each 15:30.

6. the double-cam cloth feeding mechanism of the sewing machine as claimed in claim 1, wherein the toothed plate mounting frame comprises a horizontally arranged transverse mounting plate and a vertically arranged longitudinal mounting plate, the transverse mounting plate is arranged at the upper end of the longitudinal mounting plate, the transverse mounting plate and the longitudinal mounting plate are integrally connected, and the first mounting hole and the second mounting hole are arranged on the longitudinal mounting plate.

7. The double cam feed mechanism of a sewing machine of claim 1, wherein the first cam and the second cam are both cylindrically configured and have the same diameter.

8. The double-cam cloth feeding mechanism of the sewing machine as claimed in claim 6 or 7, wherein the cloth feeding assembly further comprises a toothed plate mounting plate, the cloth feeding toothed plate is fixedly arranged on the toothed plate mounting plate, and the toothed plate mounting plate is detachably mounted on the transverse mounting plate through screws.

9. The double-cam cloth feeding mechanism of sewing machine according to claim 1, wherein a first fixing hole is provided on a peripheral side of the first rotating shaft, the first rotating shaft is fixedly attached to the sewing machine body by screwing a screw through the first fixing hole into the screw hole, and a second fixing hole is provided on a peripheral side of the second rotating shaft, and the second rotating shaft is fixedly attached to the sewing machine body by screwing a screw through the second fixing hole into the screw hole.

10. The double-cam cloth feeding mechanism of the sewing machine according to claim 1, wherein the cloth feeding assembly further comprises a first limit ring and a second limit ring, a first baffle ring is arranged at one end of the first rotating shaft close to the toothed plate mounting frame, a second baffle ring is arranged at one end of the second rotating shaft close to the toothed plate mounting frame, during assembly, the first limit ring is arranged at one end of the first mounting hole far away from the first cloth feeding gear, the first baffle ring is positioned at one side of the first limit ring far away from the first cloth feeding gear, the second limit ring is arranged at one end of the second mounting hole far away from the second cloth feeding gear, and the second baffle ring is positioned at one side of the second limit ring far away from the second cloth feeding gear.