CN218756395U - Sewing machine and needle pitch adjusting mechanism thereof - Google Patents
Sewing machine and needle pitch adjusting mechanism thereof Download PDFInfo
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- CN218756395U CN218756395U CN202222721065.8U CN202222721065U CN218756395U CN 218756395 U CN218756395 U CN 218756395U CN 202222721065 U CN202222721065 U CN 202222721065U CN 218756395 U CN218756395 U CN 218756395U
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- tension spring
- needle pitch
- connecting rod
- spring seat
- sewing machine
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Abstract
The utility model relates to a sewing machine discloses a stitch length adjusting mechanism and sewing machine of sewing machine, including motor, cam, stitch length connecting rod, extension spring seat, extension spring and stitch length adjusting part, the cam is installed on the motor, the spacing of stitch length connecting rod is installed on the cam, one end of extension spring is connected with the stitch length connecting rod, its other end is installed on the extension spring seat, the position of axle screw is installed on the stitch length connecting rod, the gyro wheel is installed on the position of axle screw, the gyro wheel presses at the profile surface of cam; the tension spring seat comprises a bending part, a positioning hole is formed in the bending part, an axis position screw penetrates through the needle pitch connecting rod and then is connected with the positioning hole of the bending part, the tension spring is installed on the axis position screw between the needle pitch connecting rod and the bending part, and the roller and the tension spring are respectively arranged on two sides of the needle pitch connecting rod. The tension spring is directly arranged on the shaft position screw, and a hole does not need to be formed in the needle pitch connecting rod additionally, so that the tension spring is convenient to install.
Description
Technical Field
The utility model relates to a sewing machine especially relates to a sewing machine's gauge needle adjustment mechanism and sewing machine.
Background
The needle pitch adjustment is an important mechanism in the sewing machine, the adjustment is adjusted by original manual operation, the current electric control adjustment is achieved, the adjustment mechanism is optimized on the original technical scheme, the application number of the original scheme is 2022212810480, the needle pitch adjustment mechanism of the sewing machine and the sewing machine are provided with the tension spring in the original scheme, the tension spring in the original scheme is directly fixed on the needle pitch connecting rod, namely, a hole is formed in the needle pitch connecting rod, the hole is used for fixing the tension spring, the installation space for installing the tension spring is narrow, the time and the labor are wasted when the tension spring is installed in the hole, and meanwhile, the tension spring is easily installed to interfere with a roller.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to the shortcoming among the prior art, provide a sewing machine's gauge needle adjustment mechanism and sewing machine.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve:
a stitch length adjusting mechanism of a sewing machine comprises a motor, a cam, a stitch length connecting rod, a tension spring seat, a tension spring and a stitch length adjusting assembly, wherein the cam is arranged on an output shaft of the motor; the tension spring seat comprises a bending part, a positioning hole is formed in the bending part, an axis position screw penetrates through the needle pitch connecting rod and then is connected with the positioning hole of the bending part, the tension spring is installed on the axis position screw between the needle pitch connecting rod and the bending part, and the roller and the tension spring are respectively arranged on two sides of the needle pitch connecting rod. The tension spring is directly arranged on the shaft position screw, and a hole does not need to be formed in the needle pitch connecting rod additionally, so that the tension spring is convenient to install. The axial position screw is connected with the positioning hole in the tension spring seat after passing through the needle pitch connecting rod, and the stability of the axial position screw is good. Meanwhile, the installation position of the tension spring cannot interfere with the roller.
Preferably, the tension spring seat comprises a first tension spring seat and a second tension spring seat fixed on the machine shell, the first tension spring seat is fixed on the second tension spring seat through a screw, one end of the tension spring is fixed with the first tension spring seat, and the other end of the tension spring is connected with the shaft position screw. This extension spring seat among needle pitch adjustment mechanism is split type, and the extension spring seat includes first extension spring seat and second extension spring seat, through the screw connection between the two, just can adjust the pulling force of extension spring when people change first extension spring seat, and the flexibility is good, and the commonality is high.
Preferably, the second tension spring seat is formed by vertically bending a bent plate, and comprises an installation part and a bent part. The second tension spring seat has high bending strength.
Preferably, the second tension spring seat is provided with at least three first mounting holes, and the first tension spring seat is mounted on the first mounting hole of the second tension spring seat.
Preferably, the first tension spring seat is an integrated seat body, the first tension spring seat comprises an upper seat body and a lower seat body, the upper seat body is arranged on the lower seat body and forms an L-shaped seat body, a clamping hole for connecting a tension spring is formed in the upper seat body, a second mounting hole is formed in the lower seat body, and a screw passes through the second mounting hole and then is fixed to the first mounting hole. First extension spring seat is firmly fixed on second extension spring seat, and joint strength is high between the two, and difficult separation has guaranteed the stability of extension spring.
Preferably, the number of the second mounting holes is at least two, and the number of the second mounting holes is less than the number of the first mounting holes. A plurality of mounting holes are reserved in the second mounting hole, and people can conveniently mount other parts.
Preferably, the cam is provided with an annular groove, the needle pitch connecting rod is provided with a notch groove, and when the cam rotates, the cam slides on the notch groove of the needle pitch connecting rod in a limiting mode through the annular groove. The cam and the needle pitch connecting rod slide relatively and are not separated, so that the cam can be ensured to stably drive the needle pitch connecting rod to swing through the roller.
Preferably, the needle pitch adjusting assembly comprises a swinging seat, a feeding shaft, a tooth rack crank assembly and a tooth lifting shaft, the lower end of the needle pitch connecting rod is connected with the swinging seat and drives the swinging, the other end of the swinging seat is connected with the feeding shaft, and the other end of the feeding shaft is connected with the tooth lifting shaft through the tooth rack crank assembly.
A sewing machine includes a needle pitch adjusting mechanism of the sewing machine.
The utility model discloses owing to adopted above technical scheme, have apparent technological effect:
this extension spring seat among needle pitch adjustment mechanism is split type, and the extension spring seat includes first extension spring seat and second extension spring seat, through the screw connection between the two, just can adjust the pulling force of extension spring when people change first extension spring seat, and the flexibility is good, and the commonality is high. The tension spring is directly arranged on the shaft position screw, and a hole does not need to be formed in the needle pitch connecting rod additionally, so that the tension spring is convenient to install.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the exploded structure of fig. 1.
Fig. 3 is a schematic view of the structure of the cam of fig. 1.
FIG. 4 is a schematic view of the assembled structure of the pitch link and its upper components of FIG. 1.
Fig. 5 is a schematic structural diagram of the first tension spring seat in fig. 1.
Fig. 6 is a schematic structural view of the second tension spring seat in fig. 1.
The names of the parts designated by the numerical references in the above figures are as follows:
10-motor, 11-cam, 12-needle pitch connecting rod, 13-tension spring seat, 14-tension spring, 15-axis screw, 16-roller, 17-screw, 18-swinging seat, 19-feeding shaft, 20-tooth frame crank component, 21-tooth lifting shaft, 111-annular groove, 121-notch groove, 131-first tension spring seat, 132-second tension spring seat, 1311-upper seat body, 1312-lower seat body, 1321-first mounting hole, 1322-mounting part, 1323-bending part, 13111-clamping hole, 13121-second mounting hole and 13231-positioning hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1-6 and examples.
Example 1
A needle pitch adjusting mechanism of a sewing machine comprises a motor 10, a cam 11, a needle pitch connecting rod 12, a tension spring seat 13, a tension spring 14 and a needle pitch adjusting component, wherein the arc-shaped contour of the cam 11 is provided with a highest point and a lowest point, any point on a circle can be used as a starting point, and the highest point, the lowest point and the starting point can be passed through by rotating a circle. The cam 11 is installed on an output shaft of the motor 10, the needle gage link 12 is installed on the cam 11 in a limiting mode, one end of a tension spring 14 is connected with the needle gage link 12, the other end of the tension spring is installed on a tension spring seat 13, an axis position screw 15 is installed on the needle gage link 12, a roller 16 is installed on the axis position screw 15, the roller 16 is a bearing, the roller 16 is tightly pressed on a contour surface of the cam 11 through the tension spring 14, when the cam 11 rotates, the roller 16 can move along the contour surface of the cam 11, and therefore the needle gage link 12 can swing. The tension spring seat 13 comprises a bending portion 1323, a positioning hole 13231 is formed in the bending portion 1323, an axial position screw 15 penetrates through the needle pitch connecting rod 12 and then is connected with the positioning hole 13231 of the bending portion 1323, the tension spring 14 is installed on the axial position screw 15 between the needle pitch connecting rod 12 and the bending portion 1323, and the stability of the axial position screw 15 is good. Compared with the traditional installation mode, the tension spring 14 in the mechanism is also convenient to install, and the roller 16 and the tension spring 14 are respectively arranged on two sides of the needle pitch connecting rod 12.
The tension spring seat 13 is of a split structure, the tension spring seat 13 includes a first tension spring seat 131 and a second tension spring seat 132 fixed on the casing, the first tension spring seat 131 is fixed on the second tension spring seat 132 through a screw 17, and the second tension spring seat 132 is formed by vertically bending a bending plate. The second tension spring seat 132 is provided with at least three first mounting holes 1321, the number of the first mounting holes 1321 is four, the first tension spring seat 131 is mounted on the first mounting hole 1321 of the second tension spring seat 132, one end of the tension spring 14 is fixed to the first tension spring seat 131, the other end of the tension spring is connected to the shaft position screw 15, the shaft position screw 15 is connected to the second tension spring seat 132 after passing through the gauge link 12, and the end of the tension spring 14 is limited between the gauge link 12 and the second tension spring seat 132.
The first tension spring seat 131 is an integrated seat body, the first tension spring seat 131 includes an upper seat body 1311 and a lower seat body 1312, the upper seat body 1311 is disposed on the lower seat body 1312 and forms an L-shaped seat body, a fastening hole 13111 for connecting the tension spring 14 is disposed on the upper seat body 1311, a second mounting hole 13121 is disposed on the lower seat body 1312, and the screw 17 passes through the second mounting hole 13121 and then is fixed to the first mounting hole 1321.
The second tension spring seat 132 is formed by vertically bending a bent plate, the second tension spring seat 132 includes an installation portion 1322 and a bent portion 1323, the first tension spring seat 131 is installed on the installation portion 1322, and the shaft position screw 15 is installed on the bent portion 1323.
The cam 11 is provided with an annular groove 111, the cam 11 can be limited and installed on the needle pitch connecting rod 12 through the annular groove 111, the needle pitch connecting rod 12 is provided with a notch groove 121, when the cam 11 rotates, the cam 11 is limited and slides on the notch groove 121 of the needle pitch connecting rod 12 through the annular groove 111, and when the needle pitch connecting rod 12 and the cam 11 move relatively, the needle pitch connecting rod 12 and the cam 11 cannot be separated.
The needle pitch adjusting assembly comprises a swing seat 18, a feeding shaft 19, a tooth frame crank assembly 20 and a feed lifting shaft 21, the lower end of a needle pitch connecting rod 12 is connected with the swing seat 18 and drives the swing, the other end of the swing seat 18 is connected with the feeding shaft 19, the swing seat 18 drives the feeding shaft 19 to move, the other end of the feeding shaft 19 is connected with the feed lifting shaft 21 through the tooth frame crank assembly 20, and finally the needle pitch is changed through the tooth frame crank assembly 20.
Example 2
Embodiment 2 has substantially the same features as embodiment 1 except that the number of second mounting holes 13121 is at least two, the number of second mounting holes 13121 is two in this embodiment, the number of second mounting holes 13121 is smaller than the number of first mounting holes 1321, and the remaining first mounting holes 1321 can be used to mount other components.
Example 3
A sewing machine comprising the needle pitch adjusting mechanism of the sewing machine of embodiment 1 or 2.
Claims (9)
1. A needle pitch adjusting mechanism of a sewing machine comprises a motor (10), a cam (11), a needle pitch connecting rod (12), a tension spring seat (13), a tension spring (14) and a needle pitch adjusting assembly, wherein the cam (11) is installed on an output shaft of the motor (10), the needle pitch connecting rod (12) is installed on the cam (11) in a limiting mode, one end of the tension spring (14) is connected with the needle pitch connecting rod (12), the other end of the tension spring is installed on the tension spring seat (13), an axial position screw (15) is installed on the needle pitch connecting rod (12), a roller (16) is installed on the axial position screw (15), and the roller (16) is tightly pressed on a profile surface of the cam (11) through the tension spring (14); the method is characterized in that: the tension spring seat (13) comprises a bending part (1323), a positioning hole (13231) is formed in the bending part (1323), an axis position screw (15) penetrates through the needle pitch connecting rod (12) and then is connected with the positioning hole (13231) of the bending part (1323), the tension spring (14) is installed on the axis position screw (15) between the needle pitch connecting rod (12) and the bending part (1323), and the roller (16) and the tension spring (14) are respectively arranged on two sides of the needle pitch connecting rod (12).
2. A needle pitch adjusting mechanism of a sewing machine according to claim 1, wherein: the tension spring seat (13) comprises a first tension spring seat (131) and a second tension spring seat (132) fixed on the machine shell, the first tension spring seat (131) is fixed on the second tension spring seat (132) through a screw (17), one end of the tension spring (14) is fixed with the first tension spring seat (131), and the other end of the tension spring is connected with the shaft position screw (15).
3. A needle pitch adjusting mechanism of a sewing machine according to claim 2, wherein: the second tension spring seat (132) is formed by vertically bending a bent plate, and the second tension spring seat (132) comprises an installation part (1322) and a bent part (1323).
4. A needle pitch adjusting mechanism of a sewing machine according to claim 2, wherein: the second tension spring seat (132) is provided with at least three first mounting holes (1321), and the first tension spring seat (131) is mounted on the first mounting holes (1321) of the second tension spring seat (132).
5. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: first spring seat (131) formula pedestal as an organic whole, first spring seat (131) are including last pedestal (1311) and lower pedestal (1312), and last pedestal (1311) is established on lower pedestal (1312) and is formed the pedestal of "L" shape, is equipped with card hole (13111) that supply extension spring (14) to connect on last pedestal (1311), is equipped with second mounting hole (13121) on lower pedestal (1312), and screw (17) pass through second mounting hole (13121) after-fixing on first mounting hole (1321).
6. A needle pitch adjusting mechanism of a sewing machine according to claim 5, characterized in that: the number of the second mounting holes (13121) is at least two, and the number of the second mounting holes (13121) is less than the number of the first mounting holes (1321).
7. The needle pitch adjusting mechanism of a sewing machine according to any one of claims 1 to 6, wherein: the cam (11) is provided with an annular groove (111), the needle pitch connecting rod (12) is provided with a notch groove (121), and when the cam (11) rotates, the cam (11) slides on the notch groove (121) of the needle pitch connecting rod (12) in a limiting mode through the annular groove (111).
8. A needle pitch adjusting mechanism of a sewing machine according to claim 1, wherein: the needle pitch adjusting assembly comprises a swing seat (18), a feeding shaft (19), a tooth frame crank assembly (20) and a tooth lifting shaft (21), the lower end of a needle pitch connecting rod (12) is connected with the swing seat (18) and drives the swing, the other end of the swing seat (18) is connected with the feeding shaft (19), and the other end of the feeding shaft (19) is connected with the tooth lifting shaft (21) through the tooth frame crank assembly (20).
9. A sewing machine characterized by: a needle pitch adjusting mechanism comprising the sewing machine of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222721065.8U CN218756395U (en) | 2022-10-14 | 2022-10-14 | Sewing machine and needle pitch adjusting mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222721065.8U CN218756395U (en) | 2022-10-14 | 2022-10-14 | Sewing machine and needle pitch adjusting mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218756395U true CN218756395U (en) | 2023-03-28 |
Family
ID=85698414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222721065.8U Active CN218756395U (en) | 2022-10-14 | 2022-10-14 | Sewing machine and needle pitch adjusting mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218756395U (en) |
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2022
- 2022-10-14 CN CN202222721065.8U patent/CN218756395U/en active Active
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