CN217733449U - Sewing machine and needle pitch adjusting mechanism thereof - Google Patents
Sewing machine and needle pitch adjusting mechanism thereof Download PDFInfo
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- CN217733449U CN217733449U CN202221281048.0U CN202221281048U CN217733449U CN 217733449 U CN217733449 U CN 217733449U CN 202221281048 U CN202221281048 U CN 202221281048U CN 217733449 U CN217733449 U CN 217733449U
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Abstract
The utility model relates to the technical field of sewing machines, and discloses a stitch length adjusting mechanism of a sewing machine and the sewing machine, which comprises a motor, a cam, a stitch length sliding connecting rod, a swing seat component, a feeding shaft, a tooth frame component and a frame, wherein the motor is connected with the cam; the needle distance sliding connecting rod is connected with a spring between the needle distance sliding connecting rod and the rack, the cam comprises a profile part and a connecting part, a clamping groove is formed in the connecting part, a track groove is formed in the needle distance sliding connecting rod, the needle distance sliding connecting rod is installed on the clamping groove of the connecting part through the track groove, a bearing is installed on the needle distance sliding connecting rod, and the bearing is tightly pressed on the profile part. The motor drives the cam to contact with the bearing on the needle pitch sliding connecting rod, the needle pitch sliding connecting rod directly drives the swinging seat component to move, and then the needle pitch is changed from the feeding shaft to the tooth rack component.
Description
Technical Field
The utility model relates to a sewing machine technical field especially relates to a sewing machine's gauge needle adjustment mechanism and sewing machine.
Background
The needle pitch of the early sewing machine is manually adjusted, and the precision of the needle pitch is low. With the development of science and technology, the needle pitch is basically controlled through electronic control, parameters can be adjusted, and precision is optimized, for example, a device for lifting and pressing a presser foot to adjust the needle pitch of a sewing machine with the application number of 201910098281.1 and the sewing machine are provided, a cam of the sewing machine is an inner cam, the cam is complex in structure and difficult to machine, and meanwhile, the needle pitch adjusting mechanism is complex and high in manufacturing cost due to the fact that a needle pitch adjusting driving crank is connected with the needle pitch adjusting mechanism. After the sewing machine goes wrong, the maintenance cost is high.
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 sliding connecting rod, a swinging seat component, a feeding shaft, a tooth frame component and a rack, wherein an output shaft of the motor is connected with the cam; the needle distance sliding connecting rod is connected with a spring between the needle distance sliding connecting rod and the rack, the cam comprises a profile part and a connecting part, a clamping groove is formed in the connecting part, a track groove in a U shape is formed in the needle distance sliding connecting rod, the needle distance sliding connecting rod is installed on the clamping groove of the connecting part through the track groove, a bearing is installed on the needle distance sliding connecting rod, and the bearing is tightly pressed on a profile surface of the profile part through the spring. The cam directly presses the bearing on the needle pitch sliding connecting rod, the needle pitch sliding connecting rod drives the swinging seat assembly, the intermediate connection is less, the needle pitch adjustment sensitivity is high, the manufacturing cost is less than that of a traditional needle pitch adjusting mechanism, and the later maintenance cost is low. The needle pitch adjusting mechanism is in contact with a bearing on the needle pitch sliding connecting rod through the motor driving cam, the needle pitch sliding connecting rod directly drives the swinging seat component to move, and then the needle pitch is changed from the feeding shaft to the tooth frame component.
Preferably, the needle pitch sliding connecting rod is an integrated connecting rod and comprises a track portion and a rod end portion, the track portion is connected with the rod end portion to form a two-tooth fork, a track groove is formed in the track portion, a hanging hole is formed in the rod end portion, one end of a spring is installed on the rod end portion through the hanging hole, a bearing is installed on the rod end portion through a pin shaft, and the tail end of the rod end portion is installed on the swing seat assembly through a clamp spring. The needle pitch sliding connecting rod not only can drive the swing seat assembly to move, but also can slide relative to the cam, so that the needle pitch sliding connecting rod directly drives the swing seat assembly to move, and intermediate connecting parts are reduced.
Preferably, the contour portion includes a protrusion portion, a groove portion and a circumferential portion, the circumferential portion protrudes upward to form the protrusion portion, the protrusion portion has a highest point, the circumferential portion is recessed downward to form the groove portion, the groove portion has a lowest point, the protrusion portion is adjacent to the groove portion, and a side wall of one side of the protrusion portion and a side wall of one side of the groove portion are on the same arc surface.
Preferably, the connecting portion are shaft sleeves, shaft holes are formed in the central axis of the connecting portion, locking holes communicated with the shaft holes are formed in the outer side wall of the connecting portion, the rod end of the motor output shaft extends into the shaft holes, and locking screws connected with the motor output shaft in a limiting mode are installed in the locking holes. The motor and the cam are firmly connected and cannot be easily separated.
Preferably, the automatic feeding device further comprises a feed lifting rock shaft, an upper shaft, a feeding seat connecting rod and a feed lifting rock seat connecting rod, wherein the swinging seat assembly comprises a feeding shaft seat and a feed lifting rock shaft seat, the feeding shaft is arranged on the feeding shaft seat, the feeding seat connecting rod is arranged between the feeding shaft seat and the upper shaft, the feed lifting rock shaft is arranged on the feed lifting rock shaft seat, and the feed lifting rock seat connecting rod is arranged between the feed lifting rock shaft seat and the upper shaft.
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:
the cam directly presses the bearing on the needle pitch sliding connecting rod, the needle pitch sliding connecting rod drives the swinging seat assembly, the intermediate connection is less, the needle pitch adjustment sensitivity is high, the manufacturing cost is less than that of a traditional needle pitch adjusting mechanism, and the later maintenance cost is low. The needle pitch adjusting mechanism is in contact with a bearing on the needle pitch sliding connecting rod through the motor driving cam, the needle pitch sliding connecting rod directly drives the swinging seat component to move, and then the needle pitch is changed from the feeding shaft to the tooth frame component.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the exploded structure of fig. 1.
Fig. 3 is a perspective view of the cam of fig. 2.
Fig. 4 is a side view of the cam of fig. 2.
Fig. 5 is a schematic view of the combination structure of the needle pitch sliding connecting rod and the bearing in fig. 2.
The names of the parts designated by the numerical references in the above figures are as follows: the device comprises a motor 10, a cam 11, a needle pitch sliding connecting rod 12, a swinging seat assembly 13, a feeding shaft 14, a tooth frame assembly 15, a spring 16, a bearing 17, a snap spring 18, a tooth lifting shaft 19, an upper shaft 20, a feeding seat connecting rod 21, a tooth lifting seat connecting rod 22, a profile part 111, a connecting part 112, a track groove 120, a track part 121, a rod end part 122, a feeding shaft seat 131, a tooth lifting shaft seat 132, a protrusion 1111, a groove part 1112, a circumference part 1113, a circumference part 1120, a clamping groove 1121, a shaft hole 1122, a locking hole 1122 and a hanging hole 1221.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1-5 and examples.
Example 1
The utility model provides a sewing machine's gauge needle adjustment mechanism, includes motor 10, cam 11, gauge needle slip connecting rod 12, swing seat subassembly 13, feeding shaft 14, tooth frame subassembly 15 and frame, and the output shaft and the cam 11 of motor 10 are connected, and motor 10 can drive cam 11 and rotate, and gauge needle slip connecting rod 12 one end is connected with cam 11, and its other end is connected with swing seat subassembly 13, and feeding shaft 14 one end and swing seat subassembly 13, its other end are connected with tooth frame subassembly 15. The cam 11 rotates to drive the needle pitch sliding connecting rod 12 to swing, the needle pitch sliding connecting rod 12 directly drives the swing seat assembly 13 to move, and then power is transmitted to the tooth rack assembly 15 through the feeding shaft 14, so that the needle pitch is adjusted. A spring 16 is connected between the needle distance sliding connecting rod 12 and the frame, and the spring 16 can enable the profile surface of the cam 11 to be tightly connected with the needle distance sliding connecting rod 12. The cam 11 is an integral cam, the cam 11 includes a profile portion 111 and a connecting portion 112, a clamping groove 1120 is arranged on the connecting portion 112, the clamping groove 1120 is an annular groove, a track groove 120 in a U shape is arranged on the needle pitch sliding connecting rod 12, the needle pitch sliding connecting rod 12 is mounted on the clamping groove 1120 of the connecting portion 112 through the track groove 120, a bearing 17 is mounted on the needle pitch sliding connecting rod 12, and the bearing 17 is pressed on the profile surface of the profile portion 111 through a spring 16. The connecting portion 112 of the cam 11 can slide relatively on the track groove 120 of the needle pitch sliding link 12, so that the contour surface of the contour portion 111 can be pressed against the bearing 17 of the needle pitch sliding link 12. The needle pitch sliding connecting rod 12 directly drives the swing seat assembly 13, the number of connecting parts in the middle is small, the manufacturing cost of the mechanism is low, and meanwhile, the operation and installation are simple, the needle pitch is stable, and the sewing efficiency is high.
The needle pitch sliding connecting rod 12 is an integrated connecting rod, the needle pitch sliding connecting rod 12 comprises a track portion 121 and a rod end portion 122, the track portion 121 is connected with the rod end portion 122 to form a two-tooth fork, a track groove 120 is formed in the track portion 121, a hanging hole 1221 is formed in the rod end portion 122, the hanging hole 1221 penetrates through the rod end portion 122, and the hanging hole 1221 is formed below the installation position of the bearing 17. One end of the spring 16 is mounted on the rod end 122 through the hanging hole 1221, the bearing 17 is mounted on the rod end 122 through a pin, and the end of the rod end 122 is mounted on the swinging seat assembly 13 through the snap spring 18.
The distance adjusting mechanism further comprises a feed lifting rock shaft 19, an upper shaft 20, a feeding seat connecting rod 21 and a feed lifting rock seat connecting rod 22, the swing seat assembly 13 comprises a feed shaft seat 131 and a feed lifting rock shaft seat 132, the feed shaft 14 is installed on the feed shaft seat 131, the feed feeding seat connecting rod 21 is installed between the feed shaft seat 131 and the upper shaft 20, the feed lifting rock shaft 19 is installed on the feed lifting rock shaft seat 132, and the feed lifting rock seat connecting rod 22 is installed between the feed lifting rock shaft seat 132 and the upper shaft 20.
The working principle is as follows: the motor 10 is fixed on the machine shell, the cam 11 is fixed on the motor 10 through a locking screw, the needle pitch sliding connecting rod 12 penetrates through a clamping groove 1120 of the cam 11, one end of the spring 16 is installed on the needle pitch sliding connecting rod 12 to slide, the other end of the spring 16 is fixed on the tension spring fixing seat, the tension spring fixing seat is installed on the machine shell, the needle pitch sliding connecting rod 12 keeps tension all the time, the bearing 17 is close to and tangent to the cam 11, the motor 10 drives the cam 11 to enable the bearing 17 to move along the radian track of the cam, and the needle pitch sliding connecting rod 12 moves. The other end of the needle pitch sliding connecting rod 12 is installed on a swing seat assembly 13 through a clamp spring 18, the swing seat assembly 13 needs to keep flexible rotation, the swing seat assembly 13 is installed on a feeding shaft 14, and a tooth rack assembly 15 is installed at the other end of the feeding shaft 14. The needle pitch sliding connecting rod 12 moves and is transmitted to the swing seat assembly 13 and the feeding shaft 14, so that the tooth rack assembly 15 moves back and forth to realize the change of the needle pitch.
Example 2
The embodiment 2 has substantially the same characteristics as the embodiment 1, except that the connecting portion 112 is a shaft sleeve, a shaft hole 1121 is arranged on a central axis of the connecting portion 112, a locking hole 1122 connected with the shaft hole 1121 is arranged on an outer side wall of the connecting portion 112, a rod end of an output shaft of the motor 10 extends into the shaft hole 1121, and a locking screw connected with the output shaft of the motor 10 in a limiting manner is installed in the locking hole 1122. The tip of motor 10 output shaft is equipped with the breach, and breach department forms spacing plane, and locking screw top is on spacing plane to on the output shaft with cam 11 restriction, guarantee that motor 10 can drive cam 11 and rotate.
Example 3
A sewing machine comprising the needle pitch adjusting mechanism of the sewing machine in embodiment 1 or 2.
Claims (6)
1. A needle pitch adjusting mechanism of a sewing machine comprises a motor (10), a cam (11), a needle pitch sliding connecting rod (12), a swing seat assembly (13), a feeding shaft (14), a tooth frame assembly (15) and a rack, wherein an output shaft of the motor (10) is connected with the cam (11), one end of the needle pitch sliding connecting rod (12) is connected with the cam (11), the other end of the needle pitch sliding connecting rod is connected with the swing seat assembly (13), one end of the feeding shaft (14) is connected with the swing seat assembly (13), and the other end of the feeding shaft is connected with the tooth frame assembly (15); the method is characterized in that: be connected with spring (16) between gauge needle slip connecting rod (12) and the frame, cam (11) are including profile portion (111) and connecting portion (112), be equipped with draw-in groove (1120) on connecting portion (112), be equipped with track groove (120) that the shape is "U" shape on gauge needle slip connecting rod (12), gauge needle slip connecting rod (12) are installed on draw-in groove (1120) of connecting portion (112) through track groove (120), install bearing (17) on gauge needle slip connecting rod (12), bearing (17) compress tightly on the profile surface of profile portion (111) through spring (16).
2. A needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: needle pitch slip connecting rod (12) formula connecting rod as an organic whole, needle pitch slip connecting rod (12) are including track portion (121) and rod end portion (122), track portion (121) are connected with rod end portion (122) and are formed two forks, establish on track portion (121) track groove (120), be equipped with hanging hole (1221) on rod end portion (122), install on rod end portion (122) through hanging hole (1221) spring (16) one end, bearing (17) are installed on rod end portion (122) through the round pin axle, install on swing seat subassembly (13) through jump ring (18) rod end portion (122) end.
3. A needle pitch adjusting mechanism of a sewing machine according to claim 1, wherein: the profile portion (111) comprises a protruding portion (1111), a recessed portion (1112) and a circumferential portion (1113), the circumferential portion (1113) protrudes upwards to form the protruding portion (1111), the protruding portion (1111) is provided with a highest point, the circumferential portion (1113) is recessed downwards to form the recessed portion (1112), the recessed portion (1112) is provided with a lowest point, the protruding portion (1111) is adjacent to the recessed portion (1112), and the side wall of one side of the protruding portion (1111) and the side wall of one side of the recessed portion (1112) are on the same arc-shaped surface.
4. A needle pitch adjusting mechanism of a sewing machine according to claim 1, wherein: the connecting part (112) is a shaft sleeve, a shaft hole (1121) is formed in the central axis of the connecting part (112), a locking hole (1122) communicated with the shaft hole (1121) is formed in the outer side wall of the connecting part (112), the rod end of an output shaft of the motor (10) extends into the shaft hole (1121), and a locking screw in limiting connection with the output shaft of the motor (10) is installed in the locking hole (1122).
5. The needle pitch adjusting mechanism of a sewing machine according to any one of claims 1 to 4, wherein: the swing seat assembly comprises a swing seat assembly (13) and a swing seat assembly, and is characterized by further comprising a feed lifting tooth shaft (19), an upper shaft (20), a feeding seat connecting rod (21) and a lifting tooth seat connecting rod (22), wherein the swing seat assembly (13) comprises a feeding shaft seat (131) and a lifting tooth shaft seat (132), the feeding shaft (14) is installed on the feeding shaft seat (131), the feeding seat connecting rod (21) is installed between the feeding shaft seat (131) and the upper shaft (20), the lifting tooth shaft (19) is installed on the lifting tooth shaft seat (132), and the lifting tooth seat connecting rod (22) is installed between the lifting tooth shaft seat (132) and the upper shaft (20).
6. A sewing machine characterized by: a needle pitch adjusting mechanism comprising the sewing machine according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281048.0U CN217733449U (en) | 2022-05-24 | 2022-05-24 | Sewing machine and needle pitch adjusting mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281048.0U CN217733449U (en) | 2022-05-24 | 2022-05-24 | Sewing machine and needle pitch adjusting mechanism thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217733449U true CN217733449U (en) | 2022-11-04 |
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ID=83838742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221281048.0U Active CN217733449U (en) | 2022-05-24 | 2022-05-24 | Sewing machine and needle pitch adjusting mechanism thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217733449U (en) |
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2022
- 2022-05-24 CN CN202221281048.0U patent/CN217733449U/en active Active
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