CN211872253U - Lower feeding mechanism of sewing machine - Google Patents
Lower feeding mechanism of sewing machine Download PDFInfo
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- CN211872253U CN211872253U CN201922430504.8U CN201922430504U CN211872253U CN 211872253 U CN211872253 U CN 211872253U CN 201922430504 U CN201922430504 U CN 201922430504U CN 211872253 U CN211872253 U CN 211872253U
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- bevel gear
- mounting block
- gear
- hole
- feeding
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Abstract
The utility model relates to a sewing machine field, concretely relates to feeding mechanism under sewing machine. The problems of high precision requirement on parts, complex structure and low automation degree in the existing driving mode are solved. The technical scheme of the utility model includes installation piece, pay-off gear support and step motor, step motor through the system given input rotational speed, gear and gear engagement, speed size is unchangeable, the transmission shaft position changes, gear and worm are installed epaxially, the slew velocity is the same, then worm and worm wheel meshing realize the first level speed reduction and change the transmission direction, change into vertical direction from the horizontal direction; the worm wheel and the gear are arranged on the shaft, the rotating speeds are the same, and the gear is meshed with the feeding gear to realize second-stage speed reduction and achieve the target speed.
Description
Technical Field
The utility model relates to a sewing machine field, concretely relates to feeding mechanism under sewing machine.
Background
The lower feeding mechanism of the existing roller feeding sewing machine is mainly indirectly driven by a spindle motor, the spindle motor is connected to a lower shaft through a coupler and then drives the lower feeding mechanism by the lower shaft, the power source of the existing roller feeding sewing machine is mainly the spindle motor as a unique driving element, and the adjustment of the parameters of the lower feeding mechanism is realized by changing the output characteristics of the spindle motor through a complete machine control system; the driving mode has higher dependence on the part manufacturing precision of the lower feeding mechanism part, the machine adjustment is more complicated, and the automation degree is low.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a feeding mechanism under sewing machine for solve the precision requirement height to the spare part that current drive mode exists, the structure is complicated, problem that degree of automation is low.
For solving the problems existing in the prior art, the technical scheme of the utility model is that: the utility model provides a feeding mechanism under sewing machine which characterized in that: the special-shaped mounting block is a special-shaped piece, a stepping motor is connected to the rear side plane of the mounting block, a driving cylindrical helical gear is sleeved on a shaft of the stepping motor, a vertical through hole is formed in the top of the mounting block downwards, a horizontal hole is formed in the front end of the mounting block, and the horizontal hole is communicated with the vertical through hole;
a horizontal shaft penetrates through the horizontal hole, a worm and a driven cylindrical helical gear are sleeved on the horizontal shaft, and the driven cylindrical helical gear is meshed with the driving cylindrical helical gear;
the embedded pay-off bevel gear support that is equipped with of vertical through-hole, the structure of pay-off bevel gear support be the middle rectangular plate that is provided with the round hole, one side an organic whole of rectangular plate is provided with tubaeform, is provided with the breach on the tubaeform, the both sides of rectangular plate are provided with the ear, are provided with the vertical axis in the round hole, the lower extreme of vertical axis stretches into in the vertical through-hole of installation piece, stretch into on the vertical axis of installation piece from the bottom up the cover be equipped with worm wheel and vertical axis bevel gear, the worm wheel meshes with the worm mutually, the tubaeform of pay-off bevel gear support on the cover be equipped with the pay-off bevel gear.
Furthermore, the feeding bevel gear support is fixedly connected with the mounting block through ears on two sides of the rectangular plate.
Furthermore, the outer side of the top of the vertical through hole of the mounting block is arc-shaped, and the feeding bevel gear is pressed on the arc-shaped edge of the mounting block through a feeding bevel gear pressing plate.
Furthermore, one side of the lower part of the mounting block is provided with a mounting seat, and the height of the mounting block is adjusted through the mounting seat.
Furthermore, the left side and the right side of the mounting block are respectively provided with a hole and are covered by a cover plate.
Further, the bottom of installation piece is provided with holding down plate.
Compared with the prior art, the utility model has the advantages as follows:
1. the utility model adopts the stepping motor to directly drive a set of speed change mechanism, realizes the function of feeding the lower gear, realizes the needle pitch and the feeding speed by the control system, and improves the operability and the maintainability;
2. the utility model discloses an independent step motor drive structure is different from complete machine dependence spindle motor and drive mechanism's mode, helps improving degree of automation, increases the reliability.
Drawings
FIG. 1 is an exploded view of the lower feed mechanism;
FIG. 2 is a schematic structural view of the assembled lower feeding mechanism;
FIG. 3 is a schematic view of a lower feed drive configuration;
FIG. 4 is a schematic view of a mounting block structure;
FIG. 5 is a partial cross-sectional view of the internal structure of FIG. 4;
FIG. 6 is a schematic view of a feed bevel gear support;
FIG. 7 is a schematic view of a mounting base structure;
FIG. 8 is a schematic view of a worm gear configuration;
FIG. 9 is a schematic view of a vertical axis bevel gear configuration;
FIG. 10 is a connecting view of the feed bevel gear and the vertical shaft bevel gear;
FIG. 11 is a view of the worm wheel and worm connection;
FIG. 12 is a connecting view of a feeding bevel gear and a feeding bevel gear support;
FIG. 13 is a drawing showing a feed bevel gear support, vertical shaft bevel gear, and vertical shaft connection;
FIG. 14 is a view of the mounting block and mounting block connection;
FIG. 15 is a connection view of the lower feeding mechanism and the housing;
FIG. 16 is a connection view of the mounting block, mounting base and lower platen;
description of reference numerals: 1-stepping motor, 2-driving cylindrical helical gear, 3-driven cylindrical helical gear, 4-horizontal shaft, 5-worm, 6-mounting seat, 7-cover plate, 8-lower pressing plate, 9-feeding bevel gear pressing plate, 10-feeding bevel gear, 11-worm gear, 12-vertical shaft bevel gear, 13-vertical shaft, 14-feeding bevel gear support, 15-mounting block and 16-machine shell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a lower feeding mechanism of a sewing machine, as shown in fig. 1-15: the device comprises a stepping motor 1, a driving cylindrical helical gear 2, a driven cylindrical helical gear 3, a horizontal shaft 4, a worm 5, a mounting seat 6, a feeding bevel gear pressing plate 9, a feeding bevel gear 10, a worm wheel 11, a vertical shaft bevel gear 12, a vertical shaft 13, a feeding bevel gear support 14 and a mounting block 15;
the mounting block 15 is a special-shaped piece, the rear plane of the mounting block 15 is connected with the stepping motor 1, the shaft of the stepping motor 1 is sleeved with the driving cylindrical helical gear 2, the top of the mounting block 15 is provided with a vertical through hole downwards, the front end of the mounting block is provided with a horizontal hole, and the horizontal hole is communicated with the vertical through hole, as shown in fig. 4 and 5;
a horizontal shaft 4 penetrates through a horizontal hole of the mounting block 15, a worm 5 and a driven cylindrical helical gear 3 are sleeved on the horizontal shaft 4, and the driven cylindrical helical gear 3 is meshed with the driving cylindrical helical gear 2; a feeding bevel gear support 14 is embedded in the vertical through hole, the feeding bevel gear support 14 is a rectangular plate with a round hole in the middle, one side of the rectangular plate is integrally provided with a horn shape, a gap is arranged on the horn shape, ears are arranged on two sides of the rectangular plate, and the feeding bevel gear support 14 is fixedly connected with a mounting block 15 through the ears on two sides of the rectangular plate; be provided with vertical axis 13 in the round hole, the lower extreme of vertical axis 13 stretches into in the vertical through-hole of installation piece 15, stretches into on the vertical axis 13 of installation piece 15 from the bottom up the cover and is equipped with worm wheel 11 and vertical axis bevel gear 12, worm wheel 11 meshes with worm 15 mutually, the tubaeform of pay-off bevel gear support 14 on the cover be equipped with pay-off bevel gear 10, pay-off bevel gear 10 mesh mutually with vertical axis bevel gear 12, as shown in fig. 6-13.
The outer side of the top of the vertical through hole of the mounting block 15 is set to be circular arc, the feeding bevel gear 10 is pressed on the circular arc edge of the mounting block 15 through a feeding bevel gear pressing plate 9, a connecting plate is arranged on the lower portion of the mounting block 15, a hole is formed in the connecting plate and matched with the hole in the mounting seat 6, the mounting block 15 is mounted on the machine shell 16 through the mounting seat 6, the relative height of the mounting block 15 and the mounting seat 6 is adjusted by changing the length of the connecting bolt screwed into the mounting seat 6 between the mounting block 15 and the mounting seat 6, and the. The feeding bevel gear 10 can realize the adjustment of the upper and lower positions within a certain range along with the movement of the mounting block 15, and the upper and lower positions of the feeding bevel gear can meet the assembly requirement when the machine is debugged; holes are respectively arranged at the left side and the right side of the mounting block 15, the worm 5 is adjusted to be meshed with the worm wheel 11, then a tool is inserted into the two holes to tighten the fastening screws of the worm 5 and the worm wheel 11 for fixing, and the two holes are covered by the cover plate 7 for dust prevention, as shown in fig. 14 and 15; the bottom of the mounting block 15 is provided with a lower pressure plate 8, and an adjusting screw for connecting the mounting block 15 and the mounting seat 6 is screwed on the mounting block 15 through a hole of the lower pressure plate. The lower pressure plate 8 acts as a stop for the screws.
The mounting seat 6 is arranged on one side of the lower part of the mounting block 15, the height of the mounting block 15 is adjusted through the mounting seat 6, and the height of the mounting block is adjusted through the mounting seat and a connecting screw between the mounting seat and the mounting seat, as shown in fig. 16.
The utility model discloses a program control step motor 1 acts according to specific rotational speed curve, through the meshing of drive cylinder helical gear 2 and driven cylinder helical gear 3, worm wheel 11 and 5 conversion transmission directions of worm and speed reduction, and predetermined pay-off speed and gauge needle are realized to last one-level gear and pay-off bevel gear transmission.
Different needle pitches are realized through a control system:
the rotating angle range of the stepping motor 1 in each feeding period is set in the control program, and the feeding needle pitch can be adjusted. The needle moves downwards from the highest position, reaches the lowest position after penetrating the sewing material, then moves upwards, and reaches the highest position again, namely a complete sewing cycle. The feeding bevel gear 10 drags the sewing material to move by the friction force between the feeding bevel gear and the sewing material, and the feeding function is realized. The distance that the material moves during a sewing cycle is the gauge. The distance that the sewing material moves is the same as the arc length of the rotation of the feeding bevel gear 10 and is in direct proportion to the angle of the rotation of the feeding bevel gear 10. Because the feeding bevel gear 10 rotates the stepping motor 1 through twice proportional deceleration of the transmission structure, the rotation angle of the feeding bevel gear 10 is in direct proportion to the rotation angle of the stepping motor 1. In a sewing cycle, increasing the numerical value of the rotation angle of the stepping motor 1, and finally increasing the rotation angle of the feeding bevel gear 10 in proportion after passing through the transmission mechanism, wherein the rotation arc length of the feeding bevel gear 10 is increased, and the feeding needle distance is increased; on the contrary, in a sewing cycle, the numerical value of the rotation angle of the stepping motor 1 is reduced, after passing through the transmission mechanism, the rotation angle of the feeding bevel gear 10 is reduced proportionally, the arc length of the rotation of the feeding bevel gear 10 is reduced, and at the moment, the feeding needle pitch is reduced.
The feeding direction is realized through a control system:
in the sewing process, the friction force of the sewing material and the feeding bevel gear 10 drives the sewing material to move, and the moving direction of the sewing material is the same as the rotating direction of the feeding bevel gear. When the sewing material moves along the direction opposite to the operator, the sewing direction is positive; when the material moves in the direction opposite to the operator, it is the backstitch direction. When the stepping motor 1 rotates anticlockwise, namely moves along the opposite direction of an operator, the feeding bevel gear 10 also rotates anticlockwise after passing through the whole transmission mechanism, the feeding bevel gear 10 drives the sewing material to move backwards, and the feeding direction is the normal sewing direction; on the contrary, when the stepping motor 1 rotates clockwise, that is, when the stepping motor moves in the same direction as the operator, the feeding bevel gear 10 rotates clockwise after passing through the whole transmission mechanism, the feeding bevel gear 10 drives the sewing material to move forward, and the feeding direction is the backstitch direction.
The sewing speed is adjusted through a control system:
the sewing speed is a moving speed of the sewing material in a unit time, and can also be understood as how many needle pitches are sewn in the unit time. The speed curve of the stepping motor 1 is adjusted, and when the rotating speed of the stepping motor 1 is increased, the average moving speed of the needle is increased according to the same proportion, namely, the time of one sewing period is proportionally reduced. After passing through the transmission mechanism, the rotational speed of the feed bevel gear 10 is increased in the same proportion. Thus, in the same working time, the number of the needle pitches of the feeding mechanism for moving the sewing material is increased proportionally, namely the sewing speed is increased. On the contrary, the speed curve of the stepping motor 1 is adjusted, and when the rotating speed of the stepping motor 1 is reduced, the average moving speed of the needle is reduced according to the same proportion, namely, the time of one sewing period is increased proportionally. After passing through the transmission mechanism, the rotational speed of the feed bevel gear 10 is reduced in the same proportion. Thus, in the same working time, the number of the needle pitches of the sewing material moved by the feeding mechanism is proportionally reduced, namely the sewing speed is reduced.
The utility model discloses a working process: the stepping motor 1 is connected to the control box by a cable. The driving oblique cylindrical gear 2 is installed on the stepping motor 1, when the stepping motor 1 rotates, the driving oblique cylindrical gear 2 is driven to rotate, the driven cylindrical helical gear 3 is meshed with the driving cylindrical helical gear 2 and transmits rotation to the driven cylindrical helical gear 3, and the driven cylindrical helical gear 3 and the worm 5 are installed on the horizontal shaft 4 and have the same speed and rotation direction; the worm 5 is meshed with the worm wheel 12, the rotation direction is changed from horizontal to vertical and first-stage speed reduction is realized, the worm wheel 11 and the vertical shaft bevel gear 12 are installed on the vertical shaft 13 and have the same rotating speed and direction, the vertical shaft bevel gear 12 is meshed with the feeding bevel gear 11, the rotation direction is changed from vertical to horizontal and second-stage speed reduction is realized, and the feeding bevel gear 11 is driven to realize feeding.
When the stepping motor rotates anticlockwise, the bevel cylindrical gear 2 rotates clockwise to drive the driven cylindrical bevel gear 3 to rotate anticlockwise, the worm 5 rotates anticlockwise, the meshed worm gear 11 rotates clockwise in the vertical direction, the vertical shaft bevel gear 12 rotates clockwise in the vertical direction, and the feeding bevel gear 10 rotates anticlockwise in the horizontal direction to realize a front seam; on the contrary, when the stepping motor rotates anticlockwise, the helical cylindrical gear 2 rotates clockwise to drive the driven cylindrical helical gear 3 to rotate anticlockwise, the worm 5 rotates anticlockwise, the meshed worm gear 11 rotates clockwise in the vertical direction, the vertical shaft bevel gear 12 rotates clockwise in the vertical direction, and the feeding bevel gear 10 rotates anticlockwise in the horizontal direction, so that backstitch is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (6)
1. The utility model provides a feeding mechanism under sewing machine which characterized in that: the special-shaped gear rack comprises a mounting block (15), wherein the mounting block (15) is a special-shaped piece, a rear plane of the mounting block (15) is connected with a stepping motor (1), a shaft of the stepping motor (1) is sleeved with a driving cylindrical helical gear (2), the top of the mounting block (15) is downwards provided with a vertical through hole, the front end of the mounting block is provided with a horizontal hole, and the horizontal hole is communicated with the vertical through hole;
a horizontal shaft (4) penetrates through the horizontal hole, a worm (5) and a driven cylindrical helical gear (3) are sleeved on the horizontal shaft (4), and the driven cylindrical helical gear (3) is meshed with the driving cylindrical helical gear (2);
the embedded pay-off bevel gear support (14) that is equipped with of vertical through-hole, the structure of pay-off bevel gear support (14) be provided with the rectangular plate of round hole in the middle of for, one side an organic whole of rectangular plate is provided with tubaeform, is provided with the breach on the tubaeform, the both sides of rectangular plate are provided with the ear, be provided with vertical axis (13) in the round hole, the lower extreme of vertical axis (13) stretches into in the vertical through-hole of installation piece (15), stretch into and overlap on vertical axis (13) of installation piece (15) from the bottom up and be equipped with worm wheel (11) and vertical axis bevel gear (12), worm wheel (11) mesh mutually with worm (5), the tubaeform of pay-off bevel gear support (14) on the cover be equipped with pay-off bevel gear (10), pay-off bevel gear (10).
2. The lower feeding mechanism of sewing machine according to claim 1, characterized in that: the feeding bevel gear support (14) is fixedly connected with the mounting block (15) through ears on two sides of the rectangular plate.
3. The lower feeding mechanism of sewing machine according to claim 1 or 2, characterized in that: the outer side of the top of the vertical through hole of the mounting block (15) is arc-shaped, and the feeding bevel gear (10) is pressed on the arc-shaped edge of the mounting block (15) through a feeding bevel gear pressing plate (9).
4. The lower feeding mechanism of sewing machine according to claim 3, characterized in that: and one side of the lower part of the mounting block (15) is provided with a mounting seat (6), and the height of the mounting block (15) is adjusted through the mounting seat (6).
5. The lower feeding mechanism of sewing machine according to claim 4, characterized in that: the left side and the right side of the mounting block (15) are respectively provided with a hole and are covered by a cover plate (7).
6. The lower feeding mechanism of sewing machine according to claim 5, characterized in that: the bottom of the mounting block (15) is provided with a lower pressing plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922430504.8U CN211872253U (en) | 2019-12-30 | 2019-12-30 | Lower feeding mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922430504.8U CN211872253U (en) | 2019-12-30 | 2019-12-30 | Lower feeding mechanism of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211872253U true CN211872253U (en) | 2020-11-06 |
Family
ID=73263382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922430504.8U Active CN211872253U (en) | 2019-12-30 | 2019-12-30 | Lower feeding mechanism of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211872253U (en) |
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2019
- 2019-12-30 CN CN201922430504.8U patent/CN211872253U/en active Active
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