CN209873298U - Sewing machine and feed dog adjustment mechanism thereof - Google Patents
Sewing machine and feed dog adjustment mechanism thereof Download PDFInfo
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- CN209873298U CN209873298U CN201822154251.1U CN201822154251U CN209873298U CN 209873298 U CN209873298 U CN 209873298U CN 201822154251 U CN201822154251 U CN 201822154251U CN 209873298 U CN209873298 U CN 209873298U
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- feed
- eccentric wheel
- sewing machine
- sliding block
- feed dog
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Abstract
The utility model relates to a sewing machine and feed dog adjustment mechanism thereof, when the sewing machine and the feed dog adjustment mechanism thereof are used for sewing operation, when the operation rhythm of the sewing machine needs to be adjusted, the sliding block slides along the sliding groove to separate the meshing gear teeth from the fixed gear, and then the main shaft and the feed eccentric wheel rotate a certain angle relative to the feed eccentric wheel, so that the angle between the feed eccentric wheel and the feed eccentric wheel can be adjusted; then the sliding block is released, and the return spring presses the sliding block to the fixed gear so that the meshing gear teeth are meshed with the fixed gear; after the angle between the feed lifting eccentric wheel and the feed feeding eccentric wheel is adjusted, when the sewing machine performs sewing operation, the feed lifting eccentric wheel and the feed feeding eccentric wheel can move in a new phase relation, and the sewing operation rhythm of the sewing machine can be adjusted.
Description
Technical Field
The utility model relates to a sewing machine and feed dog adjustment mechanism thereof belongs to sewing machine and makes technical field.
Background
As shown in fig. 1, the feed dog of the conventional feed mechanism forms a feed trajectory similar to an ellipse by the combined action of the horizontal swing and the vertical lifting dog. The lifting tooth eccentric wheel 3 and the main shaft 1 are of an integrated structure, the swing in the horizontal direction is composed of a cloth feeding eccentric wheel 3 which is fixed on the main shaft 1, the eccentric amount of the cloth feeding eccentric wheel is adjustable, the cloth feeding eccentric wheel 3 and the cloth feeding eccentric wheel 2 have a certain relative angle relative to the lifting tooth eccentric wheel 3, the cloth feeding eccentric wheel 3 and the cloth feeding eccentric wheel 2 act on the cloth feeding tooth together through an intermediate transmission part, and the purpose of sewing is achieved. The upper layer cloth and the lower layer cloth are easy to be staggered, the same machine cannot simultaneously meet the sewing defects of knitting and tatting, no wrinkles of the cloth, low cloth feeding efficiency and the like. Therefore, the cloth feeding mechanism cannot adjust the feed lifting tooth angle of the cloth feeding track in the using process, and the application range of the cloth feeding mechanism is narrow.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a sewing machine and a feed dog adjusting mechanism thereof, which can conveniently adjust the operation rhythm of the sewing machine.
In order to achieve the above object, the utility model provides a feed dog adjustment mechanism of sewing machine adopts following technical scheme: a cloth feeding tooth adjusting mechanism of a sewing machine comprises a main shaft, a cloth feeding eccentric wheel and a tooth lifting eccentric wheel, wherein the cloth feeding eccentric wheel and the tooth lifting eccentric wheel are connected to the main shaft; the feed lifting eccentric wheel is used for driving the feed dog to reciprocate up and down, and the feed conveying eccentric wheel is used for driving the feed dog to reciprocate along the feed direction; the lifting tooth eccentric wheel is fixed on a first side surface of a connecting disc, the connecting disc and the lifting tooth eccentric wheel are rotatably sleeved on the main shaft, a sliding groove is formed in a second side surface of the connecting disc, a sliding block is connected in the sliding groove, and a section of meshing gear teeth are formed in the sliding block; the main shaft is connected with a fixed gear, the sliding block is connected with a return spring, and the return spring presses the sliding block to the fixed gear so as to enable the meshing gear teeth to be meshed with the fixed gear.
Preferably, the adjusting device further comprises an adjusting button, wherein a pressing column is arranged on the adjusting button, and the end part of the pressing column is aligned with one end of the sliding block; pressing the adjusting button, wherein the pressing column abuts against the sliding block and pushes the sliding block to move along the sliding chute, so that the meshing gear teeth are separated from the fixed gear; when the adjusting button is released, the return spring drives the sliding block to press the fixed gear so as to enable the meshing gear teeth to be meshed with the fixed gear.
More preferably, the end of the sliding block opposite to the connecting column is provided with a section of arc surface.
Preferably, the sliding block is provided with a long slot hole, and the main shaft penetrates through the long slot hole.
Preferably, the connecting disc is provided with two connecting columns perpendicular to the connecting disc, the two connecting columns are respectively positioned on two sides of the sliding chute, the return spring is a tension spring, and two ends of the return spring are respectively connected to the two connecting columns; and the sliding block is provided with a connecting groove, and the return spring is tied in the connecting groove.
More preferably, a limiting column extending along the radial direction of the fixed gear is arranged on the fixed gear, and the limiting column is located between the two connecting columns.
Preferably, the tooth lifting eccentric wheel and the connecting disc are of an integral structure.
Preferably, the connecting disc is provided with a positioning groove, when the adjusting button is pressed down, one part of the pressing column is clamped in the positioning groove, and the other part of the pressing column is pressed on the sliding block.
Preferably, the upper end of the pressing column is connected with a pressing plate, the pressing column is sleeved with a compression spring, the upper end of the compression spring abuts against the lower surface of the pressing plate, and the lower end of the compression spring abuts against the rack.
With the utility model discloses a sewing machine's feed dog adjustment mechanism correspondingly, the utility model also provides a sewing machine, including above-mentioned technical scheme or its arbitrary preferred technical scheme sewing machine's feed dog adjustment mechanism.
As mentioned above, the utility model relates to a sewing machine and feed dog adjustment mechanism thereof has following beneficial effect: when the sewing machine and the cloth feeding cam adjusting mechanism thereof are utilized to perform sewing operation and the operation rhythm of the sewing machine needs to be adjusted, the sliding block slides along the sliding chute to separate the meshing gear teeth from the fixed gear, and then the main shaft and the cloth feeding cam are rotated for a certain angle relative to the lifting cam, so that the angle between the lifting cam and the cloth feeding cam can be adjusted; then the sliding block is released, and the return spring presses the sliding block to the fixed gear so that the meshing gear teeth are meshed with the fixed gear; after the angle between the feed lifting eccentric wheel and the feed feeding eccentric wheel is adjusted, when the sewing machine performs sewing operation, the feed lifting eccentric wheel and the feed feeding eccentric wheel can move in a new phase relation, and the sewing operation rhythm of the sewing machine can be adjusted. The utility model discloses a sewing machine also has above-mentioned beneficial effect of course, and the here is no longer repeated.
Drawings
Fig. 1 is a schematic structural view of a feed dog adjusting mechanism in the prior art.
Fig. 2 is a schematic structural view of a feed dog adjusting structure of a sewing machine according to the present invention, and a compression spring and a frame are not shown.
Fig. 3 is a schematic structural view of a feed dog adjusting structure of a sewing machine according to the present invention.
Fig. 4 is a schematic structural diagram of the connecting disc and the tooth lifting eccentric wheel.
FIG. 5 is a schematic diagram of a slider.
Description of the element reference numerals
1 spindle
2 cloth feeding eccentric wheel
3 eccentric cam of lifting tooth
4 connecting disc
5 first side surface
6 second side surface
7 chute
8 sliding block
9 meshing gear teeth
10 fixed gear
11 return spring
12 adjustment button
13 pressing column
14 arc surface
15 slotted hole
16 connecting column
17 connecting groove
18 spacing post
19 positioning groove
20 pressing plate
21 compression spring
22 frame
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 2 and 3, the utility model provides a feed dog adjusting mechanism of sewing machine, comprising a main shaft 1, a feed eccentric wheel 2 and a feed lifting eccentric wheel 3 connected to the main shaft 1, wherein the main shaft 1 is driven by a driving mechanism to drive the feed eccentric wheel 2 and the feed lifting eccentric wheel 3 to rotate; the feed lifting eccentric wheel 3 is used for driving the feed dog to reciprocate up and down, and the feed conveying eccentric wheel 2 is used for driving the feed dog to reciprocate along the feed direction; the lifting tooth eccentric wheel 3 is fixed on a first side surface 5 of a connecting disc 4, the connecting disc 4 and the lifting tooth eccentric wheel 3 are rotatably sleeved on the main shaft 1, a sliding groove 7 is arranged on a second side surface 6 of the connecting disc 4, a sliding block 8 is connected in the sliding groove 7, and a section of meshing gear teeth 9 are arranged on the sliding block 8; a fixed gear 10 is connected to the main shaft 1, the sliding block 8 is connected to a return spring 11, and the return spring 11 presses the sliding block 8 against the fixed gear 10 to engage the engaging gear 9 with the fixed gear 10.
When the feed dog adjusting mechanism of the sewing machine of the utility model is used for sewing operation and the operation rhythm of the sewing machine needs to be adjusted, please refer to fig. 3, the sliding block 8 slides along the sliding chute 7 to separate the meshing gear teeth 9 from the fixed gear 10, and then the main shaft 1 and the feed eccentric wheel 2 rotate a certain angle relative to the feed eccentric wheel 3, so that the angle between the feed eccentric wheel 3 and the feed eccentric wheel 2 can be adjusted; then, the sliding block 8 is released, and the return spring 11 presses the sliding block 8 to the fixed gear 10 to enable the meshing gear 9 to be meshed with the fixed gear 10; after the angle between the feed lifting eccentric wheel 3 and the feed conveying eccentric wheel 2 is adjusted, when the sewing machine performs sewing operation, the feed lifting eccentric wheel 3 and the feed conveying eccentric wheel 2 move in a new phase relation, and the sewing operation rhythm of the sewing machine can be adjusted.
The utility model discloses an among sewing machine's feed dog adjustment mechanism, through adjusting the angle between feed dog eccentric wheel 3 and the feed eccentric wheel 2 to make the motion phase relation between feed dog eccentric wheel 3 and the feed eccentric wheel 2 adjust, just so adjusted sewing machine's operation rhythm. The cam 3 is connected to the connecting plate 4, as shown in fig. 4, and as a preferred embodiment, the cam 3 and the connecting plate 4 are integrated, the cam 3 is connected to a first side 5 of the connecting plate 4, and the sliding groove 7 is arranged on a second side 6 of the connecting plate 4. Of course, the cam 3 and the connecting plate 4 may be provided separately and then fixed together.
When the angle between the feed lifting eccentric 3 and the feed conveying eccentric 2 is adjusted, the feed lifting eccentric 3 is kept stationary, and the main shaft 1 is rotated to rotate the main shaft 1 and the feed conveying eccentric 2 together, thereby adjusting the angle between the feed lifting eccentric 3 and the feed conveying eccentric 2. As a preferred embodiment, as shown in fig. 3, the sewing machine and the feed dog adjusting mechanism of the present invention further include an adjusting button 12, the adjusting button 12 is provided with a pressing column 13, and an end of the pressing column 13 is aligned with one end of the sliding block 8; pressing the adjusting button 12, the pressing column 13 abuts on the sliding block 8 and pushes the sliding block 8 to move along the sliding chute 7, so that the meshing gear 9 is disengaged from the fixed gear 10; when the meshing gear 9 is separated from the fixed gear 10, the main shaft 1 can rotate relative to the feed lifting eccentric wheel 3 and the connecting disc 4, and at the moment, the main shaft 1 can be rotated to adjust the angle between the feed conveying eccentric wheel 2 and the feed lifting eccentric wheel 3; when the angle between the feed cam 2 and the feed cam 3 is adjusted to a predetermined value, the adjustment button 12 is released, and the return spring 11 drives the slide 8 to press against the fixed gear 10, so that the engagement gear 9 engages with the fixed gear 10, and at this time, the feed cam 3 cannot rotate relative to the main shaft 1. In order to make the pressing column 13 contact the sliding block 8 well, the end of the sliding block 8 opposite to the connecting column 16 preferably has a circular arc surface 14. When the adjustment button 12 is pressed, the lower end of the pressing post 13 abuts against the arc surface 14.
As described above, when the angle between the feed lifting eccentric 3 and the feed conveying eccentric 2 is adjusted, the feed lifting eccentric 3 is kept stationary, and the main shaft 1 is rotated to rotate the main shaft 1 and the feed conveying eccentric 2 together, thereby adjusting the angle between the feed lifting eccentric 3 and the feed conveying eccentric 2. In a preferred embodiment, as shown in fig. 4, the connecting plate 4 is provided with a positioning groove 19, and referring to fig. 3, the axis of the pressing column 13 substantially coincides with the second side surface 6 of the connecting plate 4, and when the adjusting button 12 is pressed, a part of the pressing column 13 is caught in the positioning groove 19, thereby preventing the connecting plate 4 and the feed cam 3 from rotating, while another part of the pressing column 13 is pressed against the sliding block 8, thereby moving the sliding block 8 downward, disengaging the engaging gear 9 from the fixed gear 10, and enabling the main shaft 1 and the feed cam 2 to rotate relative to the feed cam 3.
When adjusting the angle between the feed cam 2 and the feed cam 3, the sliding block 8 can be pressed by means of the adjusting knob 12, so that the sliding block 8 is moved in the sliding groove 7. As a preferred embodiment, as shown in fig. 5, the sliding block 8 is provided with a long slot 15, referring to fig. 3, the rotating shaft passes through the long slot 15, the sliding block 8 is symmetrical, and the left and right sides of the sliding block 8 are slidably engaged with the left and right sides of the sliding slot 7.
The utility model discloses an among sewing machine's feed dog adjustment mechanism, be connected with reset spring 11 on the sliding block 8, under reset spring 11's effect, reset spring 11 makes the meshing teeth of a cogwheel 9 on the sliding block 8 compress tightly and the meshing is in the same place with fixed gear 10, presses down during adjustment button 12, meshing teeth of a cogwheel 9 just breaks away from with fixed gear 10, when loosening adjustment button 12, reset spring 11 again with meshing teeth of a cogwheel 9 to fixed gear 10. As a preferred embodiment, as shown in fig. 3, two connection posts 16 perpendicular to the connection plate 4 are arranged on the connection plate 4, the two connection posts 16 are respectively located at two sides of the sliding chute 7, the return spring 11 is a tension spring, and two ends of the return spring 11 are respectively connected to the two connection posts 16; referring to fig. 3 and 5, the sliding block 8 is provided with a connecting slot 17, and the return spring 11 is tightened in the connecting slot 17. The return spring 11 is in tension and the return spring 11 pushes the meshing toothing 9 on the sliding block 8 towards the fixed toothing 10.
In order to prevent the main shaft 1 from rotating too much relative to the feed cam 3 when adjusting the angle between the feed cam 2 and the feed cam 3, the range of rotation of the main shaft 1 relative to the feed cam 3 needs to be limited. Preferably, as shown in fig. 3, the fixed gear 10 is provided with a limiting column 18 extending along the radial direction thereof, and the limiting column 18 is located between the two connecting columns 16. In this way, the limiting column 18 can only rotate between the two connecting columns 16, so that the range of rotation of the spindle 1 relative to the feed cam 3 is limited.
The utility model discloses an among sewing machine's feed dog adjustment mechanism, can make through pressing adjustment button 12 and press post 13 to reciprocate, after loosening adjustment button 12, press post 13 and resume to original position again, as shown in fig. 3, as a preferred embodiment, the upper end of pressing post 13 is connected with a pressing plate 20, and the cover has a compression spring 21 on pressing post 13, and compression spring 21's upper end top is on pressing plate 20's lower surface, and compression spring 21's lower extreme supports on frame 22. Thus, when the adjustment button 12 is released, the compression spring 21 pushes up the pressing plate 20, thereby restoring the adjustment button 12.
With the utility model discloses a sewing machine's feed dog adjustment mechanism correspondingly, the utility model also provides a sewing machine, including above-mentioned technical scheme or its arbitrary preferred technical scheme sewing machine's feed dog adjustment mechanism.
Based on the technical scheme of above-mentioned embodiment, the utility model discloses a relative angle between feed eccentric wheel 2 and the feed lifting teeth eccentric wheel 3 can conveniently be adjusted to sewing machine's feed lifting teeth adjustment mechanism to adjust the two motion phase place, make sewing machine's sewing operation rhythm can adjust. The utility model discloses a feed dog adjustment mechanism of sewing machine can be simple and convenient quick, accurate adjust feed dog about lift eccentric for main shaft 1's phase place, and the mechanism is simple, realizes under the condition of not changing main shaft 1, the eccentric regulation of lift dog about the easy realization feed dog, realizes the phase relation between different lift dog and thorn cloth or the fore-and-aft swing, makes up the defect more than effectively improving. The utility model discloses a sewing machine includes the utility model discloses a sewing machine's feed dog adjustment mechanism also has above-mentioned technological effect certainly, and here is no longer repeated.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A cloth feeding tooth adjusting mechanism of a sewing machine comprises a main shaft (1), a cloth feeding eccentric wheel (2) and a tooth lifting eccentric wheel (3) which are connected to the main shaft (1), wherein the main shaft (1) is driven by a driving mechanism to drive the cloth feeding eccentric wheel (2) and the tooth lifting eccentric wheel (3) to rotate; the feed lifting eccentric wheel (3) is used for driving the feed dog to reciprocate up and down, and the feed conveying eccentric wheel (2) is used for driving the feed dog to reciprocate along the feed direction; it is characterized in that the utility model is characterized in that,
the lifting tooth eccentric wheel (3) is fixed on a first side surface (5) of a connecting disc (4), the connecting disc (4) and the lifting tooth eccentric wheel (3) are rotatably sleeved on the main shaft (1), a sliding groove (7) is arranged on a second side surface (6) of the connecting disc (4), a sliding block (8) is connected in the sliding groove (7), and a section of meshing gear teeth (9) is arranged on the sliding block (8); the main shaft (1) is connected with a fixed gear (10), the sliding block (8) is connected with a return spring (11), and the return spring (11) presses the sliding block (8) to the fixed gear (10) to enable the meshing gear teeth (9) to be meshed with the fixed gear (10).
2. The feed dog adjusting mechanism of a sewing machine according to claim 1, characterized in that: the sliding block is characterized by further comprising an adjusting button (12), wherein a pressing column (13) is arranged on the adjusting button (12), and the end part of the pressing column (13) is aligned with one end of the sliding block (8); pressing the adjusting button (12), wherein the pressing column (13) abuts against the sliding block (8) and pushes the sliding block (8) to move along the sliding chute (7), so that the meshing gear teeth (9) are disengaged from the fixed gear (10); when the adjusting button (12) is released, the return spring (11) drives the sliding block (8) to press the fixed gear (10) so that the meshing gear teeth (9) are meshed with the fixed gear (10).
3. The feed dog adjusting mechanism of a sewing machine according to claim 2, characterized in that: one end of the sliding block (8) opposite to the connecting column (16) is provided with a section of arc surface (14).
4. The feed dog adjusting mechanism of a sewing machine according to claim 1, characterized in that: a long slotted hole (15) is formed in the sliding block (8), and the main shaft (1) penetrates through the long slotted hole (15).
5. The feed dog adjusting mechanism of a sewing machine according to claim 1, characterized in that: two connecting columns (16) perpendicular to the connecting disc (4) are arranged on the connecting disc (4), the two connecting columns (16) are respectively positioned on two sides of the sliding groove (7), the return spring (11) is a tension spring, and two ends of the return spring (11) are respectively connected to the two connecting columns (16); the sliding block (8) is provided with a connecting groove (17), and the return spring (11) is tied in the connecting groove (17).
6. The feed dog adjusting mechanism of a sewing machine according to claim 5, characterized in that: a limiting column (18) extending along the radial direction of the fixed gear (10) is arranged on the fixed gear, and the limiting column (18) is located between the two connecting columns (16).
7. The feed dog adjusting mechanism of a sewing machine according to claim 1, characterized in that: the feed lifting eccentric wheel (3) and the connecting disc (4) are of an integrated structure.
8. The feed dog adjusting mechanism of a sewing machine according to claim 2, characterized in that: a positioning groove (19) is formed in the connecting disc (4), when the adjusting button (12) is pressed down, one part of the pressing column (13) is clamped in the positioning groove (19), and the other part of the pressing column is pressed on the sliding block (8).
9. The feed dog adjusting mechanism of a sewing machine according to claim 2, characterized in that: the upper end of the pressing column (13) is connected with a pressing plate (20), the pressing column (13) is sleeved with a compression spring (21), the upper end of the compression spring (21) is propped against the lower surface of the pressing plate (20), and the lower end of the compression spring (21) is propped against the rack (22).
10. A sewing machine characterized by comprising the feed dog adjusting mechanism of the sewing machine according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154251.1U CN209873298U (en) | 2018-12-21 | 2018-12-21 | Sewing machine and feed dog adjustment mechanism thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154251.1U CN209873298U (en) | 2018-12-21 | 2018-12-21 | Sewing machine and feed dog adjustment mechanism thereof |
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| Publication Number | Publication Date |
|---|---|
| CN209873298U true CN209873298U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822154251.1U Active CN209873298U (en) | 2018-12-21 | 2018-12-21 | Sewing machine and feed dog adjustment mechanism thereof |
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| Country | Link |
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| CN (1) | CN209873298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826812A (en) * | 2020-07-30 | 2020-10-27 | 任丘市谦吉模具有限公司 | High-precision textile sewing machine |
-
2018
- 2018-12-21 CN CN201822154251.1U patent/CN209873298U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826812A (en) * | 2020-07-30 | 2020-10-27 | 任丘市谦吉模具有限公司 | High-precision textile sewing machine |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |