CN107558015B - Sewing machine and needle pitch adjusting mechanism thereof - Google Patents
Sewing machine and needle pitch adjusting mechanism thereof Download PDFInfo
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- CN107558015B CN107558015B CN201710993322.4A CN201710993322A CN107558015B CN 107558015 B CN107558015 B CN 107558015B CN 201710993322 A CN201710993322 A CN 201710993322A CN 107558015 B CN107558015 B CN 107558015B
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Abstract
The invention relates to a sewing machine and a needle pitch adjusting mechanism thereof, when the needle pitch adjusting mechanism of the sewing machine is used for adjusting the needle pitch, only a sliding block needs to be moved to separate meshing teeth on a connecting block from a transmission gear, then a connecting disc is rotated, a shaft sleeve which is eccentrically arranged relative to a main shaft on the connecting disc can stir a rotating sleeve and a driving connecting rod to rotate together around a pin shaft which is parallel to the main shaft, so that the eccentric amount of the rotating center of the driving connecting rod relative to the main shaft is adjusted, and the transmission relation between the main shaft and a cloth feeding tooth can be adjusted; the movement of the main shaft is not changed, so that the transmission relation between the main shaft and the feed dog is adjusted by adjusting the eccentric amount of the rotating center of the driving connecting rod relative to the main shaft, the moving distance of the feed dog each time is further adjusted, and finally the needle pitch is adjusted.
Description
Technical Field
The invention relates to a sewing machine and a needle pitch adjusting mechanism thereof, belonging to the technical field of industrial sewing machines.
Background
When the sewing machine performs sewing operation, the feed dog reciprocates to move the cloth forward, and the needle performs one sewing operation each time the feed dog moves the cloth forward by a certain distance, so that the size of the needle pitch sewn on the cloth is determined by the distance moved by the feed dog each time. The size of the needle pitch can be adjusted by adjusting the distance of each movement of the feed dog. In the prior art, there are some mechanisms that can be used to adjust the gauge, such as the feeding assembly of the prior chinese patent application No. 20102065187.8. However, the stitch length adjusting mechanisms of these sewing machines in the prior art are complicated in structure, inconvenient to operate and not suitable for some sewing machines.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a sewing machine and a needle pitch adjusting mechanism thereof, which has a simple structure and can conveniently adjust the needle pitch.
In order to achieve the purpose, the invention provides a needle pitch adjusting mechanism of a sewing machine, which adopts the following technical scheme: a needle pitch adjusting mechanism of a sewing machine comprises a cloth feeding tooth, a main shaft and a driving connecting rod, wherein the driving connecting rod is in transmission connection with the cloth feeding tooth, and the driving connecting rod is driven by the main shaft to drive the cloth feeding tooth to reciprocate; the main shaft is provided with a connecting disc and a transmission gear, a central hole in the connecting disc is rotatably connected with the main shaft, and the transmission gear is fixedly connected with the main shaft; a shaft sleeve eccentrically arranged relative to the main shaft is arranged on one side face of the connecting disc, a rotating sleeve is sleeved on the shaft sleeve, a first sliding groove is formed in the rotating sleeve, the shaft sleeve is inserted into the first sliding groove and can slide along the first sliding groove, and the driving connecting rod is rotatably sleeved on the rotating sleeve; the other side surface of the connecting disc is provided with a second sliding chute with the extending direction vertical to the main shaft; a sliding block is arranged in the second sliding groove, one end of the sliding block is provided with a connecting block, a section of meshing teeth meshed with the transmission gear is arranged on the connecting block, and an elastic element for pressing the connecting block towards the transmission gear is arranged on the connecting disc; the transmission gear is provided with a pin shaft parallel to the main shaft, and the end part of the pin shaft is inserted into a pin hole on the side surface of the rotating sleeve and is in rotating fit with the pin hole.
Preferably, the main shaft is driven by a driving mechanism to oscillate reciprocally.
Preferably, the second sliding groove extends along the diameter direction of the connecting disc, and two side walls of the second sliding groove are parallel to each other and have the same distance with the axis of the main shaft.
Preferably, a through hole for the main shaft to pass through is formed in the sliding block, and the extending direction of the through hole is consistent with the extending direction of the second sliding chute; the end part of the pin shaft penetrates through the through hole and is inserted into the pin hole in the side face of the rotating sleeve.
Preferably, an arc-shaped hole is formed in the connecting disc, and the pin shaft sequentially penetrates through the through hole and the arc-shaped hole and is inserted into a pin hole in the side face of the rotating sleeve.
Preferably, the two side walls of the through hole are parallel to each other and have the same distance with the axis of the spindle.
Preferably, the other end of the sliding block is provided with a pressing groove, a cover plate is arranged above the main shaft, a pressing head capable of moving up and down is arranged on the cover plate, and the connecting disc can rotate to a position where the pressing groove is opposite to the lower end of the pressing head.
Preferably, the elastic element is an elastic steel wire, a groove is formed in the connecting block, one end of the elastic steel wire is fixed to the connecting disc, and the other end of the elastic steel wire is pressed in the groove in the connecting block.
Preferably, a roller bearing is sleeved on the rotating sleeve, and the driving connecting rod is sleeved on the roller bearing.
The invention also provides a sewing machine corresponding to the needle pitch adjusting mechanism of the sewing machine, which comprises the needle pitch adjusting mechanism of the sewing machine or any preferable technical scheme.
As described above, the sewing machine and the needle pitch adjusting mechanism thereof according to the present invention have the following advantages: when the needle pitch adjusting mechanism of the sewing machine is used for adjusting the needle pitch, only the sliding block needs to be moved to separate the meshing teeth on the connecting block from the transmission gear, then the connecting disc is rotated, and the shaft sleeve eccentrically arranged on the connecting disc relative to the main shaft can stir the rotating sleeve and the driving connecting rod to rotate together around the pin shaft parallel to the main shaft, so that the eccentric amount of the rotating center of the driving connecting rod relative to the main shaft is adjusted, and the transmission relation between the main shaft and the cloth feeding teeth can be adjusted; the movement of the main shaft is not changed, so that the transmission relation between the main shaft and the feed dog is adjusted by adjusting the eccentric amount of the rotating center of the driving connecting rod relative to the main shaft, the moving distance of the feed dog each time is further adjusted, and finally the needle pitch is adjusted. Therefore, the needle pitch adjusting mechanism of the sewing machine can adjust the needle pitch of the sewing machine, and is simple in structure and easy to operate.
Drawings
FIG. 1 is a schematic view of a feed dog transmission mechanism of a sewing machine;
FIG. 2 is a front view of a feed dog driving mechanism of the sewing machine shown in FIG. 1;
FIG. 3 is an exploded view of the spindle, drive gear, coupling disk, slide block, rotating sleeve, roller bearing and drive link;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 5 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 6 is a perspective view from the side of the connection pad;
FIG. 7 is a perspective view from the other side of the connection pad;
FIG. 8 is a perspective view of a slider;
description of the element reference numerals
1 feed dog 19 pressing groove
2 main shaft 20 cover plate
3 active connecting rod 21 pressing head
4 driven crank arm 22 groove
5 connecting disc 23 roller bearing
6 drive gear 24 connecting shaft
7 shaft sleeve 25 connecting crank arm
8 rotating sleeve 26 transmission connecting rod
9 first chute 27 feed shaft
10 secondary runner 28 auxiliary shaft
11 slide 29 auxiliary main link
12 auxiliary crank arm of connecting block 30
13 meshing teeth 31 driving shaft
14 central hole of elastic element 32
15 pin 33 return spring
16 pin hole 34 press cap
17 via 35 rod part
18 arc hole 36 circlip
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 and 2, in a feed dog 1 transmission mechanism of a sewing machine, a driving shaft 31 is connected with a motor, the motor drives the driving shaft 31 to rotate in a reciprocating manner at a certain angle, a main shaft 2 is connected with the driving shaft 31, and the driving shaft 31 drives the main shaft 2 to rotate in a reciprocating manner at a certain angle; the motor and the driving shaft 31 are driving mechanisms of the main shaft 2, and the main shaft 2 is driven by the driving mechanisms to rotate in a reciprocating manner at a certain angle; the main shaft 2 is provided with a driving connecting rod 3 and an auxiliary main connecting rod 29, and the driving connecting rod 3 and the auxiliary main connecting rod 29 are eccentrically arranged relative to the main shaft 2. The driving connecting rod 3 is connected with the cloth feeding shaft 27 through the driven crank arm 4, when the main shaft 2 rotates in a reciprocating way, one end of the driving connecting rod 3 connected with the main shaft 2 is driven to rotate in a reciprocating way relative to the axis of the main shaft 2 according to a certain angle, the other end of the driving connecting rod 3 drives the driven crank arm 4 to swing in a reciprocating way according to a certain angle, thereby driving the cloth feeding shaft 27 to do reciprocating rotation motion according to a certain angle, the cloth feeding shaft 27 is in transmission connection with the cloth feeding dog 1, the cloth feeding shaft 27 rotates in a reciprocating way to drive the cloth feeding dog 1 to do reciprocating motion along the direction indicated by the arrow at the cloth feeding dog 1 in figure 1 (the cloth feeding dog 1 has a back-and-forth reciprocating motion component along the direction indicated by the arrow at the cloth feeding dog 1 in figure 1, the back-and-forth reciprocating motion component is generated by the cloth feeding shaft 27 driving the transmission mechanism between the cloth feeding shaft 27 and the cloth feeding dog 1), the cloth is moved by a certain distance by the cloth feeding dog 1 after each reciprocating motion, and the distance determines the size of the needle pitch. Similar to the transmission principle of the cloth feeding shaft 27, the auxiliary main connecting rod 29 is connected with the auxiliary shaft 28 through the auxiliary crank arm 30, the auxiliary shaft 28 is driven to do reciprocating rotation motion when the main shaft 2 rotates in a reciprocating mode, the auxiliary shaft 28 is in transmission connection with the cloth feeding tooth 1, the auxiliary shaft 28 rotates in a reciprocating mode to drive the cloth feeding tooth 1 to do up-and-down reciprocating motion (the cloth feeding tooth 1 has an up-and-down reciprocating motion component, the up-and-down reciprocating motion component is generated by the cloth feeding shaft 27 driving a transmission mechanism between the auxiliary shaft 28 and the cloth feeding tooth 1), the up-and-down reciprocating motion provides cloth supporting or directional auxiliary motion for the cloth conveyed by the cloth feeding tooth 1, and the cloth feeding tooth 1 does up-and-down reciprocating motion when doing back-and-forth reciprocating motion, so that the cloth is conveyed forward for a certain distance. The driving shaft 31 has an eccentric section (not shown) eccentrically disposed with respect to the axis of the driving shaft 31, the eccentric section being connected to the upper end of the transmission link 26, the lower end of the transmission link 26 being connected to the left end of the connecting crank arm 25, and the right end of the connecting crank arm 25 being connected to the connecting shaft. When the driving shaft 31 rotates, the driving link 26 is driven to reciprocate up and down, so that the left end of the connecting crank arm is driven to swing up and down, and the connecting shaft 24 is driven to rotate in a reciprocating manner.
As shown in fig. 1 to 3, the invention provides a needle pitch adjusting mechanism of a sewing machine, comprising a feed dog 1, a main shaft 2 and a driving connecting rod 3, wherein the driving connecting rod 3 is in transmission connection with the feed dog 1, and the driving connecting rod 3 is driven by the main shaft 2 to drive the feed dog 1 to reciprocate; the main shaft 2 is provided with a connecting disc 5 and a transmission gear 6, a central hole 32 (shown in figures 6 and 7) on the connecting disc 5 is rotatably connected with the main shaft 2, and the transmission gear 6 is fixedly connected with the main shaft 2; a shaft sleeve 7 (see fig. 7) eccentrically arranged relative to the main shaft 2 is arranged on one side surface of the connecting disc 5, referring to fig. 5, a rotating sleeve 8 is sleeved on the shaft sleeve 7, a first sliding groove 9 is arranged on the rotating sleeve 8, the shaft sleeve 7 is inserted into the first sliding groove 9 and can slide along the first sliding groove 9, and the driving connecting rod 3 is rotatably sleeved on the rotating sleeve 8; referring to fig. 3 and 4, a second sliding groove 10 extending in a direction perpendicular to the main shaft 2 is formed on the other side surface of the connecting disc 5; a sliding block 11 is arranged in the second sliding groove 10, one end of the sliding block 11 is provided with a connecting block 12, a section of meshing teeth 13 meshed with the transmission gear 6 are arranged on the connecting block 12, and an elastic element 14 for pressing the connecting block 12 towards the transmission gear 6 is arranged on the connecting disc 5; the transmission gear 6 is provided with a pin shaft 15 parallel to the main shaft 2, and the end part of the pin shaft 15 is inserted into a pin hole 16 on the side surface of the rotating sleeve 8 and is in rotating fit with the pin hole 16. When the needle pitch adjusting mechanism of the sewing machine is used for adjusting the needle pitch, please refer to fig. 1 to 4 in combination, only the sliding block 11 needs to be moved to separate the meshing teeth 13 on the connecting block 12 from the transmission gear 6, and then the connecting disc 5 is rotated, referring to fig. 5, the shaft sleeve 7 which is eccentrically arranged relative to the main shaft 2 on the connecting disc 5 can stir the rotating sleeve 8 and the driving connecting rod 3 to rotate together around the pin shaft 15 which is parallel to the main shaft 2, so that the eccentric amount of the rotating center of the driving connecting rod 3 relative to the main shaft 2 is adjusted, and the transmission relation between the main shaft 2 and the feed dog 1 can be adjusted; since the movement of the main shaft 2 is not changed, the transmission relationship between the main shaft 2 and the feed dog 1 is adjusted by adjusting the eccentric amount of the rotation center of the driving connecting rod 3 relative to the main shaft 2, and the distance of each movement of the feed dog 1 is further adjusted, and finally the needle pitch is adjusted. Therefore, the needle pitch adjusting mechanism of the sewing machine can adjust the needle pitch of the sewing machine, and is simple in structure and easy to operate.
According to the stitch length adjusting mechanism of the sewing machine, the eccentric amount of the rotating center of one end, connected with the main shaft 2, of the connecting rod relative to the main shaft 2 is adjusted, so that the parameters of a transmission mechanism between the main shaft 2 and the feed dog 1 are changed, and finally the purpose of adjusting the reciprocating motion amount of the feed dog 1 in the front-back direction and adjusting the stitch length is achieved. Referring to fig. 4, in a working state, the elastic element 14 on the connecting disc 5 presses the sliding block 11 against the transmission gear 6 to enable the meshing teeth 13 on the connecting block 12 to mesh with the transmission gear 6, when the transmission gear 6 rotates, the sliding block 11 and the connecting disc 5 rotate together with the transmission gear 6, referring to fig. 5, the shaft sleeve 7 on the other side of the connecting disc 5 is eccentrically arranged relative to the main shaft 2, the shaft sleeve 7 is inserted into the first sliding groove 9 of the rotating sleeve 8 to stir the rotating sleeve 8 to rotate around the pin shaft 15, and the driving connecting rod 3 also rotates around the pin shaft 15 along with the rotating sleeve 8. Preferably, the first sliding groove 9 may have a kidney shape as shown in fig. 3 and 5, and has two side walls parallel to each other, and the sleeve 7 is sandwiched between and slidable along the two side walls. Referring to fig. 4, the driving connecting rod 3 is hinged to the driven crank arm 4, when the driving connecting rod 3 rotates around the pin 15, the driven crank arm 4 is driven to rotate around the axis of the cloth feeding shaft 27, the cloth feeding shaft 27 is fixedly connected with the driven crank arm 4, the driven crank arm 4 drives the cloth feeding shaft 27 to rotate together, and the cloth feeding shaft 27 is in transmission connection with the cloth feeding dog 1 to drive the cloth feeding dog 1 to move; the main shaft 2 reciprocates to finally drive the feed dog 1 to reciprocate. When the needle pitch needs to be adjusted, please refer to fig. 4, the slide block 11 moves along the second chute 10 on the connecting disc 5 to separate the meshing teeth 13 on the connecting block 12 from the transmission gear 6, then the connecting disc 5 is rotated, please refer to fig. 5, the connecting disc 5 has a central hole 32 (see fig. 6 and fig. 7) in clearance fit with the main shaft 2, the connecting disc 5 rotates around the main shaft 2, the shaft sleeve 7 eccentrically arranged on the connecting disc 5 relative to the main shaft 2 slides in the first chute 9 of the rotating sleeve 8 to toggle the rotating sleeve 8 to rotate around the pin 15, one end of the driving connecting rod 3 connected with the main shaft 2 rotates around the pin 15 along with the rotating sleeve 8, so that the eccentric amount of the end of the driving connecting rod 3 connected with the main shaft 2 relative to the axis of the main shaft 2 is changed, the parameter of the transmission mechanism between the main shaft 2 and the feed dog 1 is changed, and finally the amount of reciprocating motion, so as to adjust the needle pitch. In order to enable the driving connecting rod 3 to rotate flexibly relative to the main shaft 2, preferably, a roller bearing 23 is sleeved on the rotating sleeve 8, and the driving connecting rod 3 is sleeved on the roller bearing 23.
In a needle pitch adjusting mechanism of a sewing machine of the present invention, a coupling tooth 13 on a connecting block 12 is separated from a transmission gear 6 by moving a slider 11 so as to rotate a coupling disk 5. In a preferred embodiment, the second sliding slot 10 extends along a diameter direction of the connecting plate 5, two side walls of the second sliding slot 10 are parallel to each other and have the same distance with an axis of the main shaft 2, and the second sliding slot 10 is symmetrically arranged with respect to the axis of the main shaft 2. Referring to fig. 3, a pin shaft 15 disposed on the transmission gear 6 is connected to a pin hole 16 on the rotating sleeve 8, the pin shaft 15 needs to pass through the sliding block 11 and the connecting disc 5, in order to facilitate the pin shaft 15 to pass through the sliding block 11, a through hole 17 for the main shaft 2 to pass through may be disposed on the sliding block 11, an extending direction of the through hole 17 is the same as an extending direction of the second sliding groove 10, and when the sliding block 11 slides along the second sliding groove 10, the main shaft 2 does not interfere with a side wall of the through hole 17; the end of the pin 15 is inserted through the through hole 17 and into a pin hole 16 in the side of the rotating sleeve 8. Preferably, the two side walls of the through hole 17 are parallel to each other and have the same distance from the axis of the spindle 2. In order to facilitate the pin shaft 15 to penetrate through the connecting disc 5, an arc-shaped hole 18 may be formed in the connecting disc 5, the pin shaft 15 sequentially penetrates through the through hole 17 and the arc-shaped hole 18 and is inserted into the pin hole 16 in the side face of the rotating sleeve 8, and when the connecting disc 5 is rotated, the side wall of the arc-shaped hole 18 does not interfere with the pin shaft 15.
In the needle pitch adjusting mechanism of a sewing machine of the present invention, the slider 11 needs to be moved when adjusting the needle pitch, and in order to facilitate moving the slider 11, as a preferred mode, as shown in fig. 2, a cover plate 20 is provided above the main shaft 2, a pressing head 21 capable of moving up and down is provided on the cover plate 20, referring to fig. 3 and 4, a pressing groove 19 is provided at the other end of the slider 11 (the end opposite to the end of the connecting block 12 on the slider 11), and the connecting disc 5 can be rotated to a position where the pressing groove 19 faces the lower end of the pressing head 21. When the needle pitch needs to be adjusted, the connecting disc 5 is rotated to a position where the pressing groove 19 is opposite to the lower end of the pressing head 21, then the pressing head 21 is pressed downwards to enable the sliding block 11 to move, the meshing teeth 13 on the connecting block 12 are separated from the transmission gear 6, then the connecting disc 5 is rotated to adjust the needle pitch, when the needle pitch is adjusted to be proper, the pressing head 21 is released to enable the sliding block 11 to restore to the initial position under the action of the elastic element 14, and the meshing teeth 13 on the connecting block 12 restore to be meshed with the transmission gear 6. As a preferable mode, as shown in fig. 3 and 4, the elastic member 14 is an elastic steel wire, and the connecting block 12 is provided with a groove 22, one end of the elastic steel wire is fixed on the connecting plate 5, and the other end of the elastic steel wire is pressed in the groove 22 of the connecting block 12. In order to enable the pressing head 21 to automatically reset, the pressing head 21 is provided with a pressing cap 34 with a larger diameter at the top, the pressing cap 34 is provided with a rod part 35 extending downwards at the bottom, a reset spring 33 is sleeved on the rod part 35, the lower end of the rod part 35 penetrates through the cover plate 20, a clamp spring 36 is installed at the lower end of the rod part 35 so that the lower end of a screw cannot penetrate upwards through the cover plate 20, and the clamp spring 36 presses on the lower surface of the cover plate 20.
The invention also provides a sewing machine corresponding to the needle pitch adjusting mechanism of the sewing machine, which comprises the needle pitch adjusting mechanism of the sewing machine or any preferable technical scheme.
Based on the technical scheme of the embodiment, the needle pitch adjusting mechanism of the sewing machine can adjust the needle pitch of the sewing machine, is simple in structure and reasonable in transmission relation, can adjust the needle pitch through simple operation, reduces operation difficulty, and is beneficial to improving operation efficiency.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can 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 needle pitch adjusting mechanism of a sewing machine comprises a cloth feeding tooth (1), a main shaft (2) and a driving connecting rod (3), wherein the driving connecting rod (3) is in transmission connection with the cloth feeding tooth (1), and the driving connecting rod (3) is driven by the main shaft (2) to drive the cloth feeding tooth (1) to reciprocate; it is characterized in that the utility model is characterized in that,
a connecting disc (5) and a transmission gear (6) are arranged on the main shaft (2), a central hole (32) in the connecting disc (5) is rotatably connected with the main shaft (2), and the transmission gear (6) is fixedly connected with the main shaft (2);
a shaft sleeve (7) which is eccentrically arranged relative to the main shaft (2) is arranged on one side face of the connecting disc (5), a rotating sleeve (8) is sleeved on the shaft sleeve (7), a first sliding groove (9) is formed in the rotating sleeve (8), the shaft sleeve (7) is inserted into the first sliding groove (9) and can slide along the first sliding groove (9), and the driving connecting rod (3) is rotatably sleeved on the rotating sleeve (8); the shaft sleeve (7) is inserted into the first sliding groove (9) of the rotating sleeve (8) to toggle the rotating sleeve (8) to rotate around the pin shaft (15), and the driving connecting rod (3) can also rotate around the pin shaft (15) along with the rotating sleeve (8);
the other side surface of the connecting disc (5) is provided with a second sliding chute (10) with the extending direction vertical to the main shaft (2); a sliding block (11) is arranged in the second sliding groove (10), one end of the sliding block (11) is provided with a connecting block (12), a section of meshing teeth (13) meshed with the transmission gear (6) are arranged on the connecting block (12), and an elastic element (14) for pressing the connecting block (12) towards the transmission gear (6) is arranged on the connecting disc (5);
the transmission gear (6) is provided with a pin shaft (15) parallel to the main shaft (2), and the end part of the pin shaft (15) is inserted into a pin hole (16) on the side surface of the rotating sleeve (8) and is in rotating fit with the pin hole (16).
2. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: the main shaft (2) is driven by a driving mechanism to swing in a reciprocating manner.
3. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: the second sliding groove (10) extends along the diameter direction of the connecting disc (5), and the two side walls of the second sliding groove (10) are parallel to each other and equal to the distance between the two side walls of the main shaft (2).
4. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: a through hole (17) for the main shaft (2) to pass through is formed in the sliding block (11), and the extending direction of the through hole (17) is consistent with the extending direction of the second sliding chute (10); the end part of the pin shaft (15) penetrates through the through hole (17) and is inserted into a pin hole (16) on the side surface of the rotating sleeve (8).
5. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: an arc-shaped hole (18) is formed in the connecting disc (5), and the pin shaft (15) sequentially penetrates through the through hole (17) and the arc-shaped hole (18) and is inserted into the pin hole (16) in the side face of the rotating sleeve (8).
6. The needle pitch adjusting mechanism of a sewing machine according to claim 4, characterized in that: the two side walls of the through hole (17) are parallel to each other and equal to the distance between the two side walls and the axis of the main shaft (2).
7. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: the other end of the sliding block (11) is provided with a pressing groove (19), a cover plate (20) is arranged above the main shaft (2), a pressing head (21) capable of moving up and down is arranged on the cover plate (20), and the connecting disc (5) can rotate to a position where the pressing groove (19) is right opposite to the lower end of the pressing head (21).
8. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: the elastic element (14) is an elastic steel wire, a groove (22) is formed in the connecting block (12), one end of the elastic steel wire is fixed to the connecting disc (5), and the other end of the elastic steel wire is pressed in the groove (22) in the connecting block (12).
9. The needle pitch adjusting mechanism of a sewing machine according to claim 1, characterized in that: the rotating sleeve (8) is sleeved with a roller bearing (23), and the driving connecting rod (3) is sleeved on the roller bearing (23).
10. A sewing machine comprising the needle pitch adjusting mechanism of the sewing machine according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710993322.4A CN107558015B (en) | 2017-10-23 | 2017-10-23 | Sewing machine and needle pitch adjusting mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710993322.4A CN107558015B (en) | 2017-10-23 | 2017-10-23 | Sewing machine and needle pitch adjusting mechanism thereof |
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| CN107558015A CN107558015A (en) | 2018-01-09 |
| CN107558015B true CN107558015B (en) | 2020-07-07 |
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|---|---|---|---|---|
| CN109371578B (en) * | 2018-12-29 | 2023-10-31 | 杰克科技股份有限公司 | Mechanism for adjusting needle distance of sewing machine and working method thereof |
| CN109594208A (en) * | 2019-01-14 | 2019-04-09 | 安徽杰羽制鞋机械科技有限公司 | A kind of needle gage of sewing machine adjusts and falls automatically feeding structure |
| CN109518364A (en) * | 2019-01-14 | 2019-03-26 | 安徽杰羽制鞋机械科技有限公司 | A kind of needle gage of sewing machine adjusts and falls automatically feeding structure |
| CN111663254A (en) * | 2019-03-05 | 2020-09-15 | 杰克缝纫机股份有限公司 | Sewing machine and needle pitch adjusting structure thereof |
| CN109881376B (en) * | 2019-03-18 | 2021-04-27 | 拓卡奔马机电科技有限公司 | Needle pitch adjusting device and operating method thereof |
| CN109989185B (en) * | 2019-05-08 | 2021-05-28 | 杰克缝纫机股份有限公司 | Control and adjustment method for needle pitch on sewing machine |
| CN110485066B (en) * | 2019-09-12 | 2021-11-30 | 杰克缝纫机股份有限公司 | Cloth feeding adjusting mechanism of sewing machine and sewing machine |
| CN110864618A (en) * | 2019-11-28 | 2020-03-06 | 杰克缝纫机股份有限公司 | Method, device and equipment for detecting needle pitch and storage medium |
| CN114000266B (en) * | 2020-07-28 | 2023-06-09 | 杰克科技股份有限公司 | Adjusting structure in cloth feeding mechanism of sewing machine |
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| JPH09140966A (en) * | 1995-11-28 | 1997-06-03 | Yamato Sewing Mach Co Ltd | Feeder of sewing machine |
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| CN202039191U (en) * | 2010-12-10 | 2011-11-16 | 精机机械厂股份有限公司 | Swinging stroke adjusting device of upper auxiliary cloth feeding claw of sewing machine |
| CN206070127U (en) * | 2016-09-13 | 2017-04-05 | 台州市飞龙机械有限公司 | A kind of work feed component |
| CN106637707A (en) * | 2016-12-19 | 2017-05-10 | 杰克缝纫机股份有限公司 | Cloth feeding mechanism of sewing machine |
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| CN107558015A (en) | 2018-01-09 |
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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. |