CN216274710U - Feeding servo driving mechanism for embroidery machine and cloth conveying mechanism for embroidery machine - Google Patents
Feeding servo driving mechanism for embroidery machine and cloth conveying mechanism for embroidery machine Download PDFInfo
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- CN216274710U CN216274710U CN202122835652.5U CN202122835652U CN216274710U CN 216274710 U CN216274710 U CN 216274710U CN 202122835652 U CN202122835652 U CN 202122835652U CN 216274710 U CN216274710 U CN 216274710U
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Abstract
The utility model discloses a feeding servo driving mechanism for an embroidery machine and a cloth conveying mechanism for the embroidery machine, wherein the feeding servo driving mechanism for the embroidery machine comprises a feeding servo motor and a rotary power output shaft, a speed reducing unit is arranged between the feeding servo motor and the rotary power output shaft, the power shaft is connected with the power input end of the speed reducing unit, and the rotary power output shaft is connected with the power output end of the speed reducing unit. The utility model breaks the limitation of one-stage speed reduction in the existing servo driving mechanism, the speed reduction unit can realize at least two-stage speed reduction, and the transmission ratio is set to be not less than 5:1 on the premise of ensuring the safety and the effectiveness of transmission and prolonging the service life of a belt.
Description
Technical Field
The utility model belongs to the technical field of embroidery machines, and particularly relates to a feeding servo driving mechanism for an embroidery machine and a cloth conveying mechanism for the embroidery machine.
Background
At present, XY feeding of an embroidery machine is basically driven by a feeding servo motor, a conventional embroidery machine servo motor driving mechanism generally comprises the feeding servo motor and a servo transmission box fixedly connected with a feeding servo motor shell, a large belt wheel and a small belt wheel are arranged in the servo transmission box, the small belt wheel is connected with a power shaft of the feeding servo motor, a rotary power output shaft of the large belt wheel is connected with a terminal device, and the small belt wheel and the large belt wheel are in transmission through a belt.
It is known that the closer the driving characteristic of the feeding servo motor is to the rated rotating speed, the more stable the output torque is and the more accurate the control is. However, the rated rotating speed of the feeding servo motor is larger, and the terminal equipment does not need the rotating speed so large, so that the existing feeding servo motor driving mechanism of the embroidery machine can drive the large belt wheel to rotate by using the small belt wheel, and can realize speed reduction output.
The transmission ratio of a feeding servo motor driving mechanism of the existing embroidery machine is mostly only 4:1, and in the feeding process of the embroidery machine, the distance (i.e. the needle pitch) from one needle to the next needle is generally between 0.5 and 6mm, and the feeding time is about 0.06 second; taking the needle pitch as 5mm as an example, the rotating power output shaft of the servo motor driving mechanism of the embroidery machine only rotates 1/20 circles, and the feeding servo motor still does not reach the rated rotating speed of the feeding servo motor at the transmission ratio of 4:1, so that the output torque of the feeding servo motor is not stable enough, the feeding speed of the embroidery machine is influenced, and the stitches are uneven.
In order to keep the rotation of the rotary power output shaft more stable, the rotating speed of the feeding servo motor needs to be increased, that is, the transmission ratio of the driving mechanism of the feeding servo motor needs to be increased. At present, some manufacturers try to increase the transmission ratio to 5:1, but under the condition of primary speed reduction transmission with the transmission ratio of 5:1, the diameter ratio of a large belt wheel and a small belt wheel is also larger, the diameter of the small belt wheel is reduced, the contact area of the small belt wheel and a belt is reduced, the condition of belt slippage or belt fracture is easy to occur, transmission failure is caused, a feeding servo motor idles, and the service life of the belt is short. Therefore, the feeding servo motor driving mechanism with the transmission ratio of 5:1 is mostly used in small equipment at present, and is difficult to be applied to large equipment such as embroidery machines and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a feeding servo driving mechanism for an embroidery machine and a cloth conveying mechanism for the embroidery machine.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a feeding servo driving mechanism for an embroidery machine comprises a feeding servo motor and a rotary power output shaft, wherein a speed reduction unit is arranged between the feeding servo motor and the rotary power output shaft, the power shaft is connected with a power input end of the speed reduction unit, and the rotary power output shaft is connected with a power output end of the speed reduction unit.
The utility model breaks the limitation of one-stage speed reduction in the existing servo driving mechanism, the speed reduction unit can realize at least two-stage speed reduction, the transmission ratio is set to be not less than 5:1 on the premise of ensuring safe and effective transmission and prolonging the service life of a belt, so that the servo driving mechanism is not only suitable for an embroidery machine, but also can greatly improve the rotating speed of a power shaft of a feeding servo motor under the condition of keeping the rotating speed of a rotary power output shaft unchanged, so that the rotating speed is close to or reaches the rated rotating speed, the output torque of the feeding servo motor is ensured to be stable, and the feeding is accurate.
In the feeding servo driving mechanism for the embroidery machine, the transmission ratio of the speed reducing unit is not lower than 6: 1. After the reduction unit is arranged to comprise at least two reduction transmission assemblies which are sequentially connected in series, the space obstruction of the reduction unit is negligible, so that the required transmission ratio can be set according to actual requirements. The utility model has no limit on the upper limit of the transmission ratio, and the rotating speed of the power shaft of the feeding servo motor is more easily approached or reaches the rated rotating speed when the transmission ratio is larger.
In the feeding servo driving mechanism for the embroidery machine, the speed reducing unit comprises a primary speed reducing transmission component connected with a power shaft of the feeding servo motor and a secondary speed reducing transmission component connected with a speed reducing transmission shaft of the primary speed reducing transmission component.
The feeding servo driving mechanism for the embroidery machine further comprises a servo transmission case fixedly connected with a shell of the feeding servo motor, wherein a primary transmission case chamber and a secondary transmission case chamber which are separated from each other are formed in the servo transmission case;
the first-stage speed reduction transmission assembly is arranged in the first-stage transmission case chamber, and the second-stage speed reduction transmission assembly is arranged in the second-stage transmission case chamber.
In foretell embroidery machine is with pay-off servo drive mechanism, one-level speed reduction transmission subassembly include the little action wheel of one-level that is driven by pay-off servo motor's power shaft to and the big follow driving wheel of one-level that has speed reduction transmission shaft, little action wheel of one-level and one-level be equipped with one-level synchronous transmission spare between the big follow driving wheel.
The first-stage small driving wheel is used for driving the first-stage large driven wheel to rotate, and the rotating speed of the speed reduction transmission shaft is slower than that of the power shaft of the feeding servo motor, so that first-stage speed reduction is realized.
In the feeding servo driving mechanism for the embroidery machine, the primary small driving wheel is fixedly arranged on a power shaft of the feeding servo motor; or the first-stage small driving wheel is provided with a first-stage middle shaft which is fixedly connected with a power shaft of the feeding servo motor through a coupler;
at least one of the power shaft of the feeding servo motor and the primary middle shaft is rotatably connected with the servo transmission box through a bearing, and the speed reduction transmission shaft is rotatably connected with the servo transmission box through a bearing.
Preferably, in the feeding servo driving mechanism for an embroidery machine, the primary small driving wheel and the primary large driven wheel are belt wheels, and the primary synchronous transmission part is a synchronous belt.
In the feeding servo driving mechanism for the embroidery machine, the secondary speed reduction transmission assembly comprises a secondary small driving wheel driven by the speed reduction transmission shaft and a secondary large driven wheel with a rotary power output shaft, and a secondary synchronous transmission part is arranged between the secondary small driving wheel and the secondary large driven wheel.
The second-stage small driving wheel is used for driving the second-stage large driven wheel to rotate, and the rotating speed of the rotating power output shaft is slower than that of the speed reduction transmission shaft, so that second-stage speed reduction is realized.
In the feeding servo driving mechanism for the embroidery machine, the secondary small driving wheel is fixedly arranged on the speed reduction transmission shaft; or the second-level small driving wheel is provided with a second-level middle shaft which is fixedly connected with the speed reduction transmission shaft through a coupler;
the speed reduction transmission shaft, the secondary middle shaft and the rotary power output shaft are rotationally connected with the servo transmission box through bearings; or the speed reduction transmission shaft and the rotary power output shaft are rotationally connected with the servo transmission box through bearings.
In the feeding servo driving mechanism for the embroidery machine, the second-stage small driving wheel and the second-stage large driven wheel are belt wheels, and the second-stage synchronous transmission part is a synchronous belt.
In the feeding servo driving mechanism for the embroidery machine, each speed reduction transmission assembly is provided with a tensioning assembly. The tensioning assembly can adjust the relaxation degree of the primary synchronous transmission member and the secondary synchronous transmission member, the specific form of the tensioning assembly is quite various, and a person skilled in the art can select the specific tensioning assembly according to specific needs.
The utility model also discloses an embroidery machine cloth conveying mechanism which comprises a cloth roller and a driving unit for driving the cloth roller to rotate, wherein the driving unit is the feeding servo driving mechanism for the embroidery machine. Compared with the prior art, the utility model has the beneficial effects that:
(1) the utility model breaks the limitation of one-stage speed reduction in the existing servo driving mechanism, the speed reduction unit can realize at least two-stage speed reduction, the transmission ratio is set to be not less than 5:1 on the premise of ensuring safe and effective transmission and prolonging the service life of a belt, so that the servo driving mechanism is not only suitable for an embroidery machine, but also can greatly improve the rotating speed of a power shaft of a feeding servo motor under the condition of keeping the rotating speed of a rotary power output shaft unchanged, so that the rotating speed is close to or reaches the rated rotating speed, the output torque of the feeding servo motor is ensured to be stable, and the feeding is accurate.
(2) In the utility model, after the speed reducing unit is arranged to comprise at least two speed reducing transmission assemblies which are sequentially connected in series, the space obstruction of the speed reducing unit is negligible, so that the required transmission ratio can be set according to actual requirements, and the transmission ratio can be set to be more than 6: 1; the utility model has no limit on the upper limit of the transmission ratio, and the rotating speed of the power shaft of the feeding servo motor is more easily approached or reaches the rated rotating speed when the transmission ratio is larger.
Drawings
Fig. 1 is a schematic structural view of a feeding servo driving mechanism for an embroidery machine according to the present invention;
FIG. 2 is a schematic perspective view of a feeding servo driving mechanism for an embroidery machine according to the present invention;
FIG. 3 is a schematic perspective view of a feeding servo driving mechanism for an embroidery machine according to the present invention at another viewing angle;
fig. 4 is a schematic view of a partial explosion structure of a feeding servo driving mechanism for an embroidery machine according to the present invention;
fig. 5 is an exploded view illustrating a feeding servo driving mechanism for an embroidery machine according to the present invention;
FIG. 6 is a schematic structural diagram of a tensioning assembly in a feeding servo driving mechanism for an embroidery machine of the utility model at another view angle;
fig. 7 is another structural view of a tension assembly of a feeding servo driving mechanism for an embroidery machine of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Example 1
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the feeding servo driving mechanism for an embroidery machine in this embodiment includes a feeding servo motor 1 and a speed reduction unit connected to a power shaft 12 of the feeding servo motor 1, where the speed reduction unit includes at least two speed reduction transmission assemblies connected in series in sequence, and the plurality of speed reduction transmission assemblies can reduce the speed of the power shaft 12 of the feeding servo motor 1 for multiple times, so that the feeding servo motor 1 can reach or approach its rated speed under the condition that the speed after speed reduction is not changed.
The present embodiment will be described in detail by taking an example in which the reduction unit includes two reduction transmission components and has a transmission ratio of 5: 1.
As shown in fig. 1, a servo transmission case 2 is fixedly connected to a housing 11 of a feeding servo motor 1, a primary transmission case chamber 21 and a secondary transmission case chamber 22 which are separated from each other are arranged in the servo transmission case 2, wherein a primary speed reduction transmission assembly 3 is arranged in the primary transmission case chamber 21, and a secondary speed reduction transmission assembly 4 is arranged in the secondary transmission case chamber 22.
As can be seen from fig. 1, 4 and 5, the primary speed reducing assembly 3 and the secondary speed reducing assembly 4 are similar in structure in the present embodiment. Wherein, one-level speed reduction drive assembly 3 includes the little driving wheel 31 of one-level that is driven by pay-off servo motor 1 power shaft 12 to and the big driven wheel 33 of one-level that has speed reduction drive shaft 32, is equipped with one-level synchronous drive spare 34 between little driving wheel 31 of one-level and the big driven wheel 33 of one-level, and pay-off servo motor 1 power shaft 12 and speed reduction drive shaft 32 all rotate with servo transmission case 2 through bearing 5 and are connected.
The second-stage reduction transmission assembly 4 comprises a second-stage small driving wheel 41 driven by the reduction transmission shaft 32 and a second-stage large driven wheel 43 with a rotary power output shaft 42, a second-stage synchronous transmission piece 44 is arranged between the second-stage small driving wheel 41 and the second-stage large driven wheel 43, and the rotary power output shaft 42 is also in rotary connection with the servo transmission box 2 through a bearing 5.
In this embodiment, the primary small driving wheel 31, the primary large driven wheel 33, the secondary small driving wheel 41 and the secondary large driven wheel 43 are belt wheels, and the primary synchronous transmission member 34 and the secondary synchronous transmission member 44 are synchronous belts.
In this embodiment, the linkage between the primary small driving wheel 31 and the power shaft 12 of the feeding servo motor 1 is various. For example, the primary small driving wheel 31 may be directly fixedly connected with the power shaft 12 of the feeding servo motor 1 (as shown in fig. 4 and 5), or may be fixedly connected with the power shaft 12 through a shaft sleeve; or, the primary small driving wheel 31 has a primary middle shaft, that is, the primary small driving wheel 31 is an integral belt wheel with a shaft, and the primary middle shaft of the primary small driving wheel 31 is fixedly connected with the power shaft 12 of the feeding servo motor 2 through a coupling.
Similarly, the primary large driven wheel 33 may be fixedly connected to the reduction transmission shaft 32 directly or through a bushing, or may be integrally provided with the reduction transmission shaft 32, i.e. an integral belt wheel with a shaft.
When the primary small driving wheel 31 is fixedly arranged on the power shaft 12 of the feeding servo motor 2, the power shaft 12 and the speed reduction transmission shaft 32 of the feeding servo motor 2 are rotatably connected with the servo transmission case 2 through the bearing 5, so that the primary small driving wheel 31 and the primary large driven wheel 33 are assembled in the case chamber 21 of the servo transmission case 2.
Similarly, in this embodiment, the second-stage small driving wheel 41 may be directly or fixedly connected to the speed-reducing transmission shaft 32 through a shaft sleeve, or may be integrally disposed with the speed-reducing transmission shaft 32, i.e., an integral belt wheel with a shaft.
The second-stage large driven wheel 43 may be fixedly connected with the rotary power output shaft 42 directly or through a shaft sleeve, or may be integrally arranged with the rotary power output shaft 42, i.e. an integral belt wheel with a shaft.
As shown in fig. 2 and 3, the primary 3 and secondary 4 reduction drive assemblies are each equipped with a tensioning assembly 6. In this embodiment, the structure of each tension assembly 6 is the same, and thus will be described in detail collectively.
As shown in fig. 4, 5 and 6, and as seen in fig. 2 and 3, the tensioning assembly 6 includes a swing seat 61, the swing seat 61 is located outside the primary synchronous transmission element 34 or the secondary synchronous transmission element 44, the swing seat 61 is provided with a rotating shaft 62, and both ends of the rotating shaft 62 are hinged with the servo transmission case 2.
As shown in fig. 3 and 6, the rotating shaft 62 is disposed in the middle of the swing seat 61, and a tension pulley 63 above the rotating shaft 62 is further rotatably connected to the swing seat 61, and the tension pulley 63 abuts against the primary synchronous transmission member 34 or the secondary synchronous transmission member 44; the swing seat 61 is further provided with a tension adjusting structure 64 below the rotating shaft 62.
The tension wheel 63 is rotatably connected to the swinging seat 61, the swinging seat 12 is swingably hinged to the servo transmission case 2, and the primary synchronous transmission member 34 or the secondary synchronous transmission member 44 is tensioned by the abutment of the tension wheel 63 on the swinging seat 61 and the primary synchronous transmission member 34 or the secondary synchronous transmission member 44, so that stable power transmission is realized.
The tension adjusting structure 64 is used for adjusting the force of the tension wheel 63 abutting against the primary synchronous transmission member 34 or the secondary synchronous transmission member 44, and further adjusting the tension of the primary synchronous transmission member 34 or the secondary synchronous transmission member 44.
In this embodiment, the tension adjusting structure 64 includes an adjusting bolt 64a screwed to the swing base 61, a nut end of the adjusting bolt 64a is located on a side of the swing base 61 facing away from the primary synchronous transmission member 34 or the secondary synchronous transmission member 44, and the other end extends to a side of the swing base 61 facing the primary synchronous transmission member 34 or the secondary synchronous transmission member 44 and abuts against a top plate 64b fixedly connected to the servo transmission case 2.
Because the swing seat 61 is swing-hinged on the servo transmission case 2, and the end of the adjusting bolt 64a abuts against the top plate 64b, when the adjusting bolt 64a is screwed in or out, the swing seat 61 swings around the rotating shaft 62, so that the tension between the tension wheel 63 and the primary synchronous transmission member 34 or the secondary synchronous transmission member 44 can be adjusted.
It is apparent that various tension assemblies 6 can be applied to the present embodiment. In addition to the pivoting tensioning described above, an eccentric tensioning can also be selected.
As shown in fig. 7, the tension assembly 6 includes a tension wheel shaft 65, an eccentric shaft 66 is provided outside the tension wheel shaft 65, and a tension wheel 67 is connected to the outside of the eccentric shaft 66 through a bearing assembly 68. When the idler shaft 65 rotates circumferentially, the idler 67 abuts the primary or secondary synchronous drive 34, 44 at radial positions having different radii, so that the adjustment of the tensioning force is achieved.
The working principle of the feeding servo driving mechanism for the embroidery machine is as follows:
the feeding servo motor 1 is started, the primary speed reduction transmission component 3 connected with the power shaft 12 of the feeding servo motor 1 realizes primary speed reduction, and the secondary speed reduction transmission component 4 connected with the speed reduction transmission shaft 32 realizes secondary speed reduction; therefore, under the condition that the feeding speed after the secondary speed reduction is not changed, the rotating speed of the feeding servo motor 1 is greatly increased, so that the rated rotating speed can be reached or approached, the output torque of the feeding servo motor 1 is stable, and the feeding is accurate.
During operation of the primary 3 and secondary 4 reduction drive assemblies, each tensioning assembly 6 is capable of adjusting the degree of relaxation of the primary 34 and secondary 44 synchrodrives, respectively.
Example 2
The feeding servo driving mechanism for the embroidery machine of the embodiment has the same structure as that of the embodiment 1, but the diameter ratio of the first-stage small driving wheel 31 and the first-stage large driven wheel 33, the diameter ratio of the second-stage small driving wheel 41 and the second-stage large driven wheel 43 and other parameters are adjusted, so that the transmission ratio of the servo driving mechanism is 6: 1.
Example 3
The feeding servo driving mechanism for the embroidery machine of the embodiment has the same structure as that of the embodiment 1, but the diameter ratio of the first-stage small driving wheel 31 and the first-stage large driven wheel 33, the diameter ratio of the second-stage small driving wheel 41 and the second-stage large driven wheel 43 and other parameters are adjusted, so that the transmission ratio of the servo driving mechanism is 8: 1.
Example 4
The feeding servo driving mechanism for the embroidery machine of the embodiment has the same structure as that of the embodiment 1, but the diameter ratio of the first-stage small driving wheel 31 and the first-stage large driven wheel 33, the diameter ratio of the second-stage small driving wheel 41 and the second-stage large driven wheel 43 and other parameters are adjusted, so that the transmission ratio of the servo driving mechanism is 10: 1.
Example 5
The feeding servo driving mechanism for the embroidery machine of the embodiment has the same structure as that of the embodiment 1, but the diameter ratio of the first-stage small driving wheel 31 and the first-stage large driven wheel 33, the diameter ratio of the second-stage small driving wheel 41 and the second-stage large driven wheel 43 and other parameters are adjusted, so that the transmission ratio of the servo driving mechanism is 20: 1.
Claims (10)
1. A feeding servo driving mechanism for an embroidery machine comprises a feeding servo motor (1) and a rotary power output shaft (42), wherein a speed reducing unit is arranged between the feeding servo motor (1) and the rotary power output shaft (42), a power shaft (12) of the feeding servo motor (1) is connected with a power input end of the speed reducing unit, and the rotary power output shaft (42) is connected with a power output end of the speed reducing unit.
2. The feed servo drive mechanism for an embroidery machine as claimed in claim 1, wherein the gear ratio of said speed reducing unit is not less than 6: 1.
3. The feed servo driving mechanism for the embroidery machine as claimed in claim 1 or 2, wherein the reduction unit comprises a primary reduction gear assembly (3) connected to the power shaft (12) of the feed servo motor (1), and a secondary reduction gear assembly (4) connected to the reduction gear shaft (32) of the primary reduction gear assembly (3).
4. The feeding servo driving mechanism for the embroidery machine as claimed in claim 3, further comprising a servo transmission case (2) fixedly connected to the housing (11) of the feeding servo motor (1), wherein a primary transmission case chamber (21) and a secondary transmission case chamber (22) are formed in the servo transmission case (2) to be separated from each other;
the primary speed reduction transmission assembly (3) is arranged in the primary transmission box chamber (21), and the secondary speed reduction transmission assembly (4) is arranged in the secondary transmission box chamber (22).
5. The feeding servo driving mechanism for embroidery machine as claimed in claim 3, characterized in that said primary reduction transmission assembly (3) comprises a primary small driving wheel (31) driven by the power shaft (12) of the feeding servo motor (1), and a primary large driven wheel (33) having a reduction transmission shaft (32), and a primary synchronous transmission member (34) is provided between said primary small driving wheel (31) and said primary large driven wheel (33).
6. The feeding servo driving mechanism for embroidery machine as claimed in claim 5, wherein said primary capstan (31) is fixedly mounted on the power shaft (12) of said feeding servo motor (1); or the primary small driving wheel (31) is provided with a primary middle shaft which is fixedly connected with a power shaft (12) of the feeding servo motor (1) through a coupler;
at least one of the power shaft (12) of the feeding servo motor (1) and the primary middle shaft is rotatably connected with the servo transmission case (2) through a bearing (5), and the speed reduction transmission shaft (32) is rotatably connected with the servo transmission case (2) through the bearing (5).
7. The feeding servo driving mechanism for the embroidery machine as claimed in claim 5, wherein the primary small driving pulley (31) and the primary large driven pulley (33) are both belt pulleys, and the primary synchronous transmission member (34) is a synchronous transmission belt.
8. The feed servo drive mechanism for embroidery machines as claimed in claim 3, characterized in that said secondary reduction transmission assembly (4) comprises a secondary small driving wheel (41) driven by said reduction transmission shaft (32), and a secondary large driven wheel (43) having a rotary power output shaft (42), a secondary synchronous transmission member (44) being provided between said secondary small driving wheel (41) and said secondary large driven wheel (43).
9. The feeding servo driving mechanism for embroidery machine as claimed in claim 8, wherein said secondary small driving wheel (41) is fixedly mounted on said speed reducing transmission shaft (32); or the second-level small driving wheel (41) is provided with a second-level middle shaft which is fixedly connected with the speed reduction transmission shaft (32) through a coupler;
the speed reduction transmission shaft (32), the secondary middle shaft and the rotary power output shaft (42) are rotationally connected with the servo transmission box (2) through a bearing (5); or the speed reduction transmission shaft (32) and the rotary power output shaft (42) are rotationally connected with the servo transmission box (2) through a bearing (5).
10. An embroidery machine cloth conveying mechanism, which comprises a cloth roller and a driving unit for driving the cloth roller to rotate, and is characterized in that the driving unit is the feeding servo driving mechanism for the embroidery machine as claimed in any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023015978 | 2020-12-14 | ||
| CN2020230159785 | 2020-12-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216274710U true CN216274710U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122835652.5U Active CN216274710U (en) | 2020-12-14 | 2021-11-17 | Feeding servo driving mechanism for embroidery machine and cloth conveying mechanism for embroidery machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216274710U (en) |
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2021
- 2021-11-17 CN CN202122835652.5U patent/CN216274710U/en active Active
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