CN220296354U - Bolt feeding equipment with gaskets - Google Patents
Bolt feeding equipment with gaskets Download PDFInfo
- Publication number
- CN220296354U CN220296354U CN202321962765.4U CN202321962765U CN220296354U CN 220296354 U CN220296354 U CN 220296354U CN 202321962765 U CN202321962765 U CN 202321962765U CN 220296354 U CN220296354 U CN 220296354U
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- gasket
- bolt
- station
- feeding
- turntable
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- 238000007599 discharging Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 9
- 238000007664 blowing Methods 0.000 description 8
- 125000006850 spacer group Chemical group 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The utility model discloses a bolt feeding device with a gasket, which comprises: carousel device, bolt feedway, gasket feedway and cover gasket device. The turntable device comprises a rotating disk, and the rotating disk is provided with a plurality of belt grooves distributed on the outer edge along the circumferential direction. The turntable device is provided with bolt stations, gasket stations and discharging stations which are distributed along the circumferential direction. The bolt feeding device is provided with a bolt feeding opening arranged beside the bolt station. The gasket feeding device is provided with a gasket feeding hole arranged below the gasket station. The gasket sleeving device is arranged at the lower side of the gasket feed opening and is used for jacking up the gasket of the gasket feed opening. According to the bolt feeding equipment with the gasket, the turntable device drives the bolts to move at each station, so that feeding and sleeving automation of the bolts and the gaskets are realized, the bolt with the gasket is supplied, the automation degree is high, manual operation is avoided, and the efficiency is greatly improved.
Description
Technical Field
The utility model relates to the technical field of automatic processing production equipment, in particular to bolt feeding equipment with gaskets.
Background
Many assembly links are required to be fastened by using bolts, and during assembly, the bolts and the gaskets are required to be taken out of respective containers respectively, then the gaskets are sleeved on the bolts, and then the bolts are screwed into the threaded holes. Time is wasted in a large number or long time of assembly work, and repeated operations are complicated. Moreover, the bolt with the external thread formed by rolling is finished, the gasket is difficult to sleeve, and the thread of the bolt is easy to cause blockage to the inner ring of the gasket.
Therefore, the existing bolts are generally produced in a matched mode with the gaskets, the gaskets are sleeved into semi-finished products of the bolts, and then threads of the bolts are machined, so that the difficulty of sleeving the gaskets is greatly reduced. However, in the production process, the labor intensity of manually sleeving gaskets is high, time and labor are wasted, and the production efficiency is low. The device for sleeving the gasket on the bolt in the prior art has the defects of complex structure, poor stability and less and no gasket sleeving, and still needs to be optimized.
Disclosure of Invention
The present utility model aims to provide a bolt feeding device with gaskets, which solves one or more technical problems existing in the prior art, and at least provides a beneficial choice or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
a gasketed bolt feed apparatus comprising: the device comprises a turntable device, a bolt feeding device, a gasket feeding device and a gasket sleeving device;
the rotary table device comprises a rotary table, wherein the rotary table is provided with a plurality of material carrying grooves which are circumferentially distributed on the outer edge, and the rotary table device is provided with bolt stations, gasket stations and discharging stations which are circumferentially distributed;
the bolt feeding device is provided with a bolt feeding hole arranged beside the bolt station, the gasket feeding device is provided with a gasket feeding hole arranged below the gasket station, the gasket sleeving device is arranged on the lower side of the gasket feeding hole, and the gasket sleeving device is used for jacking up the gasket of the gasket feeding hole.
The bolt feeding equipment with the gasket provided by the utility model has at least the following beneficial effects: the bolt feeding device and the gasket feeding device can respectively feed the bolts and the gaskets to the bolt feeding opening and the gasket feeding opening, the bolts can fall into the belt grooves aligned with the bolt feeding opening, the gasket sleeving device can jack up the gaskets on the gasket feeding opening upwards, so that the gaskets are sleeved on the bolts aligned with the gasket feeding opening, and then the gaskets sleeved on the bolts are rotated together to move to the discharging station, so that feeding of the bolts with the gaskets is realized. According to the bolt feeding equipment with the gasket, the turntable device drives the bolts to move at each station, so that feeding and sleeving automation of the bolts and the gaskets are realized, the bolt with the gasket is supplied, the automation degree is high, manual operation is avoided, and the efficiency is greatly improved.
As the further improvement of the technical scheme, the number of the material carrying grooves is more than three, the material carrying grooves are uniformly distributed along the circumferential direction of the rotating disc, and the bolt stations, the gasket stations and the discharging stations are sequentially arranged at equal intervals.
As a further improvement of the above technical solution, the turntable device further includes a base and a turntable driving member, the turntable is rotatably connected with the base, and the turntable driving member is used for driving the turntable to rotate.
As a further improvement of the above technical solution, the turntable device further includes a retainer ring, the retainer ring has a material blocking portion disposed at the periphery of the rotating disc, and the material blocking portion extends from the bolt station to the discharge station along the circumferential direction of the rotating disc.
As a further improvement of the technical scheme, a gasket track is arranged on the lower side of the retainer ring and provided with a clearance gap through which bolts can movably pass, and the gasket track extends from the gasket station to the discharging station along the circumferential direction of the rotating disc.
As a further improvement of the above technical solution, the gasket sleeving device includes a gasket support and a gasket sleeving driving member, and the gasket sleeving driving member is used for driving the gasket support to move up and down.
As a further improvement of the above technical solution, the gasket holder has a clearance cavity extending up and down, the clearance cavity being aligned with the gasket station and provided with an opening facing the rotation direction of the rotating disc.
As a further improvement of the above technical solution, the upper end of the gasket holder has a positioning groove having an opening facing the rotation direction of the rotating disk and facing radially outward of the rotating disk.
As a further improvement of the technical scheme, a pressing device is further arranged above the gasket station, and the pressing device comprises a pressing block and a pressing driving unit used for driving the pressing block to move up and down.
As a further improvement of the technical scheme, a discharging device for sending out the bolts from the discharging station is arranged below the rotating disc.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a top view of one embodiment of a gasketed bolt feeding apparatus provided in accordance with the present utility model;
FIG. 2 is a schematic perspective view of an embodiment of a washer-bolt feeding apparatus according to the present utility model;
FIG. 3 is a side cross-sectional view of one embodiment of a gasketed bolt feeding apparatus provided in accordance with the present utility model;
FIG. 4 is an enlarged partial view of area A of FIG. 3;
FIG. 5 is a front cross-sectional view of one embodiment of a washer-bolt feeding apparatus provided by the present utility model;
fig. 6 is a partial enlarged view of the area B in fig. 5.
In the figure: 100. a turntable device; 110. a base; 120. a rotating disc; 121. a belt trough; 122. a discharge hole; 130. a turntable driving member; 140. a retainer ring; 150. a gasket track; 200. bolt feeding devices; 210. a bolt vibration disk; 220. the bolt is directly vibrated; 221. a bolt feed port; 300. gasket feeding device; 310. a gasket shake disc; 320. the gasket is vibrated directly; 321. a gasket feed port; 400. a gasket sleeving device; 410. a gasket support; 411. a space avoidance cavity; 412. a positioning groove; 420. a sleeve gasket driving member; 500. a compacting device; 510. a compaction block; 520. a compression driving unit; 600. a discharging device; 610. a pushing rod; 620. a discharge driving member; 630. a discharge rail; 631. a chute; 632. and a bracket.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 6, the washer-bolt feeding apparatus of the present utility model makes the following examples:
a gasketed bolt feed apparatus comprising: turntable assembly 100, bolt feeding assembly 200, spacer feeding assembly 300, and sleeve spacer assembly 400.
The turntable device 100 includes: a base 110, a rotating disk 120, and a turntable driving member 130.
The rotating disk 120 is rotatably connected with the base 110. The turntable driving member 130 is provided with a turntable driving end in driving connection with the turntable 120 and rotating the turntable 120 relative to the base 110.
The rotating disk 120 has a disk shape. The rotating disk 120 has a plurality of belt grooves 121 uniformly distributed on the outer periphery in the circumferential direction. The turntable device 100 has a bolt station, a gasket station, and a discharge station distributed in sequence in the circumferential direction. The included angle between the bolt station and the gasket station is consistent with the included angle between the gasket station and the discharging station, and is an integral multiple of the included angle between two adjacent belt grooves 121, so that the bolt station, the gasket station and the discharging station can be aligned with three belt grooves 121 at the same time.
The bolt feeding device 200 is provided with a bolt feeding hole 221 arranged beside the bolt station, and the bolt feeding device 200 is used for continuously feeding bolts to the bolt feeding hole 221.
The gasket feeding device 300 is provided with a gasket feeding hole 321 arranged below the gasket station, and the gasket feeding device 300 is used for continuously feeding gaskets to the gasket feeding hole 321.
The gasket sleeving device 400 is arranged at the lower side of the gasket feeding hole 321, and the gasket sleeving device 400 is used for jacking up the gasket of the gasket feeding hole 321.
During actual use, the bolt feeding device 200 and the gasket feeding device 300 can respectively supply bolts and gaskets to the bolt feeding hole 221 and the gasket feeding hole 321, the bolts can fall into the belt grooves 121 aligned with the bolt feeding hole 221, and the gasket sleeving device 400 can jack up the gaskets on the gasket feeding hole 321, so that the gaskets are sleeved on the bolts aligned with the gasket feeding hole 321, and then the gaskets sleeved on the bolts are communicated with each other to move to the discharging station in a rotating manner, so that feeding of the bolts with the gaskets is realized.
In this embodiment, the number of the belt grooves 121 is four, and the four belt grooves 121 are uniformly distributed on the outer circumference of the rotating disc 120. The bolt station is arranged at the rear end of the rotating disc 120, the gasket station is arranged at the right end of the rotating disc 120, and the discharging station is arranged at the front end of the rotating disc 120. The included angle between the adjacent belt grooves 121 is 90 degrees, and the bolt station, the gasket station and the discharging station are also sequentially arranged at the outer edge of the rotating disc 120 along the 90 degrees. The rotating disc 120 rotates for 90 degrees each time, so that the material carrying groove 121 can be aligned with the bolt station, the gasket station and the discharging station in sequence, and the feeding of bolts, gasket sleeving and feeding of bolts with gaskets are realized.
The turntable driving member 130 in this embodiment employs a DD motor in view of convenience in controlling the speed and accuracy of conveyance. In other embodiments, the dial drive member 130 may employ a cam divider to effect a specific angle of rotation of the rotatable plate 120 at a time. In other embodiments, the turntable driving member 130 may directly drive the turntable 120 using a rotary driving element such as a servo motor, a stepping motor, or a pneumatic motor.
In this embodiment, the bolt feeding device 200 includes a bolt vibration plate 210 and a bolt direct vibration 220. One end of the bolt direct vibration 220 is connected with the bolt vibration disk 210, and the bolt feed port 221 is arranged at the other end of the bolt direct vibration 220. The bolts are subjected to material arrangement and discharging in a vibration disc mode and continuously supplied to the bolt feed openings 221 one by one through direct vibration, so that continuous feeding of the screws is realized.
Likewise, the gasket feeding means 300 includes a gasket shake table 310 and a gasket direct vibration 320. One end of the gasket direct vibration 320 is connected with the gasket vibration disk 310, and the gasket feed port 321 is arranged at the other end of the gasket direct vibration 320. The gaskets are also arranged and discharged in a vibrating disc mode, and are continuously supplied to the gasket feed openings 321 one by one through direct vibration, so that continuous feeding of the gaskets is realized.
To prevent the bolts from being separated from the belt grooves 121 when the rotating disc 120 rotates, the turntable device 100 is provided with a retainer 140. The retainer 140 has a stopper. The blocking part is arranged on the periphery of the rotating disc 120 and extends from the bolt station to the discharging station along the circumferential direction of the rotating disc 120. After the bolts are clamped into the corresponding material carrying grooves 121 at the bolt stations, when the rotating disc 120 rotates to enable the bolts to move towards the material discharging stations, the material blocking parts can limit the bolts in the material carrying grooves 121, and the bolts are prevented from being separated.
Similarly, to avoid the falling of the gasket sleeved with the bolt at the gasket station, a section of the retainer ring 140 from the gasket station to the discharging station is provided with a gasket track 150. The gasket track 150 has clearance for the bolt to move through. The gasket track 150 extends from the gasket station to the outfeed station in the circumferential direction of the rotating disk 120. The bolt is from the gasket station rotates and carries to the in-process of ejection of compact station, and the bolt can be in keep away and pass in the position clearance, the gasket of cover on the bolt can be through gasket track 150 carries out the bearing, avoids dropping of gasket.
Specifically, the sleeve gasket device 400 includes: a shim tray 410 and a sleeve shim drive member 420.
The sleeve gasket driving member 420 is provided with a sleeve gasket driving end which is in driving connection with the gasket holder 410 and moves the gasket holder 410 up and down relative to the turntable device 100. When the bolts clamped in the belt grooves 121 move to align with the gasket stations, the gasket driving member 420 drives the gasket support 410 to move upwards, and the gaskets on the gasket feed openings 321 are lifted upwards to be sleeved on the bolts. In this embodiment, the pad driver 420 is an air cylinder, the cylinder of the pad driver 420 is fixedly mounted on the base 110, and the piston rod of the pad driver 420 is in transmission connection with the pad carrier 410. In other embodiments, the set of shim drive members 420 may also be linear drive members such as electric push rods, hydraulic push rods, or lead screw nut drive assemblies. The gasket holder 410 is slidably coupled to the base 110 in the up-down direction.
In order not to interfere with the rotational transport of the bolts, the shim stock 410 has a spacer cavity 411 extending up and down in up and down alignment with the shim station. The avoidance cavity 411 also has an opening facing the direction of rotation of the rotatable disk 120. When the gasket holder 410 lifts up a gasket, the bolts in the strap grooves 121 can be inserted into the avoidance cavities 411. After the gasket is sleeved into the bolt, the bolt can be moved out of the opening and separated from the avoidance cavity 411 when the rotating disk 120 drives the bolt to rotate.
To enable the gasket to fall into the upper end of the gasket holder 410 to be lifted up to achieve a telescoping bolt, the upper end of the gasket holder 410 has a detent 412. The detent groove 412 has an opening facing the rotational direction of the rotary disk 120 and facing radially outward of the rotary disk 120. The detent 412 can limit the gasket to align with the bolt of the gasket station above. A gasket can fall into the positioning groove 412 from the gasket feeding device 300 along the radial opening of the positioning groove 412; after the gasket is sleeved, when the rotating disc 120 drives the bolt and the gasket to move, the gasket can fall into the gasket track 150 along the opening of the positioning groove 412 facing the rotating direction.
In a further embodiment, to avoid the interaction between the spacer and the bolt when the spacer bracket 410 lifts the spacer, the bolt is moved upward relative to the rotating disk 120, and a pressing device 500 is provided above the spacer station. The compressing apparatus 500 includes: a compression block 510 and a compression driving unit 520. The pressing block 510 is disposed above the gasket station, and the pressing driving unit 520 is provided with a pressing driving end that is in transmission connection with the pressing block 510 and makes the pressing block 510 move up and down relative to the rotating disc 120. The compressing driving unit 520 may adopt a linear driving member such as an air cylinder, an electric push rod, a hydraulic push rod or a screw nut driving assembly. The pressing block 510 may be slidably coupled to the base 110 in the up-down direction.
In a further embodiment, a discharge device 600 for discharging the bolts out of the discharge station is provided below the rotary plate 120.
An outfeed rail 630 is provided alongside the carousel 100. The discharging rail 630 is provided with a chute 631 for the bolt to pass through, and two sides of the chute 631 are provided with symmetrically arranged brackets 632 which can support gaskets. The discharging rail 630 is fixedly connected with the base 110, so that the bracket 632 is flush with the gasket rail 150, and the sliding groove 631 is communicated with the clearance.
The discharge rail 630 has a feed end disposed beside the discharge station, and the feed end extends along the radial direction of the rotating disk 120. The belt groove 121 is provided with a discharge hole 122 extending radially along the rotary disk 120. The feeding end and the discharging device 600 are respectively disposed at two axial sides of the discharging hole 122.
In this embodiment, the discharging device 600 includes: a pusher 610 and an outfeed drive member 620. The pushing rod 610 extends along the axial direction of the discharging hole 122 and is coaxially arranged with the discharging hole 122. The discharge driving member 620 is provided with a discharge driving end which is in transmission connection with the pushing rod 610 and enables the pushing rod 610 to move back and forth along the self axis relative to the rotating disc 120.
In actual use, after the bolt sleeved with the gasket rotates to the discharging station, the discharging hole 122 of the material carrying groove 121 rotates to a position between the discharging device 600 and the discharging rail 630, and the feeding end and the pushing rod 610 are respectively arranged on the front side and the rear side of the discharging hole 122. The pushing rod 610 is driven to move forward by the discharging driving member 620, and the pushing rod 610 extends forward through the discharging hole 122, so that the bolt in the material carrying groove 121 is ejected forward and falls into the feeding end of the discharging rail 630.
In other embodiments, the discharging device 600 may also adopt another technical solution, and the discharging device 600 includes a blowing pipe. One end of the blowing pipe is communicated with the high-pressure air pump through the valve control element, and the other end of the blowing pipe is provided with a blowing port which is arranged forward. The blowing port is arranged at the rear of the feeding end of the discharging track 630. After the bolt sleeved with the gasket rotates to the discharging station, the discharging hole 122 of the material carrying groove 121 rotates to a position between the discharging device 600 and the discharging rail 630, and the feeding end and the material blowing opening are respectively arranged on the front side and the rear side of the discharging hole 122. The valve control element enables the blowing pipe to be filled with high-pressure gas, the gas is blown out from the blowing port, and the bolts in the material carrying groove 121 are blown forward through the discharging holes 122, so that the bolts fall into the feeding end of the discharging rail 630.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described, various changes, modifications, substitutions and alterations can be made herein by one having ordinary skill in the art without departing from the spirit and scope of the present utility model as defined by the following claims and the equivalents thereof.
Claims (10)
1. The utility model provides a take gasket bolt feed arrangement which characterized in that: comprising the following steps: the device comprises a turntable device, a bolt feeding device, a gasket feeding device and a gasket sleeving device;
the rotary table device comprises a rotary table, wherein the rotary table is provided with a plurality of material carrying grooves which are circumferentially distributed on the outer edge, and the rotary table device is provided with bolt stations, gasket stations and discharging stations which are circumferentially distributed;
the bolt feeding device is provided with a bolt feeding hole arranged beside the bolt station, the gasket feeding device is provided with a gasket feeding hole arranged below the gasket station, the gasket sleeving device is arranged on the lower side of the gasket feeding hole, and the gasket sleeving device is used for jacking up the gasket of the gasket feeding hole.
2. The gasketed bolt feeding apparatus according to claim 1, wherein: the number of the material carrying grooves is more than three, the material carrying grooves are uniformly distributed along the circumferential direction of the rotating disc, and the bolt stations, the gasket stations and the discharging stations are sequentially arranged at equal intervals.
3. The gasketed bolt feeding apparatus according to claim 1, wherein: the turntable device further comprises a base and a turntable driving member, wherein the turntable is rotationally connected with the base, and the turntable driving member is used for driving the turntable to rotate.
4. The gasketed bolt feeding apparatus according to claim 1, wherein: the turntable device further comprises a retainer ring, the retainer ring is provided with a material blocking part arranged on the periphery of the rotating disc, and the material blocking part extends from the bolt station to the discharging station along the circumferential direction of the rotating disc.
5. The gasketed bolt feeding apparatus according to claim 4, wherein: the lower side of retaining ring is equipped with the gasket track, the gasket track has the clearance that keeps away that can supply the bolt activity to pass, the gasket track follows the circumference of rolling disc is followed gasket station extends to the ejection of compact station.
6. The gasketed bolt feeding apparatus according to claim 5, wherein: the gasket sleeving device comprises a gasket supporting piece and a gasket sleeving driving component, wherein the gasket sleeving driving component is used for driving the gasket supporting piece to move up and down.
7. The gasketed bolt feeding apparatus according to claim 6, wherein: the gasket support member has a clearance cavity extending up and down, the clearance cavity being aligned with the gasket station and being provided with an opening oriented in the direction of rotation of the rotating disc.
8. The gasketed bolt feeding apparatus according to claim 6, wherein: the upper end of the gasket support member has a detent groove having an opening facing in the rotational direction of the rotating disc and radially outward of the rotating disc.
9. The gasketed bolt feeding apparatus according to claim 1, wherein: and a pressing device is further arranged above the gasket station and comprises a pressing block and a pressing driving unit used for driving the pressing block to move up and down.
10. The gasketed bolt feeding apparatus according to claim 1, wherein: and a discharging device for sending out the bolts from the discharging station is arranged below the rotating disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321962765.4U CN220296354U (en) | 2023-07-25 | 2023-07-25 | Bolt feeding equipment with gaskets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321962765.4U CN220296354U (en) | 2023-07-25 | 2023-07-25 | Bolt feeding equipment with gaskets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220296354U true CN220296354U (en) | 2024-01-05 |
Family
ID=89345867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321962765.4U Active CN220296354U (en) | 2023-07-25 | 2023-07-25 | Bolt feeding equipment with gaskets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220296354U (en) |
-
2023
- 2023-07-25 CN CN202321962765.4U patent/CN220296354U/en active Active
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