CN214988239U - Frame machine - Google Patents
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- CN214988239U CN214988239U CN202120784492.3U CN202120784492U CN214988239U CN 214988239 U CN214988239 U CN 214988239U CN 202120784492 U CN202120784492 U CN 202120784492U CN 214988239 U CN214988239 U CN 214988239U
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- frame strip
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- conveying
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Abstract
A frame machine relates to the technical field of automatic mechanical production and manufacturing. The device comprises a frame strip fixed-length feeding mechanism, a frame strip angle cutting mechanism, a frame strip edge cutting, punching and angle pressing connecting piece mechanism, a feeding and shunting conveying belt, a front frame strip conveying belt mechanism, a rear frame strip conveying belt mechanism, a splicing structure, a material taking and front placing mechanism, a material receiving mechanism, a workbench and a frame; a side frame strip fixed-length feeding mechanism is installed on the left side above the left workbench, a side frame strip angle cutting mechanism is arranged on the right side of the side frame strip fixed-length feeding mechanism, a side frame strip edge cutting, punching and angle pressing connecting piece mechanism is arranged on the right side of the side frame strip angle cutting mechanism, and a conveying track sequentially penetrates through the side frame strip fixed-length feeding mechanism, the side frame strip angle cutting mechanism and the side frame strip edge cutting, punching and angle pressing connecting piece mechanism and is connected with the conveying track on the right workbench through a feeding distribution conveying belt; the production line mechanism with full automation degree is adopted, all working mechanisms are combined into an integral production device, the automation degree is high, and the production without manual operation can be realized.
Description
Technical Field
The utility model relates to an automatic mechanical production makes technical field, concretely relates to frame machine.
Background
The frame machine is used for manufacturing metal material frames, the production of metal frames is completed through an automatic control system, conveying, punching, flattening and combined work, the automation degree of the existing frame machine is relatively low, more manual operations are needed, time and labor are wasted, the production cost is relatively high, the frame machine is not suitable for large-scale production lines, and the practicability is relatively low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a frame machine, it adopts full automatization degree's production assembly line mechanism, makes up into holistic production facility with each operating device, and degree of automation is higher, can realize not having manual operation production, improves production efficiency and production volume when reduction in production cost, and frame finished product quality is high, and production process labour saving and time saving is applicable to mass production, and the practicality is higher relatively.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the device comprises a frame strip fixed-length feeding mechanism 1, a frame strip 45-degree corner cutting mechanism 2, a frame strip edge cutting, punching and corner pressing connecting piece mechanism 3, a feeding split-flow conveying belt 4, a front frame strip conveying belt mechanism 5, a rear frame strip conveying belt mechanism 5, a splicing structure 6, a material taking and front edge placing mechanism 7, a material receiving mechanism 8, a workbench 9 and a frame 10; the worktable 9 is provided with a left worktable and a right worktable, the table surfaces of the two worktables 9 are both fixed with conveying tracks, the left side above the left worktable 9 is provided with a side frame strip fixed-length feeding mechanism 1, a side frame strip 45-degree corner cutting mechanism 2 is arranged at the right side of the side frame strip fixed-length feeding mechanism 1, a side frame strip trimming punching corner pressing connecting piece mechanism 3 is arranged at the right side of the side frame strip 45-degree corner cutting mechanism 2, the conveying tracks sequentially pass through the side frame strip fixed-length feeding mechanism 1 and the side frame strip 45-degree corner cutting mechanism 2, the frame strip side cut punching press angle connecting piece mechanism 3 is connected with the conveying track on the right side workstation 9 by pay-off reposition of redundant personnel conveyer belt 4, and right side workstation 9 top is provided with frame 10, and front and back frame strip conveyer belt mechanism 5 is installed in frame 10 upper portion left side, and mosaic structure 6 is installed in frame 10 lower part, gets the material and puts preceding mechanism 7 and install on frame 10 upper portion right side, and receiving agencies 8 sets up and is getting the material and put the 9 right sides of workstation of preceding mechanism 7 mounted position corresponding.
Further, the frame strip fixed-length feeding mechanism 1 comprises a rear material pressing cylinder 11, a front material pressing cylinder 12, a screw rod 13, a support 14 and frame conveying rollers 15, the support 14 is mounted on the upper portion of the workbench 9, the rear material pressing cylinder 11 and the front material pressing cylinder 12 are mounted on the support 14, the rear material pressing cylinder 11 is located on one side close to the external feeding mechanism, the front material pressing cylinder 12 is mounted on the corresponding other side, the bottom of the rear material pressing cylinder 11 is connected with the screw rod 13, the screw rod 13 is connected with a driving motor of the external feeding mechanism, and the frame conveying rollers 15 are mounted on the support 14 on the feeding side of the rear material pressing cylinder 11.
Further, 45 degrees corner cut mechanisms 2 of frame strip contain first motor 21, second motor 22, first cutting piece 23, second cutting piece 24, first motor 21 passes through the motor conveyer belt with first cutting piece 23 and is connected, second motor 22 passes through the motor conveyer belt with second cutting piece 24 and is connected.
Furthermore, the frame strip edge cutting, punching and corner pressing connecting piece mechanism 3 comprises a material taking cylinder 31, a material pressing cylinder 32, a first punching machine 33 and a second punching machine 34, wherein the material pressing cylinder 32 is installed on the right side of the material taking cylinder 31, the first punching machine 33 is located between the material taking cylinder 31 and the material pressing cylinder 32, and the second punching machine 34 is located on the right side of the material pressing cylinder 32.
Further, the feeding shunt conveyor belt 4 includes front and rear frame strip shunt belts 41, left and right frame strip shunt belts 42, and the front and rear frame strip shunt belts 41, the left and right frame strip shunt belts 42 are respectively connected to the conveying tracks on the left and right work tables 9.
Further, the front and rear frame strip conveyor mechanism 5 includes a front and rear frame strip conveying module 51, a front and rear frame strip taking clamp 52, and a front and rear frame strip conveyor belt 53, wherein the front and rear frame strip taking clamp 52 is installed at the lower portion of the front and rear frame strip conveying module 51, and the front and rear frame strip conveying module 51 is connected to the front and rear frame strip conveyor belt 53.
Further, the splicing structure 6 comprises a splicing station 61, a material taking and placing cylinder 62, a splicing conveyor belt 63 and a rear splicing cylinder 64, wherein the left side of the splicing station 61 is provided with the material taking and placing cylinder 62, the right side of the splicing station 61 is provided with the rear splicing cylinder 64, the splicing conveyor belt 63 below the material taking and placing cylinder 62 is connected with the left and right frame strip shunt belts 42, and the splicing conveyor belt 63 below the rear splicing cylinder 64 is connected with the front and rear frame strip shunt belts 41.
Further, the material taking and front edge placing mechanism 7 comprises a front edge placing conveying module 71 and a front edge placing taking clamp 72, the front edge placing taking clamp 72 is installed at the lower part of the front edge conveying module 71, and the front edge placing taking clamp 72 is located above the splicing structure 6.
Further, the material receiving mechanism 8 comprises a material rack 81, a guide rod 82 and a movable caster 83, the guide rod 82 is arranged on the upper portion of the material rack 81 and inclines upwards to the position of the material taking and placing front side mechanism 7, and the movable caster 83 is arranged at the bottom of the material rack 81.
The utility model discloses a theory of operation: a driving motor of an external feeding mechanism drives a screw rod to drive a rear material pressing cylinder to clamp a side frame strip to move forwards, the front material pressing cylinder presses the side frame strip after reaching a fixed length, the rear material pressing cylinder resets, when a 45-degree corner cutting mechanism of the side frame strip senses that materials enter, a double motor respectively drives a cutting blade to move forwards to cut the 45-degree corner of the side frame strip, a material taking cylinder takes the side frame strip from a conveying belt, the material pressing cylinder presses the side frame strip, 2 heads respectively cut edges and punch holes, corner connecting pieces are pressed, wherein each 2 strips are only pressed and connected with 1 strip, the conveying belt sends the side frame strip to the front side frame strip conveying belt and the rear side frame strip conveying belt through a shunting mechanism, a front side frame strip taking clamp and a rear side frame strip taking clamp are driven by the front side frame strip and the rear side frame strip taking clamp to take the front side frame strip and the rear side frame strip from the left and right conveying belt, the left side frame strip and the rear side frame strip are respectively taken from the conveying belt and put to a splicing position by respective material taking and putting mechanisms, the splicing is completed by the rear splicing air cylinder, after splicing, a material is taken from the splicing position by the material taking clamp arranged in front, the frame strip arranged in front is taken at the same time, the carrying module operates on the guide rod of the product receiving mechanism, the frame strip arranged in front is placed at the splicing position, the frame is sleeved on the guide rod by the material taking mechanism, and the frame automatically slides to the material rack.
After the technical scheme is adopted, the utility model discloses beneficial effect does: it adopts full automatization's production line mechanism, makes up into holistic production facility with each operating device, and degree of automation is higher, can realize not having manual operation production, improves production efficiency and production volume when reduction in production cost, and frame finished product high quality, production process labour saving and time saving is applicable to mass production, and the practicality is higher relatively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a front view corresponding to FIG. 1;
FIG. 3 is a top view corresponding to FIG. 1;
fig. 4 is a schematic structural view of the middle frame strip fixed length feeding mechanism 1 of the present invention;
fig. 5 is a schematic structural view of the middle frame strip 45-degree corner cutting mechanism 2 of the present invention;
fig. 6 is a schematic structural view of the trimming, punching and corner-pressing connecting member mechanism 3 of the middle frame strip of the present invention;
fig. 7 is a schematic structural diagram of the feeding and shunting conveyor belt 4 of the present invention;
fig. 8 is a schematic structural view of the front and rear frame strip conveyor belt mechanism 5 of the present invention;
fig. 9 is a schematic structural diagram of the splicing structure 6 in the present invention;
fig. 10 is a schematic structural view of the front side taking and placing mechanism 7 of the present invention;
fig. 11 is a schematic structural view of the material receiving mechanism 8 of the present invention.
Description of reference numerals: a frame strip fixed length feeding mechanism 1, a frame strip 45-degree corner cutting mechanism 2, a frame strip edge cutting, punching and corner pressing connecting piece mechanism 3, a feeding and shunting conveying belt 4, a front and rear frame strip conveying belt mechanism 5, a splicing structure 6, a material taking and front placing mechanism 7, a material receiving mechanism 8, a workbench 9, a frame 10, a rear material pressing cylinder 11, a front material pressing cylinder 12, a screw rod 13, a bracket 14, a frame conveying roller 15, a first motor 21, a second motor 22, a first cutting sheet 23, a second cutting sheet 24, a material taking cylinder 31, a material pressing cylinder 32, a first punching machine 33, a second punching machine 34, a front and rear frame strip shunting belt 41, a left and right frame strip shunting belt 42, a front and rear frame strip conveying module 51, a front and rear frame strip taking clamp 52, a front and rear frame strip conveying belt 53, a splicing station 61, a material taking and placing cylinder 62, a splicing conveying belt 63, a rear splicing cylinder 64, a front placing and front side conveying module 71, a front and rear frame strip taking and placing module 71, a front and placing module, A front-placing material taking clamp 72, a material rack 81, a guide rod 82 and a movable caster 83.
Detailed Description
Referring to fig. 1 to 11, the technical solution adopted by the present embodiment is: the device comprises a frame strip fixed-length feeding mechanism 1, a frame strip 45-degree corner cutting mechanism 2, a frame strip edge cutting, punching and corner pressing connecting piece mechanism 3, a feeding split-flow conveying belt 4, a front frame strip conveying belt mechanism 5, a rear frame strip conveying belt mechanism 5, a splicing structure 6, a material taking and front edge placing mechanism 7, a material receiving mechanism 8, a workbench 9 and a frame 10; the worktable 9 is provided with a left worktable and a right worktable, the table surfaces of the two worktables 9 are both fixed with conveying tracks, the left side above the left worktable 9 is provided with a side frame strip fixed-length feeding mechanism 1, a side frame strip 45-degree corner cutting mechanism 2 is arranged at the right side of the side frame strip fixed-length feeding mechanism 1, a side frame strip trimming punching corner pressing connecting piece mechanism 3 is arranged at the right side of the side frame strip 45-degree corner cutting mechanism 2, the conveying tracks sequentially pass through the side frame strip fixed-length feeding mechanism 1 and the side frame strip 45-degree corner cutting mechanism 2, the frame strip side cut punching press angle connecting piece mechanism 3 is connected with the conveying track on the right side workstation 9 by pay-off reposition of redundant personnel conveyer belt 4, and right side workstation 9 top is provided with frame 10, and front and back frame strip conveyer belt mechanism 5 is installed in frame 10 upper portion left side, and mosaic structure 6 is installed in frame 10 lower part, gets the material and puts preceding mechanism 7 and install on frame 10 upper portion right side, and receiving agencies 8 sets up and is getting the material and put the 9 right sides of workstation of preceding mechanism 7 mounted position corresponding.
Further, the frame strip fixed-length feeding mechanism 1 comprises a rear material pressing cylinder 11, a front material pressing cylinder 12, a screw rod 13, a support 14 and frame conveying rollers 15, the support 14 is mounted on the upper portion of the workbench 9, the rear material pressing cylinder 11 and the front material pressing cylinder 12 are mounted on the support 14, the rear material pressing cylinder 11 is located on one side close to the external feeding mechanism, the front material pressing cylinder 12 is mounted on the corresponding other side, the bottom of the rear material pressing cylinder 11 is connected with the screw rod 13, the screw rod 13 is connected with a driving motor of the external feeding mechanism, and the frame conveying rollers 15 are mounted on the support 14 on the feeding side of the rear material pressing cylinder 11.
Furthermore, the side frame strip 45-degree corner cutting mechanism 2 comprises a first motor 21, a second motor 22, a first cutting piece 23 and a second cutting piece 24, the first motor 21 is connected with the first cutting piece 23 through a motor conveyor belt, the second motor 22 is connected with the second cutting piece 24 through a motor conveyor belt, and the first cutting piece 23 and the second cutting piece 24 are installed at ninety degrees intervals.
Furthermore, the frame strip edge cutting, punching and corner pressing connecting piece mechanism 3 comprises a material taking cylinder 31, a material pressing cylinder 32, a first punching machine 33 and a second punching machine 34, wherein the material pressing cylinder 32 is installed on the right side of the material taking cylinder 31, the first punching machine 33 is located between the material taking cylinder 31 and the material pressing cylinder 32, and the second punching machine 34 is located on the right side of the material pressing cylinder 32.
Further, the feeding shunt conveyor belt 4 includes front and rear frame strip shunt belts 41, left and right frame strip shunt belts 42, and the front and rear frame strip shunt belts 41, the left and right frame strip shunt belts 42 are respectively connected to the conveying tracks on the left and right work tables 9.
Further, the front and rear frame strip conveyor mechanism 5 includes a front and rear frame strip conveying module 51, a front and rear frame strip taking clamp 52, and a front and rear frame strip conveyor belt 53, wherein the front and rear frame strip taking clamp 52 is installed at the lower portion of the front and rear frame strip conveying module 51, and the front and rear frame strip conveying module 51 is connected to the front and rear frame strip conveyor belt 53.
Further, the splicing structure 6 comprises a splicing station 61, a material taking and placing cylinder 62, a splicing conveyor belt 63 and a rear splicing cylinder 64, wherein the left side of the splicing station 61 is provided with the material taking and placing cylinder 62, the right side of the splicing station 61 is provided with the rear splicing cylinder 64, the splicing conveyor belt 63 below the material taking and placing cylinder 62 is connected with the left and right frame strip shunt belts 42, and the splicing conveyor belt 63 below the rear splicing cylinder 64 is connected with the front and rear frame strip shunt belts 41.
Further, the material taking and front edge placing mechanism 7 comprises a front edge placing conveying module 71 and a front edge placing taking clamp 72, the front edge placing taking clamp 72 is installed at the lower part of the front edge conveying module 71, and the front edge placing taking clamp 72 is located above the splicing structure 6.
Further, the material receiving mechanism 8 comprises a material rack 81, a guide rod 82 and a movable caster 83, the guide rod 82 is arranged on the upper portion of the material rack 81 and inclines upwards to the position of the front material taking and placing mechanism 7, the movable caster 83 is arranged at the bottom of the material rack 81, and the working position of the material rack 81 can be moved through the caster 83 so as to adapt to the material discharging work of the front material taking and placing mechanism 7.
A driving motor of an external feeding mechanism drives a screw rod to drive a rear material pressing cylinder to clamp a side frame strip to move forwards, the front material pressing cylinder presses the side frame strip after reaching a fixed length, the rear material pressing cylinder resets, when a 45-degree corner cutting mechanism of the side frame strip senses that materials enter, a double motor respectively drives a cutting blade to move forwards to cut the 45-degree corner of the side frame strip, a material taking cylinder takes the side frame strip from a conveying belt, the material pressing cylinder presses the side frame strip, 2 heads respectively cut edges and punch holes, corner connecting pieces are pressed, wherein each 2 strips are only pressed and connected with 1 strip, the conveying belt sends the side frame strip to the front side frame strip conveying belt and the rear side frame strip conveying belt through a shunting mechanism, a front side frame strip taking clamp and a rear side frame strip taking clamp are driven by the front side frame strip and the rear side frame strip taking clamp to take the front side frame strip and the rear side frame strip from the left and right conveying belt, the left side frame strip and the rear side frame strip are respectively taken from the conveying belt and put to a splicing position by respective material taking and putting mechanisms, the splicing is completed by the rear splicing air cylinder, after splicing, a material is taken from the splicing position by the material taking clamp arranged in front, the frame strip arranged in front is taken at the same time, the carrying module operates on the guide rod of the product receiving mechanism, the frame strip arranged in front is placed at the splicing position, the frame is sleeved on the guide rod by the material taking mechanism, and the frame automatically slides to the material rack.
After the technical scheme is adopted, the utility model discloses beneficial effect does: it adopts full automatization's production line mechanism, makes up into holistic production facility with each operating device, and degree of automation is higher, can realize not having manual operation production, improves production efficiency and production volume when reduction in production cost, and frame finished product high quality, production process labour saving and time saving is applicable to mass production, and the practicality is higher relatively.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A frame machine which characterized in that: the device comprises a frame strip fixed-length feeding mechanism (1), a frame strip 45-degree corner cutting mechanism (2), a frame strip edge cutting, punching and corner pressing connecting piece mechanism (3), a feeding and shunting conveying belt (4), a front and rear frame strip conveying belt mechanism (5), a splicing structure (6), a material taking and front placing mechanism (7), a material receiving mechanism (8), a workbench (9) and a frame (10); the worktable (9) is provided with a left worktable and a right worktable, conveying tracks are fixed on the table surfaces of the two worktable (9), a side frame strip fixed-length feeding mechanism (1) is installed on the left side above the left worktable (9), a side frame strip 45-degree corner cutting mechanism (2) is arranged on the right side of the side frame strip fixed-length feeding mechanism (1), a side frame strip trimming punching corner connecting piece mechanism (3) is arranged on the right side of the side frame strip 45-degree corner cutting mechanism (2), the conveying tracks sequentially penetrate through the side frame strip fixed-length feeding mechanism (1), the side frame strip 45-degree corner cutting mechanism (2) and the side frame strip trimming punching corner connecting piece mechanism (3) and are connected with the conveying tracks on the right worktable (9) through a feeding shunt conveying belt (4), a frame (10) is arranged above the right worktable (9), a front side frame strip conveying belt mechanism and a rear side frame strip conveying belt mechanism (5) are installed on the left side of the upper part of the frame (10), a splicing structure (6) is installed on the lower part of the frame (10), the material taking and front placing mechanism (7) is installed on the right side of the upper portion of the frame (10), and the material receiving mechanism (8) is arranged on the right side of the workbench (9) corresponding to the installation position of the material taking and front placing mechanism (7).
2. The frame machine of claim 1, wherein: frame strip fixed length feeding mechanism (1) contain back material cylinder (11), preceding material cylinder (12), lead screw (13), support (14), frame conveying roller (15), install on workstation (9) upper portion support (14), and install back material cylinder (11) on support (14), preceding material cylinder (12), back material cylinder (11) are located and are close to outside feeding mechanism one side, material cylinder (12) are pressed before the opposite side installation of correspondence, back material cylinder (11) bottom is connected with lead screw (13), and lead screw (13) are connected with outside feeding mechanism's driving motor, install frame conveying roller (15) on feeding one side support (14) of back material cylinder (11).
3. The frame machine of claim 1, wherein: 45 degrees corner cut mechanisms of frame strip (2) contain first motor (21), second motor (22), first cutting piece (23), second cutting piece (24), first motor (21) pass through the motor conveyer belt with first cutting piece (23) and are connected, second motor (22) pass through the motor conveyer belt with second cutting piece (24) and are connected.
4. The frame machine of claim 1, wherein: the side frame strip side cut punching press angle of push up connecting piece mechanism (3) contain get material cylinder (31), press material cylinder (32), first piercing press (33), second piercing press (34), get material cylinder (31) right side and install and press material cylinder (32), first piercing press (33) are located and are got between material cylinder (31), press material cylinder (32) the station, second piercing press (34) are located and press material cylinder (32) right side.
5. The frame machine of claim 1, wherein: the feeding and shunting conveying belt (4) comprises a front and a rear frame strip shunting belt (41) and a left and a right frame strip shunting belt (42), and the front and the rear frame strip shunting belts (41) and the left and the right frame strip shunting belts (42) are respectively connected with conveying tracks on a left workbench and a right workbench (9).
6. The frame machine of claim 1, wherein: front and back frame strip conveyer belt mechanism (5) contain front and back frame strip and carry module (51), front and back frame strip drawing clamp (52), front and back frame strip conveyer belt (53), front and back frame strip drawing clamp (52) are installed and are carried module (51) lower part in front and back frame strip, front and back frame strip is carried module (51) and is connected with front and back frame strip conveyer belt (53).
7. The frame machine of claim 1, wherein: splicing structure (6) contain concatenation station (61), get and expect cylinder (62), concatenation conveyer belt (63), back concatenation cylinder (64), the left side of concatenation station (61) is provided with one and gets blowing cylinder (62), concatenation station (61) right side is provided with one back concatenation cylinder (64), two concatenation conveyer belts (63) of getting blowing cylinder (62) below are connected with left and right frame strip reposition of redundant personnel area (42), concatenation conveyer belt (63) of back concatenation cylinder (64) below are connected with front and back frame strip reposition of redundant personnel area (41).
8. The frame machine of claim 1, wherein: the material taking and front placing mechanism (7) comprises a front placing edge conveying module (71) and a front placing edge taking clamp (72), the front placing edge taking clamp (72) is installed at the lower part of the front edge conveying module (71), and the front placing edge taking clamp (72) is located above the splicing structure (6).
9. The frame machine of claim 1, wherein: the material receiving mechanism (8) comprises a material rack (81), a flow guide rod (82) and a movable caster (83), the flow guide rod (82) which inclines upwards to the position of the material taking and front placing mechanism (7) is arranged on the upper portion of the material rack (81), and the movable caster (83) is arranged at the bottom of the material rack (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784492.3U CN214988239U (en) | 2021-04-16 | 2021-04-16 | Frame machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784492.3U CN214988239U (en) | 2021-04-16 | 2021-04-16 | Frame machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214988239U true CN214988239U (en) | 2021-12-03 |
Family
ID=79137420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120784492.3U Active CN214988239U (en) | 2021-04-16 | 2021-04-16 | Frame machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214988239U (en) |
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2021
- 2021-04-16 CN CN202120784492.3U patent/CN214988239U/en active Active
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