CN212759804U - Permanent magnet motor stator piece leaks empty colour and examines reason mascerating machine - Google Patents
Permanent magnet motor stator piece leaks empty colour and examines reason mascerating machine Download PDFInfo
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- CN212759804U CN212759804U CN202021671945.3U CN202021671945U CN212759804U CN 212759804 U CN212759804 U CN 212759804U CN 202021671945 U CN202021671945 U CN 202021671945U CN 212759804 U CN212759804 U CN 212759804U
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Abstract
The utility model discloses a permanent magnet motor stator piece missing color detecting and sorting machine, which comprises a top plate group, a secondary tuple, a panel group and a bottom plate group; the top plate group is located above the sheet sorting machine, the secondary tuples are located below the top plate group, the panel group is located below the secondary tuples, and the bottom plate group is located below the panel group and comprises a rack bottom plate, machine legs, a sheet bearing seat before sorting, a first profile, a limiting column, a sheet bearing seat after sorting, a second profile, a profile angle seat and a position detection switch. The utility model provides a reason mascerating machine can be synchronous with beat stamping production, and treats reason permanent magnet stator piece and tool synchronous operation, does not constitute any injury to permanent magnet stator piece.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, involve permanent-magnet machine, concretely relates to permanent-magnet machine stator piece leaks empty color and examines reason mascerating machine.
Background
The permanent magnet motor stator piece is mostly produced by punching one to two (finished product stator piece + laced rotor piece) or one to three (finished product stator piece + laced rotor piece + shaft hole piece). The stacking of the stator finished products obtained by blanking after being withdrawn by the material receiving mechanism is relatively disordered, and uniform stacking according to the mark grooves on the finished products is difficult to realize.
The disadvantages and shortcomings of the prior art include:
the existing sheet arranging technology comprises sheet arranging and manual sheet arranging of common three-phase stator sheets, and has the following defects and shortcomings respectively:
1. and (3) arranging the common three-phase stator plates. (1) The thickness of the permanent magnet sheet is 0.4-0.7 of that of a common three-phase motor sheet (the thickness is 0.5mm), the thickness of the permanent magnet sheet is 0.2-0.35 mm, the jaw size (the bottom of a coil inserting groove to the outer circle) of the permanent magnet stator sheet is small, the rigidity of the whole permanent magnet stator sheet is poor, and the sheet is difficult to stack neatly by adopting a sheet arranging mode of the common three-phase stator sheet; (2) repeated rotation easily causes the coating on the surface of the punching sheet to be scratched.
2. And (5) manually arranging the tablets. (1) The efficiency is low, and the lamination (reverse sheet) with burrs in different directions can occur; (2) cannot be completely synchronous with the deflection stamping production.
SUMMERY OF THE UTILITY MODEL
To the shortcoming and the deficiency that exist among the prior art, the utility model provides a permanent-magnet machine stator piece leaks empty color and examines reason mascerating machine, this reason mascerating machine can be synchronous with beat punching production, and treats reason permanent-magnet stator piece and tool synchronous operation, does not constitute any injury to permanent-magnet stator piece.
Therefore, the utility model adopts the following technical scheme:
a permanent magnet motor stator piece missing color detection and sorting machine comprises a top plate group, a secondary tuple, a panel group and a bottom plate group; the top plate group is positioned above the piece arranging machine and comprises a rack top plate, a linear guide rail, a rack, a first equal-height upright post, an overtravel buffer seat and a travel detection switch; the secondary tuple is positioned below the top plate group and comprises a mechanical arm, a first servo motor, a servo motor seat, a gear expansion sleeve, a cylinder, a guide bearing, a guide shaft, an electromagnetic chuck, an electromagnetic disk seat, a drag chain, a linear bearing, a stroke detection switch induction head and a counting detection switch; the panel group is positioned below the secondary tuples and comprises a rack panel, a piece arranging jig, a crossed roller bearing, an expansion sleeve, a second servo motor, an embedded color bar seat, a color leakage detection blank plate, an equal-height section bar, a second equal-height upright column, an angle seat adjusting rod seat, a color detection head angle seat adjusting rod, a color detection head angle seat and a color detection head; the bottom plate group is positioned below the panel group and comprises a frame bottom plate, machine legs, a piece bearing seat before treatment, a first section bar, a limiting column, a piece bearing seat after treatment, a second section bar, a section bar angle seat and a position detection switch.
Preferably, the rack bottom plate is installed on the machine foot, the first section bar is connected with the rack bottom plate through the section bar angle seat, the sheet bearing seat is connected with the first section bar through the section bar angle seat before the arrangement, the position detection switch is installed on the sheet bearing seat before the arrangement, the second section bar is connected with the rack bottom plate through the section bar angle seat, and the sheet bearing seat is connected with the second section bar through the section bar angle seat after the arrangement.
Preferably, the segment of the sheet bearing seat before the sheet processing is connected with a conveying flat belt of a blanking output permanent magnet finished stator sheet, and the position detection switch is used for position detection of the permanent magnet finished stator to be processed.
Preferably, one end of the equal-height section bar and one end of the second equal-height upright post are connected with the rack bottom plate, and the other end of the equal-height section bar and the second equal-height upright post are connected with the rack panel and are embedded on the rack panel; the second servo motor is arranged below the panel of the frame, and the sheet arranging jig is arranged on the inner ring of the crossed roller bearing; the expansion sleeve is internally connected with an output shaft of a second servo motor and externally connected with a piece arranging jig; the embedded color bar seat is arranged on the panel of the frame, and the color leakage detecting blank plate is embedded on the embedded color bar seat; the corner seat adjusting rod seat is installed on the panel of the machine frame, the color inspection head corner seat adjusting rod is installed on the corner seat adjusting rod seat, the color inspection head corner seat is installed on the color inspection head corner seat adjusting rod, and the color inspection head is installed on the color inspection head corner seat.
Preferably, the lower end of the first equal-height upright column is connected with the external thread on the upper part of the second equal-height upright column through the same thread, the rack top plate is installed on the first equal-height upright column, the linear guide rail, the rack and the overtravel buffer are installed on the back surface of the rack top plate, the overtravel buffer is installed on the overtravel buffer seat, and the stroke detection switch is installed on the rack top plate.
Preferably, linear bearing installs on linear guide, the arm is installed on linear bearing, the servo motor seat is installed on the arm, first servo motor installs on the servo motor seat, the gear is installed on first servo motor's output shaft, gear bloated tight cover hookup gear and first servo motor, cylinder and direction bearing are installed on the arm, the guiding axle runs through the direction bearing, the tailpiece of the piston rod of cylinder and the one end of guiding axle link to each other with the electromagnetic disk seat, electromagnetic chuck and count detection switch install on the electromagnetic disk seat, stroke detection switch inductive head is installed on the arm, tow chain one end is installed on rack panel, and the other end is installed at the arm.
Preferably, the positioning detection switch is a working signal source of the permanent magnet motor stator sheet missing color detection sheet processor.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) can be synchronous with the deflection stamping production.
(2) The permanent magnet stator pieces to be treated and the jig run synchronously, and no damage is caused to the permanent magnet stator pieces.
(3) The missing color detection accommodates the slight warping of the permanent magnet finished piece.
(4) The welding groove and the mark are checked in double-dot color, and the positive and negative sheets can be distinguished.
(5) The replacement piece arranging jig and the embedded color rod seat/color leakage detection blank plate can be applied to permanent magnet stator pieces with different sizes.
Drawings
Fig. 1 is a front view of the permanent magnet motor stator piece missing color detection and sorting machine provided by the present invention.
Fig. 2 is a left side view of the permanent magnet motor stator piece missing color detection and sorting machine provided by the utility model.
Fig. 3 is a top view of the permanent magnet motor stator piece missing color detection and sorting machine provided by the present invention.
Fig. 4 is a structural label diagram of a permanent magnet motor stator piece missing color detection and sorting machine provided by the utility model.
Fig. 5 is a structural label diagram two of the permanent magnet motor stator piece missing color detection and sorting machine provided by the present invention.
Fig. 6 is a schematic working diagram of a permanent magnet motor stator piece missing color detection and sorting machine according to a first embodiment of the present invention.
Fig. 7 is a schematic working diagram of a permanent magnet motor stator piece missing color detection and sorting machine according to an embodiment of the present invention.
Description of reference numerals: 1. a top plate group; 2. a quadratic tuple; 3. a panel group; 4. a bottom plate group; 1-1, a rack top plate; 1-2, linear guide rail; 1-3, a rack; 1-4, a first equal-height upright post; 1-5, an over-travel buffer; 1-6, an overtravel buffer seat; 1-7, a travel detection switch; 2-1, a mechanical arm; 2-2, a first servo motor; 2-3, a servo motor seat; 2-4, a gear; 2-5, gear expansion sleeve; 2-6, a cylinder; 2-7, a guide bearing; 2-8, a guide shaft; 2-9, electromagnetic chuck; 2-10, an electromagnetic disc seat; 2-11, a drag chain; 2-12, linear bearings; 2-13, a stroke detection switch induction head; 2-14, a counting detection switch; 3-1, a frame panel; 3-2, arranging a chip jig; 3-3, crossed roller bearings; 3-4, expanding and tightening the sleeve; 3-6, a second servo motor; 3-7, embedding a color bar seat; 3-8, detecting a blank plate by color leakage; 3-9, equal-height section bars; 3-10, second equal-height upright columns; 3-11, adjusting rod seats of angle seats; 3-12, adjusting a color inspection head corner seat rod; 3-13, color detecting head corner seat; 3-14, color detection head; 4-1, a frame bottom plate; 4-2, a machine leg; 4-3, arranging a front wafer bearing seat; 4-4, a first section bar; 4-5, a limiting column; 4-6, arranging a wafer bearing seat; 4-7, a second section bar; 4-8, profile angle seats; 4-9, a positioning detection switch.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are only used for explaining the present invention, but not for limiting the present invention.
As shown in fig. 1-5, the utility model discloses a permanent magnet motor stator piece missing color detecting and sorting machine, which comprises a top plate group 1, a secondary tuple 2, a panel group 3 and a bottom plate group 4; the top plate group 1 is positioned above the piece sorting machine and comprises a rack top plate 1-1, a linear guide rail 1-2, a rack 1-3, a first equal-height upright post 1-4, an overtravel buffer 1-5, an overtravel buffer seat 1-6 and a stroke detection switch 1-7; the secondary tuple 2 is positioned below the top plate group 1 and comprises a mechanical arm 2-1, a first servo motor 2-2, a servo motor base 2-3, a gear 2-4, a gear expansion sleeve 2-5, a cylinder 2-6, a guide bearing 2-7, a guide shaft 2-8, an electromagnetic chuck 2-9, an electromagnetic disk base 2-10, a drag chain 2-11, a linear bearing 2-12, a stroke detection switch induction head 2-13 and a counting detection switch 2-14; the panel group 3 is positioned below the secondary tuple 2 and comprises a frame panel 3-1, a piece arranging jig 3-2, a crossed roller bearing 3-3, an expansion sleeve 3-4, a second servo motor 3-6, an embedded color bar seat 3-7, a color leakage detection blank plate 3-8, an equal-height section bar 3-9, a second equal-height upright column 3-10, an angle seat adjusting rod seat 3-11, a color detection head angle seat adjusting rod 3-12, a color detection head angle seat 3-13 and a color detection head 3-14; the bottom plate group 4 is positioned below the panel group 3 and comprises a frame bottom plate 4-1, a machine foot 4-2, a piece bearing seat before treatment 4-3, a first section bar 4-4, a limiting column 4-5, a piece bearing seat after treatment 4-6, a second section bar 4-7, a section bar angle seat 4-8 and a position detection switch 4-9.
Specifically, as shown in fig. 4, the rack bottom plate 4-1 is mounted on the rack foot 4-2, the first profile 4-4 is connected with the rack bottom plate 4-1 through the profile angle seat 4-8, the pre-treatment sheet bearing seat 4-3 is connected with the first profile 4-4 through the profile angle seat 4-8, the position detection switch 4-9 is mounted on the pre-treatment sheet bearing seat 4-3, the second profile 4-7 is connected with the rack bottom plate 4-1 through the profile angle seat 4-8, and the post-treatment sheet bearing seat 4-6 is connected with the second profile 4-7 through the profile angle seat 4-8.
Specifically, the circle segment of the sheet bearing seat 4-3 before the sheet processing is connected with a conveying flat belt of a blanking output permanent magnet finished stator sheet, and the in-position detection switch 4-9 is used for in-position detection of a permanent magnet finished stator to be processed.
Specifically, one end of the equal-height section bar 3-9 and one end of the second equal-height upright post 3-10 are connected with the rack bottom plate 4-1, and the other end of the equal-height section bar is connected with the rack panel 3-1 and is embedded on the rack panel 3-1; the second servo motor 3-6 is arranged below the frame panel 3-1, and the sheet arranging jig 3-2 is arranged on an inner ring of the crossed roller bearing 3-3; the expansion sleeve 3-4 is internally connected with an output shaft of a second servo motor 3-6 and externally connected with a piece arranging jig 3-2; the embedded color bar seat 3-7 is arranged on the frame panel 3-1, and the color leakage detection blank plate 3-8 is embedded on the embedded color bar seat 3-7; the angle seat adjusting rod seat 3-11 is installed on the frame panel 3-1, the color detection head angle seat adjusting rod 3-12 is installed on the angle seat adjusting rod seat 3-11, the color detection head angle seat 3-13 is installed on the color detection head angle seat adjusting rod 3-12, and the color detection head 3-14 is installed on the color detection head angle seat 3-13.
Specifically, as shown in fig. 5, the lower end of the first equal-height upright 1-4 is connected with the external thread on the upper part of the second equal-height upright 3-10 by the same thread, the rack top plate 1-1 is installed on the first equal-height upright 1-4, the linear guide rail 1-2, the rack 1-3 and the overtravel buffer 1-5 are installed on the back surface of the rack top plate 1-1, the overtravel buffer 1-5 is installed on the overtravel buffer seat 1-6, and the stroke detection switch 1-7 is installed on the rack top plate 1-1.
Specifically, the linear bearing 2-12 is installed on a linear guide rail 1-2, the mechanical arm 2-1 is installed on the linear bearing 2-12, the servo motor base 2-3 is installed on the mechanical arm 2-1, the first servo motor 2-2 is installed on the servo motor base 2-3, the gear 2-4 is installed on an output shaft of the first servo motor 2-2, the gear expansion sleeve 2-5 is connected with the gear 2-4 and the first servo motor 2-2, the cylinder 2-6 and the guide bearing 2-7 are installed on the mechanical arm 2-1, the guide shaft 2-8 penetrates through the guide bearing 2-7, a piston rod end of the cylinder 2-6 and one end of the guide shaft 2-8 are connected with the electromagnetic disc base 2-10, the electromagnetic chuck 2-9 and the counting detection switch 2-14 are arranged on the electromagnetic chuck seat 2-10, the travel detection switch induction head 2-13 is arranged on the mechanical arm 2-1, one end of the drag chain 2-11 is arranged on the frame panel 3-1, and the other end of the drag chain is arranged on the mechanical arm 2-1.
Specifically, the positioning detection switch 4-9 is a working signal source of the permanent magnet motor stator sheet missing color detection sheet processor.
The permanent magnet motor stator piece missing color detection and sorting machine has the following working principle:
the position detection switch 4-9 of the stator piece of the permanent magnet finished product to be processed is a working signal source of the permanent magnet motor stator piece missing color detection chip processor.
The in-position detection switch 4-9 senses the in-position of the permanent magnet finished stator pieces to be processed, the secondary tuple 2 is grabbed and placed on the piece arranging jig 3-2, and the second servo motor 3-6 drives the piece arranging jig 3-2 and the permanent magnet stator pieces on the piece arranging jig 3-2 to rotate.
The rotary direction can be determined at a small angle by rotating in the forward direction or the reverse direction, which depends on the angle range (area value) of the mark groove on the pre-processing sheet bearing seat 4-3 relative to the color leakage detection blank plate 3-8 by the conveyer belt.
When the welding grooves and the marks on the permanent magnet stator sheet are detected by the color detection heads 3-14 at the same time, the second servo motor 3-6 and the sheet arranging jig 3-2 stop, and the sheet arranging work is finished.
When the position detection switch 4-9 senses that the permanent magnet finished stator piece to be processed is positioned next time and the secondary tuple 2 is repeatedly grabbed, the well-arranged permanent magnet finished stator is grabbed and placed on the post-processing piece bearing seat 4-6.
And repeating the cycle synchronously with the deflection punching.
Example one
As shown in fig. 6, the pre-processing sheet bearing seat 4-3 is a segment plate, and the segment part of the pre-processing sheet bearing seat 4-3 is a flat belt (provided by a punch deflection punching output system), so that the permanent magnet stator sheet to be processed can be conveyed to the pre-processing sheet bearing seat 4-3, and the upper output surface of the flat belt is kept level with the surface of the pre-processing sheet bearing seat 4-3, so as to facilitate grabbing of the secondary tuple 2.
Example two
As shown in fig. 7, only two positions of the color leakage detection blank plate 3-8 are respectively the same as the shape and size of the welding groove and the mark groove of the permanent magnet stator piece, and when the permanent magnet stator piece is driven to rotate by the second servo motor 3-6 along with the piece arranging jig 3-2, the color bar can be uncovered by the permanent magnet stator piece only once within the range of 360 degrees, such as the two positions indicated by the color bar in fig. 7. The color detecting heads 3-14 which are positioned above the two positions output detection results after detecting the color detecting heads simultaneously, and the second servo motors 3-6 are stopped by a PLC or a computer host.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle scope of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a permanent-magnet machine stator piece leaks empty look and examines reason mascerating machine which characterized in that: comprises a top plate group (1), a secondary tuple (2), a panel group (3) and a bottom plate group (4); the top plate group (1) is positioned above the piece arranging machine and comprises a rack top plate (1-1), a linear guide rail (1-2), a rack (1-3), a first equal-height upright post (1-4), an overtravel buffer (1-5), an overtravel buffer seat (1-6) and a stroke detection switch (1-7); the secondary tuple (2) is positioned below the top plate group (1) and comprises a mechanical arm (2-1), a first servo motor (2-2), a servo motor base (2-3), a gear (2-4), a gear expansion sleeve (2-5), a cylinder (2-6), a guide bearing (2-7), a guide shaft (2-8), an electromagnetic chuck (2-9), an electromagnetic disk base (2-10), a drag chain (2-11), a linear bearing (2-12), a stroke detection switch induction head (2-13) and a counting detection switch (2-14); the panel group (3) is positioned below the secondary tuple (2) and comprises a rack panel (3-1), a piece arranging jig (3-2), a crossed roller bearing (3-3), an expansion sleeve (3-4), a second servo motor (3-6), an embedded color bar seat (3-7), a color leakage detection blank plate (3-8), an equal-height section bar (3-9), a second equal-height upright column (3-10), an angle seat adjusting rod seat (3-11), a color detection head angle seat adjusting rod (3-12), a color detection head angle seat (3-13) and a color detection head (3-14); the bottom plate group (4) is positioned below the panel group (3) and comprises a rack bottom plate (4-1), machine legs (4-2), a piece bearing seat (4-3) before treatment, a first section bar (4-4), a limiting column (4-5), a piece bearing seat (4-6) after treatment, a second section bar (4-7), a section bar angle seat (4-8) and a position detection switch (4-9).
2. The machine for detecting and processing color leakage of permanent magnet motor stator piece according to claim 1, wherein: the rack bottom plate (4-1) is installed on a machine foot (4-2), the first section bar (4-4) is connected with the rack bottom plate (4-1) through a section bar angle seat (4-8), the piece bearing seat (4-3) before treatment is connected with the first section bar (4-4) through the section bar angle seat (4-8), the position detection switch (4-9) is installed on the piece bearing seat (4-3) before treatment, the second section bar (4-7) is connected with the rack bottom plate (4-1) through the section bar angle seat (4-8), and the piece bearing seat (4-6) after treatment is connected with the second section bar (4-7) through the section bar angle seat (4-8).
3. The machine for detecting and processing missing color of the permanent magnet motor stator piece according to claim 2, wherein: the circle segment of the sheet bearing seat (4-3) before the processing is connected with a conveying flat belt of a blanking output permanent magnet finished stator sheet, and the in-position detection switch (4-9) is used for in-position detection of a permanent magnet finished stator to be processed.
4. The machine for detecting and processing color leakage of permanent magnet motor stator piece according to claim 1, wherein: one end of the equal-height section bar (3-9) and one end of the second equal-height upright post (3-10) are connected with the rack bottom plate (4-1), and the other end of the equal-height section bar is connected with the rack panel (3-1) and is embedded on the rack panel (3-1); the second servo motor (3-6) is arranged below the rack panel (3-1), and the sheet arranging jig (3-2) is arranged on an inner ring of the crossed roller bearing (3-3); the expansion sleeve (3-4) is internally connected with an output shaft of a second servo motor (3-6) and externally connected with a piece arranging jig (3-2); the embedded color bar seat (3-7) is installed on the frame panel (3-1), and the color leakage detection blank plate (3-8) is embedded on the embedded color bar seat (3-7); the color detection head corner seat adjusting rod is characterized in that the corner seat adjusting rod seat (3-11) is installed on a frame panel (3-1), the color detection head corner seat adjusting rod (3-12) is installed on the corner seat adjusting rod seat (3-11), the color detection head corner seat (3-13) is installed on the color detection head corner seat adjusting rod (3-12), and the color detection head (3-14) is installed on the color detection head corner seat (3-13).
5. The machine for detecting and processing color leakage of permanent magnet motor stator piece according to claim 1, wherein: the lower end of the first equal-height upright post (1-4) is connected with the external thread on the upper part of the second equal-height upright post (3-10) through the same thread, the rack top plate (1-1) is installed on the first equal-height upright post (1-4), the linear guide rail (1-2), the rack (1-3) and the overtravel buffer (1-5) are installed on the back surface of the rack top plate (1-1), the overtravel buffer (1-5) is installed on the overtravel buffer seat (1-6), and the stroke detection switch (1-7) is installed on the rack top plate (1-1).
6. The machine for detecting and processing color leakage of permanent magnet motor stator piece according to claim 1, wherein: the linear bearing (2-12) is installed on a linear guide rail (1-2), the mechanical arm (2-1) is installed on the linear bearing (2-12), the servo motor base (2-3) is installed on the mechanical arm (2-1), the first servo motor (2-2) is installed on the servo motor base (2-3), the gear (2-4) is installed on an output shaft of the first servo motor (2-2), the gear expansion sleeve (2-5) is connected with the gear (2-4) and the first servo motor (2-2), the air cylinder (2-6) and the guide bearing (2-7) are installed on the mechanical arm (2-1), the guide shaft (2-8) penetrates through the guide bearing (2-7), and one end of a piston of the air cylinder (2-6) and one end of the guide shaft (2-8) and the electromagnetic disc The electromagnetic chuck (2-9) and the counting detection switch (2-14) are arranged on the electromagnetic chuck seat (2-10), the stroke detection switch induction head (2-13) is arranged on the mechanical arm (2-1), one end of the drag chain (2-11) is arranged on the frame panel (3-1), and the other end of the drag chain is arranged on the mechanical arm (2-1).
7. The machine for detecting and processing missing color of the permanent magnet motor stator sheet according to any one of claims 1 to 6, wherein: the in-position detection switch (4-9) is a working signal source of the permanent magnet motor stator sheet missing color detection sheet processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021671945.3U CN212759804U (en) | 2020-08-12 | 2020-08-12 | Permanent magnet motor stator piece leaks empty colour and examines reason mascerating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021671945.3U CN212759804U (en) | 2020-08-12 | 2020-08-12 | Permanent magnet motor stator piece leaks empty colour and examines reason mascerating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212759804U true CN212759804U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021671945.3U Active CN212759804U (en) | 2020-08-12 | 2020-08-12 | Permanent magnet motor stator piece leaks empty colour and examines reason mascerating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212759804U (en) |
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2020
- 2020-08-12 CN CN202021671945.3U patent/CN212759804U/en active Active
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