CN211277652U - Turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center - Google Patents
Turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center Download PDFInfo
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- CN211277652U CN211277652U CN201921664444.XU CN201921664444U CN211277652U CN 211277652 U CN211277652 U CN 211277652U CN 201921664444 U CN201921664444 U CN 201921664444U CN 211277652 U CN211277652 U CN 211277652U
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Abstract
The utility model discloses a turning, milling, grinding, boring, brill multi-functional walking beam combination machining center, including base, portal frame, longmen workstation, first knife rest structure, second knife rest structure, rotary worktable and gripper seat, the both ends stand of portal frame sets up on the base, longmen workstation sets up between the base of both sides, first knife rest structure sets up on the crossbeam of portal frame, second knife rest structure sets up on the crossbeam of portal frame, rotary worktable sets up on longmen workstation, the gripper seat sets up on rotary worktable. The utility model discloses a multi-functional walking beam combination machining center through setting up multiple cutters such as lathe tool, cutter head, bistrique, boring cutter, drill bit at first knife rest structure and second knife rest structure, has satisfied the various processing demands of work piece simultaneously to the processing angle of first knife rest structure is adjustable, and portal frame and second knife rest structure all can remove, can satisfy the processing demand of the different positions of work piece.
Description
Technical Field
The utility model relates to a lathe technical field, in particular to turning, milling, grinding, boring multi-functional walking beam combination machining center.
Background
Machine tools are indispensable processing equipment in the mechanical production industry, and can be divided into various types according to different functions and purposes, such as lathes, milling machines, grinding machines, boring machines, drilling machines and the like, and one workpiece may need to be processed by various processes such as lathing, milling, grinding, boring, drilling and the like at the same time. The traditional processing mode can only be realized by replacing a processing machine tool, a workpiece is transferred from one machine tool to another machine tool, time and labor are wasted, the production efficiency is low, the processing precision of the workpiece is difficult to guarantee by repeated clamping, and the processing precision of a product is reduced.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model discloses a car, mill, grind, bore multi-functional walking beam combination machining center, including base, portal frame, longmen workstation, first knife rest structure, second knife rest structure, rotary worktable and gripper seat, the both ends stand slidable ground of portal frame sets up on the base, longmen workstation sets up between the base of both sides, first knife rest structure rotationally sets up on the crossbeam of portal frame, the movably setting of second knife rest structure is in on the crossbeam of portal frame, rotary worktable sets up on the longmen workstation, the gripper seat sets up on the rotary worktable.
As the further improvement of above-mentioned technical scheme, first knife rest structure includes first ram, first traveller, gyration slip table, gyration sword platform and a driving motor, first traveller sets up on the crossbeam of portal frame, the gyration slip table rotationally sets up on the first traveller, first ram slidable ground sets up on the gyration slip table, the gyration sword platform rotationally sets up first ram bottom, a driving motor sets up first ram top and through lead screw drive subassembly with gyration slip table transmission is connected.
As a further improvement of the above technical scheme, the revolving sliding table is connected with the first sliding column in a rotating manner through a worm transmission assembly, the worm transmission assembly comprises a worm and a worm driving motor, the worm is connected with the arc-shaped rack at the top end of the first sliding column in a transmission manner, and two ends of the worm are connected with the revolving sliding table in a rotating manner.
As a further improvement of the above technical solution, the second tool rest structure includes a second ram, a second driving motor and a tool driving motor, the second ram is disposed on a cross beam of the gantry, the second ram is slidably disposed on the second ram and the second ram is in transmission connection with the second ram through a screw transmission assembly, and the tool driving motor is disposed at a bottom end of the second ram.
As a further improvement of the above technical solution, the rotary worktable is in transmission connection with a rotary driving assembly arranged inside the gantry worktable, the rotary driving assembly includes a rotary driving motor, a gear shifting mechanism and a transmission mechanism, the rotary driving motor is connected with the transmission mechanism through the gear shifting mechanism, and the transmission mechanism is in transmission connection with the rotary worktable.
As a further improvement of the technical scheme, a plurality of jaw seats are arranged on the rotary worktable and comprise mounting seats, movable lead screws and jaws, the mounting seats are adjustably arranged on the rotary worktable, and the jaws are arranged on the mounting seats and are in transmission connection with the mounting seats through the movable lead screws.
As a further improvement of the above technical scheme, the rotary tool post comprises a rotary seat, a rotary shaft sleeve, a pull rod and a handle, the rotary shaft sleeve penetrates through the axis of the rotary seat and is rotatably connected with the first ram, the pull rod penetrates through the rotary shaft sleeve, one end of the pull rod is connected with the rotary shaft sleeve, the other end of the pull rod is rotatably connected with the handle, and a plurality of tool mounting holes are formed in the periphery of the rotary seat.
As a further improvement of the above technical solution, a first gear ring is arranged at the bottom of the rotary seat, a second gear ring meshed with the first gear ring is arranged on the first ram, and the rotary seat is rotatably arranged on the first ram through the first gear ring and the second gear ring.
As a further improvement of the technical scheme, the portal frame is also provided with a tool magazine.
As a further improvement of the technical scheme, the base and the beam part of the portal frame are respectively provided with a protective cover.
The utility model has the advantages that:
the utility model discloses a turning, mill, grind, boring, bore multi-functional walking beam combination machining center, through set up multiple cutters such as lathe tool, cutter head, bistrique, boring cutter, drill bit at first knife rest structure and second knife rest structure, satisfied the various processing demands of work piece simultaneously to the processing angle of first knife rest structure is adjustable, and portal frame and second knife rest structure all can remove, can satisfy the processing demand of the different positions of work piece.
The utility model has multiple purposes, can realize various processing techniques by one-time clamping, avoids the processing precision error caused by repeatedly clamping the workpiece, and simultaneously improves the processing efficiency; the machining tool can be suitable for machining workpieces with various regular and irregular shapes, such as various workpieces of shafts, cylinders, flanges, bent pipes and the like, can also be used for machining workpieces of blanks or semi-finishing type, has wide application range and strong universality, and is a high-tech comprehensive machining tool.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a first tool rest structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the rotary knife table of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a schematic structural view of the worm drive assembly of the present invention;
FIG. 6 is a schematic structural view of a second tool holder structure according to the present invention;
fig. 7 is a schematic structural view of the swing drive assembly of the present invention;
fig. 8 is a schematic structural view of the rotary table of the present invention;
fig. 9 is a schematic structural view of the jaw seat of the present invention.
Reference numerals:
10-a base;
20-a portal frame;
30-a gantry workbench; 31-T type groove;
40-a first toolholder structure; 41-a first ram; 42-a first traveler; 421-arc rack; 43-a revolving slide table; 431-a rotation axis; 44-a rotary tool post; 441-a rotary seat; 442-turning shaft sleeve; 443-a pull rod; 444-a handle; 445-a limiting block; 446-tool mounting hole; 447-a first ring gear; 448 — a second ring gear; 449-limit seat; 449 a-stop lever; 45-a first drive motor; 46-a worm drive assembly; 461-worm; 462-a worm drive motor; 47-a first slide rail;
50-a second tool holder configuration; 51-a second ram; 52-second spool; 53-a second drive motor; 54-a tool drive motor; 55-a second slide rail;
60-a rotary table; 61-adjusting the slide way;
70-a jaw seat; 71-a mounting seat; 72-moving the lead screw; 73-claws; 74-a positioning bolt; 75-a locking bolt; 76-a locking block; 77-adjusting the nut;
80-tool magazine;
90-a protective cover;
100-a rotary drive motor;
110-a gear shift mechanism;
120-a transmission mechanism; 121-a first bevel gear; 122-a second bevel gear; 123-a first bevel gear; 124-second bevel gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise explicitly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; either directly or through an intervening medium, or through internal communication between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center of the embodiment includes a base 10, a gantry 20, a gantry table 30, a first tool rest structure 40, a second tool rest structure 50, a rotary table 60, a jaw seat 70 and a tool magazine 80.
The two end columns of the gantry 20 are slidably disposed on the base 10, so that the gantry 20 can move along the gantry table 30, and the sliding connection manner of the gantry 20 and the base 10 adopts the conventional technical means in the art.
The gantry workbench 30 is arranged between the bases 10 at the two sides, the rotary workbench 60 is arranged on the gantry workbench 30, and the clamping jaw seat 70 is arranged on the rotary workbench 60; the first carriage structure 40 is rotatably disposed on a beam of the gantry 20, the second carriage structure 50 is movably disposed on a beam of the gantry 20, and the second carriage structure 50 is slidably connected to the beam of the gantry 20 by conventional means in the art.
The portal frame 20 can be provided with a first tool rest structure 40 and a second tool rest structure 50 on the front and rear sides of the beam, in this embodiment, the first tool rest structure 40 is provided on one side of the beam, and the second tool rest structure 50 is provided on each side of the beam.
The beam parts of the base 10 and the portal frame 20 are respectively provided with a protective cover 90, so that the guide rail structures on the base 10 and the portal frame 20 are protected, dust and processing scrap iron are prevented from entering the guide rail, the damage to the guide rail is reduced, and the service life of the guide rail is prolonged; and the whole machine can be fully-enclosed or semi-enclosed according to the installation requirements of customers. Wherein, the protection casing 90 is preferably the flexible protection casing of steel sheet formula, can freely stretch out and draw back according to the stroke of rail structure.
A plurality of T-shaped grooves 31 are also arranged at intervals along the longitudinal direction of the gantry workbench 30 and are used for supporting and locking workpieces, so that the stability of the machine tool in the machining process is ensured.
The tool magazine 80 is provided on a column of the gantry 20 adjacent one side of the first carriage structure 40 to provide tools for the second carriage structure 50. The tool magazine 80 may be a conventional tool magazine such as a disc magazine or a chain magazine manufactured by anshi precision machines ltd.
As shown in fig. 2, the first tool rest structure 40 includes a first ram 41, a first ram 42, a rotary slide table 43, a rotary tool table 44, and a first drive motor 45.
The first sliding column 42 is arranged on a cross beam of the portal frame 20, the rotary sliding table 43 is rotatably arranged on the first sliding column 42 through a worm transmission assembly 46, and two sides of the first ram 41 are slidably arranged on the rotary sliding table 43 through first sliding rails 47; the rotary tool post 44 is rotatably disposed at the bottom end of the first ram 41, and the first driving motor 45 is disposed at the top end of the first ram 41 and is in transmission connection with the rotary sliding table 43 through a screw transmission assembly.
The screw transmission assembly is a conventional technical means in the field, and mainly comprises a screw and a nut in transmission fit with the screw, wherein the screw is connected with a first driving motor 45, and the nut is connected with a first ram 41; when the first driving motor 45 drives the screw rod to rotate, the screw nut is driven to move up and down along the screw rod, and then the first ram 41 is driven to move up and down along the rotary sliding table 43, so that the distance between the cutter and the workpiece is adjusted.
As shown in fig. 3-4, the rotary cutter table 44 includes a rotary base 441, a rotary sleeve 442, a pull rod 443, and a handle 444; the rotary shaft sleeve 442 penetrates through the axis of the rotary seat 441 to rotatably connect the rotary seat 441 with the outer wall of the first ram 41; the pull rod 443 penetrates through the rotating shaft sleeve 442, one end of the pull rod is connected with the bottom of the rotating shaft sleeve 442 through a limiting block 445, and the other end of the pull rod is eccentrically and rotatably connected with the handle 444; the periphery of the rotary seat 441 is provided with a plurality of tool mounting holes 446, tools such as turning tools, boring tools, milling cutters, grinding heads, drill bits and the like can be simultaneously mounted according to processing requirements, and when the rotary seat is used, the corresponding tools only need to be adjusted to processing stations.
The bottom of the rotary seat 441 is provided with a first toothed ring 447, the outer wall of the first ram 41 is provided with a second toothed ring 448 meshed with the first toothed ring 447, and the rotary seat 441 is rotatably arranged on the first ram 41 through the first toothed ring 447 and the second toothed ring 448.
A limiting seat 449 is further arranged between the rotary seat 441 and the handle 444, a limiting rod 449a extending towards one side of the handle 444 is arranged on the limiting seat 449, and the limiting seat 449 and the limiting rod 449a play a role in adjusting and locking the rotary seat 441.
Fig. 3 shows a locked state of the rotary tool post 44, when the tool needs to be replaced by rotating the rotary base 441, the handle 444 is first lifted outward, the root of the handle 444 is disengaged from the stopper 449a, the pull rod 443 becomes loose, the first ring gear 447 is disengaged from the second ring gear 448, and at this time, the rotary base 441 can be rotated to replace the tool.
After the tool is replaced, the handle 444 is pressed back to the original position, due to the action of the limiting rod 449a, the root of the handle 444 and the top end of the limiting rod 449a form a rotating fulcrum, and under the lever action, the handle 444 lifts the pull rod 443 upwards to enable the limiting block 445 to be clamped at the bottom of the rotating shaft sleeve 442, so that the rotating base 441 and the first ram 41 are locked with each other through the first gear ring 447 and the second gear ring 448.
As shown in fig. 5, the top end of the first sliding column 42 is provided with a circular arc-shaped rack 421, and the worm drive assembly 46 includes a worm 461 and a worm drive motor 462 in transmission connection with the worm 461; the worm 461 is in transmission connection with the arc-shaped rack 421, and both ends of the worm 461 are connected with the rotary sliding table 43.
The worm driving motor 462 drives the worm 461 to rotate, and the worm 461 and the circular arc-shaped rack 421 are matched to drive the rotary sliding table 43 to rotate around the rotary axis 431, so as to drive the first ram 41 and the rotary tool table 44 to perform angle adjustment, thereby realizing the machining of the workpiece taper.
As shown in fig. 6, the second tool head structure 50 includes a second ram 51, a second ram 52, a second drive motor 53, and a tool drive motor 54; the second ram 52 is arranged on a cross beam of the portal frame 20, two sides of the second ram 51 are slidably connected with the second ram 52 through a second slide rail 55, and the second driving motor 53 is in transmission connection with the second ram 51 through a lead screw transmission assembly; the cutter drive motor 54 is provided on the second ram 51.
The structure and operation of the screw drive assembly in the second tool holder structure 50 are the same as those of the screw drive assembly of the first tool holder structure 40, and therefore, the detailed description thereof is omitted.
The second driving motor 53 drives the second ram 51 to move up and down along the second ram 52 through the screw transmission assembly, so that the adjustment of the distance between the tool and the workpiece is realized.
The spindle of the tool driving motor 54 may be provided with various tools such as a milling tool, a boring tool, and a drill through a tool apron, so as to facilitate the milling, boring, and drilling processes of a workpiece.
As shown in fig. 7, the rotary table 60 is in transmission connection with a rotary driving assembly disposed inside the gantry table 30, the rotary driving assembly includes a rotary driving motor 100, a gear shifting mechanism 110 and a transmission mechanism 120, the rotary driving motor 100 is connected with the transmission mechanism 120 through the gear shifting mechanism 110, and the transmission mechanism 120 is in transmission connection with the rotary table 60. The rotary driving motor 100 is a servo motor with an indexing function, such as HF-KN73 series servo motors of mitsubishi corporation, and can meet the requirement of circumferential machining indexing of different workpieces.
The transmission mechanism 120 comprises a first bevel gear 121 connected with the gear shifting mechanism 110, a second bevel gear 122 and a first bevel gear 123 arranged on the same transmission shaft, and a second bevel gear 124 coaxially connected with the rotary table 60; the first bevel gear 121 is in mesh transmission with the second bevel gear 122, and the first bevel gear 123 is in mesh transmission with the second bevel gear 124. The gear shifting mechanism 110 may adopt a two-stage or multi-stage gear shifting structure commonly used in the art to adjust the rotation speed of the rotary table 60.
As shown in fig. 8, a plurality of jaw seats 70 are disposed on the rotary table 60, and the jaw seats 70 can slide along the adjusting slide rails 61 on the rotary table 60, so as to adjust the distance between the jaw seats 70 and the workpiece, so as to clamp the irregularly-shaped workpiece.
As shown in fig. 9, the jaw seat 70 includes a mounting seat 71, a movable lead screw 72 and a jaw 73, the bottom of the mounting seat 71 is disposed on the adjusting slide 61 of the rotary table 60 by a positioning bolt 74, and is further locked by a locking bolt 75 and a locking block 76 disposed at the bottom of the locking bolt 75; the claw 73 is arranged on the mounting seat 71 and is in transmission connection with the mounting seat 71 through a movable lead screw 72; the outer end of the movable screw rod 72 is provided with an adjusting nut 77, the adjusting nut 77 can be rotated by a special tool to drive the clamping jaw 73 to reciprocate along the mounting seat 71, and then the position of the clamping jaw 73 can be adjusted, so that clamping and fixing of workpieces in different shapes can be met.
The utility model discloses a turning, mill, grind, boring, bore multi-functional walking beam combination machining center, through set up multiple cutters such as lathe tool, cutter head, bistrique, boring cutter, drill bit at first knife rest structure 40 and second knife rest structure 50, satisfied the various processing demands of work piece simultaneously to first knife rest structure 40's processing angle is adjustable, and portal frame 20 and second knife rest structure 50 all can remove, can satisfy the processing demand of the different positions of work piece.
The utility model has multiple purposes, can realize various processing techniques by one-time clamping, avoids the processing precision error caused by repeatedly clamping the workpiece, and simultaneously improves the processing efficiency; the machining tool can be suitable for machining workpieces with various regular and irregular shapes, such as various workpieces of shafts, cylinders, flanges, bent pipes and the like, can also be used for machining workpieces of blanks or semi-finishing type, has wide application range and strong universality, and is a high-tech comprehensive machining tool.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization of those skilled in the art; when the technical solutions are contradictory or cannot be combined, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Claims (10)
1. The utility model provides a turning, mill, grind, bore multi-functional walking beam combination machining center which characterized in that: the gantry type rotary cutting machine comprises a base, a gantry frame, a gantry workbench, a first tool rest structure, a second tool rest structure, a rotary workbench and a clamping jaw seat, wherein stand columns at two ends of the gantry frame are slidably arranged on the base, the gantry workbench is arranged between the bases at two sides, the first tool rest structure is rotatably arranged on a cross beam of the gantry frame, the second tool rest structure is movably arranged on the cross beam of the gantry frame, the rotary workbench is arranged on the gantry workbench, and the clamping jaw seat is arranged on the rotary workbench.
2. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 1, characterized in that: first knife rest structure includes first ram, first traveller, gyration slip table, gyration sword platform and a driving motor, first traveller sets up on the crossbeam of portal frame, the gyration slip table rotationally sets up on the first traveller, first ram slidable ground sets up on the gyration slip table, the gyration sword platform rotationally sets up first ram bottom, a driving motor sets up first ram top and through lead screw drive assembly with the transmission of gyration slip table is connected.
3. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 2, characterized in that: the revolving sliding table is connected with the first sliding column in a rotating mode through a worm transmission assembly, the worm transmission assembly comprises a worm and a worm driving motor, the worm is connected with the arc-shaped rack at the top end of the first sliding column in a transmission mode, and the two ends of the worm are connected with the revolving sliding table in a rotating mode.
4. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 1, characterized in that: the second tool rest structure comprises a second ram, a second ram column, a second driving motor and a cutter driving motor, the second ram column is arranged on a cross beam of the portal frame, the second ram column is slidably arranged on the second ram column, the second ram column and the second ram column are in transmission connection through a lead screw transmission assembly, and the cutter driving motor is arranged at the bottom end of the second ram column.
5. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 1, characterized in that: the rotary worktable is in transmission connection with a rotary driving assembly arranged inside the gantry worktable, the rotary driving assembly comprises a rotary driving motor, a gear shifting mechanism and a transmission mechanism, the rotary driving motor is connected with the transmission mechanism through the gear shifting mechanism, and the transmission mechanism is in transmission connection with the rotary worktable.
6. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 5, is characterized in that: the rotary worktable is provided with a plurality of jaw seats, each jaw seat comprises a mounting seat, a movable lead screw and a jaw, the mounting seats are adjustably arranged on the rotary worktable, and the jaws are arranged on the mounting seats and are in transmission connection with the mounting seats through the movable lead screws.
7. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 2, characterized in that: the rotary tool rest comprises a rotary seat, a rotary shaft sleeve, a pull rod and a handle, the rotary shaft sleeve penetrates through the axis of the rotary seat and is connected with the first ram in a rotating mode, the pull rod penetrates through the rotary shaft sleeve, one end of the pull rod is connected with the rotary shaft sleeve, the other end of the pull rod is connected with the handle in a rotating mode, and a plurality of tool mounting holes are formed in the periphery of the rotary seat.
8. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 7, is characterized in that: the bottom of the rotary seat is provided with a first gear ring, the first ram is provided with a second gear ring meshed with the first gear ring, and the rotary seat is rotatably arranged on the first ram through the first gear ring and the second gear ring.
9. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 1, characterized in that: and a tool magazine is also arranged on the portal frame.
10. The turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center according to claim 1, characterized in that: the base and the beam part of the portal frame are both provided with protective covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664444.XU CN211277652U (en) | 2019-09-30 | 2019-09-30 | Turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664444.XU CN211277652U (en) | 2019-09-30 | 2019-09-30 | Turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center |
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| Publication Number | Publication Date |
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| CN211277652U true CN211277652U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921664444.XU Active CN211277652U (en) | 2019-09-30 | 2019-09-30 | Turning, milling, grinding, boring and drilling multifunctional movable beam combined machining center |
Country Status (1)
| Country | Link |
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| CN (1) | CN211277652U (en) |
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- 2019-09-30 CN CN201921664444.XU patent/CN211277652U/en active Active
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