CN210475156U - Eccentric material punching machine - Google Patents
Eccentric material punching machine Download PDFInfo
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- CN210475156U CN210475156U CN201921385202.7U CN201921385202U CN210475156U CN 210475156 U CN210475156 U CN 210475156U CN 201921385202 U CN201921385202 U CN 201921385202U CN 210475156 U CN210475156 U CN 210475156U
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- 238000004080 punching Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 title description 8
- 238000003825 pressing Methods 0.000 claims abstract description 50
- 238000003754 machining Methods 0.000 description 3
- 239000000872 buffer Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses an eccentric punching machine, which comprises a machine body, a fixing device, a rotating device and a pressing device, wherein the fixing device comprises a motor I, a rack I, a straight gear I, a rotating rod I, a rotating block I and a concave block I, a cavity I is arranged in the machine body, a plurality of first telescopic rods are fixed on the upper end surface of the rotating block I, a spring I is fixed in the telescopic rod I, a first sliding block is fixed on the upper end surface of the first telescopic rod, a second rack is fixed on the inner wall of the first concave block, a first fixed block is arranged on the upper end surface of the first concave block, a first grinding tool block is fixed on the upper end surface of the first fixed block, a first threaded rod is symmetrically fixed on the upper end surface of the first concave block, a first positioning block which is in sliding fit with the first threaded rod is arranged on the side wall of the first threaded rod, and a first nut which is in threaded fit with the first threaded rod is arranged on the, meanwhile, the problem that the grinding tool is cracked due to severe impact on the grinding tool is solved.
Description
Technical Field
The utility model relates to a dash material machine equipment field, in particular to eccentric material machine that dashes.
Background
The punching machine drives a flywheel through a motor and drives a drawing die to form the steel plate through a clutch.
Traditional dashing material machine is when carrying out the press mold to the work piece, and the atress is inhomogeneous and lead to uneven phenomenon can appear in the work piece, dashes the material machine simultaneously and in the in-process of operation, because inertial reason leads to the grinding apparatus to receive violent striking to lead to the cracked problem of grinding apparatus to appear.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an eccentric material machine that dashes has solved and has dashed the inhomogeneous problem of atress of material machine when carrying out the press mold to the work piece, has solved the grinding apparatus simultaneously and has received violent striking and produce the cracked problem of grinding apparatus.
The above technical purpose of the present invention can be achieved by the following technical solutions:
an eccentric punching machine comprises a machine body, a fixing device, a rotating device and a pressing device, wherein the fixing device is arranged on the upper end face of the machine body, the fixing device is in rotating fit with the upper end face of the machine body, the rotating device is fixed on the upper end face of the machine body, the pressing device is arranged in the rotating device, the fixing device comprises a first motor, a first rack, a first straight gear, a first rotating rod, a first rotating block and a first concave block, the first rotating block is arranged on the upper end face of the machine body and is in rotating fit with the upper end face of the machine body, a first cavity is formed in the machine body, the first motor is fixed on the inner wall of the first cavity, an output shaft of the first motor penetrates through the inner wall of the first cavity and is in fixed fit with the first rotating block, a plurality of first telescopic rods are fixed on the upper end face of the first rotating block, a first spring is fixed in the first telescopic rods, and a first sliding block is, the first concave block is arranged on the upper end surface of the first sliding block and is in sliding fit with the first sliding block, the first rack is fixed on the side wall of the first rotating block, the first rotating rod is arranged on the upper end surface of the machine body, the first straight gear is fixed on the side wall of the first rotating rod, the first straight gear is matched with the first rack gear, the inner wall of the first concave block is fixed with a second rack, the second rack is matched with the first straight gear, the first concave block is provided with a first fixed block on the upper end surface, a first grinding tool block is fixed on the upper end face of the first fixing block, a first threaded rod is symmetrically fixed on the upper end face of the first concave block, first positioning blocks in sliding fit with the first threaded rod are arranged on the side walls of the first threaded rod, and the lower end face of the positioning block is attached to the upper end face of the first fixing block, and the side wall of the first threaded rod is provided with a first nut in threaded fit with the first threaded rod.
By adopting the technical scheme, when a workpiece needs to be processed, the workpiece is placed on the first grinding tool block, the first nut is manually rotated, the first nut is in threaded fit with the first threaded rod, and the first positioning block is in sliding fit with the first threaded rod, so that the first nut is rotated to drive the first threaded rod to move on itself, when the first nut moves to be attached to the first positioning block, the first positioning block drives the first positioning block to move, when the first positioning block moves to be attached to the first fixing block, the first positioning block is fixed to the first fixing block to prevent deviation generated during subsequent workpiece processing, when the workpiece needs to be processed, an output shaft of the first motor penetrates through the inner wall of the first cavity to be fixedly matched with the first rotating block, so that the first rack is fixed on the side wall of the first rotating block, the first rotating block drives the first rack to rotate, and the first straight gear is matched with the first rack, thereby rack one rotates and drives the rotation of straight-teeth gear, spill piece one sets up in the up end of rotating block one, rack two is fixed in on the inner wall of spill piece one, and rack two and straight-teeth gear cooperation, thereby straight-teeth gear rotates and drives rack two and rotates, rack two rotates and drives spill piece one and rotate, fixed block one sets up in the up end of spill piece one, thereby spill piece one rotates and drives fixed block one and rotate, grinding apparatus piece one is fixed in the up end of fixed block one, thereby fixed block one rotates and drives grinding apparatus piece one and rotate, realize that grinding apparatus piece one drives the work piece and rotates the position that needs, when the work piece is adding man-hour, the effect of buffering together of spring a pair of grinding apparatus piece in the telescopic link one, prevent that grinding apparatus piece one from appearing the crackle when adding.
As preferred, rotary device includes straight-teeth gear two, straight-teeth gear three, bevel gear one, bevel gear two and motor two, the up end symmetry of organism is fixed with concave supporting shoe one, the up end of supporting shoe one is fixed with gear box one, cavity two has been seted up to the lower terminal surface of gear box one, be provided with on the inner wall of cavity two with two rotation fit's of cavity rotary rod two, motor two is fixed in on the lateral wall of gear box one, just the output shaft of motor two runs through the lateral wall and the fixed cooperation of rotary rod two of gear box one, straight-teeth gear two sets up on the lateral wall that motor two was kept away from to gear box one, just rotary rod two runs through the inner wall and the fixed cooperation of straight-teeth gear two of cavity two.
Adopt above-mentioned technical scheme, when the grinding apparatus piece was placed to the work piece on, the second start-up of motor, because the output shaft of motor two runs through the lateral wall and the two fixed coordination of rotary rod of gear box one to the output shaft of motor two rotates and drives two rotations of rotary rod, and the one end that second motor was kept away from to rotary rod runs through the inner wall and two fixed coordination of straight-teeth gear of cavity two, thereby two rotations of rotary rod drive two rotations of straight-teeth gear.
As preferred, straight-teeth gear three sets up on the lateral wall of gear box one, just straight-teeth gear two and the cooperation of straight-teeth gear three, be provided with in the cavity two with two rotary fit's of cavity rotary rod three, just the inner wall and the three fixed coordination of straight-teeth gear of cavity two are run through to the one end of rotary rod three, bevel gear one sets up in cavity two with bevel gear two, bevel gear one and the cooperation of two gears of bevel gear, just bevel gear one is fixed in on the lateral wall of rotary rod three, be provided with in the cavity two with two rotary fit's of cavity threaded rod two, just bevel gear two is fixed in on the lateral wall of two.
Adopt above-mentioned technical scheme, when straight-teeth gear two rotates, because straight-teeth gear two and the cooperation of straight-teeth gear three, thereby straight-teeth gear two rotates and drives straight-teeth gear three and rotates, the inner wall that cavity two is run through to the one end of rotary rod three is in the three fixed coordination of straight-teeth gear, thereby straight-teeth gear three rotates and drives the three rotations of rotary rod, bevel gear one is fixed in on the lateral wall of rotary rod three, thereby rotary rod three rotates and drives bevel gear one and rotate, bevel gear two is fixed in on the lateral wall of threaded rod two, the one end of threaded rod two and the inner wall normal running fit of cavity two, and bevel gear one and the cooperation of bevel gear two, thereby bevel gear one rotates and drives bevel gear two and rotates, it rotates.
Preferably, the pressing device comprises a first pressing block and a first pressing grinding tool, the first pressing block is arranged on the side wall of the second threaded rod, the first pressing block is in threaded fit with the second threaded rod, two ends of the first pressing block are in sliding fit with the inner wall of the first concave supporting block, and the first pressing grinding tool is fixed on the side wall, far away from the second threaded rod, of the first pressing block.
By adopting the technical scheme, when the second threaded rod rotates, the second motor is in an operating state at the moment, and the first threaded rod and the second threaded rod are in threaded fit according to the first pressing block and the second threaded rod, and the two ends of the first pressing block are in sliding fit with the inner wall of the first concave supporting block, so that the second threaded rod rotates to drive the first concave supporting block to move, the first pressing tool is fixed on the first pressing block, the second threaded rod is far away from the side wall of the second threaded rod, the first pressing tool is moved to drive the first pressing tool to move, and the pressing.
Preferably, a support leg is fixed to a lower end surface of the machine body.
By adopting the technical scheme, the support legs are used for supporting the machine body.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
FIG. 2 is a schematic view of an embodiment of a fixture;
FIG. 3 is a schematic view of an embodiment of a rotating device;
fig. 4 is a schematic view of an embodiment of a pressing device.
Reference numerals: 1. a body; 2. a fixing device; 3. a rotating device; 4. a pressing device; 5. a first motor; 6. a first rack; 7. a first straight gear; 8. rotating the rod I; 9. rotating the first block; 10. a first concave block; 11. a first cavity; 12. a first telescopic rod; 13. a first sliding block; 14. a first fixed block; 15. a first grinding tool block; 16. a first threaded rod; 17. a first positioning block; 18. a first nut; 19. a second straight gear; 20. a third straight gear; 21. a first bevel gear; 22. a second bevel gear; 23. a second motor; 24. a first supporting block; 25. a first gear box; 26. a second cavity; 27. rotating the rod II; 28. rotating a rod III; 29. a second threaded rod; 30. pressing the first block; 31. pressing the first grinding tool; 32. a support leg; 33. a first spring; 34. and a second rack.
Detailed Description
The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.
As shown in fig. 1 to 4, an eccentric punching machine includes a machine body 1, a fixing device 2, a rotating device 3 and a pressing device 4, wherein the fixing device 2 is disposed on an upper end surface of the machine body 1, the fixing device 2 is rotatably fitted on the upper end surface of the machine body 1, the rotating device 3 is fixed on the upper end surface of the machine body 1, and the pressing device 4 is disposed in the rotating device 3.
The fixing device 2 comprises a first motor 5, a first rack 6, a first straight gear 7, a first rotating rod 8, a first rotating block 9 and a first concave block 10, a first fixing block 14 is arranged on the upper end face of the first concave block 10, a first grinding tool block 15 is fixed on the upper end face of the first fixing block 14, first threaded rods 16 are symmetrically fixed on the upper end face of the first concave block 10, first positioning blocks 17 in sliding fit with the first threaded rods 16 are arranged on the side walls of the first threaded rods 16, the lower end faces of the first positioning blocks 17 are attached to the upper end face of the first fixing block 14, and first nuts 18 in threaded fit with the first threaded rods 16 are arranged on the side walls of the first threaded rods 16.
When a workpiece needs to be machined, the workpiece is placed on the first grinding tool block 15, the first nut 18 is manually rotated, the first nut 18 is in threaded fit with the first threaded rod 16, and the first positioning block 17 is in sliding fit with the first threaded rod 16, so that the first nut 18 rotates to drive the first nut to move on the first threaded rod 16, when the first nut 18 moves to be attached to the first positioning block 17, the first nut 18 drives the first positioning block 17 to move, and when the first positioning block 17 moves to be attached to the first fixing block 14, the first positioning block 17 fixes the first fixing block 14, and offset generated during subsequent workpiece machining is prevented.
A first rotating block 9 is arranged on the upper end face of a machine body 1, the first rotating block 9 is in rotating fit with the upper end face of the machine body 1, a first cavity 11 is formed in the machine body 1, a first motor 5 is fixed on the inner wall of the first cavity 11, an output shaft of the first motor 5 penetrates through the inner wall of the first cavity 11 and is fixedly matched with the first rotating block 9, a plurality of first telescopic rods 12 are fixed on the upper end face of the first rotating block 9, first springs 33 are fixed in the first telescopic rods 12, first sliding blocks 13 are fixed on the upper end face of the first telescopic rods 12, first concave blocks 10 are arranged on the upper end face of the first sliding blocks 13, first concave blocks 10 are in sliding fit with the first sliding blocks 13, first racks 6 are fixed on the side walls of the first rotating blocks 9, first rotating rods 8 are arranged on the upper end face of the machine body 1, first straight gears 7 are fixed on the side walls of the first rotating rods 8, the first straight gears 7 are matched, and the second rack 34 is matched with the first straight gear 7.
When a workpiece needs to be machined, an output shaft of a motor I5 penetrates through the inner wall of a cavity I11 and is fixedly matched with a rotating block I9, so that the output shaft of the motor I5 rotates to drive the rotating block I9 to rotate, a rack I6 is fixed on the side wall of the rotating block I9, so that the rotating block I9 rotates to drive the rack I6 to rotate, a straight gear I7 is matched with a gear of the rack I6, so that the rack I6 rotates to drive the straight gear I7 to rotate, a concave block I10 is arranged on the upper end face of the rotating block I9, a rack II 34 is fixed on the inner wall of the concave block I10, the rack II 34 is matched with the gear of the straight gear I7, so that the straight gear I7 rotates to drive the rack II 34 to rotate, the rack II 34 rotates to drive the concave block I10 to rotate, a fixed block I14 is arranged on the upper end face of the concave block I10, so that the concave block I, therefore, the first fixing block 14 rotates to drive the first grinding tool block 15 to rotate, the first grinding tool block 15 drives the workpiece to rotate to a required position, when the workpiece is machined, the first spring in the first telescopic rod buffers the first grinding tool block together, cracks are prevented from occurring in the first grinding tool block during machining, and when the workpiece is machined, the first spring 33 in the first telescopic rod 12 buffers the first grinding tool block 15, and cracks are prevented from occurring in the first grinding tool block 15 during machining.
The rotating device 3 comprises a second straight gear 19, a third straight gear 20, a first bevel gear 21, a second bevel gear 22 and a second motor 23, concave supporting blocks 24 are symmetrically fixed on the upper end face of the machine body 1, a first gear box 25 is fixed on the upper end face of the supporting blocks 24, a second cavity 26 is formed in the lower end face of the first gear box 25, a second rotating rod 27 in rotating fit with the second cavity 26 is arranged on the inner wall of the second cavity 26, the second motor 23 is fixed on the side wall of the first gear box 25, the output shaft of the second motor 23 penetrates through the side wall of the first gear box 25 to be fixedly matched with the second rotating rod 27, the second straight gear 19 is arranged on the side wall of the first gear box 25, which is far away from the second motor 23, and the second rotating rod 27 penetrates through.
When a workpiece is placed on the first grinding tool block 15, the second motor 23 is started, and the output shaft of the second motor 23 penetrates through the side wall of the first gear box 25 and is fixedly matched with the second rotating rod 27, so that the output shaft of the second motor 23 rotates to drive the second rotating rod 27 to rotate, one end, far away from the second motor 23, of the second rotating rod 27 penetrates through the inner wall of the second cavity 26 and is fixedly matched with the second straight gear 19, and the second rotating rod 27 rotates to drive the second straight gear 19 to rotate.
The third straight gear 20 is arranged on the side wall of the first gear box 25, the second straight gear 19 is in gear fit with the third straight gear 20, a third rotating rod 28 in rotary fit with the second cavity 26 is arranged in the second cavity 26, one end of the third rotating rod 28 penetrates through the inner wall of the second cavity 26 and is in fixed fit with the third straight gear 20, the first bevel gear 21 and the second bevel gear 22 are arranged in the second cavity 26, the first bevel gear 21 is in gear fit with the second bevel gear 22, the first bevel gear 21 is fixed on the side wall of the third rotating rod 28, a second threaded rod 29 in rotary fit with the second cavity 26 is arranged in the second cavity 26, and the second bevel gear 22 is fixed on the side wall of the.
When the second straight gear 19 rotates, the second straight gear 19 is in gear fit with the third straight gear 20, so that the second straight gear 19 rotates to drive the third straight gear 20 to rotate, one end of the third rotary rod 28 penetrates through the inner wall of the second cavity 26 and is fixedly matched with the third straight gear 20, the third straight gear 20 rotates to drive the third rotary rod 28 to rotate, the first bevel gear 21 is fixed on the side wall of the third rotary rod 28, the third rotary rod 28 rotates to drive the first bevel gear 21 to rotate, the second bevel gear 22 is fixed on the side wall of the second threaded rod 29, one end of the second threaded rod 29 is in gear fit with the inner wall of the second cavity 26, and the first bevel gear 21 is in gear fit with the second bevel gear 22, so that the first bevel gear 21 rotates to drive the second bevel gear 22 to rotate, and the.
The pressing device 4 comprises a first pressing block 30 and a first pressing grinding tool 31, the first pressing block 30 is arranged on the side wall of the second threaded rod 29, the first pressing block 30 is in threaded fit with the second threaded rod 29, two ends of the first pressing block 30 are in sliding fit with the inner wall of the first concave supporting block 24, the first pressing grinding tool 31 is fixed on the side wall, away from the second threaded rod 29, of the first pressing block 30, and supporting legs 32 are fixed on the lower end face of the machine body 1.
When the second threaded rod 29 rotates, the second motor 23 is in a running state, the first pressing block 30 is in threaded fit with the side wall of the second threaded rod 29, and the two ends of the first pressing block 30 are in sliding fit with the inner wall of the first concave supporting block 24, so that the second threaded rod 29 rotates to drive the first concave supporting block 24 to move, the first pressing grinding tool 31 is fixed on the side wall of the first pressing block 30, which is far away from the second threaded rod 29, the first pressing block 30 moves to drive the first pressing grinding tool 31 to move, pressing of the first pressing grinding tool 31 on a workpiece is achieved, and the support leg 32 is used for supporting the machine body.
Claims (5)
1. The eccentric blanking machine is characterized by comprising a machine body (1), a fixing device (2), a rotating device (3) and a pressing device (4), wherein the fixing device (2) is arranged on the upper end face of the machine body (1), the fixing device (2) is in rotating fit with the upper end face of the machine body (1), the rotating device (3) is fixed on the upper end face of the machine body (1), the pressing device (4) is arranged in the rotating device (3), the fixing device (2) comprises a motor I (5), a rack I (6), a straight gear I (7), a rotating rod I (8), a rotating block I (9) and a concave block I (10), the rotating block I (9) is arranged on the upper end face of the machine body (1), the rotating block I (9) is in rotating fit with the upper end face of the machine body (1), a cavity I (11) is arranged in the machine body (1), the motor I (5) is fixed on the inner wall of the cavity I (11), an output shaft of the motor I (5) penetrates through the inner wall of the cavity I (11) to be fixedly matched with the rotating block I (9), a plurality of first telescopic rods (12) are fixed on the upper end face of the rotating block I (9), springs I (33) are fixed in the first telescopic rods (12), sliders I (13) are fixed on the upper end faces of the first telescopic rods (12), concave blocks I (10) are arranged on the upper end faces of the sliders I (13), the concave blocks I (10) are in sliding fit with the sliders I (13), the rack I (6) is fixed on the side wall of the rotating block I (9), the rotating rod I (8) is arranged on the upper end face of the machine body (1), the straight gear I (7) is fixed on the side wall of the rotating rod I (8), and the straight gear I (7) is in gear fit with the rack I (6), the grinding wheel is characterized in that a second rack (34) is fixed on the inner wall of the first concave block (10), the second rack (34) is matched with a first straight gear (7) through a gear, a first fixed block (14) is arranged on the upper end face of the first concave block (10), a first grinding tool block (15) is fixed on the upper end face of the first fixed block (14), first threaded rods (16) are symmetrically fixed on the upper end face of the first concave block (10), first positioning blocks (17) in sliding fit with the first threaded rods (16) are arranged on the side walls of the first threaded rods (16), the lower end faces of the first positioning blocks (17) are attached to the upper end faces of the first fixed blocks (14), and first nuts (18) in threaded fit with the first threaded rods (16) are arranged on the side walls of the first threaded rods (16).
2. The eccentric punching machine according to claim 1, wherein the rotating device (3) comprises a second straight gear (19), a third straight gear (20), a first bevel gear (21), a second bevel gear (22) and a second motor (23), a concave supporting block (24) is symmetrically fixed on the upper end surface of the machine body (1), a first gear box (25) is fixed on the upper end surface of the supporting block (24), a second cavity (26) is formed in the lower end surface of the first gear box (25), a second rotating rod (27) which is in rotating fit with the second cavity (26) is arranged on the inner wall of the second cavity (26), the second motor (23) is fixed on the side wall of the first gear box (25), an output shaft of the second motor (23) penetrates through the rotating rod of the side wall of the first gear box (25) to be fixedly matched with the second rotating rod (27), the second straight gear (19) is arranged on the side wall of the first gear box (25) far away from the second motor (23), and the second rotating rod (27) penetrates through the inner wall of the second cavity (26) and is fixedly matched with the second straight gear (19).
3. The eccentric blanking machine according to claim 2, characterized in that the third spur gear (20) is arranged on the side wall of the first gear box (25), the second straight gear (19) is matched with the third straight gear (20) in a gear way, a third rotating rod (28) which is rotationally matched with the second cavity (26) is arranged in the second cavity (26), one end of the third rotating rod (28) penetrates through the inner wall of the second cavity (26) to be fixedly matched with the third straight gear (20), the first bevel gear (21) and the second bevel gear (22) are arranged in the second cavity (26), the first bevel gear (21) is in gear fit with the second bevel gear (22), and the bevel gear I (21) is fixed on the side wall of the rotating rod III (28), a second threaded rod (29) which is rotationally matched with the second cavity (26) is arranged in the second cavity (26), and the second bevel gear (22) is fixed on the side wall of the second threaded rod (29).
4. The eccentric blanking machine according to claim 3, wherein the pressing device (4) comprises a first pressing block (30) and a first pressing grinding tool (31), the first pressing block (30) is arranged on the side wall of the second threaded rod (29), the first pressing block (30) is in threaded fit with the second threaded rod (29), two ends of the first pressing block (30) are in sliding fit with the inner wall of the first concave supporting block (24), and the first pressing grinding tool (31) is fixed on the side wall of the first pressing block (30) far away from the second threaded rod (29).
5. The eccentric blanking machine according to claim 4, characterized in that a foot (32) is fixed to the lower end surface of the machine body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921385202.7U CN210475156U (en) | 2019-08-23 | 2019-08-23 | Eccentric material punching machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921385202.7U CN210475156U (en) | 2019-08-23 | 2019-08-23 | Eccentric material punching machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210475156U true CN210475156U (en) | 2020-05-08 |
Family
ID=70539146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921385202.7U Expired - Fee Related CN210475156U (en) | 2019-08-23 | 2019-08-23 | Eccentric material punching machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210475156U (en) |
-
2019
- 2019-08-23 CN CN201921385202.7U patent/CN210475156U/en not_active Expired - Fee Related
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Granted publication date: 20200508 |