CN113459012B - High stop gear for machining of stability - Google Patents
High stop gear for machining of stability Download PDFInfo
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- CN113459012B CN113459012B CN202111031039.6A CN202111031039A CN113459012B CN 113459012 B CN113459012 B CN 113459012B CN 202111031039 A CN202111031039 A CN 202111031039A CN 113459012 B CN113459012 B CN 113459012B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
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Abstract
The invention discloses a high-stability limiting mechanism for machining, which comprises two vertical sliding structures, wherein the upper surfaces of the two vertical sliding structures are movably connected with a transverse sliding structure, one end of each vertical sliding structure is provided with a driving structure, the outer side of each transverse sliding structure is movably connected with an external connecting structure, one side of one vertical sliding structure is fixedly provided with a limiting frame, the inner part of the limiting frame is movably connected with a power transmission flat cable, the outer side of the external connecting structure is fixedly provided with a clamping structure, and each vertical sliding structure comprises a vertical sliding frame, a limiting inner groove, a folding plate A and a connecting shaft. The invention realizes the functions of convenient fixation and quick installation of the device and has simple structure.
Description
Technical Field
The invention relates to the technical field of machining equipment, in particular to a high-stability limiting mechanism for machining.
Background
When an existing workpiece is machined or cut, the workpiece needs to be limited, so that the subsequent machining stability of the workpiece is improved, and the subsequent machining speed and accuracy of the workpiece are improved.
Current stop gear for machining, when using, its stability is perfect inadequately, produces the clearance very easily after fixing the product, causes the machining size deviation to the device is comparatively limited, can only install single clamping structure and product, and inner structure uses for a long time simultaneously, receives the outside condition invasion and attack easily, leads to influencing the inside structure of device.
Disclosure of Invention
The invention aims to provide a limiting mechanism for machining with high stability, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high-stability limiting mechanism for machining comprises two vertical sliding structures, wherein the upper surfaces of the two vertical sliding structures are movably connected with a transverse sliding structure, one ends of the two vertical sliding structures are provided with driving structures, the outer side of the transverse sliding structure is movably connected with an external connecting structure, one side of one vertical sliding structure is fixedly provided with a limiting frame, the inside of the limiting frame is movably connected with a power transmission flat cable, and the outer side of the external connecting structure is fixedly provided with a clamping structure;
the vertical sliding structure comprises vertical sliding frames, limiting inner grooves, folding plates A, connecting shafts, driving shafts, limiting sliding pins and fixed ends, wherein the limiting inner grooves are symmetrically arranged on two sides of the inner wall of each vertical sliding frame, the folding plates A are arranged in the limiting inner grooves, every two folding plates A are connected through the connecting shafts, the driving shaft at one end of the driving structure is movably connected at the middle position in each vertical sliding frame, the two limiting sliding pins are symmetrically arranged on the bottom surface of the inner wall of each vertical sliding frame, one end of each folding plate A is provided with the fixed end, the external connecting structure comprises an external support, a driving pin, a driving hole pin, a limiting sliding groove, an inserting hole, an adjusting bolt, an adjusting shaft and a clamping pin, the driving pin is arranged on the outer surface of one side of the external support, the driving hole pin is arranged in the internal part of the driving pin, and the limiting sliding grooves are arranged at the upper end and the lower end of the driving pin, two inserting holes are symmetrically arranged on the outer surface of the other side of the external support, the upper end and the lower end of the external support are movably connected with adjusting bolts, the lower surface of the adjusting bolt is provided with an adjusting shaft, the lower end of the outer side of the adjusting shaft is movably connected with a bayonet lock, the clamping structure comprises a fixed base, a fixed pin, a movable pin, a supporting seat, a supporting screw rod, a hexagonal pin, a fixed bolt and a locking groove, a fixed pin is arranged on the outer side of the upper surface of the fixed base, the lower end of the fixed pin is movably connected with a movable pin on the outer side of the fixed base, the lower surface of the movable pin is movably connected with a supporting screw rod, the outer surface of the lower end of the fixed base is provided with a supporting seat, the lower extreme of supporting screw is provided with the hexagonal round pin, the surface symmetry of unable adjustment base opposite side is provided with two fixing bolt, two fixing bolt's surface all is provided with the locking groove.
Preferably, the lateral sliding structure includes horizontal balladeur train, folded sheet B, connects base, sliding pin seat, cooperation kerve, screw hole, grafting end and locating hole groove, the surface range of horizontal balladeur train one side has folded sheet B, folded sheet B is unanimous with folded sheet A structure, the equal fixed mounting of lower surface at horizontal balladeur train both ends has the connection base, the lower fixed surface who connects the base installs the sliding pin seat, the lower surface symmetry of sliding pin seat is provided with the cooperation kerve, the inside of sliding pin seat is provided with the screw hole, the upper surface of sliding pin seat is provided with the grafting end, two the lower surface of connecting the base all is provided with the locating hole groove.
Preferably, the connecting shaft is connected with the two folding plates A through a shaft pin, and two ends of each connecting shaft are provided with miniature rollers.
Preferably, the connecting shaft and the limiting inner groove are supported through a micro rolling shaft, and the limiting inner groove is connected with the micro rolling shaft in a sliding mode.
Preferably, two the stiff end all is connected with the both sides of connecting the base, the stiff end passes through the draw-in groove with the surface of connecting the base both sides and fixes.
Preferably, the driving structure comprises a driving motor and a gear set, and the driving shaft extends into the driving structure and is in meshing transmission with the gear set through a tooth socket.
Preferably, one end of the transverse sliding structure is provided with a driving structure, the inside of the transverse sliding frame is provided with a driving shaft, the inside of the transverse sliding frame is consistent with the inside structure of the vertical sliding frame, and the outer surface of one side of the external support and the outer surface of one side of the transverse sliding frame are driven by matching of a transmission hole pin and the driving shaft.
Preferably, the external support and the fixed base are fixed through the matching of the fixed bolt and the inserting hole, and are reinforced through the matching of the bayonet lock and the locking groove.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the matching of the driving shaft, the sliding pin seat, the positioning hole groove and the inserting end, and the thread meshing transmission of the driving shaft and the sliding pin seat, the positioning hole groove and the inserting end, the generation of a gap can be greatly reduced, so that the gap during the processing of the device is shortened, the processing size is further ensured, through the matching of the external connecting structure and the clamping structure, the external connecting structure and the clamping structure are fixedly connected with each other through the inserting hole and the fixing bolt, and are reinforced through the clamping pin, the stability between the external connecting structure and the clamping structure can be improved, the operation is convenient, the use is simple, the fixing bolt can be arranged on other external structures, the installation of various external connecting structures of the device can be realized, and the device has various fixing modes;
2. according to the invention, through the matching of the folding plate A and the connecting shaft, the upper surface and the interior of the vertical sliding frame can be covered, and the folding structure can be automatically adjusted along with the position of the device, so that the storage function and the space utilization rate of the folding plate A can be greatly improved, and the device can realize the protection function of the internal structure.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic view of a cross carriage configuration of the present invention;
FIG. 3 is a schematic view of the internal structure of the vertical carriage of the present invention;
FIG. 4 is a schematic view of an external bracket according to the present invention;
FIG. 5 is a schematic view of the internal structure of the circumscribed support of the present invention;
FIG. 6 is a schematic view of a fixing base structure according to the present invention.
In the figure: 1. a vertical sliding structure; 101. a vertical carriage; 102. limiting the inner groove; 103. folding the plate A; 104. a connecting shaft; 105. a drive shaft; 106. a limiting sliding pin; 107. a fixed end; 2. a lateral sliding structure; 201. a transverse carriage; 202. folding the board B; 203. connecting a base; 204. a sliding pin seat; 205. matching with the bottom groove; 206. a threaded hole; 207. a plug end; 208. a positioning hole groove; 3. a drive structure; 4. an external connection structure; 401. the bracket is externally connected; 402. a drive pin; 403. a drive hole pin; 404. a limiting chute; 405. inserting holes; 406. adjusting the bolt; 407. an adjustment shaft; 408. a bayonet lock; 5. a limiting frame; 6. a power transmission flat cable; 7. a clamping structure; 701. a fixed base; 702. fixing a pin; 703. a movable pin; 704. a supporting seat; 705. a support screw; 706. a hexagonal pin; 707. fixing the bolt; 708. and (4) locking the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, an embodiment of the present invention includes: a high-stability limiting mechanism for machining comprises vertical sliding structures 1, the number of the vertical sliding structures 1 is two, the upper surfaces of the two vertical sliding structures 1 are movably connected with transverse sliding structures 2, a vertical sliding effect can be provided for a device under the action of the transverse sliding structures 2, and a supporting function is achieved, a driving structure 3 is arranged at one end of each of the two vertical sliding structures 1, an external connecting structure 4 is movably connected to the outer side of each of the transverse sliding structures 2, a limiting frame 5 is fixedly installed on one side of one of the vertical sliding structures 1, a power transmission flat cable 6 is movably connected to the inner portion of each of the limiting frames 5, and a clamping structure 7 is fixedly installed on the outer side of each of the external connecting structures 4;
the vertical sliding structure 1 comprises a vertical sliding frame 101, limiting inner grooves 102, folding plates A103, a connecting shaft 104, a driving shaft 105, limiting sliding pins 106 and a fixed end 107, wherein the limiting inner grooves 102 are symmetrically arranged on two sides of the inner wall of the vertical sliding frame 101, the folding plates A103 are arranged in the limiting inner grooves 102, every two folding plates A103 are connected through the connecting shaft 104, the connecting effect can be provided between the two folding plates A103 under the action of the connecting shaft 104, so that the folding effect of the folding plates A103 is realized, the driving shaft 105 positioned at one end of the driving structure 3 is movably connected at the middle position in the vertical sliding frame 101, the two limiting sliding pins 106 are symmetrically arranged on the bottom surface of the inner wall of the vertical sliding frame 101, the fixed end 107 is arranged at one end of the two folding plates A103, the external connection structure 4 comprises an external support 401, a driving pin 402, a driving hole pin 403, a limiting sliding chute 404, a plug hole 405, an adjusting bolt 406, An adjusting shaft 407 and a locking pin 408, a driving pin 402 is arranged on the outer surface of one side of the external bracket 401, a driving hole pin 403 is arranged inside the driving pin 402, a limiting sliding groove 404 is arranged at each of the upper and lower ends of the driving pin 402, two insertion holes 405 are symmetrically arranged on the outer surface of the other side of the external bracket 401, an adjusting bolt 406 is movably connected at each of the upper and lower ends of the external bracket 401, an adjusting shaft 407 is arranged on the lower surface of the adjusting bolt 406, a locking pin 408 is movably connected at the lower end of the outer side of the adjusting shaft 407, the clamping structure 7 comprises a fixed base 701, a fixed pin 702, a movable pin 703, a supporting seat 704, a supporting screw 705, a hexagonal pin 706, a fixed pin 707 and a locking groove 708, the fixed pin 702 is arranged on the outer side of the upper surface of the fixed base 701, the movable pin 703 outside the fixed base 701 is movably connected at the lower end of the fixed pin 702, the supporting screw 705 is movably connected at the lower surface of the movable pin 703, the supporting seat 704 is arranged on the outer surface of the lower end of the fixed base 701, the lower end of the supporting screw 705 is provided with a hexagonal pin 706, the outer surface of the other side of the fixed base 701 is symmetrically provided with two fixed bolts 707, and the outer surfaces of the two fixed bolts 707 are provided with locking grooves 708.
Further, the lateral sliding structure 2 includes a lateral sliding frame 201, a folding plate B202, a connection base 203, a sliding pin seat 204, a matching bottom groove 205, a threaded hole 206, a plug-in end 207 and a positioning hole groove 208, the folding plate B202 is arranged on the outer surface of one side of the lateral sliding frame 201, the folding plate B202 is consistent with the folding plate a103 in structure, the connection base 203 is fixedly installed on the lower surfaces of the two ends of the lateral sliding frame 201, the sliding pin seat 204 is fixedly installed on the lower surface of the connection base 203, the matching bottom groove 205 is symmetrically arranged on the lower surface of the sliding pin seat 204, the threaded hole 206 is arranged inside the sliding pin seat 204, the plug-in end 207 is arranged on the upper surface of the sliding pin seat 204, the positioning hole grooves 208 are arranged on the lower surfaces of the two connection bases 203, and a vertical sliding effect can be provided for the device through the effect of the lateral sliding structure 2, and a supporting function is achieved.
Further, the connecting shaft 104 is connected with the two folding plates A103 through a shaft pin, the two ends of each connecting shaft 104 are provided with miniature rollers, and the connecting effect can be provided between the two folding plates A103 through the action of the connecting shaft 104, so that the folding effect of the folding plates A103 is realized.
Further, the connecting shaft 104 and the limiting inner groove 102 are supported by a micro roller, and the limiting inner groove 102 and the micro roller are connected in a sliding manner, so that the supporting and sliding effects can be provided for the connecting shaft 104 through the mechanism.
Further, two stiff ends 107 all are connected with the both sides of connecting base 203, and stiff end 107 passes through the draw-in groove with the surface of connecting base 203 both sides to be fixed, through this mechanism, can realize dustproof effect.
Further, the driving structure 3 includes a driving motor and a gear set, and the driving shaft 105 extends into the driving structure 3 to be in meshing transmission with the gear set through a tooth socket, and through this mechanism, the driving effect of the device can be achieved.
Further, the one end of lateral sliding structure 2 all is provided with drive structure 3, and the inside of horizontal balladeur train 201 all is provided with drive shaft 105, and the inside of horizontal balladeur train 201 is unanimous with vertical balladeur train 101 inner structure, and the surface of external support 401 one side and the surface of horizontal balladeur train 201 one side pass through the cooperation drive of transmission hole round pin 403 and drive shaft 105, through this mechanism, can realize the lateral sliding effect of device to it slides to drive external connection structure 4.
Further, the external bracket 401 and the fixed base 701 are fixed through the matching of the fixed bolt 707 and the inserting hole 405, and are reinforced through the matching of the bayonet 408 and the locking groove 708, and through the mechanism, the function of convenient detachment of the device and the quick fixing operation can be realized.
When the device is used, the driving shaft 105 of the internal structure of the driving structure 3 rotates, so that the driving shaft 105 and the sliding pin seat 204 realize threaded meshing transmission, the two vertical sliding frames 101 simultaneously rotate, the transverse sliding structure 2 is driven to realize a vertical sliding function, when the device slides, the fixed end 107 is fixedly connected with the two ends of the connecting base 203, so that the transverse sliding frame 201 drives the folding plate A103 to realize folding and unfolding actions when the transverse sliding frame slides, the folding plate A103 is ensured to always realize a covering function on the upper surface of the vertical sliding frame 101, the transverse sliding effect of the external connecting structure 4 can be realized through the transverse sliding structure 2, when the clamping structure 7 is installed, one end of the two fixed bolts 707 is firstly completely inserted into the inserting hole 405, then the two adjusting bolts 406 are rotated, so that the adjusting shaft 407 realizes threaded meshing transmission, the clamping pin 408 is driven to realize lifting, and the clamping pin 408 is clamped into the locking groove 708, a clamping state is formed, so that the fixing operation of the clamping structure 7 is realized, the hexagonal pin 706 is rotated through the external wrench, the supporting screw 705 is driven to rotate, the supporting screw 705 and the supporting seat 704 are driven to be in threaded engagement, the movable pin 703 is driven to move upwards and is attached to the fixed pin 702, a clamping state is formed, and the fixing operation is completed.
Claims (5)
1. The utility model provides a high stop gear for machining of stability, includes vertical sliding structure (1), its characterized in that: the device comprises two vertical sliding structures (1), wherein the upper surfaces of the two vertical sliding structures (1) are movably connected with a transverse sliding structure (2), one end of each vertical sliding structure (1) is provided with a driving structure (3), the outer side of each transverse sliding structure (2) is movably connected with an external connecting structure (4), one side of one vertical sliding structure (1) is fixedly provided with a limiting frame (5), the inside of each limiting frame (5) is movably connected with a power transmission flat cable (6), and the outer side of each external connecting structure (4) is fixedly provided with a clamping structure (7);
the vertical sliding structure (1) comprises a vertical sliding frame (101), limiting inner grooves (102), folding plates A (103), connecting shafts (104), a driving shaft (105), limiting sliding pins (106) and fixing ends (107), wherein the limiting inner grooves (102) are symmetrically arranged on two sides of the inner wall of the vertical sliding frame (101), the folding plates A (103) are arranged inside the limiting inner grooves (102), every two folding plates A (103) are connected through the connecting shafts (104), the driving shaft (105) located at one end of a driving structure (3) is movably connected to the middle position inside the vertical sliding frame (101), the two limiting sliding pins (106) are symmetrically arranged on the bottom surface of the inner wall of the vertical sliding frame (101), the fixing ends (107) are arranged at one end of the folding plates A (103), and the external connecting structure (4) comprises an external support (401), The clamping device comprises a transmission pin (402), a transmission hole pin (403), a limiting sliding groove (404), inserting holes (405), an adjusting bolt (406), an adjusting shaft (407) and clamping pins (408), wherein the transmission pin (402) is arranged on the outer surface of one side of an external support (401), the transmission hole pin (403) is arranged inside the transmission pin (402), the limiting sliding groove (404) is arranged at each of the upper end and the lower end of the transmission pin (402), the two inserting holes (405) are symmetrically arranged on the outer surface of the other side of the external support (401), the adjusting bolt (406) is movably connected to each of the upper end and the lower end of the external support (401), the adjusting shaft (407) is arranged on the lower surface of the adjusting bolt (406), the clamping structure (7) comprises a fixed base (701), a fixed pin (702) and a moving pin (703), and the clamping structure comprises a fixed base (701), a fixed pin (703) and a clamping pin (702) and a clamping pin (703), The supporting device comprises a supporting base (704), a supporting screw rod (705), a hexagonal pin (706), fixed bolts (707) and a locking groove (708), wherein a fixed pin (702) is arranged on the outer side of the upper surface of the fixed base (701), a movable pin (703) which is arranged on the outer side of the fixed base (701) is movably connected to the lower end of the fixed pin (702), the supporting screw rod (705) is movably connected to the lower surface of the movable pin (703), the supporting base (704) is arranged on the outer surface of the lower end of the fixed base (701), the hexagonal pin (706) is arranged at the lower end of the supporting screw rod (705), two fixed bolts (707) are symmetrically arranged on the outer surface of the other side of the fixed base (701), and the locking groove (708) is arranged on the outer surfaces of the two fixed bolts (707); the transverse sliding structure (2) comprises a transverse sliding frame (201), a folding plate B (202), a connecting base (203), a sliding pin base (204), a matching bottom groove (205), a threaded hole (206), an inserting end (207) and a positioning hole groove (208), a folding plate B (202) is arranged on the outer surface of one side of the transverse sliding frame (201), the structure of the folding plate B (202) is consistent with that of the folding plate A (103), the lower surfaces of two ends of the transverse sliding frame (201) are fixedly provided with connecting bases (203), a sliding pin seat (204) is fixedly arranged on the lower surface of the connecting base (203), the lower surface of the sliding pin seat (204) is symmetrically provided with matching bottom grooves (205), a threaded hole (206) is formed in the sliding pin seat (204), an inserting end (207) is arranged on the upper surface of the sliding pin seat (204), and positioning hole grooves (208) are formed in the lower surfaces of the two connecting bases (203); the connecting shaft (104) is connected with the two folding plates A (103) through a shaft pin, and two ends of each connecting shaft (104) are provided with miniature rollers; the connecting shaft (104) and the limiting inner groove (102) are supported through a micro roller, and the limiting inner groove (102) is connected with the micro roller in a sliding mode.
2. The high-stability limiting mechanism for machining according to claim 1, characterized in that: one end of the transverse sliding structure (2) is provided with a driving structure (3), the inside of the transverse sliding frame (201) is provided with a driving shaft (105), the inside of the transverse sliding frame (201) is consistent with the inside structure of the vertical sliding frame (101), and the outer surface of one side of the external support (401) and the outer surface of one side of the transverse sliding frame (201) are driven by matching of a transmission hole pin (403) and the driving shaft (105).
3. The high-stability limiting mechanism for machining according to claim 1, characterized in that: two stiff end (107) all are connected with the both sides of connecting base (203), stiff end (107) pass through the draw-in groove with the surface of connecting base (203) both sides fixedly.
4. The high-stability limiting mechanism for machining according to claim 1, characterized in that: the driving structure (3) comprises a driving motor and a gear set, and the driving shaft (105) extends into the driving structure (3) and is in meshing transmission with the gear set through tooth grooves.
5. The high-stability limiting mechanism for machining according to claim 1, characterized in that: the external support (401) and the fixed base (701) are fixed through the matching of a fixed bolt (707) and the plug-in hole (405), and are reinforced through the matching of a clamping pin (408) and a locking groove (708).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031039.6A CN113459012B (en) | 2021-09-03 | 2021-09-03 | High stop gear for machining of stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031039.6A CN113459012B (en) | 2021-09-03 | 2021-09-03 | High stop gear for machining of stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113459012A CN113459012A (en) | 2021-10-01 |
| CN113459012B true CN113459012B (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111031039.6A Active CN113459012B (en) | 2021-09-03 | 2021-09-03 | High stop gear for machining of stability |
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| CN (1) | CN113459012B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178258B1 (en) * | 2000-08-01 | 2006-03-29 | P.E.I. Protezioni Elaborazioni Industriali S.r.l. | Protective cover able to be associated to a work organ movable at least in one plane |
| CN203765485U (en) * | 2014-03-12 | 2014-08-13 | 宁波市鄞州多凡国际贸易有限公司 | Bench clamp combining device |
| CN104148963A (en) * | 2014-08-08 | 2014-11-19 | 浙江纺织服装职业技术学院 | Bench vice with five degrees of freedom |
| CN206305995U (en) * | 2016-12-21 | 2017-07-07 | 四川航天职业技术学院 | It is a kind of can angle-adjustable vice |
| CN109048710B (en) * | 2018-08-08 | 2020-10-16 | 上海宇航系统工程研究所 | Large-scale actuating mechanism precision assembly and adjustment frock |
| CN110026920B (en) * | 2019-04-09 | 2020-10-09 | 安徽凯贝耐特钣金科技有限公司 | Clamp for sheet metal workpiece machining and using method thereof |
| CN110976983A (en) * | 2019-11-21 | 2020-04-10 | 嘉兴嘉诚动能设备有限公司 | Steel plate edge milling machine |
| CN213318838U (en) * | 2020-09-22 | 2021-06-01 | 阿尔伯特(苏州)科技有限责任公司 | Double-drive gantry motion platform |
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2021
- 2021-09-03 CN CN202111031039.6A patent/CN113459012B/en active Active
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