CN110394712A - A kind of steel ball grinding device - Google Patents

A kind of steel ball grinding device Download PDF

Info

Publication number
CN110394712A
CN110394712A CN201910540129.4A CN201910540129A CN110394712A CN 110394712 A CN110394712 A CN 110394712A CN 201910540129 A CN201910540129 A CN 201910540129A CN 110394712 A CN110394712 A CN 110394712A
Authority
CN
China
Prior art keywords
turntable
steel ball
plate
grinding wheel
sliding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910540129.4A
Other languages
Chinese (zh)
Other versions
CN110394712B (en
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Juesheng Technology Co Ltd
Original Assignee
Ningbo Juesheng Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Juesheng Technology Co Ltd filed Critical Ningbo Juesheng Technology Co Ltd
Priority to CN201910540129.4A priority Critical patent/CN110394712B/en
Publication of CN110394712A publication Critical patent/CN110394712A/en
Application granted granted Critical
Publication of CN110394712B publication Critical patent/CN110394712B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B11/00Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
    • B24B11/02Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls
    • B24B11/04Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels
    • B24B11/08Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels acting by the circumference
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/02Frames; Beds; Carriages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00Drives or gearings; Equipment therefor
    • B24B47/10Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power

Abstract

The invention discloses a kind of steel ball grinding devices, including pedestal, the rear end of pedestal is equipped with back plate, side plate is symmetrically arranged at left and right sides of pedestal, the upper end of pedestal is rotatably provided with the first turntable between both side plate, and the center of the first turntable is equipped with the first arc groove, first turntable is equipped with the clamping mechanism matched with side plate, stepper motor is fixed on the upside of front edge of board afterwards, first rotating shaft is linked on the output shaft of stepper motor, the grinding wheel mechanism matched with side plate is connected in first rotating shaft.The present invention has the advantages that as long as being put into steel ball is automatically performed the remaining circle of polishing steel ball after the polishing of the circle of steel ball one, rotation steel ball, it is combined with lifting grinding wheel simultaneously, the polishing work of entire steel ball is completed, simple and fast, grinding homogeneity and effect are good, and can clear up waste residue.

Description

A kind of steel ball grinding device
Technical field
The present invention relates to a kind of grinding apparatus more particularly to a kind of steel ball grinding devices.
Background technique
Steel ball is divided into grinding steel ball, forged steel ball, steel ball casting according to production and processing technology.It is divided into axis according to rapidoprint Hold steel ball, stainless steel ball, carbon steel balls, copper bearing steel ball ball alloying pellet etc..Wherein bearing steel ball is the important foundation zero of industry Component, it is main addition metallic element that alloy steel ball, which is with carbon, chromium, manganese, molybdenum etc., and by forging, spinning, rolling and casting etc. A kind of spherical shape ferroalloy wear body that mode generates.Steel ball during processing, need using special equipment to its into Row polishing, to reach the best use effect of steel ball.And the outer surface of steel ball is rounded, polishing steel ball can not be accomplished simple fast Victory, uniform and effect are good
So needing a kind of steel ball grinding device, it is automatically performed the polishing of the circle of steel ball one as long as being put into steel ball, turns The remaining circle of polishing steel ball after dynamic steel ball, while it being combined with lifting grinding wheel, the polishing work of entire steel ball is completed, it is simple fast Prompt, grinding homogeneity and effect are good.
Summary of the invention
The main purpose of the present invention is to provide a kind of steel ball grinding devices, as long as being put into steel ball is automatically performed steel The polishing of the circle of ball one rotates the remaining circle of polishing steel ball after steel ball, while being combined with lifting grinding wheel, completes beating for entire steel ball Grinder is made, and simple and fast, grinding homogeneity and effect are good.
To achieve the above objectives, the technical solution adopted by the present invention are as follows: a kind of steel ball grinding device, including pedestal, it is described The rear end of pedestal is equipped with back plate, is symmetrically arranged with side plate at left and right sides of the pedestal, the upper end of the pedestal is rotatably provided with The first turntable between two side plates, the center of first turntable are equipped with the first arc groove, on first turntable Equipped with the clamping mechanism matched with the side plate, stepper motor, the stepper motor are fixed on the upside of the rear front edge of board Output shaft on be linked with first rotating shaft, the grinding wheel mechanism matched with the side plate is connected in the first rotating shaft, it is described First turntable, the back plate are equipped with the rotating mechanism connecting with the first rotating shaft.
Further, the grinding wheel mechanism includes the cam for being connected to the first rotating shaft front end, the inside of the side plate It is equipped with first sliding groove, the first sliding block is equipped in the first sliding groove in left side, is equipped in the first sliding groove on right side Second sliding block is equipped with spring between first sliding block, second sliding block and the first sliding groove, second sliding block Left end is fixed with grinding wheel motor, and grinding wheel spindle is linked on the output shaft of the grinding wheel motor, is linked with grinding wheel on the grinding wheel spindle, The right end of first sliding block is equipped with bearing, and the left end of the grinding wheel spindle is connected on the inner ring of the bearing, and described first is sliding Connector, the work face contact of the upper surface of the connector and the cam are connected between block and the grinding wheel motor.
Further, the clamping mechanism includes circumferential four second sliding slots for being evenly arranged on first turntable upper end, institute The outside for stating second sliding slot is equipped with skewback slot, and limited block is equipped in the second sliding slot, and shown limited block and described second are slided Second spring is connected between slot, the inside of the limited block is equipped with the second arc groove, and the outside of the limited block lower end is fixed There is skewback of the slide fit in the skewback slot, the skewback is matched with the side plate.
Further, the rotating mechanism includes the second shaft for being rotationally located at the back plate lower end, and described second turn It is linked with the second turntable on axis, is equipped with transmission gear, two transmission gears in second shaft and the first rotating shaft Between be connected with rubber toothed belt, the front end of second turntable, first turntable upper end be circumferentially evenly equipped with driving column, The driving column of second turntable can drive first turntable to rotate by the driving column of first turntable.
Further, the center of first turntable, the pedestal is equipped with mud hole.
Further, it is fixed with firm block on the upside of the rear front edge of board, the first rotating shaft is threaded through the firm block On.
As long as the present invention has the advantages that be put into steel ball be automatically performed steel ball one circle polishing, rotation steel ball after The remaining circle of steel ball of polishing, while it being combined with lifting grinding wheel, the polishing work of entire steel ball is completed, simple and fast, polishing is Even and effect is good, and can clear up waste residue.
Detailed description of the invention
Fig. 1 is top view according to the present invention;
Fig. 2 is perspective view when grinding wheel according to the present invention drops to bottom;
Fig. 3 is structural schematic diagram when grinding wheel according to the present invention drops to bottom;
Fig. 4 is main view when grinding wheel according to the present invention drops to bottom;
Fig. 5 is top view when grinding wheel according to the present invention drops to bottom;
Fig. 6 is the A-A cross-sectional view of Fig. 1;
Fig. 7 is the B-B cross-sectional view of Fig. 4;
Fig. 8 is the C-C cross-sectional view of Fig. 5;
Fig. 9 is the structural schematic diagram of embodiment according to the present invention 2;
Figure 10 is the cross-sectional view of embodiment according to the present invention 2.
Specific embodiment
It is described below for disclosing the present invention so that those skilled in the art can be realized the present invention.It is excellent in being described below Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
Embodiment 1:
As shown in Figures 1 to 8, the rear end of a kind of steel ball grinding device, including pedestal 1, pedestal 1 is equipped with back plate 2, pedestal 1 The left and right sides be symmetrically arranged with side plate 3, the upper end of pedestal 1 is rotatably provided with the first turntable 4 between both side plate 3, The center of one turntable 4 is equipped with the first arc groove, and the first turntable 4 is equipped with the clamping mechanism matched with side plate 3,2 front end of back plate Upside be fixed with stepper motor 12, first rotating shaft 11 is linked on the output shaft of stepper motor 12, is connected in first rotating shaft 11 There is the grinding wheel mechanism matched with side plate 3, the first turntable 4, back plate 2 are equipped with the rotating mechanism connecting with first rotating shaft 11.
Grinding wheel mechanism includes the cam 10 for being connected to 11 front end of first rotating shaft, and the inside of side plate 3 is equipped with first sliding groove 19, It is equipped with the first sliding block 7 in the first sliding groove 19 in left side, the second sliding block 8, the first sliding block are equipped in the first sliding groove 19 on right side 7, spring is equipped between the second sliding block 8 and first sliding groove 19, the left end of the second sliding block 8 is fixed with grinding wheel motor 5, grinding wheel motor It is linked with grinding wheel spindle on 5 output shaft, grinding wheel 6 is linked on grinding wheel spindle, the right end of the first sliding block 7 is equipped with bearing, grinding wheel spindle Left end is connected on the inner ring of bearing, and connector 9, the upper surface of connector 9 are connected between the first sliding block 7 and grinding wheel motor 5 With the work face contact of cam 10.
Clamping mechanism includes circumferential four second sliding slots for being evenly arranged on 4 upper end of the first turntable, and the outside of second sliding slot is equipped with Skewback slot is equipped with limited block 16 in second sliding slot, second spring, limited block 16 is connected between limited block 16 and second sliding slot Inside be equipped with the second arc groove, be fixed with skewback 17 of the slide fit in skewback slot on the outside of 16 lower end of limited block, skewback 17 with Side plate 3 matches.
Rotating mechanism includes the second shaft for being rotationally located at 2 lower end of back plate, and the second turntable 15 is linked in the second shaft, It is equipped with transmission gear in second shaft and first rotating shaft 11, is connected with rubber toothed belt 14 between two transmission gears, second turn The front end of disk 15, the first turntable 4 upper end be circumferentially evenly equipped with driving column 18, the driving column 18 of the second turntable 15 can pass through first The driving column 18 of turntable 4 drives the rotation of the first turntable 4.
First turntable 4, pedestal 1 center be equipped with mud hole.
Firm block 13 is fixed on the upside of 2 front end of back plate, first rotating shaft 11 is threaded through on firm block 13.
Its working principle is that: need to polish steel ball when, steel ball is put on the first turntable, steel ball falls into the first arc groove Interior, as shown in Figure 1, opening stepper motor and grinding wheel motor, stepper motor closes after driving first rotating shaft to rotate counterclockwise 180 degree It closes, first rotating shaft drives the rotation of the second shaft by rubber toothed belt, and the second shaft drives the second turntable to rotate counterclockwise 180 The driving column of degree, the second turntable can drive the first turntable vertical view to rotate clockwise 45 degree, such as Fig. 2 by the driving column of the first turntable Shown, after skewback and side plane contact, skewback moves inward and retracts in the first turntable, and skewback drives the inside sidesway of limited block Dynamic, the second arc groove of limited block limits steel ball, while first rotating shaft band moving cam rotates 180 degree, cam driven connector It moves down, connector drives the first sliding block, grinding wheel motor, the second sliding block, grinding wheel to move down, and the first spring prevents the first sliding block, second Sliding block falls off after moving down into bottom with cam, polishes after grinding wheel contact steel ball steel ball, grinding wheel also will drive steel ball rotation, steel After the completion of a circle polishing among ball, stepper motor is opened, stepper motor drives first rotating shaft to rotate counterclockwise 180 degree, and first Shaft band moving cam rotates 180 degree, and the first sliding block, the second sliding block rise under the active force of the first spring keeps connector one direct Cam is touched, grinding wheel rising falls off steel ball, and first rotating shaft drives the rotation of the second shaft by rubber toothed belt, and the second shaft drives the Two turntables rotate counterclockwise 180 degree, and the driving column of the second turntable can drive the first turntable to overlook by the driving column of the first turntable 45 degree are rotated clockwise, the first driven by rotary disc steel ball rotates 45 degree, and then stepper motor drives first rotating shaft to rotate counterclockwise 180 It is closed after degree, the first driven by rotary disc steel ball is rotated further by 45 degree, and the circle that steel ball is not polished is against grinding wheel, while first rotating shaft drives Cam rotates 180 degree, and the first sliding block of cam driven, the second sliding block, grinding wheel move down, and grinding wheel moves down contact steel ball and steel ball of polishing, Grinding wheel also will drive steel ball rotation, complete the polishing work of entire steel ball, and then stepper motor drives first rotating shaft to turn counterclockwise It is closed after dynamic 180 degree, is returned to state shown in Fig. 1, the steel ball that staff completes polishing takes out, and puts the steel ball that do not polish into It may continue to polish.And the upper edge of mud hole can will be adsorbed on the cleaning waste slag for the steel ball surface polished, and from row Cinder hole discharge.
Embodiment 2:
The present embodiment is to be further improved on the basis of embodiment 1, as shown in figs. 9-10, specific structure are as follows: In The inside of second sliding slot is equipped with push slot 21, pushes and is connected with skewed slot 22 between slot 21 and mud hole, the inside of limited block 16 is set There is the movable push block 20 in push slot 21, during grinding wheel 6 polishes to steel ball, has waste residue and splash to the second cunning In slot, limited block 16 move inward simultaneously, the waste residue in second sliding slot can be pushed into push and slot 21 and passed through by push block 20 Skewed slot 22 slides into mud hole.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and Improvement is both fallen in the range of claimed invention.The present invention claims protection scope by appended claims and its Equivalent defines.

Claims (6)

1. a kind of steel ball grinding device, it is characterised in that: including pedestal (1), the rear end of the pedestal (1) is equipped with back plate (2), institute It states and is symmetrically arranged at left and right sides of pedestal (1) side plate (3), the upper end of the pedestal (1) is rotatably provided with positioned at two sides The first turntable (4) between plate (3), the center of first turntable (4) are equipped with the first arc groove, on first turntable (4) Equipped with the clamping mechanism matched with the side plate (3), stepper motor (12), institute are fixed on the upside of back plate (2) front end It states and is linked on the output shaft of stepper motor (12) first rotating shaft (11), is connected with and the side plate on the first rotating shaft (11) (3) the grinding wheel mechanism matched, first turntable (4), the back plate (2) are equipped with and connect with the first rotating shaft (11) Rotating mechanism.
2. a kind of steel ball grinding device as described in claim 1, it is characterised in that: the grinding wheel mechanism is described including being connected to The cam (10) of first rotating shaft (11) front end is equipped with first sliding groove (19) on the inside of the side plate (3), described the first of left side It is equipped on sliding slot (19) the first sliding block (7), is equipped with the second sliding block (8) in the first sliding groove (19) on right side, described The first spring, second sliding block (8) are equipped between one sliding block (7), second sliding block (8) and the first sliding groove (19) Left end be fixed with grinding wheel motor (5), be linked with grinding wheel spindle, key on the grinding wheel spindle on the output shaft of the grinding wheel motor (5) It is connected to grinding wheel (6), the right end of first sliding block (7) is equipped with bearing, and the left end of the grinding wheel spindle is connected to the interior of the bearing It on circle, is connected between first sliding block (7) and the grinding wheel motor (5) connector (9), the upper end of the connector (9) The work face contact in face and the cam (10).
3. a kind of steel ball grinding device as described in claim 1, it is characterised in that: the clamping mechanism includes circumferential is evenly arranged on Four second sliding slots of the first turntable (4) upper end, the outside of the second sliding slot are equipped with skewback slot, in the second sliding slot It is equipped with limited block (16), second spring, the limited block is connected between shown limited block (16) and the second sliding slot (16) inside is equipped with the second arc groove, and it is oblique in the skewback slot to be fixed with slide fit on the outside of limited block (16) lower end Block (17), the skewback (17) match with the side plate (3).
4. a kind of steel ball grinding device as described in claim 1, it is characterised in that: the rotating mechanism includes rotationally being located at Second shaft of back plate (2) lower end is linked with the second turntable (15) in second shaft, second shaft with it is described It is equipped with transmission gear in first rotating shaft (11), is connected between two transmission gears rubber toothed belt (14), described second The front end of turntable (15), first turntable (4) upper end be circumferentially evenly equipped with driving column (18), second turntable (15) The driving column (18) can drive first turntable (4) to rotate by the driving column (18) of first turntable (4).
5. a kind of steel ball grinding device as described in claim 1-4 is any, it is characterised in that: first turntable (4), described The center of pedestal (1) is equipped with mud hole.
6. a kind of steel ball grinding device as claimed in claim 5, it is characterised in that: the upside of back plate (2) front end is fixed Have firm block (13), the first rotating shaft (11) is threaded through on the firm block (13).
CN201910540129.4A 2019-06-21 2019-06-21 Steel ball grinding device Active CN110394712B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910540129.4A CN110394712B (en) 2019-06-21 2019-06-21 Steel ball grinding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910540129.4A CN110394712B (en) 2019-06-21 2019-06-21 Steel ball grinding device

Publications (2)

Publication Number Publication Date
CN110394712A true CN110394712A (en) 2019-11-01
CN110394712B CN110394712B (en) 2021-03-26

Family

ID=68323318

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910540129.4A Active CN110394712B (en) 2019-06-21 2019-06-21 Steel ball grinding device

Country Status (1)

Country Link
CN (1) CN110394712B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112091800A (en) * 2020-09-30 2020-12-18 天津职业技术师范大学(中国职业培训指导教师进修中心) Spherical surface polishing equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6129611A (en) * 1998-05-28 2000-10-10 Bridgestone Sports Co., Ltd Golf ball buffing apparatus and method
CN101370620A (en) * 2006-02-10 2009-02-18 沈相培 Bowling ball surface treatment device
CN202763652U (en) * 2012-09-04 2013-03-06 北京青锋达精密技术有限责任公司 Numerical control (NC) spherical pair grinding machine
CN107363675A (en) * 2017-08-28 2017-11-21 安徽奥丰汽车配件有限公司 A kind of sanding apparatus of bulb
CN109531403A (en) * 2018-12-14 2019-03-29 厦门大学 The accurate grinding and polishing device of sphere
CN109877672A (en) * 2019-03-18 2019-06-14 扬州海地光电科技有限公司 A kind of Production of bearing automatic pressure-regulating type ball crusher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6129611A (en) * 1998-05-28 2000-10-10 Bridgestone Sports Co., Ltd Golf ball buffing apparatus and method
CN101370620A (en) * 2006-02-10 2009-02-18 沈相培 Bowling ball surface treatment device
CN202763652U (en) * 2012-09-04 2013-03-06 北京青锋达精密技术有限责任公司 Numerical control (NC) spherical pair grinding machine
CN107363675A (en) * 2017-08-28 2017-11-21 安徽奥丰汽车配件有限公司 A kind of sanding apparatus of bulb
CN109531403A (en) * 2018-12-14 2019-03-29 厦门大学 The accurate grinding and polishing device of sphere
CN109877672A (en) * 2019-03-18 2019-06-14 扬州海地光电科技有限公司 A kind of Production of bearing automatic pressure-regulating type ball crusher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112091800A (en) * 2020-09-30 2020-12-18 天津职业技术师范大学(中国职业培训指导教师进修中心) Spherical surface polishing equipment

Also Published As

Publication number Publication date
CN110394712B (en) 2021-03-26

Similar Documents

Publication Publication Date Title
CN110394712A (en) A kind of steel ball grinding device
CN209717238U (en) Automatically grinding device
CN111745512A (en) Inner and outer ring rough grinding device for bearing
CN109366297A (en) A kind of auto parts and components processing grinding device of adjustable-angle
CN208005349U (en) A kind of rotating device of Domestic glass edge polisher
CN108908071B (en) A kind of cold-rolled steel sheet polissoir for high-end equipment manufacturing
CN208195162U (en) A kind of specific gravity bottle cleaning device
CN206084623U (en) Pipeline mouth inner wall chain formula triangle polisher
CN206732738U (en) Sanding apparatus for bull metalwork intelligence grinder for polishing
CN108393761B (en) A kind of deburring of brake disc, grinding device
CN206869699U (en) A kind of inner circle burnishing device of casting set
CN108857794B (en) A kind of high-end equipment manufacturing cold-rolled steel sheet polydisc burnishing device
CN210281882U (en) Turntable driving mechanism of polishing machine
CN209394472U (en) A kind of quick grinding device of bearing ball
CN209190541U (en) A kind of centrifugal peener
CN208629205U (en) A kind of conducting block twin grinder
CN207206150U (en) Wafer grinding machine with freeing wheel
CN109318084A (en) A kind of handware surface quality process of refinement equipment
CN108942612A (en) A kind of efficient saw blade burnishing device
CN208663401U (en) Sanding and polishing equipment is used in a kind of production of furniture of steel and wood
CN108838768A (en) A kind of grinding device for auto parts and components production and processing
CN106584261A (en) Workpiece polishing machine
CN210650085U (en) Polishing machine
CN208051656U (en) Has the magnetic grinder of multi-cavity linkage
CN207415099U (en) A kind of compound four sides mill grinding head of five-shaft numerical control rubbing down lathe

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant