CN209754024U - Roller coaxial double-end-face automatic leveling device - Google Patents

Roller coaxial double-end-face automatic leveling device Download PDF

Info

Publication number
CN209754024U
CN209754024U CN201920168724.5U CN201920168724U CN209754024U CN 209754024 U CN209754024 U CN 209754024U CN 201920168724 U CN201920168724 U CN 201920168724U CN 209754024 U CN209754024 U CN 209754024U
Authority
CN
China
Prior art keywords
roller
longitudinal
transverse
sliding device
longitudinal 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.)
Active
Application number
CN201920168724.5U
Other languages
Chinese (zh)
Inventor
杨春辉
刘祥
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.)
ZHONGSHAN DONGYUN PLATEMAKING Co Ltd
Original Assignee
ZHONGSHAN DONGYUN PLATEMAKING 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 ZHONGSHAN DONGYUN PLATEMAKING Co Ltd filed Critical ZHONGSHAN DONGYUN PLATEMAKING Co Ltd
Priority to CN201920168724.5U priority Critical patent/CN209754024U/en
Application granted granted Critical
Publication of CN209754024U publication Critical patent/CN209754024U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Nonmetal Cutting Devices (AREA)

Abstract

The utility model discloses a coaxial two terminal surfaces of roller car is flat device, including rack platform, first lateral sliding device, second lateral sliding device, first longitudinal sliding device, second longitudinal sliding device, first cutting tool and second cutting tool. Wherein, the frame stand is provided with an inclined working table; the first transverse sliding device, the second transverse sliding device, the first longitudinal sliding device, the second longitudinal sliding device, the first cutting tool and the second cutting tool are all positioned on the inclined working table; the first cutting tool and the second cutting tool can clamp the left and right of the rolling device and move back and forth relative to the roller to align the two ends of the rolled roller simultaneously through the driving of the first transverse sliding device and the second transverse sliding device and the driving of the first longitudinal sliding device and the second longitudinal sliding device respectively. The coaxial double-end-face automatic leveling device for the roller can cut and level the two ends of the roller simultaneously, is high in working efficiency and saves time.

Description

Roller coaxial double-end-face automatic leveling device
Technical Field
The utility model relates to a roller cutting machine especially relates to a coaxial bi-polar face automatic leveling device of roller.
Background
In the production of roller, to the terminal surface cutting of roller, the tradition generally adopts artifical cutting, generally adopts roller cutting machine to cut now, but adds man-hour at roller both ends face, and every terminal surface of processing roller all needs the repeated work of retreating sword, turn-over, counterpoint and feed, and work efficiency is low to waste time is unfavorable for production.
SUMMERY OF THE UTILITY MODEL
the utility model aims at overcoming prior art's problem, providing one kind can cut the both ends face of roller simultaneously, work efficiency is high, the coaxial bi-polar face automatic leveling device of roller of saving time.
In order to achieve the above purpose, the utility model adopts the following scheme:
A coaxial two terminal surface of a roller car paper-back edition is put, includes:
A gantry having an inclined work surface;
the roller clamping and rolling device is positioned in front of the middle position of the rack platform and is used for clamping the roller and driving the roller to roll;
The first transverse sliding device and the second transverse sliding device are arranged on the inclined working table surface and are respectively positioned at two sides of the roller clamping and rolling device;
the first longitudinal sliding device and the second longitudinal sliding device are respectively arranged on the first transverse sliding device and the second transverse sliding device;
the first cutting tool and the second cutting tool are respectively arranged on the first longitudinal sliding device and the second longitudinal sliding device;
The first cutting tool and the second cutting tool can clamp the left and right of the rolling device and move back and forth relative to the roller to align the two ends of the rolled roller simultaneously through the driving of the first transverse sliding device and the second transverse sliding device and the driving of the first longitudinal sliding device and the second longitudinal sliding device respectively.
Furthermore, the roller clamping and rolling device comprises a shell, a rolling device positioned in the shell, a chuck mechanism positioned on the rolling device and used for clamping the roller, and an operation door hinged with the shell; the rolling device drives the chuck mechanism to roll.
Further, the shell is provided with a through hole which penetrates through two sides of the shell and is used for the roller to penetrate through; the rolling device comprises:
a rotating electric machine provided in the housing;
a main gear connected to an output shaft of the rotating electrical machine;
a connecting cylinder having one end connected to the housing; the connecting cylinder is provided with a cylinder cavity which is communicated with the through opening and is used for the roller to pass through;
The driven gear is meshed with the main gear; one end of the driven gear is connected with the other end of the connecting cylinder through a bearing; the rotary motor drives the driven gear to roll on the connecting cylinder;
The chuck mechanism is arranged on the end face of the other end of the driven gear and corresponds to the position of the through hole, and the chuck mechanism is communicated with the through hole and rolls on the connecting cylinder along with the driven gear.
furthermore, waste collecting boxes which are positioned in front of the rack and used for collecting cutting waste are arranged on two sides of the roller clamping and rolling device.
further, the first lateral sliding means and the second lateral sliding means each comprise:
the transverse guide rail is arranged on the inclined working table surface;
The transverse sliding seat is correspondingly matched and connected with the transverse guide rail; the first longitudinal sliding device and the second longitudinal sliding device are correspondingly arranged on the transverse sliding seat;
And the transverse driving device is correspondingly arranged at one end of the transverse guide rail and drives the transverse sliding seat to move left and right in a reciprocating manner along the transverse guide rail relative to the roller clamping and rolling device.
Further, a waste material sliding lower chain plate located on one side of the first longitudinal sliding device is connected to the transverse sliding base in a hanging mode.
Further, the first longitudinal sliding means and the second longitudinal sliding means each comprise:
the longitudinal guide rail is correspondingly arranged on the first transverse sliding device and the second transverse sliding device;
The longitudinal sliding seat is correspondingly matched and connected with the longitudinal guide rail; the first cutting tool and the second cutting tool are correspondingly arranged on the longitudinal sliding seat;
and the longitudinal driving device is correspondingly arranged at one end of the longitudinal guide rail and drives the longitudinal sliding seat to clamp the rolling device along the longitudinal guide rail and move back and forth in a reciprocating manner.
further, the inclined angle of the inclined working table surface is 1-45 degrees.
Further, the inclined working platform surface is inclined at an angle of 30 degrees.
further, the roller clamping and rolling device also comprises an operation door hinged with the shell.
compared with the prior art, the utility model has the advantages of as follows:
1. The utility model discloses a coaxial two terminal surface automotive vehicle flat device of roller presss from both sides tight roll-over device through the roller and carries out the clamping to the roller to drive the roller and roll over, recycle first cutting tool and second cutting tool and through the drive of first lateral sliding device and second lateral sliding device and the drive of first longitudinal sliding device and second longitudinal sliding device roller press from both sides tight roll-over device's the left and right sides and back-and-forth movement counterpoint relatively, it is flat to cut the car simultaneously to the both ends face of the roller of roll over, high work efficiency, and high speed, save time, need not a large amount of manpowers, effectively reduce the cost, help roller production.
2. The utility model discloses a frame platform of the coaxial two terminal surface automotive vehicle flat device of roller has an inclined working table face, cuts the flat back of car simultaneously to the both ends face of the roller that rolls over, and the waste material of production helps the cleanness of station in dropping scrap collecting box easily, is convenient for clean.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a perspective view 1 of the operation door of the roller coaxial double-end-face automatic leveling device of the present invention in a closed state.
fig. 2 is a perspective view 2 of the operation door of the roller coaxial double-end-face automatic leveling device of the present invention in a closed state.
Fig. 3 is a perspective view of the operation door of the roller coaxial double-end-face automatic leveling device of the present invention in an open state.
fig. 4 is a perspective view of the rolling device of the roller coaxial double-end-face automatic leveling device of the present invention.
fig. 5 is a perspective view of the rolling device and chuck mechanism of the coaxial double-end-face automatic leveling device of the roller of the present invention.
Detailed Description
Referring to fig. 1 to 5, an automatic roller leveling device with coaxial double end faces comprises a frame 1, a roller clamping and rolling device 2, a first transverse sliding device 3, a second transverse sliding device 4, a first longitudinal sliding device 5, a second longitudinal sliding device 6, a first cutting tool 7, a second cutting tool 8 and a scrap collecting box 9. Wherein, the frame stand 1 is provided with an inclined working table surface 11; the roller clamping and rolling device 2 is positioned in front of the middle position of the rack 1 and is used for clamping a roller and driving the roller to roll; the first transverse sliding device 3 and the second transverse sliding device 4 are arranged on the inclined working platform surface 11 and are respectively positioned at two sides of the roller clamping and rolling device 2; the first longitudinal sliding device 5 and the second longitudinal sliding device 6 are respectively arranged on the first transverse sliding device 3 and the second transverse sliding device 4; the first transverse sliding device 3 and the second transverse sliding device 4 drive the first longitudinal sliding device 5 and the second longitudinal sliding device 6 to move left and right relative to the roller clamping rolling device 2; a first cutting tool 7 and a second cutting tool 8 are respectively arranged on the first longitudinal sliding device 5 and the second longitudinal sliding device 6; the first longitudinal sliding device 5 and the second longitudinal sliding device 6 drive the first cutting tool 7 and the second cutting tool 8 to move back and forth relative to the roller clamping and rolling device 2; the first cutting tool 7 and the second cutting tool 8 can clamp the left and right of the rolling device 2 and move back and forth relative to the roller to align the left and right of the roller and simultaneously cut and level the two ends of the rolled roller through the driving of the first transverse sliding device 3 and the second transverse sliding device 4 and the driving of the first longitudinal sliding device 5 and the second longitudinal sliding device 6 respectively. And waste collecting boxes 9 which are positioned in front of the rack platform 1 and used for collecting cutting waste are arranged on two sides of the roller clamping and rolling device 2. The roller is clamped by the roller clamping and rolling device 2, the roller is driven to roll, the first cutting tool 7 and the second cutting tool 8 can be used for clamping the roller 2 relatively to the roller through the driving of the first transverse sliding device 3 and the second transverse sliding device 4 and the driving of the first longitudinal sliding device 5 and the second longitudinal sliding device 6, the left and right sides and the front and back movement alignment can be realized, the cutting and leveling are simultaneously carried out on the two end faces of the roller to be rolled, the working efficiency is high, the speed is high, the time is saved, a large amount of manpower is not needed, the cost is effectively reduced, and the roller production is facilitated. Meanwhile, the machine frame 1 is provided with an inclined working table surface 11, and after the two end surfaces of the rolling roller are cut and leveled simultaneously, the generated waste materials easily fall into the waste material collecting box 9, so that the cleaning of the working position is facilitated, and the cleaning is convenient.
The inclined angle of the inclined working platform surface 11 is 1-45 degrees. In this embodiment, the inclined work surface 11 is preferably inclined at an angle of 30 °. Through the angle of inclination that sets up slope table surface 11 rationally, make the waste material of production drop easily in waste material collecting box 9, help the cleanness of station, be convenient for clean.
the roller clamping and rolling device 2 comprises a shell 21, a rolling device 22 positioned in the shell 21, a chuck mechanism 23 positioned on the rolling device 22 and used for clamping the roller, and an operation door 24 hinged with the shell 21; the rolling device 22 drives the chuck mechanism 23 to roll. Through passing the roller and pressing from both sides tight roll-over device 2 of roller, open operating door 24, through manual operation, make chuck mechanism 23 chucking roller, utilize roll-over device 22 drive chuck mechanism 23 to roll over next, and drive the roller and roll over, then utilize first cutting tool 7 and second cutting tool 8 to cut the car flat simultaneously to the both ends of the roller of rolling over, work efficiency is high, and is fast, saves time, need not a large amount of manpowers, effectively reduces the cost, helps roller production.
Preferably, the housing 21 has a through opening 211 passing through both sides thereof for passing the roller therethrough. The rolling device 22 includes a rotating motor 221, a main gear 222, a connecting cylinder 223, and a driven gear 224. Wherein, the rotating electrical machine 221 is arranged in the housing 21; a main gear 222 is connected to an output shaft of the rotating motor 221; a connecting cylinder 223 having one end connected to the housing 21; the connecting cylinder 223 is provided with a cylinder cavity 2231 which is communicated with the through hole 211 and is used for the roller to pass through; a driven gear 224 is meshed with the main gear 222; one end of the driven gear 224 is connected with the other end of the connecting cylinder 223 through a bearing 2241; the rotating motor 221 drives the driven gear 224 to roll on the connecting cylinder 223; the chuck mechanism 23 is provided on the end surface of the other end of the driven gear 224 and is communicated with the through hole 211, and rolls on the connecting cylinder 223 in synchronization with the driven gear 224. After the roller is clamped by the chuck mechanism 23, the main gear 222 is driven by the rotating motor 221 to drive the driven gear 224 to roll on the connecting cylinder 223 to drive the roller to roll, then the first cutting tool 7 and the second cutting tool 8 are used for cutting and leveling the two end faces of the rolled roller simultaneously, the working efficiency is high, the speed is high, the time is saved, a large amount of manpower is not needed, the cost is effectively reduced, and the roller production is facilitated.
in order to improve the efficiency, save the time and realize the simultaneous cutting and leveling of the two end surfaces of the roller, a first transverse sliding device 3 and a second transverse sliding device 4 are arranged on the two sides of the roller clamping and rolling device 2 for moving and aligning in the left and right directions. Wherein the first lateral slide 3 and the second lateral slide 4 each comprise a lateral guide rail 31, 41, a lateral slide 32, 42 and a lateral drive 33, 43. Wherein, the transverse guide rails 31, 41 are arranged on the inclined working platform surface 11; the transverse sliding seats 32, 42 are correspondingly matched and connected with the transverse guide rails 31, 41; the first longitudinal sliding device and the second longitudinal sliding device are correspondingly arranged on the transverse sliding seat; the transverse driving devices 33 and 43 are correspondingly arranged at one ends of the transverse guide rails 31 and 41 and drive the transverse sliding seats 32 and 42 to reciprocate left and right along the transverse guide rails 31 and 41 relative to the roller clamping and rolling device 2.
Preferably, a scrap slide down link 10 is suspended from the transverse slide 32 on one side of the first longitudinal slide 5. The scrap slide down link plate 10 on one side of the first longitudinal slide 6 is also suspended from the transverse slide 32. Likewise, the scrap slide lower link plate 10 on one side of the first longitudinal slide 6 is also suspended from the transverse slide 42. This waste material slides down link joint 10 downwardly extending to in the garbage collection box 9, consequently, behind the cutting car plain drum, the waste material of production easily slides down to the garbage collection box 9 in from the waste material slides down link joint 10, avoids the waste material to amass on horizontal slide 32 or horizontal slide 42, is unfavorable for the equipment cleanness and pleasing to the eye, increases staff's cleaning work.
in order to improve the efficiency, save the time and realize the simultaneous cutting and leveling of the two end surfaces of the roller, a first longitudinal sliding device 5 and a second longitudinal sliding device 6 are arranged on the two sides of the roller clamping and rolling device 2 for the movement alignment in the front-back direction. Wherein the first longitudinal slide 5 and the second longitudinal slide 6 each comprise a longitudinal guide 51, 61, a longitudinal slide 52, 62 and a longitudinal drive 53, 63. The longitudinal guide rails 51 and 61 are correspondingly arranged on the first transverse sliding device 3 and the second transverse sliding device 4; the longitudinal sliding seats 52 and 62 are correspondingly matched and connected with the longitudinal guide rails 51 and 61; the first cutting tool 7 and the second cutting tool 8 are correspondingly arranged on the longitudinal sliding seats 52 and 62; the longitudinal driving devices 53 and 63 are correspondingly arranged at one ends of the longitudinal guide rails 51 and 61 and drive the longitudinal sliding seats 52 and 62 to reciprocate back and forth along the longitudinal guide rails 51 and 61 relative to the roller clamping and rolling device 2.
The utility model discloses a coaxial bi-polar face of roller is from dynamic vehicle flat device's theory of operation as follows:
firstly, the roller passes through the roller cavity 2231, the driven gear 224 and the chuck mechanism 23 from one side of the shell 21, goes out from the other side of the shell 21, opens the operation door 24, enables the chuck mechanism 23 to clamp the roller through manual operation, and then drives the chuck mechanism 23 to roll by using the rotating motor 221 and drives the roller to roll; then, the first cutting tool 7 and the second cutting tool 8 can clamp the left and right sides and front and back movement alignment of the rolling device 2 relative to the roller through the driving of the first transverse sliding device 3 and the second transverse sliding device 4 and the driving of the first longitudinal sliding device 5 and the second longitudinal sliding device 6, the two ends of the rolling roller are cut and leveled simultaneously, the double-sided cutting of the roller is achieved, the working efficiency is high, the speed is high, the time is saved, a large amount of manpower is not needed, the cost is effectively reduced, and the roller production is facilitated.
While the embodiments of the present application have been described in detail, the present application is not limited to the embodiments described above. Even if various changes are made in the present application, the protection scope of the present application is still included.

Claims (10)

1. The utility model provides a coaxial two terminal surfaces of roller car paper-back edition is put which characterized in that includes:
a frame stand (1) having an inclined work surface (11);
The roller clamping and rolling device (2) is positioned in front of the middle position of the rack (1) and is used for clamping the roller and driving the roller to roll;
the first transverse sliding device (3) and the second transverse sliding device (4) are arranged on the inclined working platform surface (11) and are respectively positioned at two sides of the roller clamping and rolling device (2);
a first longitudinal sliding device (5) and a second longitudinal sliding device (6) which are respectively arranged on the first transverse sliding device (3) and the second transverse sliding device (4);
A first cutting tool (7) and a second cutting tool (8) respectively provided on said first longitudinal sliding means (5) and on said second longitudinal sliding means (6);
The first cutting tool (7) and the second cutting tool (8) can clamp the rolling device (2) relative to the roller through the driving of the first transverse sliding device (3) and the second transverse sliding device (4) and the driving of the first longitudinal sliding device (5) and the second longitudinal sliding device (6) respectively, and the left and right and front and back movement alignment of the rolling device can be carried out, so that the two ends of the rolled roller can be cut, leveled simultaneously.
2. the roller coaxial double-end-face automatic leveling device according to claim 1, wherein the roller clamping and rolling device (2) comprises a housing (21), a rolling device (22) located in the housing (21), and a chuck mechanism (23) located on the rolling device (22) and used for clamping the roller; the rolling device (22) drives the chuck mechanism (23) to roll.
3. the roller coaxial double-ended automatic leveling device according to claim 2, wherein said housing (21) has a through opening (211) passing through both sides thereof for passing the roller therethrough; the rolling device (22) comprises:
a rotating electric machine (221) provided in the housing (21);
A main gear (222) connected to an output shaft of the rotating motor (221);
A connecting cylinder (223) having one end connected to the housing (21); the connecting cylinder (223) is provided with a cylinder cavity (2231) which is communicated with the through hole (211) and is used for the roller to pass through;
A driven gear (224) in meshed connection with the main gear (222); one end of the driven gear (224) is connected with the other end of the connecting cylinder (223) through a bearing (2241); the rotating motor (221) drives the driven gear (224) to roll on the connecting cylinder (223);
the chuck mechanism (23) is arranged on the end face of the other end of the driven gear (224), is communicated with the through hole (211) in a position corresponding to the through hole, and synchronously rolls on the connecting cylinder (223) along with the driven gear (224).
4. The roller coaxial double-ended automatic leveling device according to claim 1, characterized in that both sides of the roller clamping and rolling device (2) are provided with scrap collecting boxes (9) located in front of the frame (1) and used for collecting cutting scraps.
5. Roller coaxial double-ended automatic levelling device according to claim 4, characterized in that said first lateral sliding means (3) and second lateral sliding means (4) each comprise:
transverse guide rails (31, 41) provided on the inclined work surface (11);
The transverse sliding seats (32, 42) are correspondingly matched and connected with the transverse guide rails (31, 41); the first longitudinal sliding device (5) and the second longitudinal sliding device (6) are correspondingly arranged on the transverse sliding seats (32, 42);
And the transverse driving devices (33, 43) are correspondingly arranged at one ends of the transverse guide rails (31, 41) and drive the transverse sliding seats (32, 42) to reciprocate left and right relative to the roller clamping and rolling device (2) along the transverse guide rails (31, 41).
6. roller coaxial double-ended automatic levelling apparatus according to claim 5, characterized in that a scrap slide down link (10) located on one side of the first longitudinal slide (5) is suspended on the transverse slide (32).
7. roller coaxial double-ended automatic levelling device according to claim 1, characterized in that the first longitudinal sliding means (5) and the second longitudinal sliding means (6) each comprise:
longitudinal guide rails (51, 61) which are correspondingly arranged on the first transverse sliding device (3) and the second transverse sliding device (4);
Longitudinal sliding seats (52, 62) which are correspondingly matched and connected with the longitudinal guide rails (51, 61); the first cutting tool (7) and the second cutting tool (8) are correspondingly arranged on the longitudinal sliding seats (52, 62);
and the longitudinal driving devices (53, 63) are correspondingly arranged at one ends of the longitudinal guide rails (51, 61) and drive the longitudinal sliding seats (52, 62) to reciprocate back and forth along the longitudinal guide rails (51, 61) relative to the roller clamping and rolling device (2).
8. roller coaxial double-ended automatic leveling device according to claim 1, wherein the inclined working table (11) is inclined at an angle of 1 ° to 45 °.
9. Roller coaxial double-ended automatic leveling device according to claim 8, characterized in that the inclined work surface (11) is inclined at an angle of 30 °.
10. The roller coaxial double-ended automatic leveling device according to claim 2, wherein said roller clamping and rolling device (2) further comprises an operating door (24) hinged to said housing (21).
CN201920168724.5U 2019-01-29 2019-01-29 Roller coaxial double-end-face automatic leveling device Active CN209754024U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920168724.5U CN209754024U (en) 2019-01-29 2019-01-29 Roller coaxial double-end-face automatic leveling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920168724.5U CN209754024U (en) 2019-01-29 2019-01-29 Roller coaxial double-end-face automatic leveling device

Publications (1)

Publication Number Publication Date
CN209754024U true CN209754024U (en) 2019-12-10

Family

ID=68751196

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920168724.5U Active CN209754024U (en) 2019-01-29 2019-01-29 Roller coaxial double-end-face automatic leveling device

Country Status (1)

Country Link
CN (1) CN209754024U (en)

Similar Documents

Publication Publication Date Title
CN109338602B (en) Full-automatic four-side sewing machine
CN210280890U (en) Sawing machine capable of performing 45-degree sawing on pipeline
CN109834466B (en) Automatic blanking, cutting and edging integrated machine and use method thereof
CN110757934B (en) Building templates hot pressing blowing and blevile of push
CN111715785A (en) Full-automatic production line for stamping and shearing metal plates and use method
CN114030233A (en) Manufacturing and processing machine and method for medical antibacterial composite bag
CN209754024U (en) Roller coaxial double-end-face automatic leveling device
CN206718060U (en) New both-end numerical control tenon milling machine
CN215699630U (en) Plate gong production line
CN215699829U (en) Workbench for cutting sheet material and sheet material cutting machine
CN213826803U (en) Cutting machine for power cable processing
CN112402929A (en) Basketball leather cutting system convenient for collecting waste materials
CN108933373B (en) Continuous processing equipment for commutator segment for commutator
CN201880989U (en) Milling machine with improved structure
CN219403391U (en) Aluminum product cutting equipment
CN214977378U (en) Construction steel bar cuts device
CN206032624U (en) Lamp strip charge palte unit
CN110861967B (en) Material feeding and folding device in material belt breaking machine
CN214026038U (en) Punching equipment for automobile interior trimming panel
CN214981637U (en) Numerical control extremely simple double-end saw
CN211627403U (en) Battery pole piece slitting burr detection device
CN212885308U (en) Plate shearing machine for machining automobile parts
CN220347823U (en) Machine tool material arranging equipment
CN212955892U (en) Equipment is tailor to cloth with garbage collection mechanism
CN220614324U (en) A high-efficient cutting device for plank

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant