CN220810916U - Compatible many varieties tractor box positioner - Google Patents

Compatible many varieties tractor box positioner Download PDF

Info

Publication number
CN220810916U
CN220810916U CN202322768497.9U CN202322768497U CN220810916U CN 220810916 U CN220810916 U CN 220810916U CN 202322768497 U CN202322768497 U CN 202322768497U CN 220810916 U CN220810916 U CN 220810916U
Authority
CN
China
Prior art keywords
positioning
limiting
support plate
tractor
positioning support
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
CN202322768497.9U
Other languages
Chinese (zh)
Inventor
白俊杰
郭振杰
陈智辉
刘红霞
王保辉
李晨硕
陈艳萍
李金玲
董宇杰
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.)
First Tractor Co Ltd
Original Assignee
First Tractor 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 First Tractor Co Ltd filed Critical First Tractor Co Ltd
Priority to CN202322768497.9U priority Critical patent/CN220810916U/en
Application granted granted Critical
Publication of CN220810916U publication Critical patent/CN220810916U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a positioning device compatible with various tractor cases, which comprises a bottom plate and a track arranged on the bottom plate, wherein a first positioning support plate, a second positioning support plate, a window limiting mechanism and a third positioning support plate are sequentially arranged on the track from left to right along the length direction; the outer side of the track is provided with a first limiting guide rail and a second limiting guide rail respectively between the first positioning support plate and the second positioning support plate and at one side of the second positioning support plate close to the window limiting mechanism, and a front end positioning mechanism is arranged at one side of the third positioning support plate close to the window limiting mechanism. According to the utility model, through reasonably arranging the limiting and positioning devices, compatible bearing of two types of tractor box parts is realized, two different box parts can be conveyed, and when the box parts randomly reach the truss blanking level, part positioning distinction is not needed to be considered, so that indiscriminate conveying blanking is realized.

Description

Compatible many varieties tractor box positioner
Technical Field
The utility model belongs to the field of positioning of machining parts, relates to a blanking positioning device for a machining truss, and particularly relates to a blanking positioning device compatible with various tractor cases.
Background
With the rapid development of the agricultural machinery industry, the market share of large-scale wheel-mounted products is also greatly improved. In order to meet the market demands, the updating period of the wheel-trailing products is faster and faster, and in order to meet the individual demands of users, the types of the products are more and more diversified. The production modes such as the prior market situation, universality, flexibility, small investment and large return are not suitable for the prior large-scale investment and mass production due to the acceleration of product update, and the mechanical processing technical field is influenced.
The truss automatic line of the machining center is used as main equipment for producing the tractor box body, the automation degree of the whole line is high, the advantages of high efficiency and high consistency of part machining are fully reflected, the truss automatic line is used for single-variety production, the equipment load is high, but the flexibility of the whole line is poor, the workbench of truss line equipment is configured, the truss manipulator, the clamp and the cutter are all specially configured for the transmission box shell, other box parts cannot be machined, when the market demand of products on the line is reduced, the utilization rate of the equipment is reduced, the idle rate of the whole line is increased, and meanwhile, the truss line produced singly cannot provide production capacity for other dominant products.
But the truss transfer machine of many varieties production carries out the material loading according to variety part production demand proportion when processing different specification box parts, but in the course of working, receive the processing beat of different box parts, truss tongs snatch the order, truss program flow prescribes, equipment and frock trouble, manual debugging, the influence of various factors such as lathe delay wait, when processing the finished box part of having processed, can not carry out the unloading according to original material loading order, lead to the part that the unloading station received to be random specification part, cause unloading station material conveyor to carry out the design of single variety and install according to material loading station order and discharge.
Therefore, a positioning device which is suitable for large-specification tractor box bodies, is compatible with different types of tractor box body parts at a girder automatic line unloading station and can realize indiscriminate conveying and unloading is needed.
Disclosure of utility model
In view of the above, the present utility model aims to provide a positioning device compatible with various tractor cases, which can carry different specifications of tractor case parts, and can convey two different case parts, and when the case parts reach the truss blanking level randomly, the positioning difference of the parts is not needed to be considered, so as to realize indiscriminate conveying and blanking.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
The positioning device comprises a bottom plate and a track arranged on the bottom plate, wherein a first positioning support plate, a second positioning support plate, a window limiting mechanism and a third positioning plate are sequentially arranged on the track from left to right along the length direction; the outer side of the track is arranged between the first positioning support plate and the second positioning support plate, a first limiting guide rail and a second limiting guide rail are respectively arranged on one side, close to the window limiting mechanism, of the second positioning support plate, and a front end positioning mechanism is arranged on one side, close to the window limiting mechanism, of the third positioning plate;
The first positioning support plate, the first limiting guide rail, the window limiting mechanism, the front end positioning mechanism and the third positioning plate form a limiting mechanism for limiting and supporting the tractor box part A;
The second positioning support plate, the second limiting guide rail, the window limiting mechanism, the front end positioning mechanism and the third positioning plate form a limiting mechanism for limiting and supporting the tractor box body part B.
Further, the window limiting mechanism comprises a bearing table with a sliding groove at the bottom end and a plurality of window positioning plates arranged on the bearing table, and the window positioning plates are used for limiting windows on the box body parts.
Further, the window limiting mechanism is slidably arranged on the track and detachably mounted with the track.
Further, the first positioning support plate, the second positioning support plate and the third positioning plate are respectively provided with a supporting piece for supporting or limiting the box body part.
Still further, first spacing guide, second spacing guide all set up the track outside, first spacing guide, second spacing guide both ends all are equipped with the step face that is used for restricting the box part rear end position and puts.
Furthermore, the front end positioning mechanism is provided with positioning plates for limiting the front end positions of the box body parts on the inner side and the outer side of the track.
Furthermore, the two sides of the lower surface of the bottom plate are provided with guide bars.
Further, a stop block is arranged in the center of the lower surface of the bottom plate.
Further, a buffer is arranged on one side of the bottom plate.
The beneficial effects of the utility model are as follows:
the utility model is used for compatible processing of two box body parts (A series and B series), the upper surface of the box body part is flat, when the part is taken off the truss, the posture of the part is all upward and downward, and the upper flat plane is utilized to position the part on a positioning device;
the positioning device is added with plane positioning and axis limiting, so that the device is suitable for blanking placement of parts of different boxes; the pre-positioning guide is arranged, the A series and the B series correspond to different pre-positioning, do not interfere with each other, two different box parts can be conveyed, when the box parts randomly reach the truss discharging position, part positioning distinction is not needed to be considered, non-distinction conveying discharging is realized, and the types of trays are reduced.
A plurality of blanking positioning devices are stored in the blanking station, so that each set of devices can be guaranteed to descend in sequence, positioning and lateral buffering are added to avoid collision, blanking is convenient to pause, and mutual collision of trays is avoided; the window limiting mechanism is reserved as a window guide and is adjustable, so that the device is suitable for different batches of box body part blank holes with different positions.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a positioning device according to the present utility model;
FIG. 2 is a schematic view of the bottom surface structure of the positioning device of the present utility model;
FIG. 3 is a schematic view of the positioning device of the present utility model after placing the A-series boxes;
FIG. 4 is a schematic view of the structure of the positioning device of the present utility model after the positioning device is placed in the B-series box;
FIG. 5 is a schematic view of the positions of the limiting blocks in FIG. 3 when the A-series box is placed;
FIG. 6 is a schematic view of the positions of the limiting blocks in FIG. 4 when the B-series boxes are placed;
FIG. 7 is a top view of the locating surface of the A-series housing in the embodiment;
FIG. 8 is a top view of the locating surface of the B-series case in the embodiment;
The reference numerals are as follows: 1. the device comprises a first positioning support plate, a 1-1 part rear end support piece, a 1-2 part rear end limiting step surface, a 1-3 part front end positioning plate, a 1-4 part front end support piece, a2 part second positioning support plate, a 2-1 part rear end support piece, a 2-2 part rear end limiting step surface, a 2-3 part front end positioning plate, a 2-4 part front end support piece, a 3 part rear end limiting step surface, a third positioning plate, a 4 part window limiting mechanism, a 4-1 part window positioning plate I, a 4-2 part window positioning plate II, a 4-3 part window positioning plate III, a 5 part guide bar, a 6 part stop block, a 7 part buffer.
Detailed Description
Specific examples are given below to further clarify, complete and detailed description of the technical scheme of the utility model. The present embodiment is a preferred embodiment based on the technical solution of the present utility model, but the scope of the present utility model is not limited to the following embodiments.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used merely to distinguish between the descriptions and not to make a particular meaning.
For parts with similar appearance and dimension specifications, different types of feeding trays can be added through the transformation of a truss wire system, part grabbing manipulators are replaced, part buffering and exchanging stations among working procedures are supplemented, program control is added, feeding and clamping of parts of different boxes can be achieved, and processing tasks are completed; the compatibility transformation of the detection station realizes the online measurement of different parts, and the compatibility transformation of the offline station realizes the sequential offline of different parts according to the beat, thereby realizing the production of the truss wire multi-specification parts.
The truss automatic line can realize the compatible processing of two kinds of box parts (A series and B series, see the figures 3 and 4), and two kinds of parts are manually hoisted on a feeding roller way of a feeding station, are respectively placed on different feeding positioning devices, enter a storage bin on a truss manipulator, are grabbed by the truss manipulator, and are put into a processing middle box device or a material buffering waiting station to complete the feeding procedure.
When two kinds of box parts are processed by the truss automatic line, the material is fed according to the production demand proportion of the two kinds of parts when in different feeding stations, but in the processing process, the material is subjected to the processing beats of the different box parts, the truss is grabbed in sequence by the grabbing hands, the truss program flow is specified, equipment and tool faults, manual debugging, machine delay waiting and other factors are influenced, the two kinds of box parts are processed and finished, the material cannot be fed according to the original feeding sequence, the material received by the feeding stations is the part A or B when the material is randomly fed, and the material conveying device of the feeding stations cannot be designed for a single variety and can be installed and discharged according to the feeding station sequence.
In order to solve the problems, the blanking positioning device is designed in a compatibility way, when two box body parts randomly reach the truss blanking position, part positioning distinction is not needed to be considered, indiscriminate conveying blanking is realized, the blanking device reaches a loading and unloading area along a roller way, and people hoist and unload the blanking device to different storage areas.
According to the principle that the sizes and the appearance specifications of the parts are similar, the positioning surfaces of the parts are the same, and the hole systems on the positioning surfaces of the parts are arranged the same, different parts are placed in a distinguishing mode by positioning the appearance of the parts and the special holes on the positioning surfaces of the parts, and two different box parts can be conveyed.
Firstly, two box part structures are described, the whole structures of the two box bodies are similar, all parts on the box bodies are on the same plane, positioning and placement are easy, the upper schematic diagram of the A series part shown in fig. 7 is shown, the upper schematic diagram of the B series part shown in fig. 8 is the same as the left end external dimension which is larger than the right side external dimension, the difference is that the number of blank windows on the plane of the A part is more than that of the B part, but the positions of the windows on the plane of the B part are basically the same as those of the A part, and the blank windows can be used as axes for limiting. The length of the part B is shorter than that of the part A, and different limiting devices can be arranged according to the long and short gap positions, so that the left-end appearance positioning interference is eliminated. The right end of the part B is closed, the right end of the part A is open, and by utilizing the two characteristics, different limiting devices are respectively designed, so that the interference of the appearance of two boxes at the right end is avoided, and different limiting devices are used when different parts are placed.
The specific scheme is as follows:
The positioning device compatible with various tractor cases comprises a matched tractor case part A and a matched tractor case part B, wherein the positioning device comprises a bottom plate and a track arranged on the bottom plate, and a first positioning support plate 1, a second positioning support plate 2, a window limiting mechanism 4 and a third positioning plate 3 are sequentially arranged on the track from left to right along the length direction; the outer side of the track is arranged between the first positioning support plate 1 and the second positioning support plate 2, a first limiting guide rail and a second limiting guide rail are respectively arranged on one side, close to the window limiting mechanism 4, of the second positioning support plate 2, and a front end positioning mechanism is arranged on one side, close to the window limiting mechanism 4, of the third positioning plate 3;
the third positioning plate 3 comprises an A part front end supporting piece 1-4 for supporting and positioning a tractor box part A and a B part front end supporting piece 2-4 for supporting and positioning a tractor box part B;
The front end positioning mechanism comprises an A part front end positioning plate 1-3 which is arranged at the inner side of the track and used for limiting the front end open window of the tractor box part A, and a B part front end positioning plate 1-4 which is arranged at the outer side of the track and used for limiting the front end open window of the tractor box part B;
The first positioning support plate 1, the first limiting guide rail, the window limiting mechanism 4, the front end positioning plate 1-3 of the component A and the front end supporting piece 1-4 of the component A form a limiting mechanism for limiting and supporting the tractor box part A;
The second positioning support plate 2, the second limiting guide rail, the window limiting mechanism 4, the front end positioning plate 2-3 of the component B and the front end supporting piece 2-4 of the component B form a limiting mechanism for limiting and supporting the component B of the tractor box body.
Further, the window limiting mechanism 4 comprises a bearing table with a sliding groove at the bottom end and a plurality of window positioning plates arranged on the bearing table.
Further, the first positioning support plate 1 and the second positioning support plate 2 are respectively provided with a support member, and the support members are utilized to abut against the positioning surfaces of the parts of the tractor box body to limit the positions and keep a certain distance from the bottom plate
Further, the first limiting guide rail and the second limiting guide rail are arranged on the outer side of the track, and raised step surfaces are arranged at two ends of the first limiting guide rail and two ends of the second limiting guide rail. The step surface of the first limiting guide rail is used for limiting the appearance of the rear end blank of the tractor box part A, and the step surface of the second limiting guide rail is used for limiting the appearance of the rear end blank of the tractor box part B.
Further, the window limiting mechanism 4 is slidably arranged on the rail and is detachably mounted with the rail. The positioning surface of the tractor box body part is provided with a window, and the window is matched with the window limiting mechanism 4.
Further, the two sides of the lower surface of the bottom plate are provided with guide bars 5. When running on the blanking roller way, the guide bar 5 can reduce the contact area with the roller way, reduce friction force and facilitate the conveying of materials
Further, a stop block 6 is arranged in the center of the lower surface of the bottom plate. When the conveying device moves to the loading and unloading station, the stop device on the roller way ascends, the blocking device moves, the releasing button is operated after the box body part is manually lifted and unloaded, the stop device descends, the releasing device moves to the returning station, and the conveying device returns to the truss to wait for the discharging position through the returning station.
Further, a buffer 7 is arranged on one side of the bottom plate. The buffers 7 are made of rubber, two buffers 7 are arranged on the side edges, the lower line conveying device receives box body parts and moves towards the loading and unloading station, when the loading and unloading station has parts, rigid collision of moving metal is not avoided, the rubber buffers 7 are added on collision surfaces of the two sets of conveying devices, and damage caused by rigid collision is reduced.
Further, when the tractor box body part is taken off the truss, the postures are all that the upper surface is downward, and the upper surface is a positioning surface to be matched and butted with the positioning device. The upper surface is relatively flat, and the flat plane of the upper surface is utilized to position on the positioning device.
The specific working process is as follows:
1. the part placement process of the A series tractor box body comprises the following steps:
As shown in fig. 3 and 5, schematic diagrams of a state that the series a parts are placed on the positioning device, when the parts of the tractor box are grabbed by the truss manipulator and then placed on the positioning device, the rear end supporting pieces 1-1 of the parts a at the two ends on the first positioning support plate 1 of the device support the rear end plane of the parts of the tractor box, and the upper and lower positions of the rear end of the tractor box are determined to be correct; limiting the outline of a blank at the rear end of a part of the tractor box body by limiting step surfaces 1-2 at the rear end of the part A at two sides of the first limiting guide rail, and determining that the front and rear positions of the rear end of the part are correct;
The front end positioning plate 1-3 of the A part in the front end positioning mechanism limits the inner edge of an open window at the front end of the part, the front and back positions of the front end of the part are determined to be correct, the front end support piece 1-4 of the A part on the third positioning plate supports the front end plane of the part of the tractor box body, and the position in the up-down direction is determined to be correct.
The window locating plate I4-1, the window locating plate II 4-2 and the window locating plate III 4-3 on the window limiting mechanism are inserted into the open blank window on the part, and the position of the part in the left-right direction is determined to be correct.
2. B series part placement process
As shown in fig. 4 and 6, schematic diagrams of a state that the B-series parts are placed on the positioning device are shown, when the tractor box part is grabbed by the truss manipulator and then placed on the positioning device, the B-part rear end supporting pieces 2-1 at two ends on the second positioning support plate 2 of the device support the rear end plane of the tractor box part, and the upper and lower positions of the rear end of the tractor box are determined to be correct; limiting the blank shape of the rear end of the part of the tractor box body by the limiting step surfaces 2-2 of the rear end of the part B on both sides of the second limiting guide rail, and determining that the front and rear positions of the rear end of the part are correct;
The front end locating plate 2-3 of the B part in the front end locating mechanism limits the outline of a blank at the front end of the part, the front and back positions of the front end of the part are determined to be correct, the front end supporting piece 2-4 of the B part on the third locating plate supports the front end plane of the part of the tractor box body, and the position in the up-down direction is determined to be correct.
The window locating plate I4-1, the window locating plate II 4-2 and the window locating plate III 4-3 on the window limiting mechanism are inserted into the open blank window on the part, and the position of the part in the left-right direction is determined to be correct.
In summary, according to the positioning device for the tractor box body compatible with multiple varieties, through reasonable arrangement of the limiting and positioning devices, compatible bearing of two types of tractor box body parts is achieved, two different box body parts can be conveyed, when the box body parts randomly reach the truss blanking level, part positioning distinction does not need to be considered, and indiscriminate conveying blanking is achieved.
The foregoing has outlined and described the features, principles, and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present utility model, and that various changes and modifications may be made in the utility model without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a compatible many varieties tractor box positioner, still includes matched tractor box part A, dragline box part B, its characterized in that: the positioning device comprises a bottom plate and a track arranged on the bottom plate, wherein a first positioning support plate (1), a second positioning support plate (2), a window limiting mechanism (4) and a third positioning support plate (3) are sequentially arranged on the track from left to right along the length direction; the outer side of the track is arranged between the first positioning support plate (1) and the second positioning support plate (2), a first limiting guide rail and a second limiting guide rail are respectively arranged on one side, close to the window limiting mechanism (4), of the second positioning support plate (2), and a front end positioning mechanism is arranged on one side, close to the window limiting mechanism (4), of the third positioning support plate (3);
The first positioning support plate (1), the first limiting guide rail, the window limiting mechanism (4), the front end positioning mechanism and the third positioning support plate (3) form a limiting mechanism for limiting and supporting the tractor box body part A;
the second positioning support plate (2), the second limiting guide rail, the window limiting mechanism (4), the front end positioning mechanism and the third positioning support plate (3) form a limiting mechanism for limiting and supporting the tractor box body part B.
2. The multi-variety compatible tractor housing positioning device of claim 1, wherein: the window limiting mechanism (4) comprises a bearing table with a sliding groove at the bottom end and a plurality of window positioning plates arranged on the bearing table, and the window positioning plates are used for limiting windows on box parts.
3. The multi-variety compatible tractor housing positioning device of claim 2, wherein: the window limiting mechanism (4) is slidably arranged on the track and is detachably mounted with the track.
4. The multi-variety compatible tractor housing positioning device of claim 1, wherein: and supporting pieces for supporting or limiting the box body parts are arranged on the first positioning support plate (1), the second positioning support plate (2) and the third positioning support plate (3).
5. The positioning device for the box body of the compatible multi-variety tractor as defined by claim 4, wherein: the first limiting guide rail and the second limiting guide rail are arranged on the outer side of the track, and the first limiting guide rail and the second limiting guide rail are respectively provided with a step surface for limiting the placement of the rear end positions of the box body parts.
6. The positioning device for the box body of the compatible multi-variety tractor as defined by claim 4, wherein: the front end positioning mechanism is provided with positioning plates for limiting the front end positions of the box body parts on the inner side and the outer side of the rail.
7. The multi-variety compatible tractor housing positioning device of claim 1, wherein: guide bars (5) are arranged on two sides of the lower surface of the bottom plate.
8. The multi-variety compatible tractor housing positioning device of claim 1, wherein: the center of the lower surface of the bottom plate is provided with a stop block (6).
9. The multi-variety compatible tractor housing positioning device of claim 1, wherein: a buffer (7) is arranged on one side of the bottom plate.
CN202322768497.9U 2023-10-16 2023-10-16 Compatible many varieties tractor box positioner Active CN220810916U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322768497.9U CN220810916U (en) 2023-10-16 2023-10-16 Compatible many varieties tractor box positioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322768497.9U CN220810916U (en) 2023-10-16 2023-10-16 Compatible many varieties tractor box positioner

Publications (1)

Publication Number Publication Date
CN220810916U true CN220810916U (en) 2024-04-19

Family

ID=90700159

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322768497.9U Active CN220810916U (en) 2023-10-16 2023-10-16 Compatible many varieties tractor box positioner

Country Status (1)

Country Link
CN (1) CN220810916U (en)

Similar Documents

Publication Publication Date Title
CN107186903B (en) Automatic production line for numerical control machining of plate products
CN109175680B (en) Full-automatic PCB ultraviolet laser cutting machine
CN108788630B (en) Full-automatic processing device and process method for hub of gasoline engine
CN211708832U (en) Workpiece machining system adopting truss loading and unloading
CN211540233U (en) Intelligent robot feeding and discharging production line of horn fork processing machine tool
CN107954181B (en) Automatic conveying, taking and feeding system for cell basket
CN109731989B (en) Automatic stamping system for connecting lines of multi-station press
CN208629055U (en) A kind of Vehicle Processing automation line
CN220810916U (en) Compatible many varieties tractor box positioner
CN212823876U (en) Sheet metal production system
CN210692565U (en) Horizontal photovoltaic diffusion automation equipment
CN211966843U (en) Take numerical control automatic production line of buffer memory function
CN209753684U (en) Automatic sheet metal part bending production line
CN216780997U (en) Be applied to automation line of upper and lower punch machine tooling
CN218051309U (en) Flexible automatic processing production line
CN207696180U (en) One drag two manipulator coordinates bloom CNC automatic loading and unloading systems
CN210908126U (en) Make things convenient for digit control machine tool in plane car hole
CN210060412U (en) Automatic production line for welding anode plate
CN113182617A (en) Automatic carrying system of spiral bevel gear grinding robot
CN209745828U (en) On-line automatic silicon steel sheet inserting test machine
CN113798200A (en) Slide glass automatic detection platform based on visual detection and detection method thereof
CN207386466U (en) Three-D pressing robot
CN215880921U (en) Workpiece transfer equipment and production system comprising same
CN215755121U (en) Truss manipulator-based multi-station production line for one line body
CN219837041U (en) Automatic pile up neatly equipment that punches a hole of aluminum alloy floor robot

Legal Events

Date Code Title Description
GR01 Patent grant