CN1096827C - Miniature rotary cultivator - Google Patents
Miniature rotary cultivator Download PDFInfo
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- CN1096827C CN1096827C CN99118237A CN99118237A CN1096827C CN 1096827 C CN1096827 C CN 1096827C CN 99118237 A CN99118237 A CN 99118237A CN 99118237 A CN99118237 A CN 99118237A CN 1096827 C CN1096827 C CN 1096827C
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- gearbox
- main body
- wheel
- rotary tillage
- travel wheel
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- 238000003971 tillage Methods 0.000 claims description 36
- 230000005540 biological transmission Effects 0.000 description 15
- 239000002689 soil Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000009194 climbing Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000006424 Flood reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The small rotary cultivator with herringbone structure includes power machine, driving wheel, clutch, gear box, walking wheel, rotary cultivating wheel and operating frame, and features that the gear box of the whole cultivator is herringbone structure and the gear box of the herringbone structure is connected to the main body of the cultivator.
Description
The present invention relates to farm land harvesting and tillage machine tool.
Existing and the tractor of China, based on the farming paddy field, serial rotovator and amelioration product thereof that floods and droughts is general, its structure is the rear end that the rotovator configuration is connected in tractor, by the tractor traction and drive the rotation of rotary tillage wheel soil is carried out ploughing operation.Being categorized as by its rotation direction just changes climb cutting and counter-rotating upmilling two big classes, is just changeing the climb cutting rotovator and is being mainly used in rotary tillage operation to soil, and counter-rotating upmilling rotovator is mainly used in shallow plowing and covering green manure (burying blue or green machine).Existing weak point is: 1, be subjected to the restriction of roomy body of supporting tractor and weight, the walking trafficability characteristic is poor, and the tractor road of the farm work of entering need be arranged, and can not climb and go up bank, incompatibility mountain region, hillside fields, ploughing of soil, hills are put in order, and practicality is restricted.2, complete machine manufacturing cost height, manufacturing process is numerous and diverse, can't realize one-machine-multi-function (climb cutting rotary tillage and upmilling bury green grass or young crops).3, maintain and deposit keeping inconvenience.In existing soil rotovator technology, also have the small-sized rotovator of a kind of one-wheel type, it comprises engine, clutch, drive, gearbox, rotary tillage wheel etc., during gearbox tiltedly stood in, upper end and engine connected, lower end and rotary tillage wheel connect, and rear end and crosshead connect, and existing weak point is rotary tillage depth as shallow and wayward, soil property is changed bad adaptability, operate not steadily, ploughing of incompatibility loess, clay soil and paddy field is whole, and practicality is restricted.
The objective of the invention is to overcome above-mentioned prior art weak point, provide a kind of and can climbing get over bank, the walking ridge, floods and droughts is general, and is in light weight, and volume is little, and cost is low, the small-sized rotovator that manufacturing process is simple and direct.
Technical scheme of the present invention is earlier the gearbox split to be designed to main body and arm body two partly, by connector main body and arm body is formed the gearbox of chevron shaped structure by chevron shaped structure is interconnected for one again, and makes it become the connection main body of complete machine simultaneously.Wherein the main body of gearbox is the center connected body, engine, drive, travel wheel, the arm body by connector be connected in main body around, rotary tillage wheel is connected in the lower end of arm body by connector, crosshead is connected in the upper end of main body or arm body by connector.Concrete structure is before main body is stood in to retreading, after the arm body is supported on forward, between main body and the arm body by chevron shaped structure by the interconnected gearbox of forming chevron shaped structure for one of connector, complete machine serves as to connect main body with the gearbox of chevron shaped structure, engine is connected in the middle upper end of main body by connector, travel wheel is connected on the power take-off of the preceding lower end of main body by connector, drive, clutch is connected in the back upper end of main body by connector, crosshead is connected in the upper end of main body or arm body by connector, and the rotary tillage wheel is connected in by connector on the power take-off of gearbox arm body lower end of chevron shaped structure.Power is imported in the gearbox by belt, drive, clutch by engine, after speed change, be transmitted to travel wheel and rotary tillage wheel by main body and arm body, by the travel condition of travel wheel control rotovator, under dynamic action, rotate by the ploughing operation of gravity realization soil by the rotary tillage wheel.By the gearbox split being designed to main body and arm body two partly, the gearbox power transmission line is simplified, its main transfer route is exported until travel wheel by the drive input from top to bottom, rotary tillage power is then got by the demand branch from the main transmission route by the arm body and is transmitted to the rotary tillage wheel after the some, make its structure be the geometrical shaped body of rule thereby the phase mutual interference does not take place the transmission of power between the main body of making and the arm body, not only be convenient to the speed change commutation, realize one-machine-multi-function, and be convenient to adopt sheet-metal press working welding fabrication technology and cast shaping process, improve its anufacturability, the width of its main body is not subjected to the restriction of tilling width and other condition and can significantly reduces after satisfying the power transmission needs simultaneously, thereby the wheelspan between travel wheel is reduced, reduce the current condition of width of roadway, the rotary tillage function is walked between the ridge, improve the walking handling capacity.By the gearbox with chevron shaped structure serves as to connect main body, saves the connection frame, makes rotovator structure small compact, and alleviates complete machine weight, reduces manufacturing cost, is convenient to deposit keeping.By chevron shaped draw bail between main body and arm body, the operational stability of rotovator is improved, the while stands to retreading because of main body travel wheel is given prominence to preceding, turns over the bank ability thereby make rotovator possess stronger climbing.
The drawing explanation: Fig. 1 is the structural representation of inventor's font arm structure body gearbox.Fig. 2 is Figure 1A-A cutaway view.Fig. 3 is the structural representation of inventor's font single armed structure gearbox.Fig. 4 is Fig. 3 A-A cutaway view.Fig. 5 is the last draw bail schematic diagram of inventor's font single armed structure gearbox.Fig. 6 is the lower link structural representation of inventor's font single armed structure gearbox.Fig. 7 is the full draw bail schematic diagram of inventor's font single armed structure gearbox.Fig. 8 is a kind of travel wheel combining structure of the present invention schematic diagram.
The invention will be further described below in conjunction with accompanying drawing (embodiment).
With reference to Fig. 1, shown in Figure 2, chevron shaped gearbox is made up of main body 3 and left and right sides both arms body 11, engine 1 connects by screw rod and machine plate 20 activity orientation, machine plate 20 is welded on the middle and upper part of main body 3, unclamp the removable engine 1 of screw rod, be used to adjust the position of centre of gravity of complete machine, left and right sides travel wheel 5 is by connector (nut, the key axle, collar etc.) be connected on the power take-off of main body 3 preceding lower ends, drive 2 and crosshead 7 are by connector (screw rod, nut, splined shaft etc.) be connected in the back upper end of main body 3, main body 3 power transmission can adopt the tooth transmission, chain drive and belt transmission etc., the upper end of both arms body 11 connects or is fixedly welded on the middle part of main body 3 by left and right sides connecting tube 18 usefulness screw rods 19 activity orientation, rotary tillage wheel 9 is by connector (key axle, the location gusset piece, screw rod, nut etc.) be connected on the power take-off of both arms body 11 posterior ends, main body 3 and both arms body 11 are formed the gearbox of chevron shaped arm structure body by chevron shaped structure is interconnected for one, and become the connection main body of complete machine simultaneously.The width dimensions of main body 3 should reduce after satisfying the transmission demand as far as possible, thereby make travel wheel 5 obtain less wheelspan, the transmission of power of both arms body 11 can adopt side tooth or side chain drive, tool box 14 usefulness screw rods are connected on the crosshead 7, and dashboard 10 and the careless net 15 usefulness screw rods of retaining are connected in the lower end of crosshead 7.Rubber tire 17 is connected in the posterior end of crosshead 7.During the rotovator walking, rear end rubber tire 17 is put down bed hedgehopping rotary tillage wheel 9 to make it to break away from behind the road surface with alignment pin 16 lockings, contact to earth and go by travel wheel 5 and rubber tire 17, the wheelspan of travel wheel 5 only is subjected to the restriction of main body 3 width and is significantly dwindled, thereby reduce the width requirement on current road surface, the rotary tillage function is walked between the ridge, improve the walking handling capacity of complete machine, simultaneously because of travel wheel 5 is connected in the front end of complete machine before prominent, thereby possesses stronger climbing and turn over the bank ability.Also can connect annexes such as compacting rod, slide plate, ship shape body on the coupled position of rear end rubber tire 10, whole to adapt to ploughing of all kinds of soil.Start engine 1, power is in belt, drive 2, clutch are imported into gearbox main body 3, transmit after the speed change and give travel wheel 5 and give rotary tillage wheel 9 by 11 fens speed transmission of both arms body, operated clutch handle 8 by regulating gear change hand lever 4, can make travel wheel 5 obtain different gait of march, by interlock break-in handle 12,13, the relative of adjustable whole travel wheel 5 and rotary tillage wheel 9 turns to realize just changeing the selection of climb cutting and counter-rotating upmilling, opens the throttle 6, control crosshead 7 advance realize ploughing whole.Plough perfect square to adjusting can on to carry crosshead 7 be the fulcrum adjustment that swings with travel wheel 5.Advance and rotary tillage wheel 9 rotates counterclockwise rotary tillage and realizes just changeing climb cutting and plough when whole when travel wheel 5 rotates counterclockwise, soil is thrown to the rear end counterclockwise, whereabouts through dashboard 10 stops after.When rotating counterclockwise, travel wheel 5 advances and rotary tillage wheel 9 clockwise rotates rotary tillage and realizes that the counter-rotating upmilling ploughs when whole, soil and draft are thrown to the rear after rolling clockwise, before draft is kept off careless net 15 and is dropped under stopping, after soil is crossed the careless net 15 of retaining and dropped under dashboard 10 stops and cover draft.With reference to shown in Figure 1, the profile of chevron shaped gearbox main body 3 and both arms body 11 is the geometrical shaped body of rule, its technology manufacturing is good, recommend to adopt plate disposable high-speed precise punch forming welding procedure, avoid carrying out fine finishining again after the hot-working skills such as founding, die casting, thereby the condensation manufacturing procedure significantly reduces manufacturing cost and alleviates complete machine weight.
With reference to Fig. 3, shown in Figure 4, the gearbox of chevron shaped structure is made up of main body 3 and single armed body 11, single armed body 11 is connected in the back middle part of main body 3 by bolt 19, the two is interconnected by chevron shaped structure to be one, the gearbox of forming chevron shaped single armed structure, complete machine serves as to connect main body with the gearbox of chevron shaped single armed structure simultaneously, engine 1 is connected in the middle and upper part of main body 3 by machine plate 20, on machine plate 20, also there is not adjustable shelf 21, adjustable shelf 21 and machine plate 20 twisted axis are movable to be connected, but the swing of adjustable shelf 21 easy on and off is used for the lift to move displacement of complete machine.Preceding upper end in main body 3 also is provided with balladeur train 23, also is provided with raking arm 22 on balladeur train 23, and raking arm 22 is actively connected on the balladeur train 23, realizes that by keeper (bolt, pin rod) location connects, and by regulating the height that stretches out of raking arm 22, can realize harrowing dark adjusting.By regulating handle 24, can make the location swap of balladeur train 23 and rubber tire frame 17, to be applicable to that ploughing of paddy field with ponded water in winter put in order and tillage operation is raked the soil level in enforcement.Crosshead 7 by Bolt Connection in the back upper end of main body 3 and the preceding upper end of single armed body 11, the rotary tillage wheel was connected on the power take-off of single armed body 11 posterior ends in about 9 minutes, with reference to shown in Figure 4, the width dimensions of single armed body 11 is after satisfying the transmission of power demand, should dwindle (being generally less than 50 millimeters) as much as possible, thereby reduce influence, improve and plough whole quality the full wide requirement of rotary tillage.Travel wheel is actively connected on the power take-off of main body 3 preceding lower ends about dividing, and realizes that by alignment pin 27 location connects, and extraction alignment pin 27 can be regulated the wheelspan between the travel wheel of the left and right sides, to be applicable to various current condition and to plough whole required.The width dimensions of main body 3 should reduce after satisfying the transmission of power demand as much as possible, thereby makes travel wheel obtain less wheelspan, and ridge is given in walking.Left and right sides travel wheel is combined by plastic roller 26 and steel inserted sheet 25, the axle of steel inserted sheet 25 lower ends and the hole on plastic roller 26 wheel carriers be movable to cooperate that to pass through positioning screw 28 interconnected be one, unclamp positioning screw 28, can twitch steel inserted sheet 25 outwards moves, be used to regulate the wheel footpath of travel wheel, put in order to be applicable to various dissimilar soil properties and ploughing of paddy field.Complete machine when walking, can unclamp positioning screw 28, extract steel inserted sheet 25 out, to contact to earth and go by left and right sides plastic roller 26 and rear end rubber tire 17, the while gives prominence to preceding because of left and right sides travel wheel, gets over the bank ability thereby make complete machine possess stronger climbing.Start engine 1, operated clutch handle 8 opens the throttle 6, controls crosshead 7 and advances, and realizes ploughing whole.Plough perfect square to adjusting can on to carry crosshead 7 be the fulcrum adjustment that swings with the travel wheel.With reference to shown in Figure 1, main body 3 and single armed body 11 are the geometrical shaped body of rule, and its anufacturability is good, recommend to adopt the sheet-metal press working forming-welding technology, reduce manufacturing cost.
With reference to shown in 5 figure, engine 1 is connected in the middle and upper part of main body 3, left and right sides travel wheel 5 is connected on the power take-off of main body 3 preceding lower ends by connector, the front end of single armed body 11 is connected in the back upper end of main body 3 by gusset piece 29 usefulness screw rods, main body 3 and single armed body 11 are formed the gearbox of chevron shaped single armed structure by chevron shaped structure is interconnected for one, and become the connection main body of complete machine simultaneously.Crosshead 7 is connected in the upper end of single armed body 11 by support 30 usefulness screw rods, rotary tillage wheel 9 is connected on the power take-off of single armed body 11 posterior ends by connector, the influence of rotary tillage being expired wide requirement for the width that reduces single armed body 11, after satisfying the power transmission needs, the width dimensions of its single armed body 11 should dwindle (being generally less than 50 millimeters) as far as possible.Operating grip 31, liftable rear end rubber tire 17 is used for walking and control tilling depth.
With reference to shown in Figure 6, for reducing the position of centre of gravity of complete machine, the front end of single armed body 11 is connected in the posterior end of main body 3 by gusset piece 29 usefulness screw rods, main body 3 and single armed body 11 are by the interconnected gearbox of forming chevron shaped single armed structure for one of chevron shaped structure, and become the connection main body of complete machine simultaneously, be the influence to the full wide requirement of rotary tillage of the width that reduces single armed body 11, after satisfying the power transmission needs, the width dimensions of its single armed body 11 should dwindle (being generally less than 50 millimeters) as far as possible.
With reference to shown in 7, for strengthening the rigidity of complete machine, the front end expansion back of single armed body 11 is connected in the rearward end of main body 3 by gusset piece 29 usefulness screw rods, main body 3 and single armed body 11 are by the interconnected gearbox of forming chevron shaped single armed structure for one of chevron shaped structure, and become the connection main body of complete machine simultaneously, the width of single armed body 11 should reduce (being generally less than 50 millimeters) as much as possible after satisfying the power transmission demand, to realize completely wide rotary tillage, crosshead 7 connects (screw rod connects or welding) back upper end in main body 3 by support 32, rear end rubber tire 17 and 34 combinations of rake cutter are connected in the afterbody of elevating lever 33, wherein rubber tire 17 and elevating lever 33 twisted axis are movable connects, can swing up and down, rake cutter 34 and elevating lever 33 are fixedly welded on the both sides of rubber tire 17, and the width of rake cutter 34 is suitable with the rotary tillage width.During the complete machine walking, rubber tire 17 bottoms are locked with screw rod to the upright position, make the profile of rubber tire 17 surmount rake cutter 34 down, operating grip 31 makes elevating lever 33 drop to rubber tire 17 to contact to earth and make rotary tillage take turns 9 bed hedgehoppings and break away from the road surface, is contacted to earth and is gone by left and right sides travel wheel 5 and rubber tire 17.During the complete machine ploughing operation, operating grip 31 can be regulated elevating lever 33, is used to control tilling depth.
With reference to shown in Figure 8, the wheel sheet of travel wheel 5 is connected as one by rivet 36 and garment bag 35 combinations, thereby makes travel wheel 5 can be applicable to the walking on various road surfaces.Certainly when rotovator is walked, also travel wheel 5 can be changed the outfit and go for rubber tire contacts to earth.
The above is not to be of the present invention whole, and we can make up according to inventive concept and prior art, and is as in main body 3 preceding lower ends ship shape body annex being set, whole to be applicable to ploughing of paddy field with ponded water in winter.Also can regulate break-in handle 13 locking travel wheel 5, make rotary tillage wheel 9 rotations acting downwards, be used for tree well and excavate.The profile of main body 3 also can curved body.Travel wheel 5 also can be single-wheel, before being arranged on.The location connector can be pin, screw rod, key, irregularly-shaped hole, flange etc.Rectification that coupled position between main body and arm body is also adjustable becomes, and only needs to satisfy be located at outside the rotary tillage wheel profile etc.
The invention has the advantages that excellent manufacturing manufacturability, cheap for manufacturing cost, trafficability characteristic is strong, one-machine-multi-function, Practicality is good.
Claims (3)
1, a kind of small-sized rotovator comprises engine, drive, clutch, gearbox, travel wheel, rotary tillage wheel, crosshead, the gearbox behaviour font structure body that it is characterized in that complete machine, complete machine serves as to connect main body with the gearbox of chevron shaped structure, and engine is connected in the front upper part of gearbox, and travel wheel is connected in the preceding lower end of gearbox, the rotary tillage wheel is connected in the posterior end of gearbox, and crosshead is connected in the upper end of gearbox.
2, small-sized rotovator as claimed in claim 1 is characterized in that described gearbox is chevron shaped arm structure body.
3, small-sized rotovator as claimed in claim 1 is characterized in that described gearbox is chevron shaped single armed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99118237A CN1096827C (en) | 1998-11-18 | 1999-09-09 | Miniature rotary cultivator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98117047 | 1998-11-18 | ||
| CN98117047.1 | 1998-11-18 | ||
| CN99118237A CN1096827C (en) | 1998-11-18 | 1999-09-09 | Miniature rotary cultivator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1253710A CN1253710A (en) | 2000-05-24 |
| CN1096827C true CN1096827C (en) | 2002-12-25 |
Family
ID=25744724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99118237A Expired - Fee Related CN1096827C (en) | 1998-11-18 | 1999-09-09 | Miniature rotary cultivator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1096827C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869015A (en) * | 2010-06-09 | 2010-10-27 | 左佳奇 | Rotary cultivator realizing front deep and extensive cultivation and rear shallow and fine crushing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103749011B (en) * | 2014-02-20 | 2015-11-25 | 湖南省农友机械集团有限公司 | A kind of step ploughs formula rotovator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2085144U (en) * | 1991-02-09 | 1991-09-25 | 于延和 | Double-arm transmission rotary ploughing machine for small-size four-wheel tractor |
| CN2104530U (en) * | 1991-10-08 | 1992-05-20 | 郑庆山 | Small-sized power-driven cultivator |
| CN1066756A (en) * | 1991-05-15 | 1992-12-09 | 包头市供销机械厂 | Rotary cultivator for smashing stubble |
| CN2224114Y (en) * | 1995-01-06 | 1996-04-10 | 樊高升 | Micro walking-tractor |
| CN2246886Y (en) * | 1996-02-29 | 1997-02-12 | 甄子健 | Rotary cultivator with arc-shaped harrow bar |
| CN2253104Y (en) * | 1996-06-05 | 1997-04-30 | 四平农机工程机械制造总公司 | Stubble cleaner |
| CN2274863Y (en) * | 1996-06-05 | 1998-02-25 | 四平市农业机械化研究所 | Small power-driven rotary plow |
-
1999
- 1999-09-09 CN CN99118237A patent/CN1096827C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2085144U (en) * | 1991-02-09 | 1991-09-25 | 于延和 | Double-arm transmission rotary ploughing machine for small-size four-wheel tractor |
| CN1066756A (en) * | 1991-05-15 | 1992-12-09 | 包头市供销机械厂 | Rotary cultivator for smashing stubble |
| CN2104530U (en) * | 1991-10-08 | 1992-05-20 | 郑庆山 | Small-sized power-driven cultivator |
| CN2224114Y (en) * | 1995-01-06 | 1996-04-10 | 樊高升 | Micro walking-tractor |
| CN2246886Y (en) * | 1996-02-29 | 1997-02-12 | 甄子健 | Rotary cultivator with arc-shaped harrow bar |
| CN2253104Y (en) * | 1996-06-05 | 1997-04-30 | 四平农机工程机械制造总公司 | Stubble cleaner |
| CN2274863Y (en) * | 1996-06-05 | 1998-02-25 | 四平市农业机械化研究所 | Small power-driven rotary plow |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101869015A (en) * | 2010-06-09 | 2010-10-27 | 左佳奇 | Rotary cultivator realizing front deep and extensive cultivation and rear shallow and fine crushing |
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| Publication number | Publication date |
|---|---|
| CN1253710A (en) | 2000-05-24 |
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Owner name: CHONGQING GENGFU MACHINERY MANUFACTURING CO., LTD Free format text: FORMER OWNER: DU ZHIWEI Effective date: 20070105 |
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Effective date of registration: 20070105 Address after: 402764, 125, Cheng Yu Road, Ding Jia town, Bishan County, Chongqing, Sichuan Patentee after: Cq Gofo Machinery Manufacturing Co., Ltd. Address before: 628017 120 mailbox 82, Guangyuan City, Sichuan Province Patentee before: Du Zhiwei |
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