CN103959998A - Hay turning and drying device allowing speed to be controlled and provided with separate hooks - Google Patents
Hay turning and drying device allowing speed to be controlled and provided with separate hooks Download PDFInfo
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- CN103959998A CN103959998A CN201410215021.5A CN201410215021A CN103959998A CN 103959998 A CN103959998 A CN 103959998A CN 201410215021 A CN201410215021 A CN 201410215021A CN 103959998 A CN103959998 A CN 103959998A
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- cylindrical shell
- support cylindrical
- hook
- outer support
- tedding
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- 238000001035 drying Methods 0.000 title abstract description 4
- 238000003756 stirring Methods 0.000 claims description 48
- 239000004459 forage Substances 0.000 claims description 37
- 230000008878 coupling Effects 0.000 claims description 27
- 238000010168 coupling process Methods 0.000 claims description 27
- 238000005859 coupling reaction Methods 0.000 claims description 27
- 238000005242 forging Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 3
- 238000010981 drying operation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
Provided is a hay turning and drying device allowing speed to be controlled and provided with separate hooks. The hay turning and drying device comprises an execution part and a connection part. The execution part is used for executing turning and drying operation and comprises an outer supporting cylinder (2), an inner supporting cylinder (3) and six turning hook components (1). The turning hook components (1) are uniformly fixed to the cylindrical surface of the outer supporting cylinder (2) in the peripheral direction. Every two of the six turning hook components (1) are arranged in the cylindrical peripheral direction of the outer supporting cylinder (2) at a 60-degree interval, and therefore the six turning hook components (1) are uniformly arranged in the cylindrical peripheral direction of the outer supporting cylinder (2).
Description
Technical field
The present invention relates to a kind of forage tedding device, relate more particularly to a kind of adjustable a kind of forage tedding device of cheicers degree that stirs.
Background technology
In Modern Animal Husbandry, conventionally need to plant a large amount of animal feeding-stuff forage, and need to a large amount of forage be cut down in the season of results, carried out the sun and tanned by the sun, after drying, collect storage, in order to pasture in winter.
Because the common planting density of forage on grassland is higher, therefore, after cutting down, the thickness of the forage layer that forage forms is very thick, is not easy to the sun and tans by the sun.Therefore, tan by the sun in order to make forage be subject to equably the sun, improve airing speed, make forage more resistance in storage, improve the quality of storage forage, need to repeatedly stir airing to forage layer.
At present, main dependence manually teds forage layer.The shortcoming of doing is like this apparent, and it is slow that it teds speed, and the amount of labour is large, and teds the uniformity and be restricted.
Also there is at present the mode that teds of some mechanizations, still, because the thickness of the forage layer on grassland can change, for the forage layer of different-thickness, stir machinery and be difficult to make adaptations and forage is tedded suitably and stirred.
Summary of the invention
The object of this invention is to provide a kind of adjustable forage tedding device of cheicers degree that stirs, it can be adapted to mechanization forage layer is tedded, and can, according to the tedding of various concrete forage layer thicknesses, ted hook and regulate adaptively; And regulate fast, unanimously, conveniently.
The technical solution used in the present invention is as follows:
A kind of forage tedding device that can carry out speed manipulation and there is crotch separately, it comprises operating part and coupling part, described operating part teds operation for carrying out, it comprises outer support cylindrical shell, inner support cylindrical shell and six stir hook part, and each hook part that stirs is fixed on the cylindrical surface of described outer support cylindrical shell in a circumferential direction equably, described in six, stir hook part space degree setting between two on the columniform circumferencial direction of described outer support cylindrical shell, thereby make to stir hook part described in six is uniformly distributed on the columniform circumferencial direction of described outer support cylindrical shell, described coupling part is for being connected to agri-vehicle by operating part, and described coupling part comprises line shaft, teds power part, thrust bearing and tedding device bracing frame, described line shaft first end is fixedly connected with outer support cylindrical shell, the second end with ted power part and be fixedly connected with.
Described in each, stir hook part and include supporting leg, the inner of described supporting leg is fixedly connected with outer support cylindrical shell, the outer end of described supporting leg is hinged with one end of stirring hook, stir the other end of hook and the outer end of screw rod is hinged, the inner of screw rod is threaded with the outer end of screw shell, the inner of screw shell is connected with one end of Hooks coupling universal coupling through the accessibke porosity on outer support cylindrical shell, the other end of Hooks coupling universal coupling is connected with the axle journal of bevel pinion through the inner via hole on inner support cylindrical shell, the axle journal place of described bevel pinion has inner bearing, described inner bearing is arranged in the annular support platform of inner surface of described inner support cylindrical shell, described annular support platform is welded on the inner surface of described inner support cylindrical shell by metal ring and forms, the position contacting with the outer surface of described inner support cylindrical shell at the described other end place of described Hooks coupling universal coupling is also provided with locking nut, in order to by place in the locking of the inside of inner support cylindrical shell to bevel pinion and inner bearing, in the accessibke porosity on outer support cylindrical shell, be provided with outer bearing in order to carry screw shell, the periphery of stirring hook part described in each is provided with flexible sheath, in order to protect the threaded engagement between screw shell and screw rod.
The described hook that stirs is divided into main part and bending hook portion, and described curved hook part is the first crotch and the second crotch, and the first crotch and the second crotch are formed separately from each other intermediate space, and are jointly connected to described main part.
Outer support cylindrical shell and line shaft are arranged on tedding device bracing frame revolvably by thrust bearing, inner support cylindrical shell is fixedly supported in outer support cylindrical shell, inner support cylindrical shell is provided with the rotating shaft that can rotate corresponding thereto along its central axis, in one end of described tedding device, outer support cylindrical shell with ted power part and be connected, to obtain the rotary power in the process of tedding; At the other end of described tedding device, described rotating shaft is connected with manual turntable, and described manual turntable is in order to receive operating personnel's manual rotation power; Described rotating shaft is provided with a bevel gear wheel along its axial direction; Described bevel gear wheel engages with described six bevel pinions.
Wherein, it is U-shaped that tedding device bracing frame is totally, it has bottom and two arms, described bottom is for being arranged on described agri-vehicle, the quantity of described thrust bearing is two, on described two arms, be respectively arranged with the installing hole for coordinating described thrust bearing, the installing hole end in two described installing hole spaces between contiguous described two arms is respectively arranged with the circumferential flange extending radially inwardly, described circumferential flange is for engaging the cycle surface of described thrust bearing, described line shaft is being provided with external screw thread near on the circumference side of its second end, on described external screw thread, be combined with locking nut, the end face of described locking nut is used for the inner ring end joined with corresponding thrust bearing, described line shaft increases near the section diameter of its first end, thereby forms stepped ring forging face, and described stepped ring forging face is used for the inner ring end joined with corresponding thrust bearing, when described line shaft stretches into and passes when two described thrust bearings in place are installed, by tightening described locking nut, line shaft can be locked, thereby described operating part is arranged on tedding device bracing frame revolvably.
In the time tedding power part and drive described outer support cylindrical shell to rotate on described tedding device bracing frame, described six are stirred hook part and can stir forage in turn.
In the time that described agri-vehicle advances, described forage tedding device can constantly stir the forage in front continuously; In the time stating manual turntable described in manual rotation, bevel gear wheel can drive bevel pinion to rotate, each bevel pinion can drive screw shell separately to rotate, and stirs hook swing, thereby can realize stirring the adjustment of hook with respect to supporting leg angle thereby can make screw rod drive.
Described forage tedding device also comprises speed feedback device and speed manipulation device, described speed feedback device is for feeding back to speed manipulation device by the pace of described agricultural vehicle, the pace of the agricultural vehicle that speed manipulation device can feed back according to described speed feedback device and the speed of service that teds power part is handled, thus the rotary speed of described operating part and the pace of agricultural vehicle are mated.
By above-mentioned technical scheme, because being suitable for adopting agricultural machinery, it drives, stir fast for forage, be suitable for large area and ted; Owing to adopting rotation hand wheel to drive each pinion rotation, and then drive that each stirs hook assembly eachly stir hook and carry out the swing of angle, thereby easy to adjust quick, and can ensure to stir the uniformity of hook angle adjustment, ensure tedding in process, vibration is minimum, teds evenly, and stability and the life-span of having improved equipment; And being provided with flexible sheath each stirring on hook assembly, the accuracy that can protect machinery to coordinate, effectively isolates with external environment, and can give mechanical part certain freedom of motion simultaneously.Whole scheme forms a tight entirety, cooperatively interacts, compact to design reasonable, is all reaching good technique effect aspect stability and reliability.
Brief description of the drawings
Fig. 1 is the transverse sectional view of the general structure of forage tedding device of the present invention;
Fig. 2 is forage tedding device of the present invention and the matching used schematic diagram of agri-vehicle;
Fig. 3 is the partial enlarged drawing of the part in Fig. 1;
Fig. 4 is the drive mechanism schematic diagram of pinion and gear wheel;
Fig. 5 is the mounting structure schematic diagram of operating part and bracing frame;
Fig. 6 is the system architecture diagram that speed is handled;
Fig. 7 is the structural representation that teds hook.
Embodiment
Below in conjunction with accompanying drawing 1-7, the present invention is described in detail.
A kind of forage tedding device that can carry out speed manipulation and there is crotch separately, it comprises operating part and coupling part, described operating part teds operation for carrying out, it comprises outer support cylindrical shell 2, inner support cylindrical shell 3 and six stir hook part 1, and each hook part 1 that stirs is fixed on the cylindrical surface of described outer support cylindrical shell 2 in a circumferential direction equably, described in six, stir hook part 1 space 60 degree settings between two on the columniform circumferencial direction of described outer support cylindrical shell 2, thereby make to stir hook part 1 described in six is uniformly distributed on the columniform circumferencial direction of described outer support cylindrical shell 2, described coupling part is for being connected to agri-vehicle 100 by operating part, and described coupling part comprises line shaft 203, teds power part 200, thrust bearing 204 and tedding device bracing frame 201, described line shaft 203 first ends are fixedly connected with outer support cylindrical shell 2, the second end with ted power part 200 and be fixedly connected with.
Described in each, stir hook part 1 and include supporting leg 13, the inner of described supporting leg 13 is fixedly connected with outer support cylindrical shell 2, the outer end of described supporting leg 13 is hinged with one end of stirring hook 14, stir the other end of hook 14 and the outer end of screw rod 12 is hinged, the inner of screw rod 12 is threaded with the outer end of screw shell 10, the inner of screw shell 10 is connected with one end of Hooks coupling universal coupling 8 through the accessibke porosity on outer support cylindrical shell 2, the other end of Hooks coupling universal coupling 8 is connected with the axle journal of bevel pinion 4 through the inner via hole on inner support cylindrical shell 3, the axle journal place of described bevel pinion 4 has inner bearing 7, described inner bearing 7 is arranged in the annular support platform 71 of inner surface of described inner support cylindrical shell 3, described annular support platform 71 is welded on the inner surface of described inner support cylindrical shell 3 by metal ring and forms, the position contacting with the outer surface of described inner support cylindrical shell 3 at the described other end place of described Hooks coupling universal coupling 8 is also provided with locking nut 18, in order to by place in the locking of the inside of inner support cylindrical shell 3 to bevel pinion 4 and inner bearing 7, in the accessibke porosity on outer support cylindrical shell 2, be provided with outer bearing 9 in order to carry screw shell 10, the periphery of stirring hook part 1 described in each is provided with flexible sheath 11, in order to protect the threaded engagement between screw shell 10 and screw rod 12.
The described hook 14 that stirs is divided into main part 143 and bending hook portion, and described curved hook part is that the first crotch 141 and the second crotch 142, the first crotches 141 and the second crotch 142 are formed separately from each other intermediate space, and is jointly connected to described main part 143.
Outer support cylindrical shell 2 and line shaft 203 are arranged on tedding device bracing frame 201 revolvably by thrust bearing 204, inner support cylindrical shell 3 is fixedly supported in outer support cylindrical shell 2, inner support cylindrical shell 3 is provided with the rotating shaft 26 that can rotate corresponding thereto along its central axis, in one end of described tedding device, outer support cylindrical shell 2 with ted power part 200 and be connected, to obtain the rotary power in the process of tedding; At the other end of described tedding device, described rotating shaft 26 is connected with manual turntable 36, and described manual turntable 36 is in order to receive operating personnel's manual rotation power; Described rotating shaft 26 is provided with a bevel gear wheel 6 along its axial direction; Described bevel gear wheel 6 engages with described six bevel pinions 4.
Wherein, it is U-shaped that tedding device bracing frame 201 is totally, it has bottom and two arms, described bottom is for being arranged on described agri-vehicle 100, the quantity of described thrust bearing 204 is two, on described two arms, be respectively arranged with the installing hole for coordinating described thrust bearing 204, the installing hole end in two described installing hole spaces between contiguous described two arms is respectively arranged with the circumferential flange 205 extending radially inwardly, described circumferential flange 205 is for engaging the cycle surface of described thrust bearing 204, described line shaft 203 is being provided with external screw thread near on the circumference side of its second end, on described external screw thread, be combined with locking nut 205, the end face of described locking nut 205 is used for the inner ring end joined with corresponding thrust bearing, described line shaft 203 increases near the section diameter of its first end, thereby forms stepped ring forging face 206, described stepped ring forging face 206 for the inner ring end joined of corresponding thrust bearing, when described line shaft 203 stretches into and passes when two described thrust bearings 204 in place are installed, by tightening described locking nut 205, line shaft 203 can be locked, thereby described operating part is arranged on tedding device bracing frame 201 revolvably.
In the time tedding power part 200 and drive described outer support cylindrical shell 2 to rotate on described tedding device bracing frame 201, described six are stirred hook part 1 and can stir forage in turn.
In the time that described agri-vehicle advances, described forage tedding device can constantly stir the forage in front continuously; In the time stating manual turntable 36 described in manual rotation, bevel gear wheel 6 can drive bevel pinion 4 to rotate, each bevel pinion 4 can drive screw shell 10 separately to rotate, swing thereby can make screw rod 12 drives stir hook 14, thereby can realize stirring the adjustment of hook 14 with respect to supporting leg 13 angles.
Described forage tedding device also comprises speed feedback device and speed manipulation device, described speed feedback device is for feeding back to speed manipulation device by the pace of described agricultural vehicle, the pace of the agricultural vehicle that speed manipulation device can feed back according to described speed feedback device and the speed of service that teds power part 200 is handled, thus the rotary speed of described operating part and the pace of agricultural vehicle are mated.
Claims (1)
1. the forage tedding device that can carry out speed manipulation and there is crotch separately, it comprises operating part and coupling part, described operating part teds operation for carrying out, it comprises outer support cylindrical shell (2), inner support cylindrical shell (3) and six stir hook part (1), and each stirring on the cylindrical surface that hook part (1) is fixed on described outer support cylindrical shell (2) in a circumferential direction equably, described in six, stir hook part (1) space 60 degree settings between two on the columniform circumferencial direction of described outer support cylindrical shell (2), thereby make to stir hook part (1) described in six is uniformly distributed on the columniform circumferencial direction of described outer support cylindrical shell (2), described coupling part is for being connected to agri-vehicle (100) by operating part, and described coupling part comprises line shaft (203), teds power part (200), thrust bearing (204) and tedding device bracing frame (201), described line shaft (203) first end is fixedly connected with outer support cylindrical shell (2), the second end with ted power part (200) and be fixedly connected with
Described in each, stir hook part (1) and include supporting leg (13), the inner of described supporting leg (13) is fixedly connected with outer support cylindrical shell (2), the outer end of described supporting leg (13) is hinged with one end of stirring hook (14), stir the other end of hook (14) and the outer end of screw rod (12) is hinged, the inner of screw rod (12) is threaded with the outer end of screw shell (10), the inner of screw shell (10) is connected with one end of Hooks coupling universal coupling (8) through the accessibke porosity on outer support cylindrical shell (2), the other end of Hooks coupling universal coupling (8) is connected with the axle journal of bevel pinion (4) through the inner via hole on inner support cylindrical shell (3), the axle journal place of described bevel pinion (4) has inner bearing (7), described inner bearing (7) is arranged in the annular support platform (71) of inner surface of described inner support cylindrical shell (3), described annular support platform (71) is welded on the inner surface of described inner support cylindrical shell (3) by metal ring and forms, the position contacting with the outer surface of described inner support cylindrical shell (3) at the described other end place of described Hooks coupling universal coupling (8) is also provided with locking nut (18), in order to by place in the locking of the inside of inner support cylindrical shell (3) to bevel pinion (4) and inner bearing (7), in the accessibke porosity on outer support cylindrical shell (2), be provided with outer bearing (9) in order to carry screw shell (10), the periphery of stirring hook part (1) described in each is provided with flexible sheath (11), in order to protect the threaded engagement between screw shell (10) and screw rod (12),
The described hook (14) that stirs is divided into main part (143) and bending hook portion, described curved hook part is the first crotch (141) and the second crotch (142), the first crotch (141) and the second crotch (142) are formed separately from each other intermediate space, and are jointly connected to described main part (143);
Outer support cylindrical shell (2) and line shaft (203) are arranged on tedding device bracing frame (201) revolvably by thrust bearing (204), inner support cylindrical shell (3) is fixedly supported in outer support cylindrical shell (2), inner support cylindrical shell (3) is provided with the rotating shaft (26) that can rotate corresponding thereto along its central axis, in one end of described tedding device, outer support cylindrical shell (2) with ted power part (200) and be connected, to obtain the rotary power in the process of tedding; At the other end of described tedding device, described rotating shaft (26) is connected with manual turntable (36), and described manual turntable (36) is in order to receive operating personnel's manual rotation power; Described rotating shaft (26) is provided with a bevel gear wheel (6) along its axial direction; Described bevel gear wheel (6) engages with described six bevel pinions (4);
Wherein, tedding device bracing frame (201) is totally U-shaped, it has bottom and two arms, described bottom is for being arranged on described agri-vehicle (100), the quantity of described thrust bearing (204) is two, on described two arms, be respectively arranged with the installing hole for coordinating described thrust bearing (204), the installing hole end in two described installing hole spaces between contiguous described two arms is respectively arranged with the circumferential flange (205) extending radially inwardly, described circumferential flange (205) is for engaging the cycle surface of described thrust bearing (204), described line shaft (203) is being provided with external screw thread near on the circumference side of its second end, on described external screw thread, be combined with locking nut (205), the end face of described locking nut (205) is used for the inner ring end joined with corresponding thrust bearing, described line shaft (203) increases near the section diameter of its first end, thereby forms stepped ring forging face (206), described stepped ring forging face (206) for the inner ring end joined of corresponding thrust bearing, when described line shaft (203) stretches into and passes when two described thrust bearings (204) in place are installed, by tightening described locking nut (205), line shaft (203) can be locked, thereby described operating part is arranged on tedding device bracing frame (201) revolvably,
Drive described outer support cylindrical shell (2) described tedding device bracing frame (201) is upper while rotating when tedding power part (200), described six are stirred hook part (1) and can stir forage in turn;
In the time that described agri-vehicle advances, described forage tedding device can constantly stir the forage in front continuously; In the time stating manual turntable (36) described in manual rotation, bevel gear wheel (6) can drive bevel pinion (4) to rotate, each bevel pinion (4) can drive screw shell (10) separately to rotate, stir hook (14) swing thereby can make screw rod (12) drive, thereby can realize stirring the adjustment of hook (14) with respect to supporting leg (13) angle;
Described forage tedding device also comprises speed feedback device and speed manipulation device, described speed feedback device is for feeding back to speed manipulation device by the pace of described agricultural vehicle, the pace of the agricultural vehicle that speed manipulation device can feed back according to described speed feedback device and the speed of service that teds power part (200) is handled, thus the rotary speed of described operating part and the pace of agricultural vehicle are mated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215021.5A CN103959998B (en) | 2014-05-21 | 2014-05-21 | Can speed manipulation be carried out and there is the forage tedding device of crotch separately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215021.5A CN103959998B (en) | 2014-05-21 | 2014-05-21 | Can speed manipulation be carried out and there is the forage tedding device of crotch separately |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103959998A true CN103959998A (en) | 2014-08-06 |
| CN103959998B CN103959998B (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410215021.5A Expired - Fee Related CN103959998B (en) | 2014-05-21 | 2014-05-21 | Can speed manipulation be carried out and there is the forage tedding device of crotch separately |
Country Status (1)
| Country | Link |
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| CN (1) | CN103959998B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB131824A (en) * | ||||
| CN2492051Y (en) * | 2001-08-07 | 2002-05-22 | 内蒙古海拉尔牧业机械总厂 | Rotary hayrake |
| CN2610630Y (en) * | 2003-01-09 | 2004-04-14 | 赤峰鑫秋农牧机械制造有限责任公司 | Novel greenfeed turning and sunning machine |
| CN201001296Y (en) * | 2007-02-13 | 2008-01-09 | 薛飞 | Side-hanging type raking machine |
| CN201294755Y (en) * | 2008-10-29 | 2009-08-26 | 拜哈孜·阿努尔别克 | Oil pressure hay rake |
| CN201577322U (en) * | 2009-10-21 | 2010-09-15 | 中节能(宿迁)生物质能发电有限公司 | Automatic tedder |
-
2014
- 2014-05-21 CN CN201410215021.5A patent/CN103959998B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB131824A (en) * | ||||
| CN2492051Y (en) * | 2001-08-07 | 2002-05-22 | 内蒙古海拉尔牧业机械总厂 | Rotary hayrake |
| CN2610630Y (en) * | 2003-01-09 | 2004-04-14 | 赤峰鑫秋农牧机械制造有限责任公司 | Novel greenfeed turning and sunning machine |
| CN201001296Y (en) * | 2007-02-13 | 2008-01-09 | 薛飞 | Side-hanging type raking machine |
| CN201294755Y (en) * | 2008-10-29 | 2009-08-26 | 拜哈孜·阿努尔别克 | Oil pressure hay rake |
| CN201577322U (en) * | 2009-10-21 | 2010-09-15 | 中节能(宿迁)生物质能发电有限公司 | Automatic tedder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103959998B (en) | 2015-10-28 |
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Address after: 225400 Jiangsu Province, Taixing City Industrial Park Xiangrong Road No. 18 Patentee after: Tianjin Sheng Xin Lian Education Technology Co., Ltd. Address before: 300060, Tianjin, Hexi District Lake Road, Binhu building, a negative layer B127 Patentee before: Tianjin Sheng Xin Lian Education Technology Co., Ltd. |
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Effective date of registration: 20170614 Address after: 065701, room 2, unit 18, 201 Garden Road, lotus garden, Shengfang Town, Bazhou City, Hebei, Langfang Co-patentee after: Li Tingting Patentee after: Liu Fei Co-patentee after: Gao Wei Address before: 300203 three Shaoxing Road, Delhi, 103, 8, Hexi District, Tianjin Patentee before: Tianjin Feijie Technology Co. Ltd. |
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Effective date of registration: 20181029 Address after: 402371 10 groups of Dongsheng village, shuangting bridge, Chongqing Patentee after: Guckling chicken farm of Shuangqiao in Chongqing Address before: 065701 Room 201, unit 2, road 18, Holland garden, Shengfang Town, Bazhou, Langfang, Hebei Co-patentee before: Li Tingting Patentee before: Liu Fei Co-patentee before: Gao Wei |
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Effective date of registration: 20190103 Address after: 404700 No. 426 Jingtan Road, Wuxia Town, Wushan County, Chongqing Patentee after: Wushan Xinmu Grass Industry Science and Technology Co., Ltd. Address before: 402371 10 groups of Dongsheng village, shuangting bridge, Chongqing Patentee before: Guckling chicken farm of Shuangqiao in Chongqing |
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Granted publication date: 20151028 Termination date: 20190521 |
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