CN203093741U - Four-wheel drive bowing type steering multi-purpose tractor - Google Patents
Four-wheel drive bowing type steering multi-purpose tractor Download PDFInfo
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- CN203093741U CN203093741U CN 201320115731 CN201320115731U CN203093741U CN 203093741 U CN203093741 U CN 203093741U CN 201320115731 CN201320115731 CN 201320115731 CN 201320115731 U CN201320115731 U CN 201320115731U CN 203093741 U CN203093741 U CN 203093741U
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Abstract
The utility model discloses a four-wheel drive bowing type steering multi-purpose tractor. A rear frame of the four-wheel drive bowing type steering multi-purpose tractor is provided with a diesel engine, a gear case, a transfer case, a brake hub, a power output reducer casing, a rear axle and walking wheels. A front frame is provided with a transition device, a front axle and walking wheels. A driving belt wheel of the diesel engine is connected with a driven belt wheel of the gear case, an output shaft of the gear case is connected with an input shaft of the transfer case, and two ends of an output shaft of the transfer case are connected with differential mechanisms. The brake hub is arranged on a middle shaft of the transfer case, a clutch is arranged inside the driven belt wheel, a transmission shaft I is connected with the driven belt wheel, the other end of the transmission shaft I is connected with the power output reducer casing, one end of a rear power output shaft achieves rear power output, and a driving chain wheel is installed at the other end of the rear power output shaft. The driving chain wheel is connected with a driven chain wheel at one end of a transmission shaft II, a small driving chain wheel at the other end of the transmission shaft II is connected with a small driven chain wheel on a transmission shaft III of the transition device, and a front power output shaft of the transition device is connected with a matching machine to achieve front power output. The four-wheel drive bowing type steering multi-purpose tractor is provided with a plurality of power output openings, and is flexible in steering and wide in application range.
Description
Technical field
The utility model relates to a kind of field machine, specifically is that a kind of four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac..
Background technology
Agriculture machinery industry is today of standard progressively, and seeking a kind of efficient height, energy-conserving and environment-protective, safe and reliable cultivation mode of cultivating becomes current problem demanding prompt solution.Four wheel drive articulated steering trac. operating efficiency height, safety is good, and oil consumption is low, is convenient to operation, C﹠M, can satisfy various cereal crops and industrial crops farming demand.Simultaneously, along with the development of rural water conservancy construction and small-sized construction, loading and unloading place mechanization, construction machinery and equipments such as excavating machine, scoper, loader are generally adopted, and use to have reached higher proportion in modern agriculture.Because the construction machinery and equipment price is higher, numerous and confused excavating machine, the scoper that converts by small four-wheel tractor of buying of peasant.These model structures are simple, price is lower, can on the basis of original small four-wheel tractor, change the orientation of seat, bearing circle, clutch, throttle, brake, trac. is become down open type, excavating gear, earth-moving equipment or loading attachment are installed behind change speed gear box be formed.Four wheel drive articulated steering trac. is as long as more alias just can be extended to excavating machine, scoper, loader etc., and is simple to operate, convenient and easy.Under the promotion of national policy and under the pulling of the field machine market demand, adaptable novel trac. will become the important force of farming from now on, and the wherein novel trac. market demand presents the situation that increases year by year.The four wheel drive formula of bowing turns to middle-size and small-size tractor mass light and handy, flexible, can solve problems such as general trac. landform comformability is relatively poor, satisfies intersected country user's demand.
But find at present to have a plurality of takeoff output mouths simultaneously as yet, turn to the four wheel drive formula of bowing flexibly to turn to the relevant report of high-mobility, multipurpose, wheeled vehicle trac..
The utility model content
Technical problem to be solved in the utility model provides a kind ofly to be had a plurality of takeoff output mouths simultaneously, turns to flexibly that the four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac..
The utility model solves the problems of the technologies described above with following technical scheme:
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., it comprises the back axle 16 of propons 13, the band back diff 15 of diff 14 before front vehicle frame 10, back vehicle frame 8, the band, two front side road wheels 12 and two rear side road wheels 37, and diesel engine 1, change speed gear box 5, auxiliary gear box 6, braking hub 7, takeoff output drop-gear box 21, back axle 16 and rear side road wheel 37 are installed on the vehicle frame 8 of back; Turner 31, propons 13 and front side road wheel 12 are installed on front vehicle frame 10; Front vehicle frame 10 is hinged through vertical axis 9 with back vehicle frame 8, be equipped with between back vehicle frame 8 and the propons 13 and turn to oil cylinder 35, driving pulley 2 on diesel engine 1 output shaft is connected with driven pulley 4 on change speed gear box 5 input shafts through belt 3, the output shaft of change speed gear box 5 connects the input shaft of auxiliary gear box 6, the two ends of auxiliary gear box output shaft 18 are connected with the diff of forward and backward bridge through the universal coupling group respectively, to drive four road wheels, tween drive shaft one end of auxiliary gear box 6 is equipped with braking hub 7, to realize braking during standstill; Described driven pulley 4 built-in clutch also connect transmission shaft I 20, and the other end of transmission shaft I 20 connects takeoff output drop-gear box 21, and rear power output shaft 22 1 ends of takeoff output drop-gear box 21 are realized the back takeoff output; Rear power output shaft 22 other ends of takeoff output drop-gear box 21 are equipped with drive sprocket 23, drive sprocket 23 is connected through the driven sprocket 25 of chain 24 with transmission shaft II 26 1 ends, transmission shaft II 26 is vertically installed along the back vehicle frame, the little driven sprocket 29 of the little drive sprocket 27 of transmission shaft II 26 other ends on the transmission shaft III 30 of chain 28 and turner 31 is connected, the preceding power take-off shaft 33 of turner 31 through preceding power output sprocket 32 be connected with outfitting tool realize before takeoff output.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., on the described change speed gear box 5 hydraulic pressure power takeoff 19 is installed, and the gear of hydraulic pressure power takeoff 19 links to each other with the gear of change speed gear box 5, to obtain hydraulic power, offers hydraulic actuator.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., and described diesel engine is that rearmounted traverse is arranged vertical, placed in the middle layout that change speed gear box is; The transmission shaft I is passed below diesel engine 1 oil pan tray.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., and described front side road wheel is identical with the diameter of rear side road wheel, can exchange front and back.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., and the center of the diff 14 bonded assembly universal coupling groups of described and propons 13 overlaps substantially with the axle center of vertical axes 7.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., and I class standard trifilar suspension assembly 34 is installed in the back of afer bay 8.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., below the mmi machine frame (10), is hinged with the propons 13 of diff 14 before the band by horizontal shaft 11.
The utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac. to have following advantage:
1. the diesel engine postposition is horizontal, and many takeoff outputs mouth is arranged: postposition helps the various functions of the anterior expansion of trac., as installs agriculture spray irrigation system additional, agricultural water conservancy machineries such as the bucket of expansion water conservancy capital construction and dozer; The layout that helps the articulated steering system, balance car load counterweight; Help the configuration of power system.In order to realize this purpose, arrange the takeoff output mouth more than 3, mainly contain change speed gear box takeoff output mouth, two takeoff output mouths of drop-gear box, hydraulic power delivery port.Horizontal diesel powered transmission distance is short, and the direction unanimity improves driving efficiency: because the longitudinal space that horizontal diesel engine takies is little, greatly limit has shortened the longitudinal space of machinery space, reach car load lightly, flexible operation.
2. the formula of bowing fluid-link steering: pivot stud power is little, and turn radius is little, thereby has overcome owing to oversize tyre influences the turn radius angle, turns to flexibly, turns to ride comfort good.
3. front and back wheel footpath size is identical, four wheel drive: four-wheel drive tractor employing front and back wheel footpath is identical, the novel front driving axle of intermediate arrangement transmission shaft (little speed ratio main gear, anti-slip differential lock), make the crack, agronomy ground and the front wheel angle of propons increase to close height of back-wheel drive trac. and corner, add and adopt fluid-link steering and wide-section tyre, make the traction adhesion value, the manoevreability of crossing ability greatly improves in the ranks.It is not only applicable to general farming on soft, the slowly drained soil, and is applicable to intertillage, paddy-field-working and band frontloader, harvesting machinery operation.Four-wheel drive tractor can alleviate soil packing, and the slip loss of four-wheel drive tractor is little, and weight distribution is even, can improve the sponginess of soil in the rut, helps protecting the crumb structure of soil.Four-wheeled tractor band front and rear suspension, front and back power take-off shaft and the output of front and back hydraulic pressure also are the new developments of trac. overall structure form.
Description of drawings
Fig. 1 is the facade structures scheme drawing that the utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac..
Fig. 2 is the schematic top plan view of Fig. 1.
Among the figure: 1-diesel engine, 2-driving pulley, 3-belt, 4-driven pulley, 5-change speed gear box, 6-auxiliary gear box, 7-braking hub, 8-back vehicle frame, 9-vertical axes, 10-front vehicle frame, 11-horizontal shaft, 12-front side road wheel, 13-propons, 14-preceding diff, 15-back diff, 16-back axle, 17-rear side universal coupling group, 18-auxiliary gear box output shaft, 19-hydraulic pressure power takeoff, 20-transmission shaft I, 21-takeoff output drop-gear box, 22-rear power output shaft, 23-drive sprocket, 24-chain, 25-driven sprocket, 26-transmission shaft II, 27-little drive sprocket, 28-chain, 29-principal and subordinate movable sprocket, 30-transmission shaft III, 31-turner, 32-preceding power output sprocket, 33-preceding power take-off shaft, 34-I class trifilar suspension assembly, 35-turn to oil cylinder, 36-front side universal coupling group, 37-rear side road wheel.
The specific embodiment
The utility model will be further described below in conjunction with accompanying drawing.
As shown in drawings, the utility model four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., it comprises the back axle 16 of propons 13, the band back diff 15 of diff 14 before front vehicle frame 10, back vehicle frame 8, the band, two front side road wheels 12 and two rear side road wheels 37, and the back axle 16 and the rear side road wheel 37 of diesel engine 1, change speed gear box 5, auxiliary gear box 6, braking hub 7, takeoff output drop-gear box 21, band back diff 15 is installed on the vehicle frame 8 of back; Propons 13, the front side road wheel 12 of turner 31, the preceding diff 14 of band are installed on the front vehicle frame 10; Front vehicle frame 10 is hinged through vertical axis 9 with back vehicle frame 8, be equipped with between back vehicle frame 8 and the propons 13 and turn to oil cylinder 35, driving pulley 2 on diesel engine 1 output shaft is connected with driven pulley 4 on change speed gear box 5 input shafts through belt 3, the output shaft of change speed gear box 5 connects the input shaft of auxiliary gear box 6, the front end of auxiliary gear box output shaft 18 connects the preceding diff 14 of propons 13 through front side universal coupling group 36, the center of front side universal coupling group 36 overlaps substantially with the axle center of vertical axes 7, the rear end of auxiliary gear box output shaft 18 is diff 15 behind rear side universal coupling group 17 connection back axles 16, to drive four road wheels, tween drive shaft one end of auxiliary gear box 6 is equipped with braking hub 7, to realize braking during standstill; Driven pulley 4 built-in clutch also connect transmission shaft I 20, and the other end of transmission shaft I 20 connects takeoff output drop-gear box 21, and rear power output shaft 22 1 ends of takeoff output drop-gear box 21 are realized the back takeoff output; Rear power output shaft 22 other ends of takeoff output drop-gear box 21 are equipped with drive sprocket 23, drive sprocket 23 is connected through the driven sprocket 25 of chain 24 with transmission shaft II 26 1 ends, transmission shaft II 26 is vertically installed along back vehicle frame 8, the little driven sprocket 29 of the little drive sprocket 27 of transmission shaft II 26 other ends on the transmission shaft III 30 of chain 28 and turner 31 is connected, just the power turnover can be passed to the preceding power take-off shaft 33 of turner 31, the preceding power take-off shaft 33 of turner 31 is takeoff output through preceding power output sprocket 32 is connected realization with outfitting tool before.Hydraulic pressure power takeoff 19 is installed on the change speed gear box 5, and the gear of hydraulic pressure power takeoff 19 links to each other with the gear of change speed gear box 5, to obtain hydraulic power, offers hydraulic actuator.
Diesel engine of the present utility model is that rearmounted traverse is arranged vertical, placed in the middle layout that change speed gear box is; The transmission shaft I is passed below diesel engine 1 oil pan tray.Auxiliary gear box 6 by support with change speed gear box 5 be installed in the back vehicle frame 8 on, its input shaft links to each other by spline pair or coupler with the output shaft of change speed gear box 5, be positioned at afer bay 8 above.Back axle 16 is built-in with hub type brake with rear side road wheel 37 wheel hub coupling ends.Below front vehicle frame 10, be hinged with the propons 13 of the preceding diff 14 of band by horizontal shaft 11.At the two ends of propons 13 and back axle 16, two front side road wheels 12 and two rear side road wheels 37 are housed respectively, the four-wheel diameter is identical, can exchange front and back.
The utility model is equipped with the lift system that I class standard trifilar suspension assembly 34, lift arm assemblies, elevating ram etc. are formed in the back of back vehicle frame 8, and the agricultural machinery and implement of employing standard I class standard trifilar suspension can be installed, and it is supporting to be convenient to market.
The utility model is equipped with the hydraulic actuator that elements such as fuel tank, Hydraulic Pump and maneuvering valve are formed on the vehicle frame 8 of back, wherein Hydraulic Pump is connected with hydraulic pressure power takeoff 19 on being installed in change speed gear box 5, so that the hydraulic power of hydraulic actuator is delivered to the hydraulic actuator of fluid-link steering oil cylinder 35 and other operation part.
The utility model also is equipped with open type (or closed) operator's compartment of being made up of two (or single) row seat, steering unit, electric apparatus etc. on afer bay 8, satisfy the operating needs of different facility.
The attainable power transmission route of the utility model is as follows:
1, first direction takeoff output, use for driving: diesel engine 1 drives driving pulley 2, drive driven pulley 4 by belt 3, built-in clutch in the driven pulley 4, behind the clutch engagement, power reaches the auxiliary gear box input shaft that links to each other with change speed gear box 5 through output shaft of gear-box, again through auxiliary gear box output shaft 18 transfers to forward and backward vehicle bridge, output shaft links to each other with the diff of forward and backward vehicle bridge by the universal coupling group respectively, thus four wheel drive before and after realizing.Auxiliary gear box 6 tween drive shafts one end is equipped with braking hub 7, realizes braking during standstill.
2, second direction takeoff output, back takeoff output: diesel engine 1 drives driving pulley 2, drive the driven pulley 4 of built-in clutch by belt 3, through transmission shaft I 20 transmission of power is arrived takeoff output drop-gear box 21, behind the deceleration shift, power reaches rear power output shaft 22, realizes the back takeoff output.
3, the third direction takeoff output, preceding takeoff output: diesel engine 1 drives driving pulley 2, drive the driven pulley 4 of built-in clutch by belt 3, through transmission shaft I 20 with transmission of power to takeoff output drop-gear box 21, behind the deceleration shift, transmission of power is to rear power output shaft 22, drive sprocket 23 by rear power output shaft 22 other ends drives the driven sprocket 25 that is installed in transmission shaft II 26 1 ends through chain 24 again, power reaches the little drive sprocket 27 that is installed in transmission shaft II 26 other ends through transmission shaft II 26, drive little driven sprocket 29 on the transmission shaft III 30 that is installed in turner 31 through chain 28 again, after the turnover speed change, transmission of power to preceding power take-off shaft 33, is connected with outfitting tool by sprocket wheel 32.
4, the four directions is to takeoff output, the hydraulic pressure delivery port: hydraulic pressure power takeoff 19 is fixedly mounted on the change speed gear box 5, the gear of hydraulic pressure power takeoff 19 links to each other with the gear of change speed gear box 5, obtains hydraulic power, thereby hydraulic power is delivered to the hydraulic actuator of fluid-link steering oil cylinder 35 and other operation part.
Below be the characteristics that the utility model product has:
(1) the utility model product is researched and developed at present southern landform present situation and client's demand, south road mire in rainy season, and the tractor-ploughing road is poor, undulating topography, the cultivated land area is little, with a varied topography.And the performance characteristics of the utility model product and preceence are: have and draw tack, road-holding property and manoevreability preferably, higher hillside fields job stabilization and crossing ability are arranged, can alleviate soil packing, thereby can solve problems such as general trac. landform comformability is relatively poor, for the peasant provides a kind of landform comformability good, safe and reliable farm machinery.
(2) the front and back wheel diameter of the utility model product is identical, and the formula of bowing turns to, and synchronism is good, the sync rates height, through performance and hill climbing ability are superior, and turn radius is little, high efficiency, and parts depreciation is little, fuel oil is fully used, operation easily, convenient and efficient, low-carbon energy-saving environmental protection.
(3) this product can conveniently be connected with multiple agricultural middle-size and small-size mechanized equipment such as rice harvester, rice transplanter, underwater cultivation machine, dry farming machine, rice mill, forage grass comminutor, spraying machine, irrigation sprinkler, sugarcane planting machine, sugarcane cultivator-cumridger by expansion, is applied to industries such as processing of farm products, plant protection, agricultural crops farming, drought resisting, rice harvesting, rice transplanting, cane planting and cultivation and banking, orchard management and short distance carrying.
(4) this product can be installed the irrigation and water conservancy Work machine by expansion, as loader, excavating machine etc., can be used for operations such as the farmland ditching is fetched earth, capital construction, road performance.
Claims (7)
1. the four wheel drive formula of bowing turns to the high-mobility, multipurpose, wheeled vehicle trac., comprise the propons (13) of front vehicle frame (10), back vehicle frame (8), the preceding diff (14) of band, back axle (16), two front side road wheels (12) and two rear side road wheels (37) of band back diff (15), it is characterized in that, diesel engine (1), change speed gear box (5), auxiliary gear box (6), braking hub (7), takeoff output drop-gear box (21), back axle (16) and rear side road wheel (37) are installed on the back vehicle frame (8); Turner (31), propons (13) and front side road wheel (12) are installed on the front vehicle frame (10); Front vehicle frame (10) is hinged through vertical axis (9) with back vehicle frame (8), be equipped with between back vehicle frame (8) and the propons (13) and turn to oil cylinder (35), driving pulley (2) on diesel engine (1) output shaft is connected with driven pulley (4) on change speed gear box (5) input shaft through belt (3), the output shaft of change speed gear box (5) connects the input shaft of auxiliary gear box (6), the two ends of auxiliary gear box output shaft (18) respectively through the universal coupling group with before, the diff of back axle connects, to drive four road wheels, tween drive shaft one end of auxiliary gear box (6) is equipped with braking hub (7), to realize braking during standstill; Described driven pulley (4) built-in clutch also connects transmission shaft I (20), and the other end of transmission shaft I (20) connects takeoff output drop-gear box (21), and rear power output shaft (22) one ends of takeoff output drop-gear box (21) are realized the back takeoff output; Rear power output shaft 22 other ends of takeoff output drop-gear box (21) are equipped with drive sprocket (23), drive sprocket (23) is connected with the driven sprocket (25) of transmission shaft II (26) one ends through chain (24), transmission shaft II (26) is vertically installed along the back vehicle frame, the little driven sprocket (29) of the little drive sprocket (27) of transmission shaft II (26) other end on the transmission shaft III (30) of chain (28) and turner (31) is connected, the preceding power take-off shaft (33) of turner (31) through preceding power output sprocket (32) be connected with outfitting tool realize before takeoff output.
2. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, hydraulic pressure power takeoff (19) is installed on the described change speed gear box (5), the gear of hydraulic pressure power takeoff (19) links to each other with the gear of change speed gear box (5), to obtain hydraulic power, offer hydraulic actuator.
3. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, described diesel engine (1) is that rearmounted traverse arranges that change speed gear box (5) is vertical, placed in the middle layout; Transmission shaft I (20) is passed below diesel engine (1) oil pan tray.
4. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, described front side road wheel (12) is identical with the diameter of rear side road wheel (37), can exchange front and back.
5. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, the center of diff (14) the bonded assembly universal coupling group of described and propons (13) overlaps substantially with the axle center of vertical axes (7).
6. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, I class standard trifilar suspension assembly (34) is installed in the back of afer bay (8).
7. turn to the high-mobility, multipurpose, wheeled vehicle trac. according to the described four wheel drive formula of bowing of claim 1, it is characterized in that, below the mmi machine frame (10), be hinged with the propons (13) of band diff (14) by horizontal shaft (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320115731 CN203093741U (en) | 2013-03-14 | 2013-03-14 | Four-wheel drive bowing type steering multi-purpose tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320115731 CN203093741U (en) | 2013-03-14 | 2013-03-14 | Four-wheel drive bowing type steering multi-purpose tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203093741U true CN203093741U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320115731 Withdrawn - After Issue CN203093741U (en) | 2013-03-14 | 2013-03-14 | Four-wheel drive bowing type steering multi-purpose tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203093741U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144539A (en) * | 2013-03-14 | 2013-06-12 | 广西澜光科技有限公司 | Four-wheel-drive bow-type steering multipurpose tractor |
| CN103723037A (en) * | 2013-12-18 | 2014-04-16 | 刘光兵 | Articulated tractor head and tractor with same |
| CN104141740A (en) * | 2014-07-24 | 2014-11-12 | 广西澜光科技有限公司 | Tractor transfer case |
| CN104149609A (en) * | 2014-07-29 | 2014-11-19 | 柳州市宏大机械制造有限公司 | Tractor |
| CN104163102A (en) * | 2014-07-29 | 2014-11-26 | 柳州市宏大机械制造有限公司 | Mechanical walking driving device of tractor |
-
2013
- 2013-03-14 CN CN 201320115731 patent/CN203093741U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103144539A (en) * | 2013-03-14 | 2013-06-12 | 广西澜光科技有限公司 | Four-wheel-drive bow-type steering multipurpose tractor |
| CN103144539B (en) * | 2013-03-14 | 2015-07-08 | 广西澜光科技有限公司 | Four-wheel-drive bow-type steering multipurpose tractor |
| CN103723037A (en) * | 2013-12-18 | 2014-04-16 | 刘光兵 | Articulated tractor head and tractor with same |
| CN104141740A (en) * | 2014-07-24 | 2014-11-12 | 广西澜光科技有限公司 | Tractor transfer case |
| CN104149609A (en) * | 2014-07-29 | 2014-11-19 | 柳州市宏大机械制造有限公司 | Tractor |
| CN104163102A (en) * | 2014-07-29 | 2014-11-26 | 柳州市宏大机械制造有限公司 | Mechanical walking driving device of tractor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130731 Effective date of abandoning: 20150708 |
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| RGAV | Abandon patent right to avoid regrant |