CN2917234Y - Maize harvester - Google Patents
Maize harvester Download PDFInfo
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- CN2917234Y CN2917234Y CN 200620030758 CN200620030758U CN2917234Y CN 2917234 Y CN2917234 Y CN 2917234Y CN 200620030758 CN200620030758 CN 200620030758 CN 200620030758 U CN200620030758 U CN 200620030758U CN 2917234 Y CN2917234 Y CN 2917234Y
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Abstract
The utility model relates to a corn harvester, which comprises a fruit picker and a stem crushing device. The fruit picker is driven by the motor of the tractor by a gearbox. The gear box is comprised of an input shaft, an output shaft and a spline output shaft; Wherein the input shaft is driven by the motor, the output shaft is used for driving fruit conveyor, and the spline output shaft with the spline structure in the fruit picker is connected with the drive fruit picker through spline transmission. The stem crushing device comprises a gearbox, a dynamic cutter and a static cutter. The dynamic cutter is installed on the vertical and rotatory output shaft of the gearbox, and rotatable blades are arranged averagely along interval of spiral line on the dynamic cutter, with all shades of the rotatable blades are allocated in an enclosure circle on section of the dynamic cutter. By driving the fruit picker and crushing device by two gearboxes, the utility model exhibits compact structure, direct and convenient power transmission, high efficiency and good lubrication status as well as reduced power stop resistance, low power consumption, short stem after chopping, good effect of the stem returning to filed, and symmetric operation of crushing and stable cleaning.
Description
Technical field
The utility model relates to the maize harvesting machine that a kind of and tractor use, and especially a kind ofly once finishes the maize harvesting machine of operations such as plucking fringe and crushed stalk to walk mode certainly.
Background technology
At present, using more widely, the small-sized corn reaping machine mainly comprises supporting ear-picking unit, fringe conveying plant, Ji Suicang and the straw millstone that is installed on the wheel tractor, wherein, ear-picking unit and Ji Suicang are installed in the front-end and back-end of tractor respectively, one end of fringe conveying plant links to each other with the conveyer in the ear-picking unit, the other end links to each other with Ji Suicang, and straw millstone is installed in the below, rear end of tractor.In above-mentioned each device, motion is many, except straw reducing mechanism and fringe conveying plant, on ear-picking unit, also have left and right two intake mechanisms and moving components such as left and right two groups of snapping bars and conveyer, each intake mechanism all has left and right two rice-pulling chains.Disperse because these motions and moving component are provided with on reaping machine relatively, its movement velocity and direction also are not quite similar, and make that the power drive system of reaping machine is comparatively complicated.With regard to ear-picking unit, power is from tractor engine each moving component on it, all power transmission and speed change, commutation and each execution unit are all concentrated and are fitted together, dispose huger, transmission chain length, cause not only that transmission efficiency is low, weight is big, and make the general assembly production of ear-picking unit and user and the scene of supporting tractor install and working service all inconvenient; In addition, be open type from engine to the speed change running part the active snapping bar, the working environment of transmission and lubrication state thereof all compare badly, correspondingly must shorten the service life of equipment.
In existing maize harvesting machine power consumption, the power that the crushed stalk operation consumes is maximum relatively.The following two kinds of versions of the many employings of crushing part in the current straw millstone, a kind of is hammer pawl formula or Y shape cutter formula, the cutting edge of these two kinds of crushing parts is all more blunt, stalk can only be smashed or tear up, rather than cutting, so power consumption is bigger, add operations such as plucking fringe, conveying, cause the tractor dynamic power unbalanced supply-demand; Another kind is to adopt horizontal hobboing cutter operating type, promptly adorn the roll blade of some at horizontal rotating shaft upper edge axial screw line cloth, this operating type can produce a plurality of sections in the moment of cutting off, promptly have many roll blade to be arrived stalk simultaneously, and be to shred stalk in the mode of planing, produced bigger cut-out resistance along the direction of straw fiber, so power consumption is also very big, simultaneously hobboing cutter can not fast rotational, and is longer to the chopping length that makes straw, about 15cm; Overhead nearer when hobboing cutter is worked in addition, occur easily beating native phenomenon, the hobboing cutter rotating speed is further reduced, the phenomenon that stalks cutting is not thorough, shred the qualification rate reduction appears, directly influenced field effect.In addition, the reducing mechanism of above-mentioned two kinds of structures is the stalk on top all to pieces generally, in a single day cutter buries and impacts the root stubble, power consumption will rise suddenly, so under the restriction of tractor power, two functions of crushed stalk and stubble-cleaning can not once be finished, but if do not carry out the stubble-cleaning operation, will influence the sowing of following batch crops again.
The utility model content
The purpose of this utility model is to provide a kind of ear-picking unit and supporting dilatory function conveniently promptly to carry out the maize harvesting machine field-installed, that gear lubrication is good.
For achieving the above object, the technical solution of the utility model is to have adopted a kind of maize harvesting machine, the frame 2 and the engine that comprise tractor, on frame 2, be equipped with by engine-driven ear-picking unit 1, straw reducing mechanism and fringe conveying plant 10, ear-picking unit 1 comprises initiatively snapping bar and rice-pulling chain 113, engine drives ear-picking unit 1 and fringe conveying plants 10 by a gearbox 3, and gearbox 3 comprises the casing 301 that is installed in frame 2 and by engine-driven power shaft 302, and be used for driving fringe conveying plant 10 output shaft 303 and with the active snapping bar with spline structure of ear-picking unit 1 spline output shaft 304 by the spline driving coupling; In the gearbox 3, power shaft 302 is by speed change intermediate gear driving coupling output shaft 303 and spline output shaft 304.
The prime driving-chain of rice-pulling chain 113 is a commutator 111, this commutator comprises housing 202, be rotatablely equipped with mutually perpendicular splined shaft 201 and power transmission shaft 203 on the housing, connect by Bevel Gear Transmission between the diaxon, splined shaft receives prime power by the spline driving coupling, and power transmission shaft drives rice-pulling chain.
The straw reducing mechanism comprises the actuating unit that is installed on frame 2, actuating unit comprise by engine-driven power shaft 902 and by power shaft 902 by change-speed gearing output shaft 907 that drive, vertical rotating, be fixed with moving knife 909 on the output shaft 907, the radial direction of moving knife upper edge output shaft 907 is provided with a slice or a slice rotary-cut sheet 911 above, crosscut, one side of contiguous moving knife is provided with the static stationary knife of relative moving knife 912, and the position of corresponding rotary-cut sheet 911 is provided with the cutter groove that is used for the spinning in and out of rotary-cut sheet on the stationary knife.
Described moving knife 909 comprises cylindric or has the column cutter hub of just polygon rib, and described rotary-cut sheet 911 is all put at the cutter hub outer surface along pitch, and the position of corresponding each rotary-cut sheet is equipped with the cutter groove on the stationary knife 912.All rotary-cut sheets are distributed on the closed circular in the projection on the cutter hub cross section.
Actuating unit is a gearbox 9, and gearbox 9 comprises casing 901, and power shaft 902 laterally is threaded onto the top of casing 901, and gearbox 9 exposes outstanding being contained on the frame 2 in two ends of casing 901 by power shaft 902; Between casing 901 and frame 2, also be provided with the take-off and landing device 914 that casing 901 is turned an angle around power shaft 902.
Also be provided with a power transmission shaft 904 parallel with power shaft 902 in the bottom of casing 901, the two ends of stretching out the power transmission shaft of casing 901 are in the auxiliary box body 905 that is installed in casing 901 both sides, output shaft 907 has two, is separately positioned on the auxiliary box body 905 of casing 901 both sides; Power shaft 902 drives power transmission shaft 904 by gear drive, and power transmission shaft 904 drives respectively on 907, two output shafts 907 of corresponding output shaft by the bevel gear of being located at its two ends moving knife 909 all is housed; Stationary knife 912 is located between two moving knife, and the both sides of relative two moving knife are equipped with the cutter groove on the stationary knife 912.
Also being provided with between casing 901 and auxiliary box body 905 and making auxiliary box body 905 and moving knife 909 integral body is the angle-adjusting mechanism 913 that the relative casing 901 in center rotates to an angle with power transmission shaft 904, and stationary knife 912 is installed on the auxiliary box body 905.
Described angle-adjusting mechanism 913 is location axle sleeves that one one end has flange, and an end of location axle sleeve connects casing 901, and the other end connects auxiliary box body 905, and the locating shaft cover has on the end of flange and offers arc groove; Described take-off and landing device 914 is for being arranged on the hydraulic jack between casing 901 tops and the frame 2, and its oil-in and control valve are connected with the hydraulic system of tractor.
The utility model improves power drive system traditional in the ears picking device of corn harvester, the motivation transfer motion part of engine in the existing reaping machine to the open type of snapping bar is integrated in the gearbox, discretely from ear-picking unit come out and become independently parts, the product and the production structure of maize harvesting machine have been optimized, alleviated the weight and volume of ear-picking unit, be convenient to its general assembly and produce, store, transport the installation that reaches with supporting tractor; After the improvement, it is closed lubricated to adopt lubricating grease/oil to carry out in the gearbox, and the working environment of transmission is improved, and has prolonged its working life and maintenance period, and the consumer can directly be benefited.The output shaft of gearbox directly drives the fringe conveying plant, the spline output shaft then directly provides power and angular speed in the mode of splined to ear-picking unit with snapping bar initiatively, and power transmission is convenient, directly, compact conformation, transmission efficiency height, mounting process requirement simultaneously is low, and easy accessibility is simple.The packaging technology of ear-picking unit has been simplified in the design of commutator in the ear-picking unit, has reduced the loss of its transmission power, and the unloaded power of ear-picking unit needs 1.5kw before the design, and it only is 0.3kw that the unloaded power demand in back is installed.
The utility model also improves power transmission mode, grinding mode and the crushing part of maize harvesting machine straw millstone, change original horizontal rolling cut mode into vertical rotary-cut mode, like this in the crushed stalk process, the rotary-cut sheet is to cut off with the direction of straw fiber sidewards basically, cut off resistance and obviously reduce, cut off power consumption and greatly reduce.Moving knife adopt the column cutter hub and with the rotary-cut sheet along the uniform frame mode of helix, the rotary-cut sheet is implemented to cut off to straw successively continuously, and moment has only a section once each cutting moving knife, make moving knife whole stressed reasonable and balanced, resistance is little, thereby moving knife can fast rotational, has further reduced the chopping length of straw, the shortest 4cm that reaches, field effect is remarkable.Reducing mechanism has adopted the gearbox transferring power, makes the structure of reducing mechanism compact more, and power transmission is convenient directly, and it is closed lubricated to use machine oil to carry out simultaneously, has thoroughly improved the working environment of transmission, has prolonged its working life significantly.Moving knife is directly installed on the output shaft of gearbox, is convenient to user's loading and unloading, maintenance.In addition, also be provided with the angle-adjusting mechanism that is used to adjust the moving knife angle of inclination on the reducing mechanism, can make moving knife inclination certain angle, making bottom, the point of a knife of a rotary-cut sheet is lower than the cutter hub certain altitude, because every only have a section when moving knife is cut, so following rotary-cut sheet just can in depth be implemented cutting down, and can not cause too big influence to the dynamical system of tractor, thereby realized carrying out synchronously of corn stalk pulverizing, stubble-cleaning operation, stubble-cleaning is thorough, helps sowing, the growth of following batch crops.Straw millstone stretches out gearbox body by its power shaft two ends are connected with tractor, and adopt with gearbox around the mode of its power shaft rotation moving knife that rises and falls, in the process of rising and falling, the centre-to-centre spacing of power shaft and gear box of tractor belt pulley remains constant, has guaranteed that its driving belt can not come off.
From the test result of maize harvesting machine overall operation that the utility model is provided, unit is 3.1 mu of harvesting corns per hour, 3 liters of oil consumptions, the as seen superiority of its performance.
Description of drawings
Fig. 1 is the structural representation of the utility model complete machine;
Fig. 2 is the utility model power matching system schematic diagram;
Fig. 3 is the gearbox designs schematic diagram of the ear-picking unit in the utility model;
Fig. 4 is an A-A cutaway view among Fig. 3;
Fig. 5 is the structural representation of commutator;
Fig. 6 is the structural representation of straw reducing mechanism;
Fig. 7 is the B-B cutaway view of Fig. 6;
Fig. 8 is the left view of Fig. 6;
Fig. 9 is adjusted into the schematic diagram of heeling condition for moving knife;
Figure 10 is the C-C profile of part 913 among Fig. 6.
Embodiment
A kind of maize harvesting machine shown in Figure 1, be separately installed with ear-picking unit 1 and collection fringe storehouse 11 in the front-end and back-end of wheel tractor frame 2, one end of fringe conveying plant 10 links to each other with conveyer in the ear-picking unit 1, the other end links to each other with collection fringe storehouse 11, and straw millstone is installed in the below, rear end of tractor.
Fig. 3, shown in Figure 4, gearbox 3 comprises casing 301, the power shaft 302 that is used to be packed on the fixed head 2a and is used to the spline output shaft 304 that drives the output shaft 303 of fringe conveying plant and be used to drive ear-picking unit 1, the output of spline output shaft 304 is the internal spline structure, can be connected with the male splined shaft assembling of drive roll, gearbox 3 drives ear-picking unit 1 in the mode of spline driving coupling; In the gearbox 3, power shaft 302 is by speed change intermediate gear driving coupling output shaft 303 and spline output shaft 304.
Power transmission process in gearbox 3 and the ear-picking unit 1 is as follows:
See Fig. 2, engine belt pulley 6 drives the power shaft 302 of gearbox 3 by belt 5, the output shaft 303 of gearbox 3 is by the conveyer belt 10a of chain drive 4, axle 4a driving fringe conveying plant 10, and axle 4a drives splined shafts 116 by chain drive 115, and a commutator 111 is respectively installed at the two ends of axle 116.
The output shaft 304 of gearbox 3 drives initiatively snapping bar 101 by splined, initiatively snapping bar 101 drives snapping bar 102 by gear drive, initiatively snapping bar 101 drives snapping bar 103 by chain drive 120, snapping bar 103 drives snapping bar 104 by gear drive, snapping bar 104 is again by gear drive axle 105, one end of axle 105 is installed commutator 111, and the other end drives the conveyer belt 106 of conveyer; Initiatively snapping bar 101 is by gear drive driving shaft 110, and an end of axle 110 is installed commutator 111.The drive sprocket 108 of rice-pulling chain 113 is installed on the output shaft of commutator 111, is driven rice-pulling chain 113 work.
Shown in Fig. 6,7,8,10, the straw reducing mechanism comprises take-off and landing device 914, gearbox 9, moving knife 909 and stationary knife 912, and gearbox 9 comprises power shaft 902 and power transmission shaft 904; Shown in Fig. 2, tractor engine belt pulley 6 drives gear box of tractor by belt transmission 7, and gear box of tractor belt pulley 8 drives the power shaft 902 of gearbox 9 by belt transmission 12.Power shaft 902 laterally is threaded onto the top of casing 901, and gearbox 9 exposes outstanding being contained on the frame 2 in two ends of casing 901 by power shaft 902; Power transmission shaft 904 is installed in the bottom of casing 901, and parallel with power shaft 902, casing 901 is stretched out at the two ends of power transmission shaft 904, is in the auxiliary box body 905 that is installed in casing 901 both sides, the output that is respectively equipped with 907, two output shafts 907 of output shaft on two auxiliary box bodies all is equipped with moving knife 909; Power shaft 902 drives power transmission shaft 904 by gear drive, and power transmission shaft 904 drives corresponding output shaft 907 respectively by the bevel gear of being located at its two ends again.Take-off and landing device 914 adopts hydraulic jack to be arranged between casing 901 tops and the frame 2, and its oil-in and control valve are connected with the hydraulic system of tractor, and control valve is installed on the control handwheel of tractor; When comminution process is finished, connect control valve, jack is ejected, driving casing 901 by the connection ear 915 of being located at casing 901 tops rotates around power shaft 902, when going to certain angle, moving knife 909 just rises enough height, in order to avoid moving knife 909 is damaged in the tractor traveling process.
Moving knife 909 comprises cylindric cutter hub, on the cutter hub face of cylinder from top to bottom along the uniform rotary-cut sheet of pitch, and all radially outward be provided with to realize the crosscut function along cutter hub, in order to guarantee moving knife stress balance in the course of the work, all rotary-cut sheets preferably are distributed on the closed circular in the projection on the cutter hub cross section; In addition, cutter hub also can be designed to have the column cutter hub of just polygon rib, at this moment in order to make all rotary-cut sheets have consistent cut coverage and moving knife in rotary course, to keep balance, the rotary-cut sheet should be distributed on the same face of cylinder, and satisfies two uniform requirements of above-mentioned cylindric cutter hub rotary-cut sheet simultaneously.Stationary knife 912 is installed on the auxiliary box body 905, the stationary knife tool rest along movable arbor to, be located between two moving knife, be equipped with the cutter groove that is used for the spinning in and out of rotary-cut sheet in the relevant position of each rotary-cut sheet on the both sides of stationary knife 912 relative two moving knife, the ledger-plate that cooperates cutting with moving knife is housed on the cutter groove.When practical application, if do not need crushing straw, but only stalk is cut off, on cutter hub, preferably in the bottom of cutter hub or the lower end rotary-cut sheet is installed can be achieved the goal.
Being provided with between casing 901 and auxiliary box body 905 and making auxiliary box body 905 and moving knife integral body is the angle-adjusting mechanism 913 that the relative casing 901 in center rotates to an angle with power transmission shaft 904, this mechanism is a location axle sleeve, the one end connects casing 901, the other end connects auxiliary box body 905, on having an end of flange, it offers the arc groove (see figure 10), be used to adjust auxiliary box body 905 and moving knife 909, the angle of inclination of stationary knife 912 relative casings 901, purpose is to make moving knife axis and ground form certain angle, making bottom, the point of a knife of a rotary-cut sheet 911 is lower than cutter hub certain altitude (see figure 9), the rotary-cut sheet of bottom can in depth be implemented cutting down during work, the realization corn stalk is pulverized, stubble-cleaning carries out synchronously, stubble-cleaning is thorough, help the sowing of following batch crops, growth, moving knife can be chopped it off at the underground 1-5cm of straw root place.
The course of work of complete machine is as follows:
1. the direction that follows of maize harvesting machine is advanced, and under the effect of ear-picking unit intake mechanism, the corn knob bar is imported to respectively in the middle of the snapping bar of the left and right sides, and under the screw extrusion of snapping bar, finishes the fringe work of plucking;
2. corncob is slipped on the conveyer under the effect of gravity, is sent to the fringe conveying plant, concentrates and takes in the collection fringe storehouse, finishes the work of collection fringe;
3. the corn straw of having plucked fringe after the rotary-cut sheet of straw reducing mechanism arrives, pulled into and stationary knife between, pulverize fully, shed in the fields, finish stalk crushing and returning work.
Claims (9)
1. maize harvesting machine, the frame (2) and the engine that comprise tractor, on frame (2), be equipped with by engine-driven ear-picking unit (1), straw reducing mechanism and fringe conveying plant (10), ear-picking unit (1) comprises initiatively snapping bar and rice-pulling chain (113), it is characterized in that: engine drives ear-picking unit (1) and fringe conveying plant (10) by a gearbox (3), and gearbox (3) comprises the casing (301) that is installed in frame (2) and by engine-driven power shaft (302), and be used for driving fringe conveying plant (10) output shaft (303) and with the active snapping bar with spline structure of ear-picking unit (1) spline output shaft (304) by the spline driving coupling; In the gearbox (3), power shaft (302) is by speed change intermediate gear driving coupling output shaft (303) and spline output shaft (304).
2. maize harvesting machine according to claim 1, it is characterized in that: the prime driving-chain of rice-pulling chain (113) is commutator (111), this commutator comprises housing (202), be rotatablely equipped with mutually perpendicular splined shaft (201) and power transmission shaft (203) on the housing, connect by Bevel Gear Transmission between the diaxon, splined shaft receives prime power by the spline driving coupling, and power transmission shaft drives rice-pulling chain.
3. maize harvesting machine according to claim 1, it is characterized in that: the straw reducing mechanism comprises the actuating unit that is installed on frame (2), actuating unit comprises by engine-driven power shaft (902), and drive by change-speed gearing by power shaft (902), the output shaft of vertical rotating (907), be fixed with moving knife (909) on the output shaft (907), the radial direction of moving knife upper edge output shaft (907) is provided with more than a slice or a slice, the rotary-cut sheet (911) of crosscut, one side of contiguous moving knife is provided with the static stationary knife of relative moving knife (912), and the position of corresponding rotary-cut sheet (911) is provided with the cutter groove that is used for the spinning in and out of rotary-cut sheet on the stationary knife.
4. maize harvesting machine according to claim 3, it is characterized in that: described moving knife (909) comprises cylindric or has the column cutter hub of just polygon rib, described rotary-cut sheet (911) is all put at the cutter hub outer surface along pitch, and the position that stationary knife (912) is gone up corresponding each rotary-cut sheet is equipped with the cutter groove.
5. maize harvesting machine according to claim 4 is characterized in that: all rotary-cut sheets are distributed on the closed circular in the projection on the cutter hub cross section.
6. according to claim 3 or 4 or 5 described maize harvesting machines, it is characterized in that: actuating unit is a gearbox (9), gearbox (9) comprises casing (901), power shaft (902) laterally is threaded onto the top of casing (901), and gearbox (9) exposes outstanding being contained on the frame (2) in two ends of casing (901) by power shaft (902); Between casing (901) and frame (2), also be provided with the take-off and landing device (914) that casing (901) is turned an angle around power shaft (902).
7. maize harvesting machine according to claim 6, it is characterized in that: also be provided with a power transmission shaft (904) parallel in the bottom of casing (901) with power shaft (902), the two ends of stretching out the power transmission shaft of casing (901) are in the auxiliary box body (905) that is installed in casing (901) both sides, output shaft (907) has two, is separately positioned on the auxiliary box body (905) of casing (901) both sides; Power shaft (902) drives power transmission shaft (904) by gear drive, and power transmission shaft (904) drives corresponding output shaft (907) respectively by the bevel gear of being located at its two ends, and moving knife (909) all is housed on two output shafts (907); Stationary knife (912) is located between two moving knife, and the both sides that stationary knife (912) is gone up relative two moving knife are equipped with the cutter groove.
8. maize harvesting machine according to claim 7, it is characterized in that: be provided with also between casing (901) and auxiliary box body (905) that to make auxiliary box body (905) and moving knife (909) whole be the angle-adjusting mechanism (913) that the relative casing in center (901) rotates to an angle with power transmission shaft (904), stationary knife (912) is installed on the auxiliary box body (905).
9. maize harvesting machine according to claim 8, it is characterized in that: described angle-adjusting mechanism (913) is the location axle sleeve that one one end has flange, one end of location axle sleeve connects casing (901), the other end connects auxiliary box body (905), and the locating shaft cover has on the end of flange and offers arc groove; Described take-off and landing device (914) is for being arranged on the hydraulic jack between casing (901) top and the frame (2), and its oil-in and control valve are connected with the hydraulic system of tractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620030758 CN2917234Y (en) | 2006-07-20 | 2006-07-20 | Maize harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620030758 CN2917234Y (en) | 2006-07-20 | 2006-07-20 | Maize harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2917234Y true CN2917234Y (en) | 2007-07-04 |
Family
ID=38215036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620030758 Expired - Fee Related CN2917234Y (en) | 2006-07-20 | 2006-07-20 | Maize harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2917234Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103181265A (en) * | 2013-04-03 | 2013-07-03 | 郑青炎 | Corn combine harvester |
| CN107852941A (en) * | 2017-11-13 | 2018-03-30 | 常州美帛纺织品有限公司 | A kind of small-sized forage grass harvesting apparatus and its application process |
-
2006
- 2006-07-20 CN CN 200620030758 patent/CN2917234Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103181265A (en) * | 2013-04-03 | 2013-07-03 | 郑青炎 | Corn combine harvester |
| CN107852941A (en) * | 2017-11-13 | 2018-03-30 | 常州美帛纺织品有限公司 | A kind of small-sized forage grass harvesting apparatus and its application process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070704 Termination date: 20100720 |