CN113973526A - Hydraulic drive boat tractor transmission structure - Google Patents
Hydraulic drive boat tractor transmission structure Download PDFInfo
- Publication number
- CN113973526A CN113973526A CN202111214366.5A CN202111214366A CN113973526A CN 113973526 A CN113973526 A CN 113973526A CN 202111214366 A CN202111214366 A CN 202111214366A CN 113973526 A CN113973526 A CN 113973526A
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- Prior art keywords
- regulating valve
- speed regulating
- wheel
- oil
- valve
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims description 76
- 210000003813 thumb Anatomy 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 52
- 230000008859 change Effects 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 238000003971 tillage Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B51/00—Undercarriages specially adapted for mounting-on various kinds of agricultural tools or apparatus
- A01B51/02—Undercarriages specially adapted for mounting-on various kinds of agricultural tools or apparatus propelled by a motor
Abstract
The invention discloses a hydraulic drive boat tractor transmission structure which comprises a hydraulic drive mechanism and a direction control mechanism, wherein the hydraulic drive mechanism and the direction control mechanism are in transmission connection. The power source of the transmission structure of the hydraulically driven boat tractor is hydraulic oil, moving parts rarely have hard friction during working, and the moving parts are fully lubricated during moving, so that the probability of failure of the parts caused by mechanical wear is reduced, the service life of equipment is prolonged, and the probability of failure of the parts caused by mechanical wear is reduced, so that the after-sale service cost is reduced; meanwhile, the maintenance cost and the maintenance time of equipment users are reduced; the defects of insufficient transmission efficiency, oil consumption, few gears, trouble in speed change and unsafety of the belt-driven tractor-ploughing boat are overcome; compared with a gear-driven boat tractor, the gear-driven boat tractor has the advantages that the step-variable speed is changed into the stepless speed change, and the speed change is light and convenient.
Description
Technical Field
The invention relates to the technical field of boat tractors, in particular to a transmission structure of a hydraulically driven boat tractor.
Background
During the paddy field operation of the boat tractor, the boat body is lubricated by water on the surface of the paddy field by using a floating and sliding working principle, the friction between the boat body and soil is reduced, meanwhile, the lower limit depth of the whole boat in the farmland soil is reduced by using the buoyancy generated by the water of the boat tractor, so that the increase of the running resistance and the working resistance is avoided, then the rotary tillage operation on the paddy field is completed by the suspended rotary tillage device, and the boat tractor achieves great achievement in the aspects of improving the planting quality and the working efficiency in the wide area for planting rice in south China.
Currently, the boat tractor-ploughing sold in society is mainly composed of two mechanisms: firstly, belt transmission and secondly gear transmission.
The belt driven boat tractor is to transmit the power of the power machine to the driving wheel and the rotary cultivator via V-belt speed change. Its advantage is low cost. The belt transmission has the disadvantages of low efficiency, easy slippage of the belt, incapability of fully utilizing the energy of the power machine and high oil consumption. The speed change of the belt drive is achieved by changing the diameter of the pulley. The speed change is very troublesome and unsafe.
The manufacturing cycle of gear transmission is long, the mechanical abrasion is serious, and the service life is influenced. And the after-market costs associated with mechanical wear are high.
Therefore, the market urgently needs to develop a transmission structure of a hydraulically-driven boat tractor to help people solve the existing problems.
Disclosure of Invention
In order to overcome the defects of related products in the prior art, the invention provides a transmission structure of a hydraulically-driven tractor-ploughing boat, which aims to solve the problems that the prior tractor-ploughing boat in the background art has low belt transmission efficiency during work, a belt is easy to slip, the energy of a power machine cannot be fully exerted, the oil consumption is high, the speed change is troublesome, the safety is high, the manufacturing period of gear transmission is long, the mechanical abrasion is serious, the service life is influenced, and the after-sale cost caused by the mechanical abrasion is high.
The invention provides a hydraulic drive boat tractor transmission structure, comprising: the hydraulic driving mechanism and the direction control mechanism are in transmission connection; the hydraulic driving mechanism comprises a power machine, a driving belt pulley, an oil tank, a clutch, a driven belt pulley, a fifth speed regulating valve, a lifting three-position four-way reversing valve, a lifting oil cylinder, a first travelling wheel, a first speed reducer, a first oil motor, a third speed regulating valve, a third oil motor, a fourth speed regulating valve, a second oil motor, a second speed reducer, a second travelling wheel, a second speed regulating valve, a travelling three-position four-way reversing valve, a first speed regulating valve and an oil pump; the power machine is connected with a driving belt pulley, the oil pump is connected with a driven belt pulley, and the driving belt pulley and the driven belt pulley are in transmission connection through a transmission belt; the clutch is arranged between the oil pump and the driven belt pulley, the input end of the oil pump is connected with the oil tank, and the output end of the oil pump is divided into three paths to be respectively connected with the first speed regulating valve, the second speed regulating valve and the fifth speed regulating valve;
the first speed regulating valve is connected with the walking three-position four-way reversing valve, and an output oil path of the walking three-position four-way reversing valve is divided into two branches which are respectively connected with the third speed regulating valve and the fourth speed regulating valve to control walking; the third speed regulating valve, the first oil motor, the first speed reducer and the first travelling wheel are sequentially connected, and the fourth speed regulating valve, the second oil motor, the second speed reducer and the second travelling wheel are sequentially connected;
the second speed regulating valve is connected with a third oil motor, and the third oil motor is connected with a rotary cultivator;
the fifth speed regulating valve is connected with the lifting three-position four-way reversing valve, an output oil path of the lifting three-position four-way reversing valve is connected with a lifting oil cylinder, and the lifting oil cylinder is connected with a lifting mechanism for controlling the lifting of the rotary cultivator.
In some embodiments of the invention, the direction control mechanism comprises an operation table, a soft rubber ring, a knurled idle wheel, an idle wheel bracket, a steering wheel assembly and a knurled knob;
the first speed regulating valve, the second speed regulating valve, the third speed regulating valve, the fourth speed regulating valve, the fifth speed regulating valve, the intermediate wheel bracket and the steering wheel assembly are all arranged on the operating platform; the epaxial cover of steering wheel subassembly is equipped with the steering wheel, the cover is equipped with soft rubber circle on the third governing valve, the cover is equipped with the annular knurl knob on the fourth governing valve, be provided with the annular knurl idle wheel on the idle wheel support, soft rubber circle and annular knurl knob are located the both sides of steering wheel respectively, just the steering wheel through annular knurl idle wheel with soft rubber circle transmission is connected, the steering wheel with annular knurl knob transmission is connected.
In some embodiments of the present invention, the shaft of the steering wheel assembly is further provided with a left rotating spring and a right rotating spring for a reset function.
Compared with the prior art, the invention has the following advantages:
1. the power source is hydraulic oil, moving parts rarely have hard friction (such as gear transmission) during working, and the lubricating is sufficient in the moving process, so that the probability of failure of the parts caused by mechanical wear is reduced, the service life of the equipment is prolonged, and the probability of failure of the parts caused by mechanical wear is reduced, so that the after-sale service cost is reduced; meanwhile, the maintenance cost and the maintenance time of equipment users are reduced;
2. the defects of insufficient transmission efficiency, oil consumption, few gears, trouble in speed change and unsafety of the belt-driven tractor-ploughing boat are overcome; compared with a gear-driven boat tractor, the gear-driven boat tractor has the advantages that step-variable speed is changed into stepless speed change (including reverse gear), and the speed change is light and convenient.
3. The manufacturing period is short, and mass production is easy to realize.
4. All operation objects are concentrated on an operation table with the size of 600 multiplied by 100mm, and the operation is convenient and flexible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a transmission structure of a hydraulically driven boat tractor according to the present invention;
fig. 2 is a schematic structural view of the transmission structure of the hydraulically driven boat tractor according to the present invention.
Description of reference numerals:
1. a power machine; 2. a drive pulley; 3. an oil tank; 4. a clutch; 5. a driven pulley; 6. a fifth speed regulating valve; 7. a lifting three-position four-way reversing valve; 8. a lift cylinder; 9. a first running wheel; 10. a first decelerator; l1, first oil motor; 12. a third speed regulating valve; 13. a third oil motor; 14. a fourth speed regulating valve; 15. a second oil motor; 16. a second decelerator; 17. a second road wheel; 18. a second speed regulating valve; 19. a walking three-position four-way reversing valve; 20. a first speed regulating valve; 21. an oil pump; 22. a soft rubber ring; 23. a knurled idle wheel; 24. an intermediate wheel bracket; 25. a steering thumb wheel; 26. a steering wheel assembly; 27. knurling a knob; 28. an operation platform.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention, and that the preferred embodiments of the invention are shown in the drawings. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present disclosure is set forth in order to provide a more thorough understanding thereof.
The hydraulic drive boat tractor transmission structure comprises a hydraulic drive mechanism and a direction control mechanism, and the hydraulic drive mechanism and the direction control mechanism are in transmission connection.
Referring to fig. 1, the hydraulic driving mechanism includes a power machine 1, a driving pulley 2, an oil tank 3, a clutch 4, a driven pulley 5, a fifth speed regulating valve 6, a lifting three-position four-way directional valve 7, a lifting oil cylinder 8, a first traveling wheel 9, a first speed reducer 10, a first oil motor l1, a third speed regulating valve 12, a third oil motor 13, a fourth speed regulating valve 14, a second oil motor 15, a second speed reducer 16, a second traveling wheel 17, a second speed regulating valve 18, a traveling three-position four-way directional valve 19, a first speed regulating valve 20, and an oil pump 21;
the power machine 1 is connected with a driving belt pulley 2, the oil pump 21 is connected with a driven belt pulley 5, and the driving belt pulley 2 and the driven belt pulley 5 are in transmission connection through a transmission belt, so that the mechanical energy of the power machine 1 is converted into hydraulic energy through transmission; the clutch 4 is arranged between the oil pump 21 and the driven belt pulley 5, the input end of the oil pump 21 is connected with the oil tank 3, the output end of the oil pump 21 is divided into three paths and is respectively connected with the first speed regulating valve 20, the second speed regulating valve 18 and the fifth speed regulating valve 6, and the functions of walking, rotary tillage and lifting are respectively executed;
the first speed regulating valve 20 is connected with a walking three-position four-way reversing valve 19, an output oil path of the walking three-position four-way reversing valve 19 is divided into two branches which are respectively connected with a third speed regulating valve 12 and a fourth speed regulating valve 14 to control walking, the speed change function of the equipment during walking is realized by matching with an accelerator of the power machine 1, and the advancing and backing of the equipment during advancing (equivalent to the advancing gear and the backing gear in mechanical transmission) are realized; the third speed regulating valve 12, the first oil motor l1, the first speed reducer 10 and the first travelling wheel 9 are sequentially connected, the fourth speed regulating valve 14, the second oil motor 15, the second speed reducer 16 and the second travelling wheel 17 are sequentially connected, the flow rates of the third speed regulating valve 12 and the fourth speed regulating valve 14 are respectively controlled, the steering of the equipment is realized, when the flow rate of the third speed regulating valve 12 of the speed regulating valve is reduced, the equipment turns left, otherwise, the equipment turns right, and when the flow rate of the speed regulating valve approaches 0, the equipment turns on site, so that the walking and steering functions on the left side and the right side are respectively executed in a matching manner;
the second speed regulating valve 18 is connected with the third oil motor 13, the third oil motor 13 is connected with a rotary cultivator (not shown in the figure) to execute the rotary cultivation function, and the third oil motor 13 is connected with the rotary cultivator to realize the rotary cultivation operation function and adjust the operation speed of the rotary cultivator at any time.
The fifth speed regulating valve 6 is connected with the lifting three-position four-way reversing valve 7, an output oil path of the lifting three-position four-way reversing valve 7 is connected with a lifting oil cylinder 8, the lifting oil cylinder 8 is connected with a lifting mechanism (not shown) for controlling the lifting of the rotary cultivator, and the lifting oil cylinder 8 realizes the lifting function of the rotary cultivator through the lifting mechanism. The fifth speed regulating valve 6 controls the sliding speed of the oil cylinder (a throttle valve can be used, and the sliding speed is regulated at one time), the lifting three-position four-way reversing valve 7 controls the sliding direction of the oil cylinder, and the lifting amplitude and the lifting speed of the rotary cultivator are realized through the lifting mechanism.
Referring to fig. 2, the direction control mechanism includes an operation console 28, a soft rubber ring 22, a knurled intermediate wheel 23, an intermediate wheel bracket 24, a steering wheel 25, a steering wheel assembly 26 and a knurled knob 27;
the first speed regulating valve 20, the second speed regulating valve 18, the third speed regulating valve 12, the fourth speed regulating valve 14, the fifth speed regulating valve 6, the intermediate wheel bracket 24 and the steering wheel assembly 26 are all arranged on an operating table 28; the epaxial cover of steering wheel subassembly 26 is equipped with and turns to thumb wheel 25, the cover is equipped with soft rubber circle 22 on the third governing valve 12, the cover is equipped with annular knurl knob 27 on the fourth governing valve 14, be provided with annular knurl idle wheel 23 on the idle wheel support 24, soft rubber circle 22 and annular knurl knob 27 are located the both sides of turning to thumb wheel 25 respectively, just turn to thumb wheel 25 through annular knurl idle wheel 23 with soft rubber circle 22 transmission is connected, turn to thumb wheel 25 with annular knurl knob 27 transmission is connected.
The shaft of the steering wheel assembly 26 is also provided with a left rotating spring and a right rotating spring (not shown) with a reset function, and when the left rotating spring and the right rotating spring are balanced after a hand leaves the steering wheel assembly 26, the steering thumb wheel 25 rotates to be separated from the soft rubber ring 22 and the knurled knob 27, so that the automatic reset straight-moving function is realized.
Specifically, the steering wheel assembly 26 is rotated to drive the steering thumb wheel 25 to swing left and right, when the steering thumb wheel 25 swings left, the knurled idle wheel 23 is driven to rotate right, and then the soft rubber ring 22 on the third speed regulating valve 12 is driven to rotate left, so that the flow of the third speed regulating valve 12 is reduced, the rotating speed of the first travelling wheel 9 is reduced, and the equipment rotates left; when the steering thumb wheel 25 swings rightwards, the knurled knob 27 on the fourth speed regulating valve 14 is driven to rotate leftwards, so that the flow of the fourth speed regulating valve 14 is reduced, the rotating speed of the second travelling wheel 17 is reduced, and the equipment rotates rightwards; when the jog dial 25 is turned to disengage both the left soft rubber ring 22 and the right knurled knob 27, the third speed valve 12 and the fourth speed valve 14 flow are simultaneously restored to maximum and the device goes straight.
Compared with the prior art, the power source of the transmission structure of the hydraulically driven boat tractor is hydraulic oil, moving parts rarely have hard friction during working, and the moving parts are fully lubricated during movement, so that the probability of failure of the parts caused by mechanical wear is reduced, the service life of equipment is prolonged, and the probability of failure of the parts caused by mechanical wear is reduced, so that the after-sale service cost is reduced; meanwhile, the maintenance cost and the maintenance time of equipment users are reduced; the defects of insufficient transmission efficiency, oil consumption, few gears, trouble in speed change and unsafety of the belt-driven tractor-ploughing boat are overcome; compared with a gear-driven boat tractor, the gear-driven boat tractor has the advantages that the step-variable speed is changed into the stepless speed change, and the speed change is light and convenient. The manufacturing period is short, mass production is easy to realize, and all operation objects are concentrated on the operation table 28 with the size of 600 multiplied by 100mm, so that the operation is convenient and flexible.
Those not described in detail in this specification are within the skill of the art. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
Claims (3)
1. A hydraulic drive boat tractor transmission structure, characterized by includes: the hydraulic driving mechanism and the direction control mechanism are in transmission connection; the hydraulic driving mechanism comprises a power machine (1), a driving belt pulley (2), an oil tank (3), a clutch (4), a driven belt pulley (5), a fifth speed regulating valve (6), a lifting three-position four-way reversing valve (7), a lifting oil cylinder (8), a first travelling wheel (9), a first speed reducer (10), a first oil motor (l1), a third speed regulating valve (12), a third oil motor (13), a fourth speed regulating valve (14), a second oil motor (15), a second speed reducer (16), a second travelling wheel (17), a second speed regulating valve (18), a travelling three-position four-way reversing valve (19), a first speed regulating valve (20) and an oil pump (21); the power machine (1) is connected with a driving belt pulley (2), the oil pump (21) is connected with a driven belt pulley (5), and the driving belt pulley (2) is in transmission connection with the driven belt pulley (5) through a transmission belt; a clutch (4) is arranged between the oil pump (21) and the driven belt pulley (5), the input end of the oil pump (21) is connected with the oil tank (3), and the output end of the oil pump (21) is divided into three paths to be respectively connected with a first speed regulating valve (20), a second speed regulating valve (18) and a fifth speed regulating valve (6);
the first speed regulating valve (20) is connected with the walking three-position four-way reversing valve (19), and an output oil path of the walking three-position four-way reversing valve (19) is divided into two branches which are respectively connected with the third speed regulating valve (12) and the fourth speed regulating valve (14) to control walking; the third speed regulating valve (12), the first oil motor (l1), the first speed reducer (10) and the first travelling wheel (9) are sequentially connected, and the fourth speed regulating valve (14), the second oil motor (15), the second speed reducer (16) and the second travelling wheel (17) are sequentially connected;
the second speed regulating valve (18) is connected with a third oil motor (13), and the third oil motor (13) is connected with a rotary cultivator;
the fifth speed regulating valve (6) is connected with the lifting three-position four-way reversing valve (7), an output oil path of the lifting three-position four-way reversing valve (7) is connected with a lifting oil cylinder (8), and the lifting oil cylinder (8) is connected with a lifting mechanism for controlling the lifting of the rotary cultivator.
2. The transmission structure of a hydraulically driven boat tractor of claim 1, wherein: the direction control mechanism comprises an operation table (28), a soft rubber ring (22), a knurled idle wheel (23), an idle wheel bracket (24), a steering dial wheel (25), a steering wheel assembly (26) and a knurled knob (27);
the first speed regulating valve (20), the second speed regulating valve (18), the third speed regulating valve (12), the fourth speed regulating valve (14), the fifth speed regulating valve (6), the intermediate wheel bracket (24) and the steering wheel assembly (26) are all arranged on an operating table (28); the epaxial cover of steering wheel subassembly (26) is equipped with turns to thumb wheel (25), the cover is equipped with soft rubber circle (22) on third governing valve (12), the cover is equipped with knurling knob (27) on fourth governing valve (14), be provided with knurling idle wheel (23) on idle wheel support (24), soft rubber circle (22) and knurling knob (27) are located the both sides of turning to thumb wheel (25) respectively, just turn to thumb wheel (25) through knurling idle wheel (23) with soft rubber circle (22) transmission is connected, turn to thumb wheel (25) with knurling knob (27) transmission is connected.
3. The transmission structure of a hydraulically driven boat tractor of claim 2, wherein: and a left rotating spring and a right rotating spring with a reset function are also arranged on the shaft of the steering wheel component (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214366.5A CN113973526A (en) | 2021-10-19 | 2021-10-19 | Hydraulic drive boat tractor transmission structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111214366.5A CN113973526A (en) | 2021-10-19 | 2021-10-19 | Hydraulic drive boat tractor transmission structure |
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| Publication Number | Publication Date |
|---|---|
| CN113973526A true CN113973526A (en) | 2022-01-28 |
Family
ID=79739260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111214366.5A Pending CN113973526A (en) | 2021-10-19 | 2021-10-19 | Hydraulic drive boat tractor transmission structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113973526A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437105Y (en) * | 2000-08-08 | 2001-07-04 | 象山县农业机械局 | Boat type rotavator for shoal |
| CN102369798A (en) * | 2011-11-02 | 2012-03-14 | 湖北金驰机器有限公司 | Four-wheel drive multifunctional cultivating boat |
| CN202340388U (en) * | 2011-11-02 | 2012-07-25 | 湖北金驰机器有限公司 | Four-wheel driven multifunctional boat-tractor |
| CN205093109U (en) * | 2015-11-06 | 2016-03-23 | 武汉市法泗华友机耕船制造有限公司 | Rotary tillage ship |
-
2021
- 2021-10-19 CN CN202111214366.5A patent/CN113973526A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2437105Y (en) * | 2000-08-08 | 2001-07-04 | 象山县农业机械局 | Boat type rotavator for shoal |
| CN102369798A (en) * | 2011-11-02 | 2012-03-14 | 湖北金驰机器有限公司 | Four-wheel drive multifunctional cultivating boat |
| CN202340388U (en) * | 2011-11-02 | 2012-07-25 | 湖北金驰机器有限公司 | Four-wheel driven multifunctional boat-tractor |
| CN205093109U (en) * | 2015-11-06 | 2016-03-23 | 武汉市法泗华友机耕船制造有限公司 | Rotary tillage ship |
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Application publication date: 20220128 |