JP4678745B2 - Rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rice transplanter that includes a seedling stage and a seedling planting claw and performs seedling planting work continuously.
[0002]
[Problems to be solved by the invention]
Conventionally, since the fuel tank is arranged near the upper position of the engine, the installation space is also restricted by other parts, making it impossible to install a large capacity fuel tank. In addition, when a large-capacity fuel tank is provided above the engine, visibility forward from the driver's seat is poor.
[0003]
[Means for Solving the Problems]
Therefore, the present invention provides a vehicle body frame on which an engine is mounted, a front wheel supported by a front axle case, a rear wheel supported by a rear axle case, and a planting provided on the rear side of the vehicle body frame via a lifting link mechanism. A step in which an operator rides, and a connecting frame for connecting the rear axle case at the rear part of the vehicle body frame to a transmission case at the front part of the vehicle body frame. In the rice transplanter in which a driver's seat is arranged on the upper surface side of the step rear portion behind the step rising portion , the rear frame of the vehicle body frame is located below the step rear portion from the step rising portion on the rear side of the step to the lower side of the driver seat. A fuel tank is provided via the step, the connecting frame, and the vehicle body frame. A base end side of the planting lift cylinder is connected to the upper surface side of the connection frame, and the driver seat, the planting lift cylinder, and the connection frame are connected to each other. The fuel tank is disposed in between, and the fuel tank is detachably fixed to a pipe frame connected between the left and right frames of the rear frame via an attachment member. A large-capacity fuel tank can be easily installed using space effectively, and the fuel tank can be placed in the center of the aircraft, preventing the deterioration of the balance between the front and rear and the left and right of the aircraft due to increase and decrease of fuel, and improving the stability of the aircraft It is to improve.
[0004]
In addition, the driver's seat, lifting cylinder, and fuel tank are compactly incorporated to reduce the size of the aircraft.
[0005]
In addition, the fuel tank is protected from obstacles and the like below the fuselage by the connecting frame to prevent damage to the fuel tank.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a side view of a vehicle body frame, FIG. 4 is a plan view of the body, and 1 is a traveling vehicle on which an operator rides. Mounted on the vehicle body frame 3, the front wheel 6 for paddy field traveling is supported on the side of the transmission case 4 via the front axle case 5, and the rear wheel 8 for paddy field traveling is supported on the rear axle case 7 behind the transmission case 4. The spare seedling stage 10 is attached to both sides of the bonnet 9 that covers the engine 2 and the like, and the mission case 4 and the like are covered by a vehicle body cover 11 on which an operator rides, and a seat frame 12 is disposed above and behind the vehicle body cover 11 via a seat frame 12. A driver's seat 13 is attached, and a steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.
[0007]
In the figure, reference numeral 15 denotes a planting part having a seedling mounting table 16 for five-row planting and a plurality of seedling planting claws 17. The planting case 20 is supported by the planting case 20 through the lower rail 18 and the guide rail 19 so as to be slidable in the left and right directions, and a rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20. A pair of nail cases 22 and 22 are arranged at symmetrical positions around the axis, and seedling planting nails 17 and 17 are attached to the tips of the nail cases 22 and 22.
[0008]
Further, the hitch bracket 23 on the front side of the planting case 20 is connected to the rear side of the traveling vehicle 1 through an elevating link mechanism 26 including a top link 24 and a lower link 25, and the planting unit 15 is moved up and down via the link mechanism 26. The hydraulic lifting cylinder 27 is connected to the lower link 25, and the front and rear wheels 6 and 8 are driven to move, and at the same time, the seedlings 16 are slid back and forth, and one seedling is planted by the planting claws 17. It is configured to take out and perform seedling planting work continuously.
[0009]
In the figure, 28 is a main transmission lever, 29 is a planting lift lever, 30 is a brake pedal, 31 is an accelerator pedal, 32 is a differential lock pedal, 33 is a sensitivity adjustment lever, and 34 is stopped at an arbitrary height position of the planting part 15. The stop lever 35 is a unit clutch lever 35. The main shift and elevating levers 28 and 29 and the brake and accelerator pedals 30 and 31 are disposed near the steering handle 14, and the sensitivity is adjusted near the driver seat 13. In addition, stop and unit clutch levers 33, 34, 35 and a differential lock pedal 32 are provided.
[0010]
Further, in the figure, 36 is a center float for leveling of one strip, 37 is a side float for leveling of two strips, 38 is a float 36 through the flexible conveying hose 41 by using the blowing force of the blower 40 for fertilizer in the fertilizer hopper 39. -It is a 5-way side strip fertilizer machine which makes it discharge to 37 side strip groover 42.
[0011]
As shown in FIGS. 3 to 5, the vehicle body frame 3 is divided into a front frame 43, an intermediate frame 44, and a rear frame 45. The engine 2 is placed in the front frame 43, and the front axle case 5 is placed in the intermediate frame 44. The rear frame 45 is provided with a rear axle case 7 and a fuel tank 46 for supplying fuel to the engine 2. The front frame 43 has a front frame 47 at the front ends of the left and right frames 43a and 43b, and a base frame 48 at the middle. They are connected to each other to form a quadrangular frame shape in plan view, and the engine 2 is mounted on the fixing bracket 49 and the base frame 48 of the left and right frames 43a and 43b via vibration-proof rubber.
[0012]
The rear frame 45 is a portal frame in which the middle rising portions 50 of the left and right frames 45a and 45b are connected in parallel by a pipe frame 51 and a portal frame 52, and the left and right lower ends are fixed to the rear axle case 7. 53, the rear ends of the left and right frames 45a and 45b are integrally connected, and the fuel tank 46 is arranged between the rising portions 50 of the left and right frames 45a and 45b.
[0013]
Further, the intermediate frame 44 is configured such that the front and rear ends of the left and right intermediate frames 44 are detachably fixed to the rear ends of the front left and right frames 43a and 43b and the front ends of the rear left and right frames 45a and 45b through bolts 54, and The left and right front axle cases 5 are detachably fixed to the lower surface of the intermediate frame 44 via bolts 55, and the left and right front axle cases 5 are connected and fixed to the transmission case 4.
[0014]
In addition, the front left and right frames 43a and 43b have a larger cross-sectional area than the rear left and right frames 45a and 45b, so that the front frame 43 on which the heavy engine 2 is mounted is made rigid. The intermediate frame 44 and the rear frame 45 that do not require strength as compared with the front frame 43 are formed to be light in weight so that the front-rear balance and the strength balance are good. Further, by assembling and integrating the engine 2, the front axle case 5, the transmission case 4, the rear axle case 7, etc. into the divided front frame 43, intermediate frame 44, and rear frame 45, respectively, Maintainability can be improved.
[0015]
Then, step frames 56, 57, and 58 project from the front and rear outer sides of the front frame 43 and the front and outer sides of the rear frame 45, and the outer sides of these frames 56, 57, and 58 are connected by a front pipe 59, and the rear frame 45 The left and right rear pipes 62 are connected to the step frame 61 fixed between the upper sides of the rising parts 50 via the bracket 60 and the left and right outer sides of the frame 58, and the rear sides of the left and right rear pipes 62 are connected to each other by the horizontal frame 62a. The upper horizontal portion of the portal frame 53, the horizontal frame 62a, and the substantially central portion of the step frame 61 are connected by two frames 62b in the front-rear direction, and the footrest 63 is attached to the lower horizontal portion of the front side of the rear pipe 62. When the detachable bolt is fixed, and the driver's seat 13 is supported by the portal frame 52 and the step frame 61 via the seat frame 12. To constitute the top surface of each frame 56, 57, 58, 61 so as to freely fix hold removed body cover 11.
[0016]
As shown in FIGS. 6 to 13, the transmission case 4 has a power steering case 64 on the left side of the front surface and a hydraulic continuously variable transmission mechanism (HST) 65 on the right side. 66 is protruded in the front direction of the vehicle body, the input shaft 66 is connected to the counter shaft 67 in the front-rear direction at the lower side of the engine 2, and the counter shaft 67 is connected to the engine output shaft 68 via the transmission belt 69. Is transmitted to the transmission case 4 via the continuously variable transmission mechanism 65.
[0017]
Further, the transmission case 4 and the rear axle case 7 are integrally connected by a connecting frame 70 made of pipe on the center line of the vehicle body, and the rear traveling output shaft 71 and the PTO output shaft 72 are projected behind the transmission case 4 so that the rear axle case is 7. The output shaft 71 is connected to the input shaft 73 protruding forward through the transmission shaft 74, and the PTO output shaft 72 is connected to the intermediate shaft 76 provided on the bearing 75 at the upper part of the rear axle case 7 through the universal joint shaft 77. The intermediate shaft 76 is connected to the input shaft of the planting case 20 via a universal joint shaft 78.
[0018]
The connecting frame 70 is connected to the front and rear axle cases 5 and 7, a cylinder mounting seat 79 is fixed on the upper surface of the rear portion of the connecting frame 70, and the base end of the elevating cylinder 27 is mounted on the mounting seat on the center line of the vehicle body. 79 is configured to be supported. The inside of the connecting frame 70 may be used as a hydraulic oil tank such as the elevating cylinder 27, and the connecting frame 70 is connected to the front and axle cases 5 and 7 so that the inside of the cases 5 and 7 and the connecting frame 70 are connected. May be used in an oil tank.
[0019]
As shown in FIGS. 14 and 15, the rear axle case 7 is formed in a gate shape in a plan view, and rope hooks 81 are fixed to the outer surfaces of the left and right gear case portions 80 on both sides of the case 7 and are formed between the left and right gear case portions 80. The lower link 25 is disposed in the portal space 82, and the link bearing member 84 is fixed to the central upper surface of the axle case 7 via a bolt 83 which is a fixing means. 85, the front end side of the lower link 25 is connected, the tip of the piston rod 86 of the elevating cylinder 27 is connected to a pivot plate 25a fixed to the lower link 25, and the lower link 25 is connected to the hitch bracket 23 via the rear fulcrum shaft 88. The rear end side is connected and the planting part 15 is lifted and lowered by the top link 24 that connects the gate frame 53 and the hitch bracket 23. It is configured to perform.
[0020]
The lower link 25 is formed of a square pipe, and fulcrum cylinder shafts 89 and 90 to which the front and rear fulcrum shafts 85 and 88 are fitted are provided on the front and rear end sides of the lower link 25, thereby reducing the weight of the parts and rigidity against rolling. It is configured to improve.
[0021]
As shown in FIGS. 16 and 17, the fuel tank 46 is disposed in a surplus space between the rising portions 50 of the rear left and right frames 45 a and 45 b below the driver's seat 13. The front end of the tank 46 is fixed detachably via a bolt 92, and the left and right protruding edges 46 a in the middle of the tank 46 are connected via a bolt 95 to a tank mounting plate 94 fixed to the lower side of the step frame 61 via a bolt 93. The tank 46 is disposed in a well-balanced manner in a dead space surrounded by the driver's seat 13, the connecting frame 70, and the left and right frames 45a and 45b on the vehicle body center line in the rising portion 11a on the rear side of the vehicle body cover 11. It is configured to do.
[0022]
As shown in FIGS. 8 and 9, the power steering case 64 has a torque generator 96 on the upper side and a planetary reduction gear mechanism 97 on the lower side, and is provided in a vertically long shape. The width is made small and a compact arrangement is possible, so that the narrow tread of the left and right front wheels 6 can be handled well.
[0023]
The cam member 101 for operating the left and right side clutches in the rear axle case 7 is connected to the steering arm 98 below the power steering case 64 via the first and second rods 99, 100. The vertical swing arms 103 and 104 are fixed to the vertical projecting ends of the vertical axis 102 penetrating in the direction, and the first rod 99 and the upper swing arm are pivoted between the steering arm 98 and the lower swing arm 104 at a position on the right side of the connecting frame 70. The movable arm 103 and the cam member 101 are connected by the second rod 100 so that the left and right side clutch on / off operation linked to the operation of the steering handle 14 is performed.
[0024]
As is clear from the above, the vehicle body frame 3 constituting the airframe is divided into three parts, a front frame 43, an intermediate frame 44, and a rear frame 45. , Handling and assembly can be improved.
[0025]
Further, the front axle case 5 is connected to the intermediate frame 44, and the engine 2 and the like are connected to the front frame 43, and the transmission case 4 and the front axle case 5 are integrally attached and detached. Therefore, the maintenance of the transmission case 4 and the front axle case 5 can be improved.
[0026]
Further, the cross-sectional area of the front frame 43 is formed larger than that of the rear frame 45, and the engine 2 is supported by the front frame 43. The heavy engine 2 is supported by the front frame 43 with good strength. The stability of the aircraft can be improved by improving the front-rear balance with the planting portion 15 to be equipped on the rear side of the aircraft.
[0027]
In addition, a connecting frame 70 for integrally connecting the mission case 4 on the front side of the fuselage and the rear axle case 7 on the rear side of the fuselage is provided, and a planting lifting cylinder 27 for lifting the planting part 15 is attached to the coupling frame 70. Cylinder load is prevented from being applied to the body frame 3, and the body frame 3 can be easily and easily reduced in weight, and the cylinder load is supported by the front and rear wheels 6 and 8 through the connecting frame 70 and lifted up and down. The mounting strength of the cylinder 27 can be improved, and the heavy lifting cylinder 27 can be easily mounted.
[0028]
Further, a mounting seat 79 for the planting elevating cylinder 27 is provided on the upper surface of the connecting frame 70. The elevating cylinder 27 is supported on the connecting frame 70 with good strength, and the elevating cylinder 27 is connected to the connecting frame 70 from an obstacle below the fuselage. Can be protected without damage, and the performance of the cylinder 27 can be stably maintained.
[0029]
Further, the transmission case 4 and the rear axle case 7 are connected to each other via the rear frame 45 above the connection frame 70, and the transmission case 4, the rear axle case 7, the connection frame 70, and the rear frame 45 (including the gate-shaped frame 53). Thus, it is possible to easily reduce the weight and rigidity of the machine frame structure formed by the transmission case 4, the rear axle case 7, the connecting frame 70, and the rear frame 45.
[0030]
Further, a fuel tank 46 is disposed in the vehicle body cover 11 from the cover rising portion 11a on the rear side of the vehicle body cover 11 as a step to the lower side of the driver seat 13, and the dead space below the driver seat 13 is effectively used. The large-capacity fuel tank 46 can be easily installed, the vapor lock phenomenon of the fuel is prevented to improve the heat balance, and the fuel tank 46 is arranged at a substantially central position of the airframe to increase or decrease the fuel. The stability of the fuselage can be improved by preventing the deterioration of the front and rear and left / right balance.
[0031]
Further, the planting lift cylinder 27 and the driver's seat 13 that lift and lower the planting portion 15 with respect to the fuel tank 46 are vertically wrapped in a side view, and the driver seat 13, the lift cylinder 27, and the fuel tank 46 are It is possible to easily incorporate a compact aircraft with a small front-rear length, and to reduce the size of the aircraft.
[0032]
The fuel tank 46 is disposed above the connecting frame 70 to be connected, and the fuel tank 46 can be protected by the connecting frame 70 from an obstacle or the like below the fuselage, so that the fuel tank 46 can be prevented from being damaged.
[0033]
Further, in the rice transplanter in which the planting part 15 is supported on the machine side via the lifting link mechanism 26 so as to be lifted and lowered, a link bearing member 84 which is a machine side mounting part of the lower link 25 constituting the lifting link mechanism 26 is provided. It is provided on the rear axle case 7, and the load of the planting part 15 applied to the lower link 25 when planting is raised is favorably supported by the solid rear axle frame 7 to improve the support strength of the planting part 15, Compared with the conventional structure in which the lower frame 25 is supported on the vehicle body frame 3, the weight of the vehicle body frame 3 can be easily reduced, and the lower link 25 can be easily removed and attached to maintain the lower link 25. Can be improved.
[0034]
Further, a cylindrical shaft 89 that is a lower link fulcrum portion is integrally formed on the lower link 25, and a lower link fulcrum cylindrical shaft 89 on the front side of the lower link 25 is rotatably supported on the rear axle case 7 via an attachment portion 84. Therefore, the lower link 25 can be favorably supported on the rear axle case 7 with a simple structure with a reduced number of parts, and the planting portion 15 can be reliably held.
[0035]
Further, the rear axle case 7 is formed in a gate shape in plan view, and a lower link fulcrum cylinder shaft 89 is arranged in the portal space portion 82 of the rear axle case 7, and the lower link fulcrum cylinder shaft 89 is formed on the rear wheel 8 axles. The machine body and the planting part 15 can be brought close to the maximum so that the total length of the rice transplanter body can be easily reduced, and the machine body can be reduced in size.
[0036]
Further, the lower link 25 is formed of a single pipe member, and front and rear lower link fulcrum cylinder shafts 89 and 90 of the lower link 25 are provided at the front and rear ends of the pipe member. Therefore, the connecting structure of the lower link 25 can be simplified, and the weight of the lower link 25 can be reduced to easily reduce the size and weight of the fuselage.
[0037]
【The invention's effect】
As is apparent from the above-described embodiments, the present invention includes a vehicle body frame 3 on which the engine 2 is mounted, a front wheel 6 supported by the front axle case 5, a rear wheel 8 supported by the rear axle case 7, and a rear side of the vehicle body frame 3. A planting part 15 provided so as to be movable up and down via a lifting link mechanism 26, a planting lifting cylinder 27 for raising and lowering the planting part 15, a transmission case 4 at the front part of the body frame 3, and a rear axle case 7 at the rear part of the body frame 3. In the rice transplanter in which the driver's seat 13 is disposed on the upper surface side of the rear portion of the step 11 behind the step rising portion of the step ( body cover ) 11 on which the operator boardes, the connecting frame 70 for connecting the step 11 From the step rising portion on the rear side to the lower side of the driver's seat 13, the rear frame 4 of the vehicle body frame 3 is located below the rear portion of the step 11. 5, the fuel tank 46 is provided via the step 11, the connecting frame 70, and the vehicle body frame 3. The fuel tank 46 is surrounded by the step 11, and the planting elevating cylinder 27 is disposed on the upper surface side of the connecting frame 70. A fuel tank 46 is disposed between the driver's seat 13, the planting elevating cylinder 27, and the connecting frame 70, and is attached to the pipe frame 51 connected between the left and right frames 45 a and 45 b of the rear frame 45. Since the fuel tank 46 is configured to be detachably fixed via the member 91, the large-capacity fuel tank 46 can be easily installed by effectively using the space below the driver's seat 13, and the fuel tank 46 can be arranged on the center side of the fuselage, and the stability of the fuselage can be improved by preventing deterioration of the front / rear or left / right balance of the fuselage due to increase / decrease in fuel. Than is.
[0038]
Further, the driver's seat 13, the elevating cylinder 27, and the fuel tank 46 can be incorporated in a compact manner, and the size of the fuselage can be reduced.
[0039]
Furthermore, the connection frame 70 can protect the fuel tank 46 from obstacles and the like below the fuselage, prevent damage to the fuel tank 46, and improve durability.
[Brief description of the drawings]
FIG. 1 is an overall side view of a rice transplanter.
FIG. 2 is an overall plan view of a rice transplanter.
FIG. 3 is a side view of a traveling vehicle body.
FIG. 4 is a plan view of a traveling vehicle body.
FIG. 5 is a side view of the vehicle body frame.
FIG. 6 is an explanatory side view of a drive unit.
FIG. 7 is an explanatory plan view of a drive unit.
FIG. 8 is an explanatory side view of a side clutch operation system.
FIG. 9 is an explanatory plan view of a side clutch operation system.
FIG. 10 is a perspective explanatory view of a vehicle body.
FIG. 11 is a perspective explanatory view of a vehicle body.
FIG. 12 is a perspective explanatory view of a vehicle body.
FIG. 13 is an explanatory perspective view of a drive unit.
FIG. 14 is a perspective explanatory view of a lifting link part.
FIG. 15 is an explanatory diagram of an elevating link attaching portion.
FIG. 16 is a side view of a fuel tank installation.
FIG. 17 is a plan view of a fuel tank installation.
[Explanation of symbols]
4 Mission case 7 Rear axle case 11 Body cover (step)
11a Rise part 13 Driver's seat 15 Planting part 27 Lift cylinder 46 Fuel tank 70 Connection frame

Claims (1)

A vehicle body frame on which the engine is mounted, a front wheel supported on the front axle case, a rear wheel supported on the rear axle case, a planting portion provided on the rear side of the vehicle body frame via a lifting link mechanism, and the planting portion comprising a planting lift cylinder for lifting the biasing portion, and a connecting frame for connecting the rear axle case of the vehicle frame rear portion on the body frame front portion of the transmission case, of the steps the operator rides, step rising portion rearward In the rice transplanter which arranges the driver's seat on the upper surface side of the rear part of the step ,
A fuel tank is provided via a rear frame of the vehicle body frame below the step rear portion from the step rising portion on the rear side of the step to the lower side of the driver's seat, and the fuel is formed by the step, the connecting frame, and the vehicle body frame. A structure configured to surround the tank,
A base end side of the planting elevating cylinder is coupled to an upper surface side of the coupling frame, the fuel tank is disposed between the driver's seat, the planting elevating cylinder, and the coupling frame, and left and right of the rear frame A rice transplanter characterized in that the fuel tank is detachably fixed to a pipe frame connected between side frames via an attachment member.

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