JP4088920B2 - Rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a rice transplanter that includes a seedling stage and a seedling planting claw and performs seedling planting work continuously .
[0002]
[Prior art]
Conventionally, there is a technique using a hydraulic continuously variable transmission mechanism (HST) composed of a variable displacement hydraulic pump and a hydraulic motor as a traveling transmission device of a rice transplanter, and a lever for operating this transmission device is a swash plate of the transmission mechanism Only the angle is changed. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent No. 2997580 [0004]
[Problems to be solved by the invention]
Normally, in rice transplanters, the vehicle speed is changed by shifting the speed change lever at the high speed position of the accelerator lever that changes the engine speed during work, but when shifting, the speed change lever is moved to the neutral position. Even if the aircraft is stopped, unless the accelerator lever is returned from the high speed to the low speed position, the engine speed remains at the high speed and the quieter work cannot be performed. Also, when the continuously variable transmission mechanism is in the high speed state and the engine speed is in the low speed state, the engine is in an insufficient output state, or when the continuously variable transmission mechanism and the engine speed are both in the high speed state and the clutch is engaged. May start suddenly.
[0005]
[Means for Solving the Problems]
Accordingly, the present invention includes an engine in which the engine rotation change member for changing the engine speed is attached, the engine rotation change operation member for changing the operation of the engine rotation change member, the output of the previous SL engine by a continuously variable drive A rice transplanter comprising a continuously variable hydraulic transmission that outputs to a wheel, and a shift operation member that changes an output of the continuously variable hydraulic transmission, the engine rotation changing operation member and the shift operation member, A bifurcated accelerator wire for connecting to the engine rotation changing member, and one of the bifurcated wire portions of the bifurcated accelerator wire is connected to a spring at the tip side and slidably inserted into the joint at the other end side The outer tube of the one forked wire part is connected to the speed change operation member and the other end is connected to the joint. The other end of the bifurcated wire portion of the bifurcated accelerator wire has a distal end connected to the engine rotation changing operation member 31 and the other end connected to the connector, and the bifurcated accelerator wire. The single wire portion has a distal end side connected to the engine rotation changing member and the other end side connected to the connecting body, and operates the speed change operation member to connect the outer tube to the one bifurcated wire portion. Or by moving the other bifurcated wire portion by operating the engine rotation changing operation member to move the connecting body with respect to the joint by a predetermined stroke. Since the engine rotation changing member biased to the low speed side is operated to the high speed side by pulling the You can change the planting working speed by the engine speed, but can improve the planting workability.
[0006]
[0007]
[0008]
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 front view of the same, FIG. 4 is a side view of the vehicle body, FIG. 5 is a plan view of the vehicle. The air-cooled engine 2 is mounted on the vehicle body frame 3, the front wheels 6 for paddy field travel are supported on the side of the transmission case 4 via the front axle case 5, and the rear axle case 7 behind the transmission case 4 is traveled on the paddy field. The rear wheel 8 for use is supported. 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 on the rear upper side of 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.
[0009]
In the figure, reference numeral 15 denotes a planting part having a seedling mounting table 16 for eight-row planting, a plurality of seedling planting claws 17 and the like. The planting case 20 is supported by the planting case 20 through the lower rail 18 and the upper rail 19 so as to be slidable to the left and right, 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.
[0010]
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. A hydraulic lifting cylinder 27 is connected to the lower link 25, and the front and rear wheels 6 and 8 as drive wheels are driven to move, and at the same time, a single seedling is planted from the seedling mounting table 16 that is reciprocated to the left and right. It is configured so as to perform a rice transplanting operation in which the seedlings 17 are taken out and planted continuously.
[0011]
In the figure, 28 is a main transmission lever, 29 is a planting operation lever for raising and lowering the planting part 15, planting clutch on / off, and marker operation, 30 is a transmission pedal as a transmission operation member , and 31 is an engine rotation change. An accelerator lever 32 as an operation member is a unit clutch lever.
[0012]
Further, in the figure, 33 is a center two leveling center float, 34 is a left and right two leveling side float, 35 is a left and right outermost one leveling auxiliary float, and 36 is a fertilizer in a fertilizer hopper 37. This is an eight-row side strip fertilizer that is discharged to a side strip groover (not shown) of each of the floats 33, 34, and 35 with an air blowing force.
[0013]
4 to 5, the vehicle body frame 3 is divided into a front frame 39, an intermediate frame 40, and a rear frame 41, and the engine 2 is connected to the pair of left and right front frames 39, and the pair of left and right intermediate frames 40. A front axle case 5, a pair of left and right rear frames 41 are provided with a rear axle case 7 and a fuel tank 42 for supplying fuel to the engine 2. A front frame 43 and a base frame 44 are provided between the front side and the middle of the front frame 39. And the engine 2 is mounted on the fixed bracket 45 and the base frame 44 of the front frame 39 via the vibration isolating rubber 46.
[0014]
Further, a power steering case 47 is provided on the left side of the front surface of the transmission case 4 and a continuously variable hydraulic transmission (HST) 48 is provided on the right side of the case 4 so that the shift input pump shaft 49 of the hydraulic transmission 48 is directed forward of the vehicle body. The pump shaft 49 is connected to the transmission shaft 50 in the front-rear direction on the lower right side of the engine 2, and the transmission shaft 50 is connected to the output shaft 51 of the engine 2 via the transmission belt 52. Is transmitted to the hydraulic transmission 48.
[0015]
Further, the transmission case 4 and the rear axle case 7 are integrally connected by a pipe-like connecting frame 53 on the longitudinal center line of the vehicle body, and the traveling output shaft 54 and the PTO output shaft 55 are projected to the rear of the transmission case 4 so that the rear axle is The travel output shaft 54 is connected to the rear input shaft 56 that protrudes forward from the case 7 via a rear transmission shaft 57, and power is transmitted from the travel output shaft 54 to the left and right rear wheels 8. Further, the PTO output shaft 55 is connected to an intermediate shaft 59 provided on the bearing 58 at the upper part of the rear axle case 7 via a universal joint shaft 60, and the intermediate shaft 59 is connected to the input shaft of the planting case 20 via a universal joint shaft. Power is transmitted from the PTO output shaft 55 to the planting unit 15.
[0016]
6 to 14, a muffler 62 of the engine 2 is attached to the lower side of the step base 61 on the left outer side of the front frame 39, and a battery 64 for starting the engine 2 on the step base 63 on the right outer side of the front frame 39 is installed. A battery base 65 is attached.
[0017]
In addition, an engine cooling fan 67 is disposed in the fan case 66 on the rear side of the engine 2, and a cooling air intake 68 is opened substantially at the center of the rear surface of the fan case 66, and a dust-proof net 69 is stretched over the intake 68. An oil cooler 70 such as engine oil, transmission oil, transmission (HST) oil, etc. is arranged in a vertical shape and a horizontally long shape at a position behind the intake port 68, and the oil cooler 70 is arranged via a mounting base 71 and a mounting plate 72. The cooling effect of the oil cooler 70 is obtained by forcibly cooling the oil cooler 70 using the engine cooling fan 67 without being separately provided with a cooling fan dedicated to the oil cooler 70 by being connected to and supported by the handle column 73 of the steering handle 14. And the oil cooler 70 can be assembled in a compact and compact manner.
[0018]
Further, the rear upper side of the engine 2 is covered with a quadrangular box-shaped cover 74, and an air cleaner 75 of the engine 2 is disposed between the covers 74. The fan chamber 76 in the fan case 66 is connected to the cleaner chamber in the cover 74. 77, the front upper side of the engine 2 is covered with a front-view portal exhaust cover 78, and a cooling exhaust passage 79 communicating with the cleaner chamber 77 is formed inside the cover 78, as shown in FIG. As described above, the cooling air after flowing through the cleaner chamber 77 is discharged outside the air outlet 80 that opens to the front surface of the bonnet 9 through the air exhaust passage 79, the temperature rise of the cleaner chamber 77 is suppressed, and cold air is sent into the carburetor. 2 is configured to increase output and improve fuel consumption. The air exhaust port 80 is disposed above the step 11a of the vehicle body cover 11, and the air exhaust from the air exhaust port 80 does not hit the seedling of the cocoon and can prevent the seedling from being damaged.
[0019]
Further, as shown in FIG. 10, a single air guide plate 81 is provided on the front side of the engine 2 for merging hot air (engine cooling air) circulating and discharged forward from the left and right sides of the engine 2 and guiding it downward. Therefore, the baffle plate 81 has an L-shaped front guide plate 81 having a confluence portion 81a for converging the winds from the left and right, and a lower discharge portion 81b for collecting and guiding the merged air to the left and discharging it downward, and the confluence portion 81a The shape of the upper corner 3 (upper, left, right, forward) is formed by guide surfaces 81c each having an obtuse angle so that the hot air after circulation of the engine 2 smoothly joins at the merging portion 81a and the lower side of the discharging portion 81b It is configured to improve the hot air discharge efficiency by discharging the air well downward from the discharge port 82. Further, the output shaft 51 and the transmission belt 52 system are compactly arranged in a space 83 formed inside the merging portion 81a and the discharge portion 81b, thereby making it possible to easily reduce the size of the machine body.
[0020]
Further, an electrical component 84 such as a relay related to the engine 2 is disposed above the covers 74 and 78, and the electrical component 84 is detachably attached to a frame 85 connected to the front frame 43 and the handle column 73 via the electrical mount 86. Even in the structure in which the electrical component 84 is disposed at a position close to the upper side of the engine 2, adverse effects such as direct transfer of the heat of the engine 2 to the electrical component 84 are reduced, and the heat generated in the electrical component 84 is reduced. The inconvenience transmitted to the air cleaner 75 is also reduced, and the performance (quality) of both the electrical component 84 and the air cleaner 75 is stably maintained.
[0021]
As shown in FIGS. 16 to 18, the throttle lever 87 of the engine 2 is disposed at the lower position of the exhaust cover 78, and the accelerator lever 31 disposed on the right side of the steering handle 14 and the lower position of the accelerator lever 31. A throttle lever 87 is linked to a shift pedal 30 to be provided via a bifurcated accelerator wire 88. The tip of the bifurcated wire portions 88a and 88b of the accelerator wire 88 is connected to the shift pedal 30 and the accelerator lever 31, and The tip of one wire portion 88c is connected to the throttle lever 87 so that the engine speed can be changed by any operation of the shift pedal 30 and the accelerator lever 31.
[0022]
The shift pedal 30 is pivotably connected to a pedal shaft 89 via a pedal arm 90, a shift operation cam 91 is fixed to the pedal shaft 89, and the swash plate angle of the hydraulic transmission 48 (hydraulic pump) is fixed. The operation cam 91 is connected to the control shaft 92 for adjusting the speed via the speed change rod 93, and the speed maintaining cam 96 for engaging the notch 94 with the notch 94 of the operation cam 91 is provided. The control shaft 92 is sometimes rotated to change the vehicle speed.
[0023]
Further, an outer tube 98 of a wire portion 88a is connected to the pedal arm 90 via an outer receiver 97, and one end side of a spring 99, which is an elastic body, is connected to the distal end of the wire portion 88a. The other end of the spring 99 is connected to the fixed frame 101 to which the rotary shaft 100 is attached, and when the shift pedal 30 is stepped on, the outer tube 98 is moved with respect to the wire portion 88a (inner wire) and the throttle lever 87 is operated. The vehicle speed is changed and the engine speed is changed.
[0024]
Further, as shown in FIG. 19, the wire portion 88 b to be connected to the accelerator lever 31 connects the locking member 103 to the arm 102 integral with the lever 31, and the two wire portions 88 a and 88 b of the shift pedal 30 and the accelerator lever 31 are connected. The other end side is connected to a single connecting body 104, and the connecting body 104 is slidably inserted into a joint 106 that is connected to the outer tubes 98 and 105 of the wire portions 88a and 88b. loosen the respective wire portions 88a · 88b during non-operation of the accelerator lever 31 (0 position) with keeping the coupling element 104 in FIG. 19 the virtual line position, one of the wire by operating the shift pedal 30 or accelerator lever 31 When the portion 88a or 88b is pulled, as shown in the solid line state in FIG. 4 to move the to constitute a throttle lever 87 pulls the single wire portion 88c to operate in a high speed H side.
[0025]
In this way, the wire lever 88b is loosened when the accelerator lever 31 that is the engine rotation speed change operation member for operating the throttle lever 87 is operated at 0 or low speed, and the speed change pedal 30 is preferentially operated, and when the accelerator lever 31 is operated at high speed H, the connection is established. The body 104 is moved to the high speed side by the stroke L and given priority over the speed change pedal 30, and it is accurately changed to the optimum work speed (traveling) mode according to various work situations such as when escaping a wetland that requires low speed and high torque. Thus, workability can be improved.
[0026]
As shown in FIGS. 20 and 21, the fixed frame 101 is fixed to the upper surface of the fixed frame 101 by fixing the front and rear ends between the fixed bracket 107 at the rear end of the front frame 39 and the mounting member 108 at the front end of the rear frame 41. A base end of the speed change pedal 30 is swingably supported on the pedal base 109 via the rotation shaft 100.
[0027]
Further, as shown in FIG. 22, the wire 88a may be directly connected to the operation cam 91 or the pedal arm 90 via a spring 99.
[0028]
As is clear from the above, a shift pedal 30 that is a work shift operation member that includes a hydraulic transmission (HST) 48 that is driven by the output of the engine 2 to shift a work speed such as a vehicle speed, and that shifts the transmission 48, By connecting the throttle lever 87, which is an engine speed changing member for changing the engine speed, via the accelerator wire 88, which is a connecting member, the engine speed is always kept at a low speed when the vehicle is running at a low speed or stopped. The engine can be driven quietly and effectively, and work can be performed satisfactorily. When the seedling work is performed, the work can be automatically performed silently. It is possible to prevent the inconvenience that the engine 2 becomes insufficiency when the engine speed is low, and when the vehicle is started or stopped, the engine speed is set to a low speed as the vehicle travels It can be carried out smooth start and stop.
[0029]
In addition, the throttle lever 87 is connected to the accelerator lever 31 and the speed change pedal 30 via a bifurcated wire 88, and a dispersion preventing spring 99, which is an elastic body, is interposed between the speed change pedal 30 and the wire 88, whereby the wire 88 and Simple operation using the spring 99 makes the operation stroke on the shift pedal 30 side larger than the operation stroke on the accelerator lever 31 side to prevent variation in operation, and the operation speed can be always changed at a stable engine speed. Therefore, it is possible to improve the reliability of the work, and it is possible to perform a good high-speed work in which the speed change pedal 30 and the accelerator lever 31 are completely positioned at a high speed.
[0030]
【The invention's effect】
As is apparent from the above embodiments, the present invention includes the engine 2 provided with the engine rotation changing member 87 for changing the engine speed, the engine rotation changing operation member 31 for changing the engine rotation changing member 87, and the engine 2. Is a rice transplanter including a continuously variable hydraulic transmission 48 that continuously outputs the output of the output to the drive wheel 8 and a speed change operation member 30 that changes the output of the continuously variable hydraulic transmission 48. A bifurcated accelerator wire 88 for connecting the change operating member 31 and the speed change operating member 30 to the engine rotation changing member 87 is provided, and one end 88a of the bifurcated wire portion of the bifurcated accelerator wire 88 is connected to the spring 99. And the other end side is connected to a connecting body 104 slidably inserted in the joint 106, and the outer tube 98 of one bifurcated wire portion 88a is The end side is connected to the speed change operation member 30 and the other end side is connected to the joint 106. The other end 88b of the forked wire portion of the bifurcated accelerator wire 88 is connected to the engine rotation changing operation member 31; The other end side is connected to the connecting body 104, and the single wire portion 88c of the bifurcated accelerator wire 88 is connected to the engine rotation changing member 87 at the front end side and connected to the connecting body 104 at the other end side. The shifting operation member 30 is operated to move the outer tube 98 with respect to the one forked wire portion 88a , or the engine rotation changing operation member 31 is operated to move the other forked wire portion 88b to be connected. By moving the body 104 with respect to the joint 106 by a predetermined stroke L and pulling the single wire portion 88c, the low speed side Since the engine speed changing member 87 is urged those configured to operate at a high speed side can always stable changed planting working speed by the engine speed, in which can be improved planting workability.
[0031]
[0032]
[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 an overall front view of a rice transplanter.
FIG. 4 is a side view of the vehicle body.
FIG. 5 is a plan view of the vehicle body.
FIG. 6 is a perspective view of an engine unit.
FIG. 7 is a side view of an engine unit.
FIG. 8 is a plan view of an engine unit.
FIG. 9 is a front view of an engine unit.
FIG. 10 is an explanatory perspective view of an engine unit.
FIG. 11 is an explanatory perspective view of an engine unit.
FIG. 12 is a cross-sectional explanatory view of a bonnet portion.
FIG. 13 is an explanatory plan view of a bonnet portion.
FIG. 14 is an explanatory diagram of an engine cooling unit.
FIG. 15 is an explanatory front view of a bonnet portion.
FIG. 16 is an explanatory diagram of an engine throttle unit.
FIG. 17 is an explanatory diagram of a shift pedal unit.
FIG. 18 is an explanatory diagram of a bifurcated wire portion.
FIG. 19 is an explanatory diagram of a wire joint portion.
FIG. 20 is a perspective view of a fixed frame part.
FIG. 21 is a perspective view of a fixed frame portion.
FIG. 22 is another explanatory diagram of a bifurcated wire portion.
[Explanation of symbols]
2 Engine
8 Rear wheels (moving wheels)
30 Shift pedal (shift operation member)
31 Accelerator lever (engine rotation changing operation member)
48 continuously variable hydraulic transmission 87 throttle lever (engine rotation changing member)
88 accelerator wire
88a One bifurcated wire part of the accelerator wire
88b The other bifurcated wire portion of the accelerator wire
88c Single wire part of accelerator wire
98 Outer tube 99 Spring
104 Connected body
106 Joint
L Connected body travel stroke

Claims (1)

The engine 2 provided with an engine rotation changing member 87 for changing the engine speed, the engine rotation changing operation member 31 for changing the engine rotation changing member 87, and the output wheel of the engine 2 by continuously changing the output. A rice transplanter comprising a continuously variable hydraulic transmission 48 that outputs to 8 and a speed change operation member 30 that changes the output of the continuously variable hydraulic transmission 48;
A bifurcated accelerator wire 88 for connecting the engine rotation change operation member 31 and the speed change operation member 30 to the engine rotation change member 87;
One of the bifurcated wire portions 88a of the bifurcated accelerator wire 88 is coupled to a connecting body 104 having a distal end side coupled to a spring 99 and the other end side slidably inserted into the joint 106,
The outer tube 98 of the one forked wire portion 88a has a distal end side connected to the speed change operation member 30, and the other end side connected to the joint 106.
The other end 88b of the bifurcated wire portion of the bifurcated accelerator wire 88 is connected to the engine rotation changing operation member 31 at the tip end and to the connecting body 104 at the other end.
The single wire portion 88c of the bifurcated accelerator wire 88 has a distal end connected to the engine rotation changing member 87 and the other end connected to the connecting body 104.
The shift operation member 30 is operated to move the outer tube 98 with respect to the one forked wire portion 88a, or the engine rotation changing operation member 31 is operated to move the other forked wire portion 88b. By moving the connecting body 104 with respect to the joint 106 by a predetermined stroke and pulling the single wire portion 88c, the engine rotation changing member 87 biased to the low speed side is moved to the high speed side. Rice transplanter characterized by being configured to operate.

Images