JP2005312356A - Sulky rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized sulky rice transplanter capable of carrying out turning in the direction of a machine body on the levee side by using a small butt. <P>SOLUTION: In this sulky rice transplanter in which a seedling transplanter 6 is liftably connected to the rear of the traveling machine body 3 in which front wheels 1 and rear wheels 2 driven by a loaded engine 7 are installed and a driving sheet 9 is installed, the position in the longitudinal direction of the front end of the traveling machine body is nearly made to coincide with the position in the longitudinal direction of frond ends of the front wheels, and the driving sheet 9 is arranged at forward position more than the longitudinal center position (a) of whole length L of the rice transplanter including the seedling transplanter 6 when viewed from the side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a small-sized passenger having about 3 to 4 planting lines in which a seedling planting device is connected to a rear portion of a traveling machine body having front and rear wheels driven by an installed engine and equipped with a driver's seat. It relates to type rice transplanters.

As a small passenger-type rice transplanter, an engine is mounted below a driver seat disposed at the rear of the traveling aircraft, and a transmission case that receives engine power is disposed at the front of the aircraft (for example, patents). Reference 1).
Japanese Patent No. 3304516

  The planting work using the rice transplanter is a basic planting method, and when the planting run of one stroke is completed and the plant reaches the shore, the aircraft direction is reversed and the next planting process is started. In this case, the aircraft will be corrected for the planting of the next stroke along the shoots planted in the previous stroke, so-called alignment. Since it is not possible to steer to the desired alignment position, a switch turn or the like is performed at the headland on the shore and the traveling body is moved to the planting start position in the next stroke.

  In this case, in order to make the headland as small as possible, straight planting is performed until it approaches as close as possible, and then the direction change of the aircraft is performed. Since the front end of the head was projected forward of the front wheel, the size of the headland changed depending on the height of the reed.For example, in fields where the reed is lower than the front end of the aircraft, the front wheel is sufficient for the reed. Planting can be done until approached, and the headland is minimal, but in fields with high heels, the traveling aircraft approaches the heel before the front wheels are close enough to the heel, so it is close enough to the heel Planting was impossible and the headland became larger than necessary.

  This invention is made paying attention to such a point, and it aims at providing the small riding type rice transplanter which can perform the body direction change in the shore at a small headland. .

1st invention is a riding type rice transplanter which has a front wheel and a rear wheel driven by a mounted engine and is connected to a rear portion of a traveling machine equipped with a driver's seat so that a seedling planting device can be moved up and down.
In a side view, the front-rear direction position of the front end of the traveling machine body and the front-rear direction position of the front wheel front end substantially coincide with each other, and the driver's seat is positioned forward of the front-rear center position of the entire rice transplanter including the seedling planting device. It is arranged.

  According to the above configuration, since the front edge of the aircraft does not hit the kite before the front wheel no matter what the height of the kite, planting until the front wheel is sufficiently close to the kite and then turning the aircraft It is possible to change the direction of the aircraft at the edge of the heel regardless of the height of the heel, and to carry out the replanting along the heel after the reciprocating planting process. Can be done on the ground.

  Also, during boarding operation, the operator's weight acts toward the front of the whole rice transplanter, so the whole rice transplanter travels with a good front / rear weight balance despite the fact that the front end of the aircraft has been retreated and downsized. can do.

A second invention is a riding type rice transplanter having a front and rear wheels driven by an engine mounted thereon and a rear planter equipped with a driver's seat, and a seedling planting device connected to the rear part of the vehicle so as to be raised and lowered.
In side view, the front and rear direction position of the front end of the traveling machine body and the front and rear direction position of the front wheel front end are substantially matched, and the front and rear center position of the whole rice transplanter including the seedling planting device is substantially the same as the front and rear direction position of the rear wheel shaft center. It is characterized by being allowed.

  According to the above configuration, since the front edge of the aircraft does not hit the kite before the front wheel no matter what the height of the kite, planting until the front wheel is sufficiently close to the kite and then turning the aircraft It is possible to change the direction of the aircraft at the edge of the heel regardless of the height of the heel, and to carry out the replanting along the heel after the reciprocating planting process. Can be done on the ground.

  In addition, because the rear wheels, which are the main propulsion wheels, are located near the center of the front and rear of the entire length of the rice transplanter, it is easy to recognize the front and rear ends of the whole rice transplanter as a reference, and only change the direction of the aircraft at the end Rather, it is easy to maneuver when loading and unloading rice transplanters onto the loading platform of a transport vehicle or storing them in a garage.

According to a third invention, in the first or second invention,
The front-rear center position of the center distance between the front wheel and the rear wheel and the front-rear center position of the driver seat are close to each other.

  According to the above configuration, the weight of the boarded worker is applied to the front wheel and the rear wheel substantially evenly, so even if there is a difference in the worker weight, it hardly appears as a change in the ground load ratio of the front and rear wheels. In addition to the above-described effects of the present invention, even if operators of different weights get on board, the same driving performance is achieved.

A fourth invention is the invention according to any one of the first to third inventions,
A transmission case that receives the engine and engine power is disposed at a rear portion of a traveling machine body, and a front axle case including the front wheel is a frontmost structure of a transmission structure related to engine power transmission.

  According to the above configuration, there is no large structure such as an engine or a mission case at the front part of the aircraft, and the riding type that brings about the effects of any one of the first to third inventions and has excellent forward view and handling characteristics. A rice transplanter can be configured.

A fifth invention is the invention according to any one of the first to fourth inventions,
The engine is arranged between the front-rear direction position of the front wheel axis and the front-rear direction position of the rear wheel axis.

  According to the above configuration, the engine weight is applied to the front wheels and the rear wheels, so that the weight load remains unchanged and the weight balance of the seedling planting device due to the consumption of seedlings, regardless of the weight load fluctuations. The traveling machine body can be driven with a stable weight balance.

In a sixth aspect based on the fifth aspect,
The engine is mounted in a posture in which the output shaft protrudes sideways, and the cam shaft of the engine is used as the output shaft.

  According to the above configuration, the camshaft is decelerated to one half of the rotational speed of the crankshaft, so that the decelerating means in the transmission system after being taken out can be reduced in size and weight. This is effective in constructing a riding rice transplanter.

  FIG. 1 shows the entire side surface of the riding type rice transplanter according to the present invention, and FIG. 2 shows the entire plane. This riding type rice transplanter includes a link mechanism 5 that is driven to swing up and down by a hydraulic cylinder 4 at the rear of a four-wheel drive type traveling machine body 3 having a front wheel 1 that can be steered and a rear wheel 2 that cannot be steered. The seedling planting device 6 is connected to the rear of the traveling machine body 3 through an engine, and an engine 7 is provided at the rear of the traveling machine body 3, and a step 8 covering the engine 7 and the upper part of the traveling machine body 3 is detachably provided. The driver seat 9 is provided at the left and right central portion of the rear upper surface in Step 8, and the steering handle 11 is provided on the upper portion of the central front cover 10 erected at the front end portion of the traveling machine body 3.

  The seedling planting device 6 is configured to have a three-row planting specification. A seedling bed 12 on which three mat-like seedlings are placed side by side and reciprocated laterally with a constant stroke, and 1 from the lower end of the seedling bed 12. It consists of three sets of crank-type planting mechanisms 13 that cut out seedlings and plant them on the surface, leveling float 14 that leveles the planting location on the surface, and so on. The hydraulic cylinder 4 is controlled based on the vertical displacement of the swinging leveling float 14 that can swing freely, and the seedling planting device 6 is stably maintained at a height set with respect to the rice field regardless of whether the traveling machine body 3 is raised or lowered. Therefore, automatic planting depth control is performed to maintain a stable planting depth.

  In the traveling machine body 3, a transmission case 21 that pivotally supports the rear wheel 2 is connected to a rear end of a main frame 20 made of a pipe material, and a front axle case 22 equipped with a front wheel 1 is attached to the front end of the main frame 20. The main frame 20 has a function as a transmission case through which a front wheel drive shaft 23 that transmits power from the transmission case 21 to the front axle case 22 is inserted.

  The engine 7 uses an air-cooled gasoline engine with an output shaft 7a protruding on the left side, and is mounted in a vibration-proof manner with a low posture that leans backward across the main frame 20 and the transmission case 21. The output shaft 7a and the input shaft 21a projecting from the left side surface of the transmission case 21 are interlocked and connected by a belt transmission mechanism 25 having a tension type main clutch 24. The main clutch 24 is connected to the right side of step 8. The main clutch / brake pedal 26 provided at the front foot is mechanically linked.

  Here, as the output shaft 7a, a camshaft decelerated by half with respect to the crankshaft 7b is used, and the entire engine 7 is positioned so that the output shaft 7a is located behind the crankshaft 7b. Is tilted backwards. Further, the crankcase 7c, which is the main part of the engine 7, is arranged to be shifted to the left side of the left and right center C of the traveling machine body 3, that is, to the output side. Thus, even if the lateral width of the mission case 21 is increased and the input position is greatly deviated to the left, the protruding length of the output shaft 7a can be shortened to increase the durability against bending load. An air cleaner (not shown) is disposed on the right side of the engine 7, and the air cleaner is disposed within the lateral width of the mission case 21.

  The engine power input to the mission case 21 is branched into a traveling system and a working system, and the traveling system power is gear-shifted into a plurality of stages and then transmitted to the left and right rear wheels 2 via the left and right side clutches 27. A part of the traveling system speed change power is taken forward and transmitted to the front axle case 22 via the front wheel drive shaft 23, and the work system power branched in the transmission case 21 is transmitted from the upper part of the transmission case 21. It is taken out rearward and transmitted to the seedling planting device 6 via the telescopic transmission shaft 15.

  The front axle case 22 is not equipped with a differential mechanism, and the transmitted power is branched to the left and right via a lateral transmission shaft 29 inserted through the front axle case 22 so that the left and right front wheels 1 are always driven at a constant speed. It has come to be. Further, a multi-plate brake 30 that acts on the lateral transmission shaft 29 is provided at the input portion of the front axle case 22. The brake 30 is mechanically linked to the main clutch / brake pedal 26 so that when the main clutch / brake pedal 26 is depressed, the main clutch 24 is disengaged and the brake 30 is braked. It has become. The main clutch / brake pedal 26 is provided with an operation lever 26a, so that even when driving down to the ground, the main clutch / brake pedal 26 can be manually depressed to stop traveling. ing.

  A pair of left and right body frames 33 made of pipe material are installed across the left and right ends of the front stay 31 horizontally connected to the main frame 20 and the left and right ends of the rear stay 32 horizontally connected to the rear portion of the transmission case 21; The rear part of the step 8 formed by sheet metal pressing is placed and connected to the upper part of the body frame 33. In step 8, the rear part is raised to a height exceeding the engine 7, and an opening 34 through which a part of the engine 7 and the fuselage frame 33 is inserted is formed in the left and right central part of the raised part 8a. 34 is closed by a resin bonnet cover 35 that is detachably locked. A pair of left and right connecting fittings 36 extending from the body frame 33 project upward through a slit 37 formed in the bonnet cover 35, and the driver seat 9 can be turned back and forth on the connecting fitting 36. The pins are connected so that the front and rear positions can be changed. The driver's seat 9 turned to the sitting posture is elastically received and supported by left and right cushion springs 38 attached to the upper surface of the ridge 8a.

  On the right side of the raised portion 8a in step 8, there are a planting lever 41 for moving the seedling planting device 6 up and down and powering the seedling planting device 6 and a sensitivity adjusting lever 42 for adjusting the sensitivity of the planting depth automatic control. Each of them protrudes so as to be swingable back and forth, and a rectangular opening 43 is formed at the rear part of the raised portion 8 a, and the upper half of the fuel tank 44 connected to and supported by the body frame 33 extends upward from the opening 43. It is protruding.

  In addition, on the left and right ends of the raised portion 8a in step 8, a reserve seedling table 45 for placing and supporting the spare seedling F is provided so as to be able to stand up and retract, and in the rear central portion of the raised portion 8a in step 8, A spare seedling storage frame 46 for receiving and supporting F in a horizontally long standing posture is provided. Further, a recoil knob 47 for starting the engine is provided at the right rear portion of the footrest surface in Step 8, and the left side of the raised portion 8a is formed as a flat auxiliary step surface, and a replenishment tank for refueling (Not shown) is used for mounting. In addition, the supply port 44a of the fuel tank 44 is provided to be deviated to the left side so as to approach the supply tank placed on the left side of the raised portion 8a. Further, as shown in FIG. 2, overhanging portions 8b projecting toward the front wheel 1 are formed on the left and right sides of the front portion of the step 8, and mud lifted by the front wheel 1 adheres to the upper surface of the step. Is prevented.

  The left and right central portions at the front end of step 8 are formed with a recessed portion 50 that is released forward, and the recessed portion 50 is blocked by inserting the central front cover 10 erected on the front end portion of the traveling machine body 3 up and down. It has come to be.

  The central front cover 10 is configured in a front-and-back split structure including a front cover portion 10F formed of a resin material and a rear cover portion 10R formed of a sheet metal material, and the lower end of the rear cover portion 10R is a front axle case. The front cover portion 10F is detachably latched and connected to the rear cover portion 10R. Note that the lower end of the front cover portion 10F extends downward so as to cover the bracket 51 from the front.

  The rear cover portion 10R is formed in a half-cylinder shape that is open forward and is given high rigidity, and a steering shaft 52 having the steering handle 11 at the upper end is provided at the upper portion of the rear cover portion 10R. It is rotatably supported via a bearing portion 53. Further, a shift lever 54 for operating a traveling gear transmission mechanism built in the transmission case 21 is provided on the left side of the rear cover portion 10R, and on the right side of the rear cover portion 10R, the engine 7 A hand accelerator lever 55 linked to the accelerator device is provided.

  The lower part of the steering shaft 52 is vertically supported by the bracket 51 so as to be rotatable, and a pinion gear 56 formed integrally with the lower end of the steering shaft 51 is supported by a sect gear 57 supported by the bracket 51. The sect gear 57 and the knuckle arm 58 that rotates the left and right front wheels are interlocked and connected by a tie rod 59.

  As shown in FIG. 3, a pair of left and right operation rods 60 extending rearward from the sect gear 57 are linked to left and right side clutches 27 provided in the transmission case 21 so that the sect gear 57 rotates. When the front wheel 1 is steered to the left or right from the straight position beyond the set angle by being operated, the side clutch 27 of the rear wheel 2 on the inside of the turn is automatically turned off in conjunction with this. A small turn is performed in a three-wheel drive state with the left and right front wheels 1 and the one rear wheel 2 on the outside of the turn.

  The riding type rice transplanter according to the present invention is configured as described above, and the arrangement relationship of each part is set as follows in order to maintain a good weight balance while reducing the size of the aircraft.

  That is, as shown in FIG. 1, the front-rear direction position of the front end of the traveling machine body 3 and the front-rear direction position of the front end of the front wheel 1 substantially coincide with each other in the side view. The driver's seat 9 is arranged in front of the central position a. Further, the front-rear center position a of the rice transplanter overall length L substantially coincides with the front-rear direction position of the rear wheel axis pr (the front-rear center position a of the rice transplanter overall length L is the front side, the rear wheel axis pr is the rear side, or the rice transplanter full length The front-rear center position a of L is the rear side and the rear wheel axis pr is the front side. Furthermore, the front-rear center position b of the center distance W between the front wheel 1 and the rear wheel 2 is close to the front-rear center position d of the driver seat 9 (the front-rear center position d of the driver seat 9 is The front-rear center position b of the center distance W is the front side, or the front-rear center position d of the driver seat 9 is the front side, and the front-rear center position b of the center distance W is the rear side). The engine 7 is deployed in a back-tilt posture with a heavy crankcase 7c forward between the center pr and the longitudinal position.

Overall side view of riding rice transplanter Overall plan view of riding rice transplanter Plan view of traveling system Side view of the rear of the aircraft Front view of fuel tank attachment Longitudinal side view of the front end of the traveling aircraft Exploded perspective view of steps Transverse plan view of the center front cover

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Traveling machine body 6 Seedling planting device 7 Engine 7a Output shaft 9 Driver's seat 21 Transmission case 22 Front axle case L Total length of rice transplanter W Center distance between center a Front and rear center position of total length of rice transplanter b Distance between center Front / rear center position d Front / rear center position of driver's seat pf Front wheel axis pr Pr Rear wheel axis

Claims (6)

A riding-type rice transplanter that includes front and rear wheels driven by an installed engine, and a seedling planting device connected to a rear portion of a traveling machine equipped with a driver's seat so as to be movable up and down,
In a side view, the front-rear direction position of the front end of the traveling machine body and the front-rear direction position of the front wheel front end substantially coincide with each other, and the driver's seat is positioned forward of the front-rear center position of the entire rice transplanter including the seedling planting device. Riding type rice transplanter characterized by being arranged. A riding-type rice transplanter that includes front and rear wheels driven by an installed engine, and a seedling planting device connected to a rear portion of a traveling machine equipped with a driver's seat so as to be movable up and down,
In the side view, the front and rear position of the front end of the traveling machine body and the front and rear direction position of the front wheel front end are substantially matched, and the front and rear center position of the whole rice transplanter including the seedling planting device is substantially the same as the front and rear direction position of the rear wheel axis. Riding type rice transplanter characterized by being allowed.   The riding type rice transplanter according to claim 1 or 2, wherein a front-rear center position of a distance between axial centers of the front wheel and the rear wheel and a front-rear center position of the driver seat are close to each other.   A transmission case that receives the engine and engine power is disposed at a rear portion of a traveling machine body, and a front axle case including the front wheel is a frontmost structure of a transmission structure related to engine power transmission. The riding type rice transplanter as described in any one of 1-3.   The riding type rice transplanter according to any one of claims 1 to 4, wherein the engine is arranged between a front-rear direction position of a front wheel axis and a front-rear direction position of a rear wheel axis.   6. The riding type rice transplanter according to claim 5, wherein the engine is mounted in a posture in which an output shaft protrudes sideways, and the cam shaft of the engine is used as an output shaft.

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