JPH08310266A - Riding type rice transplanter - Google Patents

Abstract

PURPOSE: To suppress rotational unevenness and to miniaturize a balance weight by mounting a pulley with flywheel for taking off auxiliary power in a flywheel of an engine, in a riding type rice transplanter of arranging the engine and a seedling planting device before and after a machine body. CONSTITUTION: Power from an engine 3 is transmitted to a multiple disk main clutch 9 through a coupling 8 made to pass under a radiator 5, thereafter to be transmitted to a static hydraulic continuously variable transmission 11 in a rear part through a transmitting shaft 10. Here an auxiliary power taking off pulley 18 of driving an oil hydraulic pump 17 for supplying operating oil is mounted on a flywheel 16 of the engine 3. A flywheel 18a as a connecting part relating to the flywheel 16 is additionally provided in the auxiliary power taking off pulley 18. Thus by utilizing the auxiliary power taking off pulley 18, moment of inertia of the flywheel 16 is increased to suppress rotational unevenness of the engine 3 when rotated at a low speed, also to miniaturize a balance weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type rice transplanter in which a seedling planting device is connected to a rear portion of a traveling body having an engine mounted on a front portion of the body.

[0002]

2. Description of the Related Art Generally, in an engine, the rotational torque of a crankshaft fluctuates due to fluctuations in pressure of explosive gas and fluctuations in inertial force at the reciprocating portion of a piston. Therefore, a flywheel is provided as a means for absorbing fluctuations in the rotational torque of the crankshaft and reducing fluctuations in the rotational speed of the crankshaft, and the inertial force of the flywheel is used to absorb the fluctuations in rotational torque, thereby rotating the crankshaft. It is designed to reduce speed fluctuations. That is, the uneven rotation of the engine is suppressed.

A conventional riding type rice transplanter is disclosed in Japanese Patent Laid-Open No. 7-
As disclosed in Japanese Patent No. 52668, a lateral engine with its output shaft oriented in the lateral direction of a machine body is transmitted to an input shaft of a traveling mission case via a belt transmission device, and the traveling mission case transmits wheels, seedling planting devices, etc. Power is transmitted to each device.

[0004]

The flywheel of the engine is provided with a size suitable for the engine. However, when the rotational speed of the engine is reduced, the inertial force is reduced to cause uneven rotation of the engine. Is inevitable,
Engine vibration increases. In order to suppress the vibration of the engine, it is sufficient to support the engine against the body frame in a vibration-proof manner, but torque fluctuations of the crankshaft are unavoidable, and there is a disadvantage that the transmission system is adversely affected.

In recent years, there has been a demand for the development of 8-row or 10-row planting rice transplanters capable of highly efficient rice planting work. In such a multi-row rice transplanter, Japanese Patent Application Laid-Open No. 7-5266
As shown in Japanese Patent Publication No. 8, as in the case of a rice transplanter planted with four rows or six rows, when the power is transmitted from the lateral engine to the input shaft of the traveling mission case via the belt transmission, slippage occurs in the belt transmission. However, there is an inconvenience in that transmission loss occurs. To deal with this situation,
It suffices to mount the engine in the front-rear direction and transmit it from the engine to the input shaft of the traveling mission case via the multi-plate main clutch, but mount a large horsepower engine such as a water-cooled diesel engine in the front part of the body. Then,
There is an inconvenience that the front view is blocked by a radiator arranged in front of or behind the engine. In other words, when transmitting the output of the engine to the transmission of the transmission case at the rear of the fuselage via the main clutch, if the radiator is placed in front of the engine, the height of the front part of the engine bonnet that covers the driving part becomes higher and the front part becomes higher. On the contrary, if the radiator is placed at the rear of the engine, the radiator must be placed above the main clutch housing directly connected to the engine. There is an inconvenience that the view is blocked.

A first object of the present invention is to perform vibration during low speed engine rotation while suppressing torque fluctuation of the crankshaft.

A second object of the present invention is to improve the forward visibility even when a large engine such as a water-cooled diesel engine is mounted on the front part of the machine body.

[0008]

According to a first aspect of the present invention, a flywheel of an engine is equipped with a flywheel pulley for extracting auxiliary power.

According to a second aspect of the present invention, a radiator is arranged at a rear portion of the engine, and an output shaft of the engine is transmitted to a main clutch by submerging under the radiator, and the transmission shaft is transmitted from the main clutch. It is configured so that it can be transmitted to a transmission device at the rear of the machine body via the transmission.

[0010]

According to the first aspect of the present invention, the moment of inertia of the flywheel of the engine is increased, and fluctuations in the torque of the crankshaft are avoided, and uneven rotation at low engine speeds is suppressed.

Further, the auxiliary power take-off pulley can be used in place of the balance weight, and the balance weight at the front part of the machine body, which is balanced with the seedling planting device at the rear part of the machine body, can be downsized.

According to the second aspect of the present invention, since the output shaft of the engine is transmitted under the radiator to the main clutch, the height at which the radiator is arranged can be lowered, and the engine can be lowered. Even if a radiator is arranged at the rear of the vehicle, the front view is not obstructed.

[0013]

According to the present invention as set forth in claim 1, it is possible to suppress the rotational unevenness at the time of low speed rotation of the engine and to downsize the front balance weight by utilizing the pulley for taking out the auxiliary power. Further, as a means for suppressing the uneven rotation of the engine, the cost can be reduced by using the pulley for taking out the auxiliary power, as compared with the case of increasing the flywheel of the engine to increase the moment of inertia.

According to the second aspect of the present invention, even if a large water-cooled engine is mounted on the front part of the machine body, the radiator does not obstruct the forward field of view and the maneuvering is facilitated.

[0015]

FIG. 1 shows a rear-mounting type rice transplanter in which a seedling planting device as a working device is connected to the rear part of the machine body. The passenger rice transplanter is equipped with a parallel four-link mechanism 1 at the rear part of the traveling machine body A. The seedling planting device B is connected via the hydraulic cylinder 2 and can be moved up and down via the hydraulic cylinder 2.

As shown in FIG. 3, in the passenger rice transplanter, a reciprocating diesel engine 3, a fan 4 and a radiator 5 are arranged in this order at the front part of the machine body, and a front bonnet 6 for improving front visibility is provided. Cover with
It is configured as a front blowing type that sucks engine cooling air from an intake port 7a provided in the control box 7 and blows it out to the front of the machine body so that the hot air of the engine cooling air does not hit the operator. Further, the engine 3 is arranged in a downwardly inclined rearward posture, and by lowering the height of the radiator 5, the rear height of the bonnet 6 is lowered to improve the front view.

As shown in FIG. 4, the power from the engine 3 is transmitted to a multi-plate type main clutch 9 via a coupling 8 which is submerged under the radiator 5, and the power from the main clutch 9 is transmitted to a transmission shaft 10. It is transmitted to the hydrostatic continuously variable transmission 11 on the rear side through. The coupling 8 is a cylindrical transmission shaft 8
a is provided with couplings 8b and 8b at the front and rear ends thereof, and the couplings 8b and 8b are attached to the end portions of the crankshaft 3a of the engine 3 via the flanges 8c and 8c, and the end surface of the fan belt drive pulley 12 and the main clutch. Case 9
The end faces of a are bolted to each other.

As shown in FIG. 1, the power from the hydrostatic stepless transmission 11 is branched by the gear transmission C in the traveling mission case 13, and one of the branched powers is transmitted through the transmission shaft 14. The other power that is transmitted to the seedling planting device B and branched is transmitted to the rear wheels. Then, the power branched from immediately before the rear wheels is transmitted to the left and right front wheels via the transmission shaft 15.

As shown in FIG. 4, a flywheel 16 of the engine 3 is equipped with an auxiliary power take-off pulley 18 for driving a hydraulic pump 17 that supplies hydraulic oil to the hydraulic cylinder 2 for raising and lowering the seedling planting device. ing. The auxiliary power take-off pulley 18 is a pulley provided with a flywheel 18a as a connecting portion for the flywheel 16,
It is integrally formed of cast steel and is bolted to the flywheel 16 of the engine 3.

As shown in FIG. 2, the riding rice transplanter is provided with steps 19 and 19 for getting on and off the bonnet 6 covering the engine 3 so that the person can easily get on and off the ridge. Steps 1 and 1 for getting on and off the left and right
Batteries 20 below the right-hand step 19 of 9
Is arranged, and the fuel tank 21 is arranged below the step 19 for getting on and off the left side. In addition, the left and right steps 19 and 19 are detachable front step portions 19
a, 19a and the rear step portion 19b fixed to the body,
And 19b.

The attachment / detachment structure of the front step portion 19a will be described. As shown in FIGS. 5 and 6, a pair of left and right fixing pins 2 provided on the rear portion of the front step portion 19a.
2 is inserted into a pair of left and right pin holes 23 formed in the front end folding piece of the rear step portion 19b, and is fixed to the lower surface of the front portion of the front step portion 19a in a swingable manner.
4 is inserted from the rear into a rear opening slit of a locking piece 26 provided on the lower folded piece of the front bumper 25, and is detachably fixed via a wing bolt. A grommet 23a is attached to the pair of left and right pin holes 23. Also, the rear step portion 1 of the step 19 for getting on and off the left
A portion of 9b corresponding to the fuel filler port of the fuel tank 21 is configured as a lid 27 that can be swung open / close around the front-rear axis. Further, on the upper surfaces of the left and right steps 19 and 19, the rubber sheet 28 provided with a non-slip protrusion,
28 are laid.

As shown in FIG. 6, at the front end of the bonnet 6, a center mascot 29 having a role as an aim when the marker line is visually observed is installed. The center mascot 10 also serves as a member for locking and unlocking the bonnet 6. To elaborate,
As shown in FIG. 7, in the center mascot 29,
At the time of planting work, with the base end portion of the rod-shaped portion 29a along which it extends in a vertical direction bent, the pivotally supporting shaft portion 30 of the bonnet 6 is fitted so as to be swingable around its axial center along the left-right direction. In addition, a disc spring (not shown) can be frictionally held in three positions, that is, a normal use posture, a lock releasing posture, and a storing posture, which will be described later. Further, a hook 31 elastically biased forward by a winding spring (not shown) is externally fitted to the pivot shaft 30 so as to be swingable. At the front end of the machine frame, the hook 3 is oscillated around the axis.
1 is provided with an engaged portion 32 made of a bar material that can be engaged and disengaged, and a supporting member 33 for supporting the pivot shaft portion 30 on the bonnet 6 is provided in front of the hook 31. A stopper 34 is provided for restricting the swing of the. Further, the hook 31 which is restricted by the stopper 34 and is engaged with the engaged member 32 is provided with a restricting portion 36 for restricting the swing of the arm 35 that swings integrally with the center mascot 29. In the figure, 37 is a receiving seat installed on the upper end of the front end of the machine body frame, and is a member that receives and regulates the lower edge of the front end of the closed bonnet 6.

With the above construction, during normal planting work,
In a normal use posture in which the rod-shaped portion 29a of the center mascot 29 is substantially vertical, the arm 35 is regulated in contact with the regulation portion 36 and held by the disc spring. When the bonnet 6 is opened, the center mascot 29 in the normal use posture is swung to the lower unlocked position, so that FIG.
As shown in FIG. 3, the arm 35 pushes the regulating portion 36 upward and rearward, whereby the hook 31 causes the engaged portion 3 to move.
The bonnet 6 can be opened and operated in a state of being disengaged from 2. Also, this center mascot 28
Is also used as a lock member for maintaining the open state of the bonnet 6. That is, when the hook 37 made of a leaf spring is provided on the upper part of the center mascot 29 and the bonnet 6 is opened, the center mascot 29 is tilted backward from the normal use posture and the hook 37 is hooked on the handle to open the bonnet 6. It is constructed so that it can be maintained in its posture.

[Other Embodiments] The shape and size of the flywheel may be any one that does not cause uneven rotation when the engine rotates at a low speed.

Any pulley may be used for extracting the auxiliary power.

Further, in the above embodiment, the coupling is connected to the output shaft of the engine and the coupling is made to dive under the radiator, but the engine output shaft may be made longer to dive under the radiator. .

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of drawings]

[Fig. 1] Overall side view of passenger rice transplanter

FIG. 2 is a plan view of the same.

FIG. 3 is a schematic side view of a front portion of the airframe.

FIG. 4 is a partially cutaway side view of the transmission system.

FIG. 5 is an exploded perspective view of a step for getting on and off.

FIG. 6 is a vertical side view of the step for getting on and off.

FIG. 7 is a vertical sectional side view showing a lock structure of a center mascot.

[Explanation of symbols]

 3 engine 3a output shaft 5 radiator 9 main clutch 10 transmission shaft 16 flywheel 18 flywheel pulley with flywheel A traveling machine B seedling planting device C transmission

Claims (2)

[Claims] 1. A riding type rice transplanter in which a seedling planting device (B) is connected to a rear portion of a traveling body (A) in which an engine (3) is mounted on a front portion of the engine (3). A riding rice transplanter in which a flywheel (16) is equipped with a flywheel pulley (18) for extracting auxiliary power. 2. A radiator (5) is arranged at a rear portion of the engine (3), and an output shaft (3a) of the engine (3) is made to go under the radiator (5) to make a main clutch (9). 2. The riding rice transplanter according to claim 1, wherein the main type clutch (9) is configured to be capable of being transmitted from the main clutch (9) to the transmission (C) at the rear of the machine body through the transmission shaft (10).