JP4297571B2 - Ride type rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is configured to transmit the shifted power to the left and right front wheels that can be steered and the left and right rear wheels that cannot be steered. Ride type rice transplanter About.
[0002]
[Prior art]
Ride type rice transplanter The wheel drive mode is often used in which the left and right front wheels are driven via a differential mechanism and the left and right rear wheels are driven at a constant speed via side clutches and brakes. As the operation structure, a main clutch pedal for intermittently operating power transmission from the engine to the traveling transmission is provided on the left side of the foot of the boarding driving unit, and a side clutch / brake is provided on the right side of the foot of the boarding driving unit. A pair of left and right side clutch brake pedals are operated in parallel.
[0003]
In the above configuration, the main clutch pedal is depressed to disengage the main clutch, the left and right side clutch brake pedals are simultaneously depressed, the left and right side clutches are disengaged, and the left and right side brakes are braked. The aircraft can be stopped. In addition to steering the front wheel, depressing only one side clutch brake pedal on the inside of the turn, turning off the side clutch on the inside of the turn, and braking the side brake on the inside of the turn Can be turned slightly.
[0004]
Incidentally, if the left and right rear wheels are driven through the differential mechanism in the same manner as the tractor, the driving speed of the left and right rear wheels is automatically changed during turning, and smooth turning can be performed. Since the rotation speed of the left and right rear wheels changes according to the load, in a paddy field where there is unevenness in the tiller and the ground contact load of the left and right rear wheels tends to change greatly, the straightness is reduced, making it difficult to control the aircraft Become. Therefore, straight running is important Ride type rice transplanter The side clutch / brake system is adopted for the left and right rear wheels.
[0005]
[Problems to be solved by the invention]
Equipped with a traveling system with the above structure with excellent straight running performance Ride type rice transplanter Is suitable for working in paddy fields, but has a problem in turning performance at the shore. In other words, when the aircraft is to make a large U-turn at the shore, if the aircraft is turned by depressing the side clutch brake pedal, the rear wheel inside the turn will be fixed by the side brake. As a result, the farming field is greatly damaged, and a problem that the traveling load increases is likely to occur. This tendency was particularly strong in deep fields.
[0006]
In order to stop the aircraft, it is necessary to depress the main clutch pedal deployed on the left side of the foot and the left and right side clutch brake pedals deployed on the right side of the foot, but it is necessary to depress the three pedals, The operation was troublesome. In particular, the left and right side clutch brake pedals must be depressed at the same time, so a separate mechanism is required to connect the left and right side clutch brake pedals with connecting brackets when traveling on the road. Switching operation of the connecting metal fittings is necessary according to traveling, which is a troublesome operation.
[0007]
The present invention has been made by paying attention to such a situation, and can turn lightly without damaging the field, and is excellent in operability when turning the aircraft and stopping the aircraft. Ride type rice transplanter The purpose is to provide.
[0008]
[Means for Solving the Problems]
[Configuration, operation and effect of the invention of claim 1]
[0009]
(Configuration) The invention according to claim 1 is configured to transmit the shifted power to the left and right front wheels that can be steered and the left and right rear wheels that cannot be steered. Ride type rice transplanter In this case, the brakes for braking only the right rear wheel are not provided, and the brakes for braking only the left rear wheel are not provided. A side clutch automatic operation mechanism that operates to turn off the side clutch inside the turn only based on the direction operation. The airframe includes a main clutch, an airframe stop brake, and a single airframe stop pedal, and the airframe stop brake is operated to be braked by an operation of depressing the airframe stop pedal so that the main clutch is disengaged in advance. The stop pedal is linked to the main clutch and the airframe stop brake. There is no pedal to operate only the main clutch. The side clutch automatic operation mechanism and the main clutch being disengaged in advance by the depressing operation of the airframe stop pedal and the airframe stop brake being braked are configured to operate independently of each other.
[0010]
(Operation) According to the above configuration, when the front wheel is steered greatly when the direction of the body is changed at the side of the heel or the like, the side clutch inside the turn is turned off based on the steering operation of the front wheel. According to this, the aircraft turns by driving with the left and right front wheels and the rear wheels on the outside of the turn, and at this time, the rear wheels on the inside of the turn rotate, so that it follows and rotates without difficulty as the aircraft turns. .
[0011]
[0012]
[0013]
[0014]
[0015]
[0016]
[0017]
[0018]
According to the above configuration, the aircraft can be stopped simply by depressing the aircraft stop pedal with one foot, and it has superior operability compared to tractors that depress the main clutch pedal and brake pedal with both feet. It will be a thing. Moreover, the boarding operation part excellent in the habitability with a wide foot can be comprised.
[0019]
[0020]
[0021]
According to the above configuration, braking is always applied with the transmission to the traveling system cut off, so no matter how you depress the aircraft stop pedal, there is no risk of engine stop and excellent operability It will be.
(Effect) Therefore, according to the invention according to claim 1, the side brakes of the left and right rear wheels are abolished so that only one of the side clutches is turned off when turning, so that the side clutch / brake is It is possible to suppress the roughening of the field and the increase in traveling load caused by dragging of the rear wheel inside the turn, which is a problem found in the conventional configuration of turning using, and the turning of the smooth body can be performed lightly.
[0022]
[Configuration, operation and effect of invention of claim 2]
[0023]
(Structure) The invention according to claim 2 is provided with means for adjusting the timing of the disengagement operation of the main clutch and the braking operation of the airframe stop brake in the invention of claim 1.
[0024]
(Operation) According to the above configuration, by setting the timing so that the airframe stop brake works after the main clutch is completely disengaged, the free running state in which only the main clutch is disengaged by half depression of the airframe stop pedal is achieved. Obtainable. Also, set the timing to bring about the so-called half-clutch / half-brake state so that the aircraft stop brake starts to work before the main clutch is completely disengaged, and the aircraft stops without slipping the aircraft when running on slopes. The operation by the pedal can be performed.
[0025]
(Effect) Therefore, according to the invention according to claim 2, the main clutch and the airframe stop brake can be operated by the airframe stop pedal at an arbitrary timing in a form according to the specifications of the airframe, the field conditions to be used, the skill of the driver, etc. It can be operated and a user-friendly operation form can be obtained.
[0026]
[Configuration, operation and effect of invention of claim 3]
[0027]
(Structure) The invention according to claim 3 is the invention according to claim 1 or 2, wherein the airframe stop pedal is arranged at the right foot of the boarding operation section.
[0028]
(Operation / Effect) According to the above configuration, the single airframe stop pedal is used for the left and right side brakes for side brake operation used for stopping the airframe in other work machines such as tractors and conventional riding rice transplanters. Because it is at the same right foot as the pedal, you can drive lightly with a sense of incongruity.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 5 A rowing type rice transplanter is shown. This riding type rice transplanter has a five-row planting seedling planted on the rear part of a riding type self-propelled body 3 having a pair of left and right front wheels 1 that can be steered and a pair of rear wheels 2 that cannot be steered. The apparatus 4 is connected to be movable up and down via a four-link mechanism 5 driven by an elevating cylinder 6, and has a structure in which a fertilizer 7 having a five-row specification is equipped at the rear part of the self-propelled machine body 3.
[0030]
A transmission case 9 provided with a front axle case 9a that pivotally supports the front wheel 1 is connected and fixed to the front part of the body frame 8 of the self-propelled body 3, and the rear wheel 2 is connected to the rear part of the body frame 8. A rear transmission case 10 that supports the shaft is supported in a freely rolling manner. In addition, an engine 11 having a lateral output shaft 11 a is mounted via a vibration-proof rubber 12 at a position near the front of the mission case 9, and a boarding operation unit 13 is provided in a state of being positioned behind the engine 11. ing. The boarding operation unit 13 is provided with a steering handle 14, a driving seat 15, a driving step 24, and the like for steering the front wheel 1.
[0031]
The seedling planting device 4 mounts seedlings for 5 lines and cuts seedlings one by one from the lower end of the seedling platform 16 and the seedling platform 16 which are reciprocated by a set stroke in the left-right direction. It consists of five rotary planting mechanisms 17 for planting, three leveling floats 18 for leveling the planting location, etc., and reserve seedlings for replenishing the seedling platform 16 in multiple stages. Spare seedling platforms 49 to be placed and accommodated are arranged on the left and right of the front part of the aircraft.
[0032]
The fertilizer application device 7 is mounted on the self-propelled aircraft 3 between the driver seat 15 and the seedling planting device 4, and sets a fertilizer hopper 19 for storing powdered fertilizer and a fertilizer in the fertilizer hopper 19. A feeding mechanism 20 that feeds out by quantity, an electric fan 23 that air-feeds the fed fertilizer through a supply hose 22 to a grooving device 21 provided in the leveling float 18 of the seedling planting device 4, and the like.
[0033]
As shown in FIGS. 3 and 4, on the left side surface of the transmission case 9 is a main transmission having a lateral input shaft 41a linked to the output shaft 11a of the engine 11 via a belt transmission device 40. The hydrostatic continuously variable transmission (HST) 41 is connected in a state in which its output is transmitted to the mission case 9 by a laterally oriented shaft, and the input shaft 41a and the output shaft 41b are connected to the front and rear. Has been.
[0034]
The belt transmission device 40 winds a transmission belt 40c between an output pulley 40a attached to the output shaft 11a of the engine 11 and an input pulley 40b attached to the input shaft 41a of the hydrostatic continuously variable transmission 41, and this transmission belt. A tension pulley 40d is provided to apply tension to 40c.
[0035]
An input shaft 41 a of the hydrostatic continuously variable transmission 41 is extended to the right through the front portion of the transmission case 9. A main transmission lever 46 for operating the hydrostatic continuously variable transmission 41 is disposed on the left side of the steering handle 14 and moves forward by a swing operation from the neutral to the front of the main transmission lever 46. The speed can be changed, and the reverse speed can be changed by a swing operation from neutral to backward.
[0036]
As shown in FIG. 4, a hydraulic pump 42 driven by the extended end portion of the input shaft 41a of the hydrostatic continuously variable transmission 41 is connected to the right side surface of the mission case 9, and the mission case As shown in FIGS. 3 and 4, a torque generator 43 constituting a hydraulic power steering device interlocked with the handle shaft 14 a of the steering handle 14 and a working device for controlling the elevating cylinder 6 are disposed on the upper surface of 9. A control valve 44 for lifting operation is attached.
[0037]
The transmission case 9 is also used as a hydraulic oil tank, and the lubricating oil in the transmission case 9 is taken out as hydraulic fluid through an oil filter 45 attached to the right side surface of the transmission case 9 so as to be hydrostatic. The pressure oil supplied from the hydraulic pump 42 to the transmission 41 and the hydraulic pump 42 is supplied to the torque generator 43, and then supplied to the elevating cylinder 6 through the control valve 44. The drain oil of the hydrostatic continuously variable transmission 41 is returned to the front axle case 9a communicating with the transmission case 9, and the drain oil from the control valve 44 is directly returned to the transmission case 9. .
[0038]
As shown in FIGS. 5 and 6, in the transmission case 9, the main clutch 50 that intermittently transmits the output from the hydrostatic continuously variable transmission 41, and the output from the main clutch 50 are divided into high and low two stages. And a differential mechanism 52 that transmits the output from the sub-transmission device 51 to the left and right front wheels 1, and only the forward rotation power of the power branched from the traveling transmission system is provided. A one-way clutch 53 that transmits to the seedling planting device 4, a planting speed change mechanism 54 that changes the power from now on, a planting clutch 55 that intermittently transmits power to the seedling planting device 4, etc. Equipped.
[0039]
The main clutch 50 employs a multi-plate type, and a drive-side boss member 58 rotates integrally with an input shaft 57 connected to an output shaft 41b of the hydrostatic continuously variable transmission 41 via a coupling 56. The driven drum 60 covering the driving boss member 58 is connected to and supported by the clutch output shaft 59 that is loosely fitted to the input shaft 57 so as to be integrally rotatable. 59 and the driven drum 60 are shifted with respect to the driving boss member 58, and the friction plates 61 interposed between the driving boss member 58 and the driven drum 60 are pressed or released from the driving side. The friction transmission of power from the boss member 58 to the driven drum 60 is configured to be interrupted, and the clutch output shaft 59 and the driven drum 60 are always pressed against the friction plate. It urged by (clutch engaging direction) the spring 62.
[0040]
The main clutch 50 can be turned on and off only by pedal operation. In other words, the airframe stop pedal 25 provided at the right foot position of step 24 in the boarding operation unit 13 and the upper surface of the mission case 9 are penetratingly mounted so as to be rotatable around the vertical axis P perpendicular to the input shaft 57. A clutch operating shaft 63 is interlocked and connected, and a rotating arm 27 is attached to a pedal shaft 26 that rotates integrally with the machine body stop pedal 25. The rotating arm 27 and the clutch operating shaft 63 project outside the case. And the passive arm 63a provided on the clutch is linked to each other by the rod 28, and the clutch operating shaft 63 is rotated in the forward and reverse directions when the body stop pedal 25 is depressed and released. ing.
[0041]
An eccentric cam 63b having a semicircular cross section formed by cutting away a part of the circumferential surface is formed at the front end of the clutch operating shaft 63 in the case, and this eccentric cam 63b is formed on the end surface of the clutch output shaft 59. Opposed. In the normal state in which the fuselage stop pedal 25 is not depressed, as shown in FIG. 5, the eccentric cam 63 b is in a posture in which the pressure against the clutch output shaft 59 is released, and this brings about an “on” state of the main clutch 50. It is. Further, when the fuselage stop pedal 25 is depressed, the edge portion of the eccentric cam 63b is displaced and pressed against the end face of the clutch output shaft 59, and the clutch output shaft 59 is moved against the urging by the spring 62, and the driven side When the drum 60 is displaced rightward in the figure, the main clutch 50 is switched to the “disengaged” state. In this clutch disengaged state, the friction between the edge portion of the eccentric cam 63 b and the end face of the clutch output shaft 59 gives resistance to the rotation of the clutch output shaft 59, and the clutch output shaft 59 rotates with the input shaft 57. Is to be prevented.
[0042]
The auxiliary transmission 51 is of a gear shift type, and the transmission input shaft 64 is positioned in the axial direction in a state in which a large-diameter transmission gear 65 for high speed and a small-diameter transmission gear 66 for low speed rotate together. The transmission output shaft 67 is engaged with the large-diameter transmission gear 65 and the small-diameter gear portion 68 is engaged with the small-diameter gear portion 68. The low-speed position is engaged with the small-diameter transmission gear 66 and the large-diameter gear portion 69 is interlocked. A shift gear 70 that can be shifted to a neutral position that is not allowed to rotate is mounted so as to rotate integrally. The clutch output shaft 59 is mounted in a state where a small-diameter output gear 71 that meshes with and engages with the large-diameter transmission gear 65 and rotates and transmits the power is integrally rotated, and the transmission input shaft 64 is interlocked with the clutch output shaft 59 and decelerated. ing. An auxiliary transmission lever 47 for operating the auxiliary transmission 51 is arranged on the left side of the driver seat 15.
[0043]
The differential mechanism 52 is configured to be capable of differential lock. That is, a shift member 74 is attached to one of the differential shafts 72 extending to the left and right so as to be rotatable integrally with the differential shaft 72 and shiftable. As shown in FIG. The state of being separated from 73 is a normal diff-lock release state, and the shift member 74 is shifted rightward in the drawing and engaged with the end face of the diff case 73 to bring about a diff-lock state. The differential lock operation means for switching the differential mechanism 52 between the differential lock state and the differential lock release state is configured such that the shift member 74 is urged by a spring (not shown) to the differential lock release position, and the rear left side of the foot in the riding operation unit 13 The diff lock pedal 48 and the shift member 74 are interlocked and connected to each other, and the diff lock release state is maintained by releasing the foot from the diff lock pedal 48 during normal driving, so that the vehicle body can be taken in and out of the field and the transport vehicle. In the case of loading / unloading the fuselage onto / from the loading platform, the diff lock pedal 48 is depressed with the left foot to bring about a diff lock state, and the left and right front wheels 1 can be driven at a constant speed.
[0044]
The differential case 73 of the differential mechanism 52 has a gear integrally formed with an input gear 76 that meshes with a transmission output gear 75 that is splined to the transmission output shaft 67 and a main transmission shaft 77 for transmission to the rear wheel 2. An output gear 79 is attached to 78.
[0045]
The one-way clutch 53 is provided so that only the forward rotation of the rotation of the transmission input shaft 64 is transmitted to the planting transmission system with the transmission input shaft 64 as a branch point from the traveling transmission system to the planting transmission system. ing.
[0046]
The planting speed change mechanism 54 is mounted on the speed change output shaft 67 so as to be freely rotatable only relative to the output shaft 80 of the one-way clutch 53 via a gear 81. A group of driven gears 87 which are always engaged with and interlocked with the planting shift output shaft 86 which is mounted in a state of rotating integrally with the planting gear 83 and interlocked with the planting clutch 55 via bevel gears 84 and 85. Is mounted so as to be relatively rotatable, and a transmission ball 89 for interlockingly connecting the driven gear 87 to the planting transmission output shaft 86 by engaging with an engaging recess 88 formed in the center hole of each driven gear 87 is a planting transmission output. The structure is provided with an operation shaft 90 that is provided so as to rotate integrally with the shaft 86 and that selectively engages the transmission ball 89 with the engaging recess 88. In other words, the driven gear 87 is selectively coupled to the planting shift output shaft 86 so that the driven gear 87 used for transmission is changed to perform a shift of a plurality of stages (in the example, six stages). Has been.
[0047]
As shown in FIGS. 7 to 9, the rear transmission case 10 for driving the rear wheels includes a lateral transmission case portion 10 </ b> A supported on the body frame 8 so as to be able to roll around the longitudinal axis X within a certain range, and its left and right sides. It is comprised from the deceleration case part 10B connected with each both ends. In the lateral transmission case portion 10 </ b> A, a lateral transmission shaft 93 that distributes the power from the main transmission shaft 77 extending rearward from the mission case 9 to the left and right is built in, and the lateral transmission shaft 93 and the main transmission shaft 77. Are linked together via bevel gears 91 and 92. Each reduction case portion 10B is equipped with an axle 2A that supports the rear wheel 2 and a reduction gear mechanism 94 that links the lateral transmission shaft 93 and the axle 2A with a reduced speed.
[0048]
A transmission system for the rear wheel 2, specifically, a multi-plate type side clutch that separates the transmission to the rear wheels 2 separately between both ends of the lateral transmission shaft 93 and the reduction gear mechanisms 94. 96 is interposed. These side clutches 96 include a boss member 96A that is spline-fitted to the lateral transmission shaft 93 and rotates integrally, and is movable in the axial direction, and a driven drum 96B that is linked to the reduction gear mechanism 94, and includes a boss member 96A. A plurality of friction plates 96C are brought into pressure contact with each other by moving the fuselage laterally outward to engage the friction (with clutch), and release the frictional interlock (clutch disengagement) by moving the boss member 96A laterally inward of the fuselage. A clutch spring 96D that is distributed and attached to 96A and the driven drum 96B and moves and urges the boss member 96A toward the clutch engagement side is externally attached to the transmission shaft 93.
[0049]
The reduction gear mechanism 94 is disposed on the lateral outer side of the driven drum 96B of the side clutch 96, and has a small-diameter first gear G1 that rotates integrally with the driven-side drum 96B, and a large-diameter second gear G2 that meshes with the first gear G1. And a third gear G3 having a small diameter and a wide width which is coaxial with the second gear G2 and rotates integrally therewith and a fourth gear G4 having a large diameter and a wide width which is connected to the axle 2A. Yes, by arranging the gear pair of the third gear G3 and the fourth gear G4 on the inner side of the fuselage so as to be pushed into the lower side of the side clutch 96, the reduction case 95 is suppressed from being widened laterally outward. Yes.
[0050]
In addition, as shown in FIG. 8, an airframe stop brake 30 is provided between the right deceleration case portion 10B and the boss member 96A. The fuselage stop brake 30 presses the friction plate 31 that is externally attached to the outer periphery of the boss member 96A and the friction plate 32 that is engaged with the inner periphery of the speed reduction case portion 10B and stops the rotation. The member 96A and the lateral transmission shaft 93 that rotates integrally with the member 96A are braked, and the cup-shaped operation member 33 loosely fitted to the boss member 96A moves laterally outward (rightward in FIG. 8). As a result, the friction plates 31 and 32 are brought into pressure contact with each other.
[0051]
The airframe stop brake 30 is operated by a brake operation shaft 34 that is rotatably attached to the upper surface of the deceleration case portion 10B around the vertical axis P1. In other words, a shift fork 35 is attached to a portion of the brake operation shaft 34 that enters the case, and the shift fork 35 is disposed opposite to the end surface of the operation member 33, and the brake operation shaft 34 is rotated. The operating member 33 can be shifted via the shift fork 35 to brake the boss member 96A.
[0052]
As shown in FIG. 7, the operation arm 34 a provided on the case protruding portion of the brake operation shaft 34 is linked to the machine body stop pedal 25 via the linkage rod 36, and the machine body stop pedal 25 is depressed. In association with the operation, the linkage rod 36 is pulled and displaced forward, and the airframe stop brake 30 is braked. When the airframe stop pedal 25 is released and returned to the original posture, the brake of the airframe stop brake 30 is released. It has become so. Here, since the fuselage stop pedal 25 is also linked to the main clutch 50 as described above, it functions as a main clutch / brake pedal. Thus, braking is applied by the subsequent depressing operation.
[0053]
The linkage rod 36 is provided with a turnbuckle 36a, and the operation timing of the body stop brake 30 with respect to the main clutch 50 can be adjusted by adjusting the expansion and contraction of the turnbuckle 36a.
[0054]
The operation structure of the side clutch 96 is configured as follows. In other words, the clutch operating sleeve 102 that is disposed in abutment with the end face of the boss member 96A via the thrust collar 103 is slidably fitted to the lateral transmission shaft 93 and slidably fitted to the upper surface of the deceleration case portion 10B. The clutch operation shaft 104 is rotatably mounted on the clutch operation shaft 104, and an eccentric cam 105 formed at the inward end of the clutch operation shaft 104 is disposed opposite to the end surface of the clutch operation sleeve 102. The side clutch 96 is turned on and off by a moving operation.
[0055]
The left and right side clutches 96 are automatically turned off only on the inner side of the turn based on the aircraft steering operation, and the side clutch automatic operation mechanism 106 is configured as follows. . That is, as shown in FIG. 7, the pitman arm 111 swingably driven left and right by the torque generator 43 constituting the power steering device and the knuckle arm 118 of each front wheel 1 are interlocked and connected via the tie rod 119. A steering link mechanism 110 is configured, and an operation fitting 111a provided continuously with the pitman arm 111 and a relay arm 113 provided so as to be swingable about a longitudinal axis Y at a lower portion in the vicinity of the front and rear of the airframe are pushed and pulled. 112, the left and right ends of the balance arm 115 connected to the upper end of the fulcrum shaft 114 of the relay arm 113, and the operation arms 104a connected to the case outer protrusions of the left and right clutch operation shafts 104 respectively connect the rods 116. Are linked together. It should be noted that the rear end of the rod 116 and the operation arm 104a are elongated pin pins so that the operation arm 104a is swung by the forward displacement of the rod 116, and the operation arm 104a is not swung by the rearward displacement of the rod 116. It is linked.
[0056]
Here, the connection hole 117 with the push-pull rod 112 formed on the operation fitting 111a provided continuously with the pitman arm 111 is formed as a long hole along the swinging direction of the operation fitting 111a, and the pitman arm 111 advances straight. The length of the linkage hole 117 is such that the swing of the pitman arm 111 is transmitted to the push-pull rod 112 only when it swings more than a set angle (for example, 30 °) from the posture, but the swing less than the set angle is not transmitted. Is set.
[0057]
Therefore, when the left and right front wheels 1 are steered more than a set angle in order to make the airframe largely turn, the swing of the pitman arm 111 is transmitted to the balance arm 115 via the relay arm 113 and is pulled forward. Only one side clutch 96 linked to 116 is turned off. That is, only the side clutch 96 on the inner side of the turning is operated to turn, and the body turns by the three-wheel drive of the left and right front wheels 1 and the rear wheel 2 on the outer side of the turning. As the vehicle turns, the vehicle rotates following the ground contact, and the vehicle body is turned by the rear wheel 2 inside the turn without unduly roughening the field.
[0058]
[Brief description of the drawings]
[Fig. 1] Overall side view of a riding rice transplanter
[Figure 2] Overall plan view of the riding rice transplanter
Fig. 3 Side view of the front part of the self-propelled aircraft
FIG. 4 is a plan view of the front part of the self-propelled aircraft
FIG. 5 is a sectional view showing a part of the transmission mechanism in the mission case.
FIG. 6 is a sectional view showing a part of a transmission mechanism in a mission case.
[Figure 7] Operation system diagram
FIG. 8 is a longitudinal rear view showing the right part of the rear transmission case.
FIG. 9 is a longitudinal rear view showing the left part of the rear transmission case.
[Explanation of symbols]
1 front wheel
2 Rear wheels
13 Boarding operation
25 Aircraft stop pedal
30 Airframe stop brake
36a Adjustment means
50 Main clutch
96 side clutch
106 Side clutch automatic operation mechanism

Claims (3)

In the riding type rice transplanter configured to transmit the shifted power to the left and right front wheels which can be steered and the left and right rear wheels which cannot be steered ,
Without a brake that brakes only the right rear wheel, without a brake that brakes only the left rear wheel, each has a friction side clutch corresponding to the left and right rear wheels,
With a side clutch automatic operation mechanism that operates to cut the side clutch inside the turn only based on the steering operation of the front wheel,
The airframe includes a main clutch, an airframe stop brake, and a single airframe stop pedal, and the airframe stop brake is operated to be braked by an operation of depressing the airframe stop pedal so that the main clutch is disengaged in advance. The stop pedal, the main clutch and the airframe stop brake are interlocked and connected, and there is no pedal for operating only the main clutch.
The side clutch automatic operation mechanism and the main clutch being disengaged in advance by the depression of the airframe stop pedal and the airframe stop brake being braked are configured to operate independently of each other. Riding type rice transplanter . The riding type rice transplanter according to claim 1, further comprising means for adjusting a timing of the main clutch disengaging operation and the braking operation of the airframe stop brake. The riding type rice transplanter according to claim 1 or 2, wherein the airframe stop pedal is arranged at a right foot of a boarding operation unit.

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