JP2001112315A - Rice planting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice planting machine capable of eliminating damage to a mud-removing mechanism which is attached to a break mechanism for stopping the machine body when seedlings are loaded and so on. SOLUTION: This rice planting machine is equipped with an auxiliary break mechanism (48) which is used for stopping the machine body and disposed so that the auxiliary break mechanism (48) synchronizes to be operated with a clutch mechanism (109) mounted on a power transmission path (79) from a driving unit (7) to a traveling unit (6), wherein a drive shaft (99) for transmitting power of the driving unit (7) to the traveling unit (6) is mounted on an approximately middle position of the machine body in such a state that the shaft longitudinally extends, and the auxiliary break mechanism (48) is positioned on either of both the right and left sides of the drive shaft (99).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter.

[0002]

2. Description of the Related Art In a conventional rice transplanter, a planting machine is disposed at the rear of a self-propelled traveling body so as to be able to move up and down.
While a traveling section consisting of front and rear wheels and an interlocking mechanism is arranged at the bottom of the body frame, a motor section consisting of an engine and a transmission is arranged at the front of the body frame, and power is transmitted from the motor section to the traveling section. A clutch mechanism is provided in the path, and an auxiliary brake mechanism is interlocked to the clutch mechanism via a clutch-brake interlocking mechanism.

[0003] The clutch-brake interlocking mechanism has a body running posture in which the clutch mechanism is connected and the auxiliary brake mechanism is released to allow the running body to run for normal planting operation, and a clutch mechanism. When the cutting machine is in the cutting state and the auxiliary brake mechanism is in operation, and the traveling machine is stopped to perform seedling connection work, or when crossing ridges or loading / unloading trucks, the machine is There is an interlocking operation lever that can change the attitude to the aircraft stop attitude to stop the operation.

[0004] At the time of running or planting work, the interlocking operation lever is set to the body running posture, and the body is run. At the time of loading / unloading, the interlocking operation lever was changed to the aircraft stop posture to stop the aircraft.

In such a conventional rice transplanter, a transmission case is connected to the engine, a front and rear axle case is connected to the transmission case, and a pair of left and right wheels are connected to each axle case. A clutch mechanism and an auxiliary brake mechanism are interposed between the transmission case and the transmission case, respectively.

[0006]

However, in the conventional rice transplanter described above, the auxiliary brake mechanism is provided on the pulley portion on the input shaft of the transmission case, and is not exposed to the outside. Since there is not enough space for maintenance, the auxiliary brake mechanism could not be easily repaired or inspected from the outside of the fuselage, resulting in poor maintainability.

[0007]

In view of the above, the present invention has an auxiliary brake mechanism for stopping the machine body. The auxiliary brake mechanism is provided on a clutch mechanism provided on a power transmission path from a motor unit to a traveling unit. In a rice transplanter configured to operate in conjunction with each other, a drive shaft for transmitting the power of a prime mover unit to a traveling unit is disposed at a substantially central portion of the fuselage in a state in which the drive shaft extends in the front-rear direction. An auxiliary brake mechanism is provided at one of the left and right sides of the drive shaft.

An auxiliary brake mechanism for stopping the body is provided, and the auxiliary brake mechanism is configured to operate in conjunction with a clutch mechanism provided on a power transmission path from the motor unit to the traveling unit. In a rice transplanter, a drive shaft for transmitting the power of the prime mover section to the traveling section is disposed in a substantially central portion of the fuselage so as to extend in the front-rear direction, and at one of the left and right sides of the drive shaft. , While a foot-type brake pedal is provided at the other side of the drive shaft.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rice transplanter according to the present invention has an auxiliary brake mechanism for stopping an airframe, and the auxiliary brake mechanism is provided on a clutch mechanism provided on a power transmission path from a motor unit to a traveling unit. It is configured to work in conjunction.

In addition, a drive shaft for transmitting the power of the prime mover unit to the traveling unit is disposed substantially in the center of the fuselage in a state of extending in the front-rear direction, and one of the right and left sides of the drive shaft is provided. Since the auxiliary brake mechanism is arranged at the position, the drive shaft does not become a hindrance when assembling or disassembling the auxiliary brake mechanism, and the assemblability and maintenance of the auxiliary brake mechanism can be improved. is there.

In addition, a space is formed on the opposite side of the drive shaft from the auxiliary brake mechanism, and a foot-type brake pedal can be disposed in the space. Thus, the body can be made more compact.

In particular, a drive shaft for transmitting the power of the prime mover unit to the traveling unit is disposed in a substantially central portion of the fuselage so as to extend in the front-rear direction, and at one of the right and left sides of the drive shaft. By arranging the auxiliary brake mechanism at the position and arranging the foot-type brake pedal at the other side position of the drive shaft, the space under the fuselage can be used effectively and the fuselage can be made compact. Is what you can do.

In addition, the drive shaft does not hinder the assembling or disassembly of the auxiliary brake mechanism and the foot-type brake pedal, and the assemblability and maintenance of the auxiliary brake mechanism and the brake pedal can be improved. is there.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the riding rice transplanter 1 according to the present invention has a planting machine 3 connected via a lifting mechanism 4 to a rear part of a traveling machine body 2 configured to be self-propelled. I have.

As shown in FIG. 1, the traveling body 2 has a traveling section 6 provided below the body frame 5 and a motor section 7 provided at the upper front side of the body frame 5. A driving operation unit 8 is disposed immediately behind the vehicle.

As shown in FIGS. 1 and 2, the body frame 5 includes a pair of left and right main pipes 9, 10 extending in the front-rear direction and having a rectangular cross section, and a front end portion of the main pipes 9, 10. A main frame structure 11 having a U-shape in plan view is formed from a front pipe (not shown) having a rectangular cross-section installed in the main frame structure. The connecting rods 12 and 13 are attached downward, respectively, and a pair of left and right cylindrical sub pipes 14 and 15 extended in the front-rear direction and the middle of the sub pipes 14 and 15 are provided at the lower ends of the connecting rods 12 and 13. Cylindrical connecting pipe 16 installed between the parts
And a lower frame component 17 composed of the following. In the figure, reference numeral 18 denotes a connecting pipe having a rectangular cross section.

Further, the body frame 5 is attached to the rear ends of the sub-pipes 14 and 15 between the rear end of the lower frame member 17 and the rear end of the main frame member 11 so as to be inclined forward and upward. A column-shaped rear frame structure 21 composed of a pair of left and right cylindrical rear pipes 19, 19 and a cylindrical upper pipe 20 erected between upper ends of the rear pipes 19, 19 is further provided in series. Is located between the rear frame member 21 and the lower frame member 17 in the middle of the upper pipe 20 and the connecting pipe 16.
An upper frame member 23 composed of a pair of left and right inclined pipes 22 and 22 for connecting the middle part in an inclined manner of front low and rear high. In the figure, reference numeral 96 denotes a gate-shaped seat support pipe provided between the inclined pipes 22 and 22 in the middle.

As shown in FIGS. 1 and 2, the motor unit 7 has a flat plate-shaped engine mounting table 97 between the front sides of the left and right main pipes 9 and 10 of the body frame 5, and the engine mounting table 97 is provided. The engine 25 as the prime mover is mounted on the upper part of the engine, and the transmission case 26 as the transmission mechanism is mounted on the lower part of the engine mounting base 97.
26 are interlocked with each other via a two-stage high-low belt type speed change mechanism 27. The planting machine 3 is operatively connected to the engine 25 via a planting interlocking mechanism 28.

The motor unit 7 transmits the power of the engine 25 to the traveling unit 6 and the planting machine 3 via the transmission case 26.

The motor unit 7 has a fuel tank (not shown) disposed directly above the engine 25 and covers the fuel tank and the engine 25 with a bonnet 29. Spare seedling stands 30, 30 for placing spare seedlings at side positions are provided.

As shown in FIG. 1, the bonnet 29 is mounted on the front upper portion of the main frame structure 11 of the body frame 5 and comprises a front cover body 31 and a rear cover body 32.

As shown in FIG. 1 and FIG. 3, the high-low two-stage belt type speed change mechanism 27 has a large-diameter high-speed output pulley 38 and a small-diameter low-speed output pulley 39 mounted side by side on the output shaft 37 of the engine 25. On the other hand, a small-diameter high-speed input pulley 41 and a large-diameter low-speed input pulley are attached to the input shaft 40 of the transmission case 26.
42 are mounted side by side, a high-speed transmission belt 43 is suspended between the high-speed output pulley 38 and the high-speed input pulley 41, and the low-speed side pulley 39 and the low-speed input pulley 42 are Suspending the transmission belt 44,
High-speed clutch pulley in the middle of high-speed transmission belt 43
45 so that it can be separated
A low-speed side clutch pulley 46 is disposed in the middle of the vehicle so as to be able to contact and separate therefrom.

By selectively pulling only one of the high-speed transmission belt 43 and the low-speed transmission belt 44 by one of the high-speed clutch pulley 45 and the low-speed clutch pulley 46, the transmission case
The 26 input shafts 40 are rotated at a high or low speed so that the traveling speed can be increased or decreased.

As shown in FIG. 1, the traveling section 6 includes a pair of left and right front axle cases 74, 75 on the transmission case 26.
The front axle cases 74 and 75 are linked to the front wheels 76, and the transmission case 26 is linked to the rear axle case 77.
A pair of left and right rear wheels 78, 78 are linked to 77.

In this manner, the power of the engine 25 is transmitted from the engine 25 to the transmission case 26, and transmitted from the transmission case 26 to the front axle cases 74 and 75.
Transmission from the front axle case 75 to the front wheels 76, 76, while transmission from the transmission case 26 to the rear axle case 77
A power transmission path 79 for transmitting the power to the rear axle case 77 and the rear wheels 78, 78 is formed.

The front axle cases 74 and 75 are shown in FIG.
As shown in FIGS. 8 and 9, horizontal axle case components 82 and 83 are connected to left and right side walls 80 and 81 of the transmission case 26 so as to extend in the left and right width direction, respectively. The vertical axle case members 84 and 85 are provided at the lower ends of the vertical axle case members 84 and 85, respectively. The front axles 86, 86 are rotatably disposed toward the right and left outer sides of the vehicle, and a front wheel 76 is attached to the tip of each front axle 86.

The vertical axle case members 84 and 85 are rotatably connected to the distal ends of the horizontal axle case members 82 and 83, and are connected to a steering wheel 87 to be described later via a steering mechanism 88. It is linked to be steerable.

As shown in FIGS. 1, 8 to 10, the steering mechanism 88 has a steering case 24 connected to the rear end of the transmission case 26, and a steering wheel at the top of the steering case 24 and at the front end. The steering shaft 89 to which the 87 is attached is rotatably mounted in a state where the steering shaft 89 is extended in the up and down direction, and is extended in the up and down direction at the base end of the steering shaft 89 at the lower rear end of the steering case 24. The upper end of the steering yoke shaft 90, which is rotatably mounted in this state, is interlocked and connected to the lower end of the steering yoke shaft 90.
The steering yoke 91 is mounted horizontally, and the base ends of a pair of left and right tie rods 92, 93 are connected to the left and right rear ends of the steering yoke 91 so as to be rotatable left and right. , 95 are connected to each other so as to be rotatable left and right, and the middle portions of the vertical axle case members 84, 85 are attached to the distal ends of the knuckle arms 94, 95.

In the steering mechanism 88, a base end of a substantially letter-shaped stay 160 in plan view is attached to a middle part of the steering yoke shaft 90, and a hydraulic cylinder 161 for power steering is mounted at a tip end of the stay 160. The tip of the rod 162 is connected in an interlocking manner, while the sub-step 163 is attached to the main pipe 9 of the main frame structure 11 toward the lower left side of the fuselage. A cylinder support 164 is mounted on the cylinder support 164, and the base end of the hydraulic cylinder 161 is pivotally mounted on the upper portion of the cylinder support 164.

Accordingly, the hydraulic cylinder 161 for power steering is extended substantially in the lateral direction of the body while penetrating between the main pipe 9 of the main frame structure 11 and the sub pipe 14 of the lower frame structure 17. It is disposed in a state where it is in a state of being held, and is disposed immediately above the cylinder support 164.

As described above, since the hydraulic cylinder 161 is disposed so as to extend in the left-right width direction of the body, the longitudinal length of the body can be reduced as much as possible. Since the 161 is disposed directly above the cylinder support 164, the obstacle on the road can be prevented from colliding with the hydraulic cylinder 161 by the cylinder support 164, and the hydraulic cylinder 161 can be prevented from being damaged.

Further, in this embodiment, as shown in FIGS. 1 and 8, the hydraulic cylinder 161 for power steering is disposed at a position immediately behind the transmission case 26.
Since the transmission case 26 is located in front of the hydraulic cylinder 161, the hydraulic cylinder 161 does not collide with the ridge when the ridge is crossed, and damage to the hydraulic cylinder 161 can be prevented.

Further, as shown in FIGS. 1, 8 and 10, since the hydraulic cylinder 161 is disposed above the lowermost end of the transmission case 26, the hydraulic cylinder 161 can be used when an obstacle on a road surface or a ridge is crossed. Does not directly collide with the hydraulic cylinder 161 and the hydraulic cylinder 161 can be prevented from being damaged.

Further, as shown in FIG. 13, the steering mechanism 88 has a substantially L-shaped support 165 mounted on the upper left portion of the steering case 24, and operates the hydraulic cylinder 161 for power steering on the support 165. Valve 166
Is attached via an adapter 167. If the power steering specification is not used, the steering case 24
A substantially L-shaped cover body 158 is attached to the upper left of the.

As described above, since the valve 166 is attached to the steering case 24 via the adapter 167, the steering case 24 can be shared irrespective of whether it is of the power steering type or not, and parts management can be easily performed. In addition, the assemblability and disassembly of the steering case 24 can be improved.

Then, when the steering mechanism 88 steers the steering wheel 87 right and left, the left and right vertical axle case members 84 and 85 and the front wheels 76 and 76 change their posture to the left and right. I have to.

As shown in FIGS. 1, 2 and 11, the rear axle case 77 is supported at the intersection of the rear end of the lower frame member 17 and the lower end of the rear frame member 21. A transmission case with a drive shaft 99 extended in the front-rear direction at the front of the case 77
The rear axle 100 is interlockingly connected to the rear wheels 78, 78 by a rear axle 100 that extends in the left and right sides of the rear axle case 77 in the left and right width direction.

As shown in FIG. 1, the driving operation unit 8 has a steering wheel 87 rotatably disposed on the top of the hood 29, and a seat immediately behind the steering wheel 87.
101 is arranged, and the traveling body 2 is located on the left side of the seat 101.
A gearshift lever 102 for performing a gearshift operation is provided so as to be swingable in the front-rear direction. Elevating / shifting lever 10 for 27 shifting operations
3 is arranged to be swingable in the front-rear direction. In the figure, reference numeral 105 denotes a casing body.

The driving operation unit 8 is provided at a position on the left side of the hood 29 with a clutch-brake interlocking mechanism 106 to be described later.
An interlocking operation lever 107, which is an interlocking operation member provided on the vehicle, is provided so as to be swingable in the front-rear direction, and a clutch pedal 108 is disposed at a position on the left side of the interlocking operation lever 107 so as to be operable. A pair of left and right foot-type brake pedals 168 and 169 are disposed so as to be able to be depressed and operated at the right position of 29, and the base ends of the brake pedals 168 and 169 are rotatably connected to the connecting pipe 16 of the lower frame structure 17. Supported.

The interlocking operation lever 107 is provided on a clutch-brake interlocking mechanism 106, as shown in FIGS.
A clutch mechanism 109 provided at an intermediate portion of a power transmission path 79 from the vehicle to the traveling section 6 and an auxiliary brake mechanism 48 interlockingly connected to the clutch mechanism 109 are interlockingly connected.

As shown in FIGS. 2 to 4, the clutch mechanism 109 has an interlocking shaft 111 mounted on the connecting rod 12 on the left side of the body frame 5 so as to be rotatable back and forth with the axis line extending in the left-right width direction. Two operating plates 112 and 113 extended vertically
At right and left intervals, the base of the interlocking operation lever 107 is attached to the right operating plate 113 so as to be swingable in the left and right width direction, while urging between the left operating plate 112 and the connecting rod 12. The interlocking operation lever 107 is urged forward with a spring 115 interposed therebetween. In the figure, 114 is a biasing spring, 12
4 is a connecting pin, and 125 is a pressing plate.

The clutch mechanism 109 has a clutch pedal shaft 116 mounted on the main pipe 9 on the left side of the body frame 5 so as to be rotatable back and forth with its axis directed in the left-right width direction. A pair of left and right interlocking plates 117, 118 extending in the form of a front-rear, low-rear, and high-inclination are mounted on the right end of the clutch pedal shaft 116 while the base end of the pedal 108 is mounted.
At the lower end of the interlocking plates 117, 118, the base end of a clutch rod 119 extending in the front-rear direction extending between the left and right operating plates 112, 113 is rotatably mounted. A low-speed side engaging pin 121 projecting rightward at the upper right side of the low-speed side wire arm 55; and a high-speed side clutch arm. A high-speed side engaging pin 122 protruding leftward is engaged with the upper left side of 63. In the figure, 139 is the clutch pedal 108 and the main pipe 9
The biasing spring 139 biases the clutch pedal 108 clockwise about the clutch pedal shaft 116 in FIG.

Further, the clutch mechanism 109 is located at the rear of the clutch rod 119 and has left and right operating plates 112 and 113.
The receiver 123 is attached to the position immediately after the.

When the clutch pedal 108 is depressed, the interlocking plates 117 and 118 rotate counterclockwise in FIG. 3 around the clutch pedal shaft 116, and the clutch rod 119 moves rearward. The low-speed clutch arm 55 and the high-speed clutch arm 63 rotate clockwise in FIG. 3 around the clutch support shaft 50, and the high-speed clutch pulley 45 and the low-speed clutch pulley 46 transmit the high-speed transmission, respectively. The clutch mechanism 109 is disengaged from the belt 43 and the low-speed side transmission belt 44 so that the transmission of power from the engine 25 to the transmission case 26 is cut off.

Also, when the interlocking operation lever 107 is operated rearward, the operating plates 112 and 113 rotate clockwise in FIG. 3 around the interlocking shaft 111, and the distal end portions of the operating plates 112 and 113 are received. The body 123 is pressed rearward, and the clutch rod 119 moves rearward accordingly, and the clutch mechanism 109 is disengaged in the same manner as described above, and the power from the engine 25 to the transmission case 26 is transmitted. Transmission is cut off.

On the other hand, when the interlocking operation lever 107 is operated forward, the operating plates 112, 113 rotate counterclockwise in FIG. 3 around the interlocking shaft 111, and the distal ends of the operating plates 112, 113 When the clutch rod 119 moves away from the receiver 123 and moves forward, the high-speed clutch arm 55 or the low-speed clutch arm 63 rotates counterclockwise in FIG. The side clutch pulley 45 or the low speed side clutch pulley 46 approaches the high speed side transmission belt 43 or the low speed side transmission belt 44, and the clutch mechanism 109 is connected, so that power is transmitted from the engine 25 to the transmission case 26. I have to.

As shown in FIGS. 2 to 6, the auxiliary brake mechanism 48 has a brake support bracket 51 attached to a middle part of the sub pipe 14 of the lower frame structure 17, and a base member 52 attached to the brake support bracket 51. Same base member
A boss 53 is attached to the boss 52, a brake support 54 is inserted through the boss 53 so as to be able to move forward and backward, and an arc-shaped brake pad 55 is attached to the tip of the brake support 54, while the drive shaft
At the front of 99, a disk-shaped brake pulley 49 with a brake groove 50 formed on the outer peripheral surface is attached.
55 is configured to be able to freely contact and separate from the brake groove 50 of the brake pulley 49.

As shown in FIG. 7, the brake support 54
The hollow portion of the boss 53 has a cross-sectional shape having flat portions on the left and right sides and arcuate surface portions on the top and bottom, and
The interval between the flat portions of the hollow portion is wider than the interval between the flat portions of the brake support 54, so that the brake support 54 can be rotated slightly around the axis. The position can be adjusted.

The auxiliary brake mechanism 48 is connected with a base end of a substantially L-shaped operating arm 56 rotatably mounted on the brake support bracket 51 at the distal end of the brake support 54, and the same operation is performed. A rear end of a link ball 57 extending in the front-rear direction is pivotally connected to a front end of the arm 56 in a freely rotatable manner, and a brake attached to the front end of the link ball 57 is attached to the right end of the interlocking shaft 111. The connecting body 58 is rotatably and interlockingly connected. In the drawing, reference numeral 59 denotes an urging spring, which urges the brake pad 55 in a direction away from the brake groove 50. Thus, the auxiliary brake mechanism 48 is formed by the brake support 54 and the brake pad 55. Become a brake actor
60 is supported at the left side position of the base member 52,
52 is fixed to the body frame 5 using fixing means 61.

The fixing means 61 is formed by piercing left and right elongated holes 62, 62 at right and left positions of the base member 52 at intervals in the vertical direction. 63 is attached to the brake support bracket 51, and the fixing position of the base member 52 can be adjusted in the left-right direction by long holes 62, 62 provided in the base member 52.

As shown in FIGS. 10 and 11, the drive shaft 99 is composed of a transmission case side shaft 147 interlockingly connected to the rear of the transmission case 26, and a rear axle case.
Axle case side shaft 148 linked to the front of 77
And a connecting shaft 149 interlockingly connected between the two shafts 147 and 148, so as to be able to be divided into three parts. The outer peripheral surface of the transmission case side shaft 147 and the transmission case side shaft 147 and the connecting shaft 149 The brake pulley of the auxiliary brake mechanism 48 is located near the connection
49 is installed. In the figure, 150 and 151 are bevel gears.

As described above, in this embodiment, the drive shaft 99 which is exposed to the outside without disposing the auxiliary brake mechanism 48 inside the transmission case 26 or the rear axle case 77.
Since the auxiliary brake mechanism 48 is provided, the auxiliary brake mechanism 48 can be inspected and repaired without removing or disassembling the transmission case 26 and the rear axle case 77, and maintenance work of the auxiliary brake mechanism 48 can be performed. It can be easy.

Further, since the drive shaft 99 is divided and the auxiliary brake mechanism 48 is provided at a position near the connection portion, the drive shaft 99 is connected to the transmission case 26.
The inspection and repair of the auxiliary brake mechanism 48 can be performed without removing the auxiliary brake mechanism 48 from the rear axle case 77, and the maintenance work of the auxiliary brake mechanism 48 can be further facilitated.

Further, in this embodiment, the transmission case 26 is disposed at a position higher than the rear axle case 77, the drive shaft 99 is inclined forward and backward, and the auxiliary brake mechanism 48 is provided on the upper side thereof. As a result, the auxiliary brake mechanism 48 can be provided as high as possible, preventing mud and soil from adhering to the auxiliary brake mechanism 48, and holding the braking force of the auxiliary brake mechanism 48 well. can do.

As shown in FIGS. 2 to 6, the auxiliary brake mechanism 48 is provided with a mud removing mechanism 64 for removing mud and soil adhering to the brake groove 50 of the brake pulley 49.

The mud removing mechanism 64 has a support pin 65 attached to the left edge of the base member 52, and turns the base end of the support arm 66 extended downward on the support pin 65 in the width direction. A disc-shaped scraper 67 made of an elastic material such as resin or rubber is rotatably mounted on the tip of the support arm 66 so as to be freely movable, and is interposed between the support arm 66 and the brake support bracket 51. The biasing spring 68 presses and biases the scraper 67 toward the brake groove 50 of the brake pulley 49. In the figure, 69 is a retaining pin, and 70 is a support shaft.

As described above, in this embodiment, since the mud removing mechanism 64 for removing mud adhering to the outer peripheral surface of the brake pulley 49 is provided, the mud removing mechanism 64 attaches the mud to the outer peripheral surface of the brake pulley 49. Brake pulley 49 and brake pad 135
, And the braking force of the auxiliary brake mechanism 48 can be satisfactorily held.

Further, no mud or soil is caught between the brake pulley 49 and the brake pad 135, and the breakage of the brake pulley 49 and the brake pad 135 can be prevented.

Further, since the mud removing mechanism 64 is constituted by rotatably providing the scraper 67 on the support arm 66, the frictional resistance between the scraper 67 and the brake pulley 49 can be reduced, and the scraper 67 can be used. Power loss caused by contact with the brake pulley 49 can be reduced.

Moreover, the wear of the outer peripheral surface of the scraper 67 can be reduced, and the life of the scraper 67 can be extended.

Since the scraper 67 made of an elastic material such as resin or rubber is pressed against the outer peripheral surface of the brake pulley 49, the scraper 67 is pressed against the outer peripheral surface of the brake pulley 49.
67 can be brought into close contact, and mud and soil adhering to the outer peripheral surface of the brake pulley 49 can be reliably removed.

The auxiliary brake mechanism 48 is constructed as described above. In this embodiment, the power of the prime mover 7 is
A brake pulley 49 is provided on a drive shaft 99 for transmitting the brake to the brake pulley 49, and a brake operating body 60 is provided on the outer circumferential surface of the brake pulley 49 so as to be able to freely contact with and separate from the brake pulley 49. Since a scraper 67 for removing mud adhering to the outer peripheral surface of the pulley 49 is provided, and the brake operating body 60 and the scraper 67 are supported by the same base member 52, the brake operating body 60 and the scraper 67 Can be compactly and integrally assembled into a unit.
Just attach the brake actuator 60 to the fuselage frame 5.
And the scraper 67 can be mounted, so that the workability of assembling the rice transplanter 1 can be improved.

Further, when the base member 52 is mounted on the body frame 5, the brake operating body 60 and the brake pulley 49
By simply adjusting the position of the rice transplanter 1 and the scraper 67, the positions of the brake pulley 49 and the scraper 67 can be adjusted.

In this embodiment, since the brake operating body 60 and the scraper 67 are disposed at the left side position of the base member 52, the right side position of the base member 52 is fixed with a jig or the like. Since the brake operating body 60 and the scraper 67 can be assembled, the workability of assembling the unitized brake operating body 60 and the scraper 67 can be improved.

In particular, in this embodiment, since the fixing means 61 for fixing the base member 52 to the body frame 5 is disposed at a position on the right side of the base member 52, the unit is unitized in the body frame 5. Brake operating body 60 and scraper 67
When assembling and disassembling, the fixing means 61 can be visually observed without being interrupted by the brake operating body 60 and the scraper 67, and the assembling workability and the maintainability of the rice transplanter 1 can be improved.

Further, since the fixing means 61 is configured so that the fixing position of the base member 52 can be adjusted, the positioning of the brake operating body 60 and the brake pulley 49 can be easily performed. In addition, assembling workability and maintainability of the rice transplanter 1 can be improved.

When the interlocking operation lever 107 swings rearward, the link ball 57 and the operating arm 56 are interlocked with each other, and the brake operating body 60 is turned to the brake pulley 49. The brake pad 55 presses the brake groove 50 of the brake pulley 49, thereby stopping the rotation of the drive shaft 99 and stopping the machine.

At this time, before the brake pad 135 presses the brake groove 50 and the auxiliary brake mechanism 48 operates, the distal ends of the operation plates 112 and 113 press the receiver 123 backward, and the clutch rod 119 moves. The clutch mechanism 109 is moved rearward so as to be in a disconnected state.

In this embodiment, since the brake connecting body 58 and the operating arm 56 are connected to each other by the link ball 57, the length of the link of the link ball 57 is adjusted so that the clutch mechanism 109 and the auxiliary The timing of the operation with the brake mechanism 48 can be adjusted.

As shown in FIG. 6, a wedge-shaped brake pad 55 is formed in a brake groove 50 of a brake pulley 49.
, The rotation of the drive shaft 99 is stopped, so that a large braking force is generated by a small operation load.

Further, the brake groove of the brake pulley 49
The range of movement of the brake operating body 60 can be reduced by pressing the brake operating body 60 against the 50 by linear motion, so that the auxiliary brake mechanism 48 can be made compact and the brake pad 55 can be prevented from being worn. ing.

On the other hand, when the interlocking operation lever 107 is swung forward, the brake pad 135 separates from the brake groove 50, the auxiliary brake mechanism 48 is released, and the distal ends of the operating plates 112, 113 are received by the receiver. The clutch mechanism 109 is brought into a connected state away from the position 123.

As described above, the interlocking operation lever 107 brings the clutch mechanism 109 into the connected state, and the auxiliary brake mechanism
The attitude can be changed between an aircraft running attitude (140) for releasing the 48 and an aircraft stopping attitude (141) for disengaging the clutch mechanism 109 and activating the auxiliary brake mechanism 48 ( (See FIG. 1).

As shown in FIGS. 2 and 4, the interlocking operation lever 107 is inserted into an L-shaped guide hole 143 formed in a guide plate 142 attached to the left main pipe 9, and is provided with the same guide. Along the hole 143, the attitude is changed between the airframe running attitude (140) and the airframe stopping attitude (141). In the figure, reference numeral 144 denotes a bracket.

That is, when changing the attitude of the interlocking operation lever 107 from the airframe running attitude (140) to the airframe stopping attitude (141), the interlocking operation lever 107 is turned rightward after turning the interlocking operation lever 107 rightward. The swing operation is performed so that the interlocking operation lever 107 is held in the airframe stop posture (141) in a state where the interlocking operation lever 107 is stood upright upward. In addition, guide hole
The middle portion of the interlocking operation lever 107 is locked by the locking projection 145 of 143 so that the interlocking operation lever 107 does not swing leftward.

On the other hand, when the interlocking operation lever 107 is
When changing the attitude from (141) to the aircraft running attitude (140), rotate the interlocking operation lever 107 once to the rear, swing it to the left, and then turn it forward. By performing the moving operation, the interlocking operation lever 107 is held in the body running posture (140) in a state of being inclined to the upper left.

The auxiliary brake mechanism 48 is located downstream of the transmission case 26 and upstream of the rear axle case 77 in a power transmission path 79 for transmitting the power of the engine 25 from the engine 25 to the rear wheels 78, 78. Is provided.

Conventionally, the auxiliary brake mechanism 48 is provided between the engine 25 and the transmission case 26, that is, since the auxiliary brake mechanism 48 is provided on the power transmission path 79 upstream of the transmission case 26, the transmission case If the transmission mechanism in 26 is set to neutral,
Even if the auxiliary brake mechanism 48 is operated, the front and rear wheels 76, 76,
Although the rotation of 78 and 78 could not be stopped and the aircraft could not be reliably stopped on an inclined surface such as a slope, in the present embodiment, the power transmission path 79 Since the auxiliary brake mechanism 48 is also provided on the downstream side, even if the transmission mechanism in the transmission case 26 is in a neutral state, the front and rear wheels 76, 7
6, 78, 78 can be stopped, and the aircraft can be reliably stopped even on an inclined surface such as a slope.

In this embodiment, since the auxiliary brake mechanism 48 is provided on the power transmission path 79 upstream of the rear axle case 77, the left and right wheels 78, 78 are stopped by one auxiliary brake mechanism 48. And a lower braking torque than when the auxiliary brake mechanism 48 is provided on each of the left and right rear axles 100.
48 can be activated, so the auxiliary brake mechanism 48
Can be simplified, the operating force of the interlocking operation lever 107 can be reduced, and the operability can be improved.

As shown in FIGS. 1 and 8, the auxiliary brake mechanism 48 is disposed immediately behind the transmission case 26, so that the transmission case 26 is located in front of the auxiliary brake mechanism 48. Thus, the auxiliary brake mechanism 48 does not collide with the ridge when the ridge is crossed, and the auxiliary brake mechanism 48 can be prevented from being damaged.

Further, as shown in FIGS. 1, 8, and 10, the auxiliary brake mechanism 48 is disposed at a position higher than the lowermost end of the transmission case 26. Sometimes, the ridge does not directly collide with the auxiliary brake mechanism 48, and the damage of the auxiliary brake mechanism 48 can be prevented.

Further, as shown in FIGS. 1, 8, and 10, the auxiliary brake mechanism 48 is disposed immediately above the steering yoke 91, so that the lower side of the auxiliary brake mechanism 48 is To prevent the mud and soil from adhering to the auxiliary brake mechanism 48, whereby the braking force of the auxiliary brake mechanism can be well maintained.

In this embodiment, as shown in FIG.
Since the mud removing mechanism 64 is located immediately behind the mission case 26, the front side of the mud removing mechanism 64 is also covered by the mission case 26, preventing the mud and soil from adhering to the mud removing mechanism 64. can do.

Further, the scraper 67 of the mud removing mechanism 64
It is possible to prevent pebbles other than mud or soil from being caught between the brake pulley 49 and the brake pulley 49 of the auxiliary brake mechanism 48, so that the scraper 67 and the brake pulley 49 can be prevented from being damaged.

Further, since the mud removing mechanism 64 is provided above the lowermost end of the transmission case 26, the ridge may directly collide with the mud removing mechanism 64 when an obstacle on a road surface or a ridge is crossed. Therefore, it is possible to prevent the mud removing mechanism 64 from being damaged.

Further, since the steering yoke 91 is disposed immediately below the mud removing mechanism 64, the mud removing mechanism is provided.
The lower side of the 64 is covered with the steering yoke 91, which can also prevent the mud and soil from adhering to the mud removing mechanism 64, thereby preventing the mud removing mechanism 64 from being damaged and supporting the mud removing mechanism 64. The braking force of the brake mechanism 48 can be favorably held.

In particular, as in the present embodiment, the steering yoke 91 is disposed immediately behind the transmission case 26, and the mud removing mechanism 64 is disposed immediately above the steering yoke 91, thereby removing the mud. The front side of the mechanism 64 is covered with the mission case 26, and the lower side of the mud removing mechanism 64 is covered with the steering yoke 91, thereby preventing a road obstacle from colliding with the mud removing mechanism 64 and removing mud. The mechanism 64 can be prevented from being damaged, mud and soil can be prevented from adhering to the mud removing mechanism 64, and the braking force of the auxiliary brake mechanism 48 can be favorably maintained.

In this embodiment, a drive shaft 99 for transmitting the power of the prime mover unit 7 to the traveling unit 6 is disposed substantially in the center of the body in a state of extending in the front-rear direction. Since the auxiliary brake mechanism 48 is disposed on the left side of the shaft 99, the drive shaft 99 does not interfere when the auxiliary brake mechanism 48 is assembled or disassembled, so that the auxiliary brake mechanism 48 can be easily assembled and maintained. Can be improved.

In particular, in this embodiment, since the foot-type brake pedals 168 and 169 are disposed at the right side of the drive shaft, the space under the body can be effectively used, and the body can be made compact. be able to.

Further, the drive shaft 99 does not hinder the assembling and disassembly of the auxiliary brake mechanism 48 and the foot-type brake pedals 168, 169, thereby improving the assemblability and maintainability of the auxiliary brake mechanism 48 and the brake pedals 168, 169. be able to.

FIGS. 14 and 15 show an auxiliary brake mechanism 170 according to another embodiment.
Reference numeral 0 denotes a brake support bracket 171 mounted on the middle part of the sub-pipe 14 of the lower frame structure 17, a substantially L-shaped operation arm 172 is rotatably mounted on the brake support bracket 171, and a distal end of the operation arm 172 is provided. And subpipes 14
A brake belt 173 wound around the brake groove 50 of the brake pulley 49 is attached between the
The rear end of the link ball 57 is attached to the base end of the link ball 57. In the figure, 174 and 175 are tension springs.

When the interlocking operation lever 107 swings rearward, the auxiliary brake mechanism 170 interlocks the link ball 57 and the operating arm 172, causing the brake belt 173 to tighten the brake pulley 49. As a result, the rotation of the drive shaft 99 is stopped, and the machine body is stopped.

[0094]

The present invention is embodied in the form described above and has the following effects.

(1) In the present invention, a drive shaft for transmitting the power of the prime mover unit to the traveling unit is disposed substantially in the center of the body in a state of extending in the front-rear direction. Since the auxiliary brake mechanism is located at one of the side positions, the drive shaft does not become a hindrance when assembling or disassembling the auxiliary brake mechanism, improving the assemblability and maintenance of the auxiliary brake mechanism. Can be.

Furthermore, a space is formed on the opposite side of the auxiliary brake mechanism with respect to the drive shaft, and a foot-type brake pedal can be disposed in the space. And the body can be made more compact.

(2) In the present invention, a drive shaft for transmitting the power of the prime mover unit to the traveling unit is disposed substantially in the center of the fuselage so as to extend in the front-rear direction. While the auxiliary brake mechanism is arranged at one side position, the foot type brake pedal is arranged at the other side position of the drive shaft, so that the space under the fuselage can be used effectively, The body can be made compact.

In addition, the drive shaft does not hinder the assembling and disassembly of the auxiliary brake mechanism and the foot-type brake pedal, so that the assemblability and maintainability of the auxiliary brake mechanism and the brake pedal can be improved.

[Brief description of the drawings]

FIG. 1 is a left side view showing a rice transplanter according to the present invention.

FIG. 2 is a plan view showing an airframe.

FIG. 3 is a left side view showing a clutch-brake interlocking mechanism.

FIG. 4 is a plan view of the same.

FIG. 5 is a rear view showing an auxiliary brake mechanism.

FIG. 6 is the same plane.

FIG. 7 is a sectional view showing a brake support and a boss.

FIG. 8 is a plan view showing a hydraulic cylinder.

FIG. 9 is a rear view of the same.

FIG. 10 is a left side view showing the mission case.

FIG. 11 is a left side view showing the drive shaft.

FIG. 12 is an enlarged view showing an upper end portion of a steering case (when power steering is used).

FIG. 13 is an enlarged view showing an upper end portion of a steering case (when no power steering is used).

FIG. 14 is a rear view showing an auxiliary brake mechanism as another embodiment.

FIG. 15 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 2 Running body 3 Planting machine 4 Elevating mechanism 5 Aircraft frame 6 Traveling part 7 Motor unit 8 Operation operation part 25 Engine 26 Transmission case 27 Two-speed transmission mechanism 48 Auxiliary brake mechanism 49 Brake pulley 50 Brake groove 64 Mud removal Mechanism 67 Scraper 79 Power transmission path 99 Drive shaft 106 Clutch-brake interlock mechanism 107 Interlocking operation lever 108 Clutch pedal 109 Clutch mechanism 161 Hydraulic cylinder 168,169 Brake pedal

Continued on front page F term (reference) 2B062 AA14 AA20 AB01 AB07 BA01 BA05 BA06 BA11 BA13 BA17 BA18 BA24 BA43 3D039 AA02 AA03 AB14 AC05 AC21 AC34 AD06 AD11 3J058 AA48 AA54 AA62 AA68 AA79 AA87 BA67 BA70 CA43 CA49 CC52 CB13 CD18 FA13

Claims (2)

[Claims] An auxiliary brake mechanism (48) for stopping an airframe is provided, and the auxiliary brake mechanism (48) includes a motor unit.
In a rice transplanter configured to operate in conjunction with the clutch mechanism (109) provided in the power transmission path (79) from the (7) to the traveling section (6), the power of the prime mover section (7) is (6) A drive shaft (99) for transmitting power to the vehicle is provided at the approximate center of the fuselage in a state of extending in the front-rear direction.
A rice transplanter characterized in that an auxiliary brake mechanism (48) is disposed at one of the left and right sides of 9). 2. An auxiliary brake mechanism (48) for stopping the vehicle body, wherein the auxiliary brake mechanism (48) is
In a rice transplanter configured to operate in conjunction with the clutch mechanism (109) provided in the power transmission path (79) from the (7) to the traveling section (6), the power of the prime mover section (7) is (6) A drive shaft (99) for transmitting power to the vehicle is provided at the approximate center of the fuselage in a state of extending in the front-rear direction.
9) The auxiliary brake mechanism (48) is arranged at one of the left and right side positions, while the foot type brake pedal (168, 169) is arranged at the other side position of the drive shaft (99). Rice transplanter.