JPH07156697A - Automobile - Google Patents

Abstract

PURPOSE:To facilitate adjusting car height by applying a brake to a wheel, which is not a lift wheel, simultaneously with disconnecting a clutch, transmitted to this wheel, and rotating the lift wheel, so that a wheel supporter in a lift wheel side is turned to variably obtain height of the lift wheel relating to a machine body. CONSTITUTION:In the case of increasing car height from a low height condition, in an agricultural running vehicle body, a transmission is placed in a forward shift to apply a rear wheel brake, simultaneously with disconnecting a side clutch to stop rotating a rear wheel 3. By utilizing force in the case that a front wheel 2 tends to roll on the ground surface in a rotational condition, a final case 8 is turned in a reverse direction to the direction of rotation of the front wheel with a turning center shaft 8a serving as a supporting point, and a front wheel axle 2a is moved from an up-position Pi to a down-position P2. At this time, a rear wheel lift cylinder 18 is driven so as to always hold longitudinal inclination of a machine body horizontal to turn a rear wheel supporting case 16 in the downward direction with a turning center shaft 16a serving as a supporting point, and the rear wheel 3 is lowered down against the machine body, to relatively increase the car height with the machine body left as horizontal held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for adjusting the vehicle height of an automobile such as an agricultural vehicle body.

[0002]

2. Description of the Related Art Rice cultivation requires intermediate management work such as fertilization, herbicide spraying, and pesticide spraying from planting to cutting. There are rice transplanters designed to apply fertilizers and spray herbicides at the same time when planting seedlings, but even this type of rice transplanter cannot be used except for planting work, so intermediate management work is done exclusively by humans. It was carried out in, and it was a big burden for farmers. Therefore, expectations are growing for the development of a managed rice transplanter that can be selectively equipped with a planting work machine or other agricultural work machines on the traveling vehicle body and can be used for intermediate management work in addition to planting work for seedlings. There is.

[0003]

By the way, when carrying out planting work, it is preferable that the vehicle height of the traveling vehicle body is low so that the machine body is stable, but in the case of management work to be carried out when the rice has grown to some extent, The height of the vehicle must be high enough to straddle the rice so that it does not affect the rice. Therefore, as a traveling vehicle body for the controlled rice transplanter, it is necessary to provide a mechanism for adjusting the vehicle height. Since it is inefficient to work because complicated rearrangement must be performed each time the vehicle height is adjusted, it is a problem to be able to adjust the vehicle height by a simple operation.

[0004]

In order to solve the above-mentioned problems, the present invention has the following constitution. That is, in the vehicle according to the present invention, the front and rear wheels are both driven, and the wheel support that supports the front or rear wheels, which are lift wheels, is eccentric from the axle position of the lift wheels, with the center of rotation as the fulcrum. When the lifting wheels are the front wheels, the rear wheels are braked to the rear wheels, and when the lifting wheels are the rear wheels, the front wheels are braked, and at the same time, a wheel rotation stopping means for disconnecting the clutch transmitted to the wheels is provided. The feature is that it is provided.

[0005]

The transmission is put in either the forward or reverse direction, and from that state, the wheel rotation stopping means brakes the wheel other than the lifting wheel and at the same time disengages the clutch transmitted to the wheel. Then, the rotation of the wheel other than the lifting wheel stops. On the other hand, since the lifting wheels are still rotating, the lifting wheels try to roll on the ground, but because the aircraft cannot move due to the frictional resistance between the wheels that are not the lifting wheels and the ground, the wheels that support the lifting wheels. The support body rotates in a direction opposite to the rolling direction of the lifting wheels with the rotation center axis serving as a fulcrum. Since the rotation center shaft is eccentric from the axle position, when the wheel support rotates about this, the height of the lifting wheels with respect to the machine body changes, and the machine body moves up and down. If the same operation as above is performed with the front wheels and the rear wheels being driven in the forward and backward directions, the lifting and lowering of the machine body will be reversed.

[0006]

EXAMPLES As an example of an automobile according to the present invention,
The traveling vehicle body of the managed rice transplanter will be described.

The traveling vehicle body 1 is a four-wheel drive vehicle and is provided with a pair of left and right front wheels 2, 2 and rear wheels 3, 3 which are drive wheels. Front axle cases 6 and 6 are extended to the left and right from the left and right side surfaces of a mission case 5 arranged in the front part of the machine body, and vertical axis cases 7 and 7 are fixedly provided at the tip end thereof, and further lower ends thereof are provided. Final cases 8 and 8 which are wheel supports are rotatably provided around the rotation center shafts 8a and 8a, and are attached to front wheel axles 2a and 2a protruding outward from the outer side of the final cases 8 and 8. Front wheels 2 and 2 are attached. The front wheel axle 2a is eccentric from the rotation center shaft 8a, and when the angle of the final case 8 around the rotation center shaft 8a changes, the height of the front wheels 2 with respect to the machine body also changes so that the machine body moves up and down. Vertical axis case 7
Is composed of an upper case 7U on the front axle case side and a lower case 7L on the final case side, and the lower case 7L can be turned with respect to the upper case 7U.

The rotation range of the final case 8 is defined by a pair of stoppers S1 and S fixed to the outer surface of the final case 8.
2 and the stopper case 9 fixed to the lower case 7L. The final case 8 is rotatable within a range θ that is substantially the front half of the circumference, and when the final case is rotated to the axle raising position P1, as shown in FIG.
The stopper S1 engages with the engaging portion 9a of the stopper receiver 9,
When the final case is rotated to the axle down position P2,
As shown in FIG. 5B, the stopper S2 is replaced by the stopper receiver 9
It engages with the engaging portion 9b.

The axle-up position P1 is set slightly before the top dead center Z1 of the circumference when the final case 8 is rotated upward, and the axle-down position P2 is below the final case 8. It is set at a position slightly beyond the bottom dead center Z2 of the circumference when rotated to the side. This is because when the front wheels 2 and 2 are raised and lowered, the axle is in the axle raising position P1.
This is for stabilizing at the axle down position P2. That is, no matter which position P1 or P2 the axle is on, a force contrary to the weight of the machine body is required to rotate the final case 8 to the rotatable side, so that the state is stable.

Further, front ends of a pair of left and right main frames 10, 10 are fixed to the rear surface of the mission case 5, and a horizontal frame 11 is fixed to rear ends of the main frames 10, 10. And the horizontal frame 11
A rear wheel rolling shaft 12 whose axis is oriented in the front-rear horizontal direction is fitted in the left and right central portions of the rear wheel in a fixed state, and a rear wheel frame 13 is rotatably supported by a protruding portion of the rear wheel rolling shaft. Rear wheel input cases 15 and 15 are integrally provided on the left and right ends of the rear wheel frame 13, and the rear wheel support cases 16 and 16 are rotatably rotatable about the rotation center shafts 16a and 16a with respect to the rear wheel input cases. 16 is provided, and the rear wheels 3, 3 are attached to the rear wheel axles 3a, 3a which project outward from the outer side thereof. The rear wheel axle 3a is eccentric from the rotation center shaft 16a, and the rear wheel support case 1 around the rotation center shaft 16a is provided.
When the angle of 6 changes, the height of the rear wheel 3 with respect to the airframe also changes.

The angles of the rear wheel support cases 16 and 16 are adjusted by the rear wheel lift cylinders 18 and 18. The rear wheel lifting cylinder 18 is a double-acting hydraulic cylinder, the base side of which is pivotally attached to the main frame 10, and the piston side of which is a cylindrical body 19 which is rotatably fitted to the outer peripheral portion of the rear wheel frame 13. It is connected to the tip of the rocking arm 20 which is fixed. In addition to the swing arm 20, the interlocking arm 2 is attached to the tubular body 19.
2 is fixed, and the front end of the interlocking arm 22 is rotatably connected to a connecting shaft 23 projecting from the inner surface of the rear wheel support case 16. When the rear wheel raising / lowering cylinder 18 is contracted, the rear wheel support case 16 is squeezed downward,
The rear wheel 3 becomes lower than the aircraft (shown by the solid line in FIG. 7). Further, when the rear wheel lift cylinder 18 extends, the rear wheel support case 16 becomes sideways, and the rear wheel 3 is attached to the body.
Becomes higher (indicated by a chain line in FIG. 7). The rotation range of the rear wheel support case 16 is the range of α in FIG. 7. The left and right rear wheel lifting cylinders 18, 18 are controlled by a common rear wheel lifting valve 19 (see FIG. 11), so that the left and right rear wheels 3, 3 are simultaneously lifted by the same amount.

When the rear wheels are lowered, the rear wheels 3 and 3 are located rearward compared to when the rear wheels are raised, so that the rear wheels 3 and 3 are in the lowered position and the planting work machine described later. When 80 is in the lowered position, the rear wheels 3 and 3 interfere with the planting work machine. Therefore, when the planting work machine is below a certain height, the angle switch 24 is linked to the operation of the upper link 60 described later.
Is turned on, and the angle of the rear wheel support cases 16, 16 detected by the angle potentiometer 25 becomes a predetermined angle β.
Rear wheel lift cylinders 18, 1 so that (β <α) or less
8 is automatically operated to prevent interference between the rear wheels 3 and 3 and the planting work machine.

The engine 30 includes mainframes 10 and 10.
Is provided above. The rotational power of the engine 30 is transmitted to the HST 32 via the first belt transmission device 31 and is transmitted to the generator 34 via the second belt transmission device 33. Further, the rotational power after shifting by the HST 32 is transmitted to the mission case 5 via the third belt transmission device 36 having a continuously variable transmission mechanism, and the hydraulic pump 3 via the fourth belt transmission device 37.
Passed to 8,39.

The transmission side pulley 36a of the third belt transmission 36 and the transmission portion of the transmission input shaft 5a are configured as a main clutch A. The rotary power input to the transmission case 5 via the main clutch A is shifted by the main transmission B and then divided into traveling power and working machine power.

The driving power is passed through the front differential device C to the left and right front axles 6a, 6a and the vertical axes 7a, 7.
a, the rotation center shafts 8a, 8a, the front wheel axles 2a, 2a, are transmitted in this order, and the left and right rear differential shafts 5b, 5b, the rear wheel output shafts 5c, 5c, and the rear wheel transmission shaft 40 are transmitted via the rear differential device D. , 40, rear wheel input shafts 15a, 15a, rotation center shafts 16a, 16a, and rear wheel axles 3a, 3a. The differential devices C and D have differential lock mechanisms Ca and Da that stop the differential function.

From the rear differential shafts 5b, 5b to the rear wheel output shaft 5
Side clutches and brakes E, E, which are wheel rotation stopping means for the rear wheels shown in FIG. 10, are provided in the transmission section to c, 5c. In the figure, g1 is a bevel gear attached to the rear differential shaft 5b, and g2 is a bevel gear rotatably fitted to the rear wheel output shaft 5c. The side clutch 41 is a multi-plate clutch, and includes a drive plate 41b of the outer cylinder 41a, which is spline-fitted to the bevel gear g2, and a passive plate 41d of the inner cylinder 41c, which is integrally provided on the rear wheel output shaft 5c. Are opposed to each other, and by pressing the slider 41f against the outer cylindrical body 41a by the ring-shaped leaf springs 41e, ..., The drive plates 41b, ... And the passive plates 41d ,. Operate the shifter 41g to move the slider 4
When the pressing of the outer cylinder 41a by 1f is released, the drive plates 41b, ... And the passive plates 41d ,.

The brake 42 presses the shoes 42b, ... On the drums 42a, ... Attached to the rear wheel output shaft 5c to brake the rotation of the rear wheel output shaft 5c. When operating the shifter 41g to the clutch disengagement side,
The slider 41f presses the disc 42c to press the shoe 42
.. presses the drums 42a, .., so that the rear wheels 3 are braked in conjunction with the side clutch disengagement operation.

The rear wheel transmission shaft 40 has a rear wheel output shaft 5c and a rear wheel input shaft 1 via universal joints 43, 43.
Since the rear wheel transmission shaft 40 is connected to the vehicle 5a and the rear wheel transmission shaft 40 is configured to be expandable and contractible, the rolling of the rear wheels 3 and 3 will not affect the positional relationship and distance between the rear wheel output shaft 5c and the rear wheel input shaft 15a. It is ready to respond.

The power for the working machine is transmitted to the planted clutch case 46 via the working machine transmission shaft 45 after being shifted by the stock transmission F and separated into the PTO shaft 47 and the fertilizer drive shaft 48. Taken out. The planting clutch case 46 contains a planting clutch G for turning on / off the drive of the work machine and stopping the work machine at a predetermined phase when the drive is cut off.

The control seat 50 is installed on an engine cover 51 that covers the upper side of the engine 30. A steering handle 52, various levers 53, ... Are provided in front of it. The steering device is a power steering system, and the torque applied to the steering wheel 52 is amplified by the torque generator 54 (see FIG. 11). The lower part of the steering wheel 52 and the like is covered with a front cover 55. Further, on the lower rear portion of the front cover 55, left and right rear wheel brake pedals 56, 56 for operating the shifters 41g, 41g are provided.

Around the lower portions of the engine cover 51 and the front cover 55, there is a horizontal floor step 57 on which the operator can walk or the like. A rear step 58 is provided on the rear side of the control seat 50.

At the rear portion of the machine body, an upper link 60 and lower links 61, 6 for mounting the working machine in a vertically movable manner.
1 is provided. These links 60, 61, 61
Has its base side rotatably attached to a link base frame 62 erected at the rear ends of the main frames 10 and 10, and has a connecting frame of a planting work machine, a work machine mounting hitch, etc. at its tip side. It is designed to be connected. A working machine lifting cylinder 65 is interposed between a support member (not shown) fixed to the main frames 10 and a tip of a swing arm 63 integrally formed with the upper link 60, and the working machine lifting cylinder 65 is expanded and contracted. As a result, the upper link 60 rotates up and down, and the working machine moves up and down with a fixed posture. This working machine lifting cylinder 65 is a working machine lifting valve 6
6 (see FIG. 11).

The hydraulic circuit is assembled as shown in FIG.
That is, two hydraulic pumps 38 and 39 are provided, one hydraulic pump 38 sends oil to the rear wheel lifting cylinders 18 and 18 and the working machine lifting cylinder 63, and the other hydraulic pump 3
9 sends oil to the torque generator 54. Further, oil is supplied to the rear wheel lifting valve 19 only when the working machine lifting valve 66 is neutral.

The traveling vehicle body 1 is constructed as described above, and the vehicle height is adjusted by raising and lowering the wheels 2, 2, 3, 3 according to the work purpose. The vehicle height is adjusted as follows.

To increase the vehicle height from a state where the vehicle height is low (shown in FIG. 1), the mission is advanced and the rear wheel brake pedals 56, 56 are depressed. Then, the rear wheel brakes 42, 42 are applied and at the same time the side clutches 41, 41
And the rear wheels 3 and 3 stop rotating. On the other hand, the front wheels 2,
Since 2 remains rotating, the front wheels 2, 2 try to roll on the ground. By the way, most of the weight of the aircraft is the rear wheels 3,3.
Since the frictional resistance between the rear wheels 3 and 3 and the ground is greater than the propulsion force of the front wheels 2 and 2, the aircraft cannot move. As a result, the final cases 8 and 8 rotate in the opposite direction to the rotation direction of the front wheels with the rotation center shafts 8a and 8a as fulcrums, and the front wheel axles 2a and 2a move from the raised position P1 to the lowered position P2.

On the other hand, the rear wheel elevating cylinders 18, 18 are controlled so that the longitudinal inclination of the machine body is always kept horizontal, and the rear wheel support cases 16, 16 are also rotated according to the rotation of the final cases 8, 8. The rear wheels 3 and 3 descend with respect to the machine body by rotating downward with the rotation center shafts 16a and 16a as fulcrums. As a result, the vehicle height is increased while keeping the body horizontal.

If the front differential device C is locked when the final case is rotated, the left and right final cases 8 are uniformly rotated, so that the vehicle height can be adjusted stably. Further, since the rear wheels 3, 3 are supported by the rear wheel rolling shaft 12 so as to be freely rollable, the load is always evenly applied to the left and right rear wheels 3, 3 and the left and right rear wheels 3, 3 are simultaneously distributed by the same amount. Go down against the aircraft. Therefore, the body does not tilt left and right when adjusting the vehicle height.

When the vehicle height is to be lowered from a high vehicle height, the mission is advanced and the rear wheel brake pedal 5
Step on 6,56. Then, Final Case 8, 8
Rotates in the direction opposite to that when the vehicle height is raised, and the front wheels 2 and 2 ascend with respect to the vehicle body, and at the same time, the rear wheel support cases 16 and 1
6 also turns upward, and raises the rear wheels 3, 3 with respect to the machine body.

When used as a rice transplanter, as shown in FIG. 12, the vehicle height of the traveling vehicle body 1 is lowered and the planting work machine 80 is mounted on the rear portion of the traveling vehicle body. As for the mounting method, a hitch 70 is attached to the rear ends of the upper link 60 and the lower links 61, 61, and the connecting frame 8 of the planting work machine is attached to the hitch.
2 are connected by pins. As a result, the planting work machine 80 is supported in a rolling manner.

The planting work machine 80 comprises a transmission case 84 which also serves as a frame, a seedling mount 85 for placing seedlings, a planting device 86 for planting seedlings on the seedling mount in a field scene ,. ing.

The seedling mounting table 85 is provided so as to be inclined so that the front side is in a higher position, and is slidable right and left. Seedling stand 8
5 is divided into seedling mounting portions corresponding to the number of planting lines, and seedling feeding belts 85a, ... For feeding the seedlings downward are provided for each seedling mounting portion. Further, adjacent to the lower end portion of the seedling placing table 85, a seedling receiving plate 85b having a seedling taking port formed corresponding to the planting devices 86, ... Is fixedly provided. The lateral feeding mechanism in the transmission case 84 reciprocates the seedling mounting table 85 left and right, and the seedlings located at the lowest stage on the seedling mounting table are sequentially supplied to the seedling intake. When all the seedlings for one horizontal row are supplied to the seedling intake, the seedling feeding belts 85a, ... Send the seedlings on the table downward.

The planting device 86 comprises a rotating case 86a which rotates about the horizontal axis, and a pair of implanting rods 86b, 86b attached to the rotating case. When the rotating case 86a rotates, the implantable rods 86b and 86b move to the rotating case 86a.
The tip of the fork-shaped seedling separation claw fixed to the planting rod operates so as to draw a closed and elliptical closed trajectory up and down. As a result, the seedling separation claw separates and holds the seedling supplied to the seedling intake of the seedling mounting table 85, and this is planted in a field scene.

A center float 87 and a pair of left and right side floats 88, 88 are provided below the planting work machine 80. When the aircraft is advanced with each float grounded, the float slides while leveling the mud. The center float 87 is also a sensor for detecting irregularities in a field scene, and during the planting work, the working machine lifting valve 66 is driven according to the vertical movement of the center float 87.
That is, when the center float 87 moves upward, the work implement lift valve 66 is extended in the direction in which the work implement lift cylinder 63 is extended.
When the planting work machine 4 is moved up and the center float 87 is moved downward, the work machine raising / lowering valve 66 is actuated in a direction to contract the work machine raising / lowering cylinder 63, and the planting work machine 4 is moved.
Is going down.

At the time of planting work, the height of the traveling vehicle body 1 is lowered, and the planting work machine 80 is set to the lower position, and each float 8 is moved.
The traveling vehicle body 1 is advanced in a state where 7, 88, 88 receive a part of the weight of the planting work machine. When the machine body is turned at the end of the field, the planting work machine 80 is raised and the planting work is stopped. At that time, since it is easier to turn when the vehicle body is in the forward tilted posture than when it is horizontal, the rear wheels 3 and 3 may be lowered with respect to the vehicle body and the rear part of the traveling vehicle body 1 may be lifted. In this case, both the torque generator 55 and the rear wheel lift cylinders 18 and 18 are operated at the same time, but the oil is sent to them by separate hydraulic pumps 38 and 39, respectively, so the operation is reliable.

When performing fertilizing work at the same time as planting work,
A granular material supply device 90 is provided on the rear side of the control seat 50. The granular material supply device 90 feeds granular material such as fertilizer stored in a hopper 91 downward by a feeding device 92, ...
It is configured to lead to a predetermined position (for example, a fertilization position near the side of the planting strip) through 3, ... Conduit 93, ...
The air blown out from the blower 94 is sent into the inside via the air chamber 95, and the particulate matter in the conduits 93, ... Is conveyed by the action of the wind.

Each section of the hopper 91 is integrally formed, and at the bottom thereof, supply ports 91a, ... For supplying the granular material to the respective feeding devices 92 ,. A lid 91b, which is common to all the shapes, is attached to the upper portion so as to be freely opened and closed.

The feeding device 92 has a main body portion 92a having a feeding roll 96 built therein and a funnel portion 92b continuing to the lower side of the main body portion.
And a connecting pipe 92c integrally formed at the lower end of the funnel portion. The front end of the connecting pipe 92c is inserted into the side surface of the air chamber 95, and the conduit 93 is connected to the rear end.

The pay-out roll 96 is a rotary member having a concave portion 96a for holding particulate matter formed on its outer peripheral portion, and is attached to a mounting shaft 97 in the front-rear direction. The feeding roll 96 is a groove roll 96-1 in which a plurality of grooves are formed along the axial direction.
And a claw roll 96-2 formed with a claw-shaped projection slidably engaged with the groove of the groove roll,
By shifting the relative positions of the two 96-1 and 96-2 in the axial direction, the volume of the recesses 96a, ... Can be changed.

The rotation of the fertilizing drive shaft 48 causes the arm 99,
It is transmitted to the feeding roll drive shaft 102 by the rod 100 and the arm 101, and further transmitted from the feeding roll drive shaft 102 to the respective mounting shafts 97, ... By bevel gears 103 and 104. Roll drive shaft 102 fed from arm 101
Since it is adapted to be transmitted through the ratchet mechanism 106, the feeding roll 96 intermittently rotates in a fixed direction by a predetermined angle. By the rotation of the feeding roll 96, the granular material in the hopper 91 is held by the recessed portions 96a, ... by a predetermined amount and rotationally moved from top to bottom, and is held when the openings of the recessed portions 96a ,. The granular material that had been dropped is dropped downward.

The hopper 9 is provided between the wall surface on the side where the concave portions 96a, ...
While preventing the granular material in 1 from free fall,
Brush 110 for leveling the surface of the granular material held by a
Is detachably attached. The wall surface on the opposite side is in contact with the feeding roll 96, and the granular material in the hopper 91 does not drop downward from here.

A discharge door 112 is provided on the wall surface of the main body case located outside the brush 110. This discharge door 112 is provided so as to be openable and closable outside with a shaft 113 as a fulcrum. When this is opened, a shutter 112a integral with the door 112 contacts the outer peripheral surface of the pay-out roll 96, and the granular material in the pay-out roll 96 is formed. The object passage is blocked (indicated by a chain line in FIG. 14). When the brush 110 is removed in this state, the particulate matter in the hopper 91 is transmitted to the outside through the discharge door 112.

The air chamber 95 is provided horizontally on the left and right, and the connecting pipe 9 is provided in holes 95a, ...
The front end portions of 2c, ... Are inserted. Air chamber 95
The left end portion of the blower is a blowout port 95b, to which the blowout port 94a of the blower 94 is connected. Blower 94 suction port 9
An air guide tube 115 that guides air from the rear portion of the engine 30 is connected to 4b. A shutter 116 that can be opened and closed is attached to the right end of the air chamber 95. When the blower 94 is operated, the warm air at the rear of the engine 30 is sent into the connecting pipes 92c, ... Through the air chamber 95 and conveys the particulate matter rearward through the conduits connected to the connecting pipes. The inside of the conduit is kept dry to prevent solidification of particulate matter such as particulate matter. The air chamber 95 is supported by the link base frame 62 and also serves as the frame of the granular material supply device 90.

When used as a fertilizer applicator or a chemical sprayer for intermediate management work, as shown in FIG. 15, the vehicle height of the traveling vehicle body 1 is increased and the hitch 70 attached to the upper link 60 and the lower links 61, 61 is used. Install the spreader 120. As the device for supplying the granular material to the sprayer 120, the granular material supply device 90 is used.

The spreader 120 has spray ports 12 at both left and right ends.
A plurality of spray tubes 12 having different lengths
, ... are provided in a bundled state in the left-right direction. Then, the rear ends of the conduits 93 are connected to the right middle part and the left middle part of each spray pipe 123 so as to communicate with each other so that the particulate matter supplied from the particulate matter supply device 90 is discharged from the spraying port 122. Has become. The spreader 120 is also provided with a blower 124, and the blower 124 blows air into the central portion of each of the spray pipes 123, ...
The granular material supplied inside is forcibly conveyed in the direction of the spray ports 122 ,. Since the guide portion 122a for preventing the scattering of the particulate matter is formed around the spraying port 122, the spraying port 1 can be used regardless of the type, size, specific gravity and the like of the granular material.
The particulate matter is always discharged from 22 in a fixed direction, and the particulate matter is sprayed at an appropriate position in the field. Each of the spray pipes 123, ... Has a large diameter pipe 123a on the base side and small diameter pipes 123b, 12 on the tip side.
It has a structure in which 3b are connected, and a large diameter pipe 123
By changing the amount of insertion of the small diameter tubes 123b, 123b into a, the distance between the spray ports 122, ... Can be adjusted. Further, when not in use, the small diameter pipes 123b and 123b can be inserted into the large diameter pipe 123a to make it compact.

Since the hopper 91 of the granular material supply device 90 is made for fertilizer, when spraying a chemical such as a herbicide whose amount of spray is smaller than that of fertilizer, the total amount of the drug used is supplied to the hopper 91. In many cases, even if the hopper 91 is put in, the bottom of the hopper 91 can only be hidden. If the work is performed in a state where the amount of such particulate matter is small, the distribution of the particulate matter in the hopper 91 is varied due to the inclination and vibration of the machine body, and the feeding amount of each line is likely to be uneven. Therefore, when the amount of spraying is small, a small amount spraying hopper 91 'having a narrower width in the front and back is fitted into the hopper 91, and the granular material is thrown into the small amount spraying hopper 91'. Even if the remaining amount of the product becomes small, the granular material can be evenly supplied to each of the feeding devices 92, ..., The feeding amount of each line becomes accurate.

[0046]

As described above, the vehicle according to the present invention can adjust the vehicle height by a simple operation without reassembling complicated parts.

[Brief description of drawings]

FIG. 1 is a side view showing a state where a vehicle height of an agricultural traveling vehicle body is lowered.

FIG. 2 is a side view showing a state in which the vehicle height of the agricultural traveling vehicle body is increased.

FIG. 3 is a plan view in which a part of an agricultural traveling vehicle body is omitted.

FIG. 4 is a front sectional view of a front wheel support portion.

5A and 5B are side views of a front wheel support portion, where FIG. 5A shows a state where the front wheel axle is in a wheel raising position, and FIG. 5B shows a state where the front wheel axle is in a wheel lowering position.

FIG. 6 is a rear sectional view of a rear wheel support portion.

FIG. 7 is a side view of a rear wheel support portion.

FIG. 8 is a side view of a main part of the agricultural traveling vehicle body.

FIG. 9 is a transmission system diagram.

FIG. 10 is a diagram showing a half of a side clutch / brake as an outer shape and a remaining half as a cross section.

FIG. 11 is a hydraulic circuit diagram.

FIG. 12 is a side view showing a state of being used as a fertilizer transplanter.

FIG. 13 is a side sectional view of the granular material supply device.

FIG. 14 is a rear cross-sectional view of the granular material supply device.

FIG. 15 is a side view showing a state of being used as a medicine spraying machine.

FIG. 16 is a plan view of the spreader.

[Explanation of symbols]

 E Side clutch / brake (wheel rotation stopping means) 1 Agricultural traveling vehicle body (automobile) 2 Front wheel 2a Front wheel axle 3 Rear wheel 8 Final case (wheel support) 8a Rotation center axis

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[Procedure amendment]

[Submission date] June 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

When the vehicle height is to be increased from the low vehicle height (shown in FIG. 1), the transmission is put in reverse and the rear wheel brake pedals 56, 56 are depressed. Then, the rear wheel brakes 42, 42 are applied and at the same time the side clutches 41, 41
And the rear wheels 3 and 3 stop rotating. On the other hand, the front wheels 2,
Since 2 remains rotating, the front wheels 2, 2 try to roll on the ground . Since the frictional resistance between the rear wheels 3 and 3 and the ground is larger than the propulsive force from the front wheels 2 and 2, the aircraft cannot move. As a result, Final Case 8,8
Rotates about the rotation center shafts 8a, 8a in the opposite direction to the rotational drive direction of the front wheels, and the front wheel axles 2a, 2a move to the raised position P.
Move from 1 to the lowered position P2.

Continuation of the front page (72) Inventor Katsu Nomura, 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A front wheel and a rear wheel are driven together, and a wheel supporting body for supporting a front wheel or a rear wheel, which is an ascending / descending wheel, is rotatable about a rotation center axis eccentric from an axle position of the ascending / descending wheel. In addition, the wheel rotation stopping means for disengaging the clutch transmitted to the rear wheel when the lifting wheel is the front wheel and the front wheel when the lifting wheel is the rear wheel is provided. Characteristic car.