JP2001138926A - Agricultural chemical sprinkling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the running operability of an agricultural chemical sprinkling vehicle. SOLUTION: In the agricultural sprinkling vehicle in which a steering wheel spindle is passed through a steering column 10, a steering-input device forming a part of a power steering mechanism is coupled-connected to the lower end part of the steering wheel spindle, while a steering wheel 11 is installed on the upper end part of the steering wheel spindle, and the operation of the power steering mechanism is interlocked with a turning operation of the steering wheel through the steering-input device, the base end part of the steering column is installed to a steering column supporting member so that it can be freely tilted around the axis in the lateral direction, a tilt-adjusting body is provided between the steering column and the steering column supporting member, and thus the tilt adjustment of the steering column by the tilt-adjusting body becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an agricultural chemical sprayer.

[0002]

2. Description of the Related Art Conventionally, as a form of agricultural sprayer,
On the body frame equipped with rear wheels, an operating unit is provided at the forefront position, and the operating unit is used for operating steering wheels, seats, etc. on the floor stretched in front of the body frame. There is a configuration in which a member is provided, and a driving operation member is covered with a cabin formed in a box shape with an open bottom surface.

[0003] A part of the driving operation member is inserted through a steering wheel support shaft into a steering column.
A steering input device that forms a part of the power steering mechanism is interlocked to the lower end of the steering wheel spindle, and a steering wheel is attached to the upper end of the steering wheel spindle to rotate the steering wheel. The operation of the power steering mechanism is linked via the steering input device.

In addition, a differential device is provided between a pair of left and right rear wheels, and the differential device is differential-locked by a differential lock operating tool provided in an operation unit to forcibly rotate the right and left wheels at the same speed. I can do it.

[0005] Here, the differential lock operation tool is disposed immediately below a seat provided in the driving section.

[0006]

However, the agricultural chemical sprayer described above still has the following problems.
Since the steering column is fixed, the height of the steering wheel attached to the steering column via the steering wheel support shaft may not match the operator's physique, making it difficult for the operator to operate. When the operator gets on and off, the steering wheel may interfere. Since the entire cabin cannot be opened, maintenance inside the cabin is difficult to perform. It is difficult to clean the cabin ceiling. When the seat is adjusted forward, the diff lock operating device may be hidden under the seat,
In this case, it is difficult to operate the differential lock operating tool.

[0007]

Therefore, according to the present invention, a steering input device, which forms a part of a power steering mechanism at the lower end of the steering wheel support shaft, is inserted into a steering column. On the other hand, in the pesticide dispersing vehicle, the steering wheel is attached to the upper end of the steering wheel support shaft, and the operation of the power steering mechanism is linked to the turning operation of the steering wheel via the steering input device. The base end of the steering column is attached to the steering column support member so as to be tiltable around the left-right axis, and a tilt adjuster is interposed between the steering column and the steering column support member. That the steering column tilt can be adjusted. It is intended to provide a pesticide-dispersed vehicle.

[0008] The present invention also has the following features.

A steering input device operatively connected to the steering wheel support shaft is integrally mounted on a steering column through which the steering wheel support shaft is inserted, and the steering input device is also connected to the steering column and the steering wheel support shaft. The tilt adjustment was made integrally.

[0010] An operating section is provided at the foremost position on a body frame having front and rear wheels, and the operating section includes a steering wheel and a seat on a floor stretched at the front of the body frame. Etc., which are covered by a box-shaped cabin with an open bottom surface. The cabin has a front end pivotally supported by the front end of the floor, The operation member can be opened and closed between a closed position where the operation member is covered and an open position where the operation member is opened by pivoting forward around the pivot.

A differential device is provided in at least one of between the pair of left and right front wheels and between the pair of right and left rear wheels, and the differential device is subjected to a differential lock operation by a differential lock operating tool provided in an operation unit, and the left and right sides are operated. In the agricultural chemical sprayer, the wheels can be forcibly rotated at the same speed, the seats are arranged in the driving section so that the front and rear positions can be adjusted, and the differential lock operating device is arranged immediately below the seats. The diff lock operating device can be adjusted in the front and rear position integrally with the seat.

[0012]

Embodiments of the present invention will be described below.

That is, the agricultural chemical sprayer according to the present invention comprises:
As a basic structure, a steering wheel spindle is inserted into a steering column, and a steering input device forming a part of a power steering mechanism is interlockedly connected to a lower end of the steering wheel spindle. Attach the steering wheel to the upper end,
The operation of the power steering mechanism is linked to the turning operation of the steering wheel via the steering input device.

As a characteristic structure, the base end of the steering column is attached to the steering column support member so as to be tiltable around a left-right axis, and a tilt adjuster is provided between the steering column and the steering column support member. The tilt adjustment body enables tilt adjustment of the steering column.

Since the steering column is tilt-adjustable by the tilt adjusting body in this manner, the operator adjusts the tilt of the steering column according to his or her physique, thereby adjusting the height of the steering wheel. The steering wheel can be operated in a comfortable position. As a result, traveling operability can be improved.

Also, when the operator gets on and off the vehicle, the steering column can be tilt-adjusted by the tilt adjusting body as necessary, so that the steering wheel does not hinder the getting on and off, and the operator can get on and off the vehicle smoothly. be able to.

Also, a steering input device, which is connected to the steering wheel support shaft, is integrally attached to a steering column through which the steering wheel support shaft is inserted, and the steering input device is also mounted on the steering column and the steering wheel support. The tilt is adjusted integrally with the shaft.

Since the steering input device and the steering wheel support shaft are integrally supported on the steering column in this manner, the two can be easily and reliably interlocked even if the steering column itself tilts. The power steering function can be secured well.

Further, on the body frame having the front and rear wheels, the driving unit is disposed at the foremost position.
The driving section is provided with driving operation members such as steering wheels and seats on the floor stretched in front of the body frame,
The driving member is covered by a cabin formed in a box shape with an open bottom, and the cabin is pivotally supported at the front end to the front end of the floor to cover the driving member with a closed position; The driving operation member can be opened and closed between an open position in which the driving operation member is opened by pivoting forward about the pivot portion.

In this manner, the operation member can be opened by rotating the entire cabin forward about the pivot, so that maintenance of the operation member in the cabin can be easily performed. be able to.

In addition, the ceiling surface of the cabin can be easily cleaned.

Further, a differential device is provided in at least one of between the pair of left and right front wheels and between the pair of right and left rear wheels, and the differential device is subjected to a differential lock operation by a differential lock operating tool provided in an operation unit. In the agricultural chemical sprayer that can rotate the left and right wheels at the same speed, the seats are arranged in the driving section so that the front and rear positions can be adjusted, and the differential lock operating tool is located just below the seats. ,
The differential lock operating tool can adjust the front and rear position integrally with the seat.

As described above, since the differential lock operating tool can be adjusted in the front-rear position integrally with the seat, when the seat is adjusted forward, the differential lock operating tool also moves forward to move relative to the seat. Since the positional relationship does not change in a constant state, the operability of the differential lock operating tool can be ensured satisfactorily.

[0024]

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

A shown in FIG. 1 is an agricultural chemical sprayer according to the present invention. The agricultural chemical sprayer A has a body frame having a pair of left and right front wheels 6,6 and a pair of left and right rear wheels 7,7. 1, the operation unit 2 is arranged at the forefront position, while the chemical solution spraying unit 5 is arranged at the last position, and the chemical solution tank 3 and the motor unit are disposed between the operation unit 2 and the medicine spraying unit 5. 4 are arranged.

The motor unit 4 includes an engine E and a chemical spray pump 8.

In this way, the pesticide sprayer A sends the chemical stored in the chemical tank 3 to the chemical sprayer 5 by the chemical spray pump 8 while running the vehicle body. A chemical solution is sprayed around from No. 5.

At this time, the operating unit 2 is disposed at the forefront on the vehicle body frame 1, while the chemical spraying unit 5 is disposed at the rearmost position on the vehicle body frame 1, so that the chemical spraying unit 5 is sprayed from the chemical spraying unit 5. The chemical solution that adheres to the driving unit 2 is reduced,
Operational hindrance due to the attached chemical liquid can be eliminated.

Moreover, since the relatively heavy chemical liquid tank 3 and the prime mover unit 4 are arranged near the center of the vehicle body frame 1, the stability of the vehicle body can be secured well. Drivability can be improved.

The driving section 2 is provided with a driving operation member 43 on a floor section 42 stretched in front of the body frame 1, and the driving operation member 43 is covered with a cabin 9 formed in a box shape having an open lower surface. It is composed.

In the driving operation member 43, the steering column 10 is erected at the front end of the floor 42, and the steering wheel 11 is attached to the upper end of the steering column 10 via the steering wheel support shaft 12. A seat 13 is arranged at a position immediately behind the steering wheel 11, and the steering wheel 11 includes a steering operation mechanism described later.
14 are linked. 44 is a brake pedal.

Here, as shown in FIGS. 2 and 3, a pair of left and right front wheels 6, 6 are connected to a pair of left and right front axle cases 16 by a front differential device 15 disposed at the front of the body frame 1. , 16
While the left and right rear wheels 7,7 are
A rear differential device 17 disposed at the rear of the body frame 1 is interlocked and connected via a pair of left and right rear axle cases 18 and 18,
A transmission case 19 interlockingly connected to the engine E is disposed between the two differential devices 15 and 17, and the transmission case 19 and the differential cases 15 and 17 are connected to the front and rear transmission shafts 2.
0,21 and interlocking connection.

As shown in FIG. 2, the steering operation mechanism 14 is connected to a pair of left and right front wheels 6, 6 with a front steering mechanism 22 for steering the front wheels 6, 6, and A pair of right and left rear wheels 7,7 are linked to a rear steering mechanism 23 for steering the two rear wheels 7,7 in an interlocking manner.
A steering system switching mechanism that switches the steering system between 22,23
The steering system switching mechanism 24 is interlocked and connected to the steering wheel 11 with the intermediary of the steering system switching mechanism 24.

The front steering mechanism 22 includes a front bell crank 25, a pair of left and right front tie rods 26, 26, and a pair of left and right front knuckle arms 27, 27, and 28 is a front bell crank support shaft.

The rear steering mechanism 23 includes a rear bell crank 29, a pair of left and right rear tie rods 30, 30, and a pair of left and right rear knuckle arms 31, 31, and 32 is a rear bell crank support. Axis.

The steering system switching mechanism 24 is formed by extending in an arc shape in the left-right width direction, and swings a swing case 33 having a central portion pivotally supported about the axis in the vertical direction. A swing hydraulic cylinder 34 to be moved, a rack 35 slidably disposed in the swing case 33, a pinion gear 36 meshing with the rack 35, a pinion rotation motor 37 for rotating the pinion gear 36, A front relay rod 38 connecting the right side of the swing case 33 and the front bell crank 25,
A rear relay rod 39 for connecting the center of the rack 35 and the rear bell crank 29 is provided.

The swing hydraulic cylinder 34 is connected to the steering wheel 11 via a steering input device 41 which forms a part of a power steering mechanism 40.
Here, as the steering input device 41, for example, a direction control valve can be used.

Thus, the steering wheel 11
When the rotary operation is performed, the hydraulic cylinder for swinging
34 extend and retract, the swing case 33 swings in the forward and backward directions in conjunction therewith, and the front steering mechanism 22 slides in the left and right direction via the front relay rod 38 to move the front wheels 6, 6
To be able to steer.

At this time, when the rack 35 is disposed at the center in the swing case 33, the rear wheels 7, 7 keep the straight running state, and the front two-wheel steering system of only the front wheels 6, 6 is used. Becomes

The rack 35 is connected to a pinion rotation motor 37.
As a result, the rear wheels 7, 7 are steered to the same phase or opposite phases to the front wheels 6, 6 by sliding in the left-right direction via the pinion gear 36, thereby providing a four-wheel steering system.

In the above-described configuration, the gist of the present invention is that, as shown in FIG.
A closed position (a) that is pivotally supported by a pivot 52 whose axis is oriented in the left-right direction via a cabin side bracket 50 and a floor side bracket 51 at the front end of the
That is, the driving operation member 43 can be opened and closed between an open position (b) in which the operation operation member 43 is opened by rotating the pivot 52 forward.

In this way, the entire cabin 9 is
By driving the robot forward about the
Since the opening 43 can be opened, maintenance of the driving operation member 43 in the cabin 9 and the like can be easily performed.

The ceiling surface 9a of the cabin 9 can be easily cleaned.

Further, a steering wheel support shaft 11 is inserted into the steering column 10 and a steering input device 41 forming a part of a power steering mechanism 40 is interlockedly connected to a lower end of the steering wheel support shaft 11. The steering wheel 12 is attached to the upper end of the steering wheel support shaft 11.
The operation of the power steering mechanism 40 is interlocked with the turning operation of the steering wheel 12 via the steering input device 41.

As shown in FIGS. 5 and 6, the steering column 10 includes a cylindrical valve supporting column forming body 10a for supporting the steering input device 41 in a surrounding state, and a valve supporting column forming body 10a. And a supporting column forming body 10b which is provided in communication with the upper end of the body 10a and which supports the steering wheel support shaft 12 in a surrounding state.

Further, a valve support column forming body 10 is provided in an operation box 53 as a steering column support member.
a and the valve support column forming body 10a
Of the valve support column forming body 10a is freely tilted (vertically oscillated) via a boss 58 on a pivot shaft 54 laterally penetrated in the operation box 53 in the left-right direction. The lower end of the supporting shaft support column forming body 10b is connected and connected to the section, and the supporting shaft supporting column forming body 10b is connected to the operation box 53.
And rises upward through an opening 55 formed in the ceiling 53a. 56 is a bellows-like cover body, and 57 is a hydraulic hose.

In this way, the steering input device 41 is accommodated and
The supporting column forming body 10a for supporting and the supporting column forming body 10b for accommodating and supporting the steering wheel support shaft 12 can be integrally tilted about the pivot shaft 54. .

A tilt adjuster 60 is provided between the upper right side of the valve support column forming body 10a and the upper right side of the operation box 53, and the tilt adjuster 60 adjusts the tilt of the steering column 10. Is possible.

That is, the tilt adjusting member 60 is provided on the upper right side of the valve support column forming member 10a with the tilt operating lever 61.
The tilt control lever 61 is pivotally supported by a lever support shaft 62 whose axis is oriented in the front-rear direction, so that the tilt operation lever 61 can swing up and down. 63 is formed, and the tilt operation lever 61 is inserted into the tilt adjustment guide groove 63, and the tilt operation lever
The operation gripper 61a formed at the tip of the
To the right outside.

The guide groove 63 for tilt adjustment has a lever sliding portion 63a formed on the upper side and the lever sliding portion 63a.
The four engagement recesses 63b are formed at regular intervals on an imaginary arc centered on the pivot shaft 54 serving as a tilt center so as to communicate with the lower edge of the 63a.

Further, a tension spring 64 is provided between the base end of the tilt operation lever 61 and the inner wall of the operation box 53, and the tilt operation lever 61 is engaged with the engagement recess 63b by the tension spring 64. It is elastically biased in the direction in which it is caused.

When the steering column 10 is tilted in this manner, the tilt operation lever 61 engaged with one of the engagement recesses 63b is pushed by the tension spring 64.
The engagement is released by rotating to the lever sliding portion 63a side against the elastic biasing force of the above, the steering column 10 is tilted to a desired angle in the same state, and then the tilt operation lever 61 is moved to the desired position. The engagement recess 63b is engaged.

In this embodiment, a pair of left and right rear wheels 7,
7 and the rear differential 17
Is differential-locked by a differential lock operating tool 70 provided in the driving section 2 so that the left and right rear wheels 7, 7 can be forcibly rotated at the same speed.

As shown in FIGS. 7 and 8, the seat 13 is arranged on the floor 42 of the driving section 2 via a slide position adjuster 71 so that the slide position can be adjusted in the front-rear direction.
A differential lock operating tool 70 is arranged at a position immediately below and the differential lock operating tool 70 is attached to the seat 13 via a lever support 72 so that the front and rear position can be adjusted integrally with the seat 13.

The slide position adjuster 71 includes a fixed machine frame 73 fixed on the floor 42, a movable machine frame 74 slidably mounted on the fixed machine frame 73, and a movable machine frame 74. It comprises a fixing operation section 75 for fixing the 74 to an arbitrary position. 7
3a is a slide rail, 75a is a fixed operation lever, and 75b is a locking piece for fixing the lever.

The lever support 72 includes a mounting piece 72a attached to the right side of the lower surface of the seat 13, and a lever supporting piece 72 formed to extend downward from the front edge of the mounting piece 72a.
b, and a wire support piece 72c protruding downward from the rear edge of the mounting piece 72a.

A shaft supporting boss 76 extending in the left-right direction is attached to the lever supporting piece 72b.
The lever support shaft 77 is inserted into the shaft 76, and the base end of the differential lock operating tool 70 is attached to the right end of the lever support shaft 77,
A proximal end of a wire operating lever 78 is attached to the left side of the lever support shaft 77, and a push-pull wire is inserted between a distal end of the wire operating lever 78 and a differential lock portion (not shown) provided in the rear differential device 17. The differential lock portion can be operated via the push-pull wire 79 by operating the differential lock operating tool 70 with the intervening member 79.

As described above, the differential lock operating tool 70 is
Since the front and rear position can be adjusted integrally with the seat 13, when the seat 13 is adjusted forward, the differential lock operating device 70 also moves forward and the relative positional relationship with the seat 13 does not change. The operability of the differential lock operating tool 70 can be favorably secured.

In this embodiment, the differential lock operating tool 70
Operates the differential lock portion of the rear differential device 17, but the differential lock portion of the front differential device 15 can be operated, or both the differential lock portions can be operated simultaneously. .

[0060]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the steering wheel support shaft is inserted into the steering column, and the steering input device forming a part of the power steering mechanism is interlockingly connected to the lower end of the steering wheel support shaft. A steering wheel attached to an upper end portion of the steering wheel support shaft, and an operation of a power steering mechanism is interlocked with a rotation operation of the steering wheel via the steering input device; The base end of the steering column is attached to the steering column support member so as to be tiltable around an axis in the left-right direction, and a tilt adjustment body is interposed between the steering column and the steering column support member. Tilt adjustment is possible.

As described above, since the tilt adjustment of the steering column is made possible by the tilt adjusting body, the operator adjusts the tilt of the steering column according to his or her physique, thereby adjusting the height of the steering wheel. The steering wheel can be operated in a comfortable position. As a result, traveling operability can be improved.

Also, when the operator gets on and off the vehicle, the steering column can be tilt-adjusted by the tilt adjuster as necessary, so that the steering wheel does not hinder the getting on and off, and the operator can get on and off smoothly. be able to.

According to the second aspect of the present invention, the steering input device, which is connected to the steering wheel support shaft, is integrally attached to the steering column through which the steering wheel support shaft is inserted. Also, the tilt is adjusted integrally with the steering column and the steering wheel support shaft.

In this manner, the steering input device and the steering wheel support shaft are integrally supported on the steering column, so that the two can be easily and reliably interlocked even though the steering column itself tilts. The power steering function can be secured well.

According to the third aspect of the present invention, on the vehicle body frame having the front and rear wheels, an operating unit is disposed at the foremost position, and the operating unit is attached to the front of the vehicle body frame. A driving operation member such as a steering wheel and a seat is provided on the floor, and the driving operation member is covered with a box-shaped cabin having an open bottom surface, and the front end of the cabin has a front end of the floor. The driving operation member can be opened and closed between a closed position in which the driving operation member is covered and an opening position in which the driving operation member is opened by pivoting forward about the pivot portion.

By rotating the entire cabin forward about the pivot portion in this way, the driving operation member can be opened, so that maintenance of the driving operation member and the like in the cabin can be performed easily. be able to.

Then, the ceiling of the cabin can be easily cleaned.

According to a fourth aspect of the present invention, a differential lock device is provided in at least one of a pair of left and right front wheels and a pair of right and left rear wheels, and the differential device is provided in a driving unit. In a pesticide spraying vehicle that is capable of forcibly rotating the left and right wheels at the same speed by a differential lock operation with a tool, the seat is arranged in the driving section so that the front and rear position can be adjusted, and A differential lock operating device is arranged, and the differential lock operating device can be adjusted in the front-rear position integrally with the seat.

As described above, since the differential lock operating tool can be adjusted in the front-rear position integrally with the seat, when the seat is adjusted forward, the differential lock operating tool also moves forward to move relative to the seat. Since the positional relationship does not change in a constant state, the operability of the differential lock operating tool can be ensured satisfactorily.

[Brief description of the drawings]

FIG. 1 is a side view of an agricultural sprayer according to the present invention.

FIG. 2 is an explanatory side view of a steering operation mechanism of the agricultural chemical sprayer.

FIG. 3 is an explanatory plan view of a steering operation mechanism of the agricultural chemical sprayer.

FIG. 4 is an explanatory side view showing an open state of the cabin.

FIG. 5 is a partially cutaway side view of the steering column.

FIG. 6 is a sectional front view of the steering column.

FIG. 7 is a partially cutaway side view of the differential lock operating tool.

FIG. 8 is a plan view of the differential lock operating tool.

[Explanation of symbols]

 A Agricultural sprayer 1 Body frame 2 Operating part 3 Chemical tank 4 Motor unit 5 Chemical sprayer 6 Front wheel 7 Rear wheel 8 Chemical spray pump 9 Cabin

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B62D 33/073 B62D 33/06 G // A01B 69/00 302 (72) Inventor Shinozaki Ozaki Enami, Okayama City, Okayama Prefecture No. 428 F-term (reference) in Seirei Industry Co., Ltd. 2B043 AA03 AB07 AB11 BA02 BB08 DB04 DC03 2B121 CB04 CB33 FA02 3D030 DD06 DD18 DD24 3D036 GB08 GD01 GF02 GH16 GJ12

Claims (4)

[Claims] A steering input device for inserting a steering wheel support shaft (12) into a steering column (10) and forming a part of a power steering mechanism (40) at a lower end portion of the steering wheel support shaft (12). (41) and the steering wheel (11) is attached to the upper end of the steering wheel support shaft (12).
In the agricultural chemical sprayer, the operation of the power steering mechanism (40) is interlocked with the rotation operation of the power steering mechanism (40) via the steering input device (41), the base end of the steering column (10) is used as a steering column support member. It can be freely tilted around the horizontal axis and the steering column (10)
Between the tilt column and the steering column support (6
A pesticide spraying vehicle characterized in that the tilt adjusting body (60) enables the tilt adjustment of the steering column (10) to be interposed therebetween. 2. A steering input device (41) interlockingly connected to a steering wheel support shaft (12) is integrally attached to a steering column (10) through which the steering wheel support shaft (12) is inserted. The tilt input of the steering input device (41) is integrally adjusted with the steering column (10) and the steering wheel support shaft (12).
The pesticide sprayer described. 3. An operation unit (2) is provided at a foremost position on a body frame (1) having front and rear wheels (6, 6, 7, 7), and the operation unit (2 ) Is provided with a driving operation member (43) such as a steering wheel (11) and a seat (13) on a floor (42) stretched in front of the body frame (1), and the driving operation member (43) is provided. 43) is covered by a cabin (9) formed in a box shape with an open bottom, and the cabin (9) has a floor (4
The closed position (a) pivotally supported at the front end of (2) and covering the driving member (43), and the open position where the driving member (43) is opened by pivoting forward around the pivot. 3. The agricultural chemical sprayer according to claim 1, wherein the vehicle can be opened and closed between the position (b). 4. A differential device is provided between at least one of a pair of left and right front wheels (6, 6) and at least one of a pair of right and left rear wheels (7, 7), and the differential device is provided in an operation unit. The front and rear position of the seat (13) is adjusted to the driving section (2) in the agricultural chemical sprayer that can force the left and right wheels to rotate at the same speed by the differential lock operation using the differential lock operating tool (70) The differential lock operating device (70) is located just below the seat (13) and the differential lock operating device (70) can be adjusted forward and backward integrally with the seat (13). The agricultural chemical sprayer according to any one of claims 1 to 3, characterized in that: