JPH0341979Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a walking agricultural vehicle used mainly in wet fields.

[Conventional technology]

To explain a walking rice transplanter as an example of such a walking work vehicle, conventionally, a pair of left and right side clutches are provided for a pair of left and right wheels, and when the machine turns at the edge of a ridge, the side clutches of one wheel are The clutch is configured to be disengaged by a side grip lever provided on the control handle to turn the aircraft.

If you want to move the aircraft a little closer to the width for row alignment during planting, the aircraft will turn sharply if one wheel is stopped, so adjust the direction of the aircraft by swinging the control handle to the left or right. It's becoming like that.

[The problem that the idea attempts to solve]

However, manually turning the machine to the left or right requires an incredibly large amount of force, and especially in deep fields, it requires even more effort, making it difficult for less powerful workers to operate.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to enable sharp turns at the edge of a ridge as before, and to use the side grip levers to change the direction of the aircraft during work travel. Modifications can be made easily, and the complexity of switching operations can also be eliminated.

[Means to solve the problem]

The characteristic configuration of the present invention is that a pair of side clutches are provided for independently intermittent driving of a pair of left and right wheels, a steering mechanism is provided for steering the wheels, and the side clutches are provided on the left and right sides of a steering wheel. A linkage selection mechanism is provided for switching between a state in which the steering mechanism is linked to the side grip lever and a state in which the steering mechanism is linked to the side grip lever, and the linkage selection mechanism is further operated for essential operations when the aircraft turns. The point is that it is linked to the operating tool for work.

[Effect]

When the aircraft is turning at the edge of a ridge, when a work operating tool is operated to carry out an essential operation during the turn, the connection selection mechanism is switched to a state in which the side clutch is connected to the side grip lever. ,
When the side grip lever on the inside side of the aircraft turning is operated, the power to the wheels on the inside side of the aircraft turning is cut off, and the aircraft makes a sharp turn.

Then, when the work operating tool is operated after the aircraft turns, the linkage selection mechanism is activated.
The steering mechanism is switched to a state in which it is linked to the side grip lever, and when the vehicle is traveling straight, by operating the side grip lever, the meandering of the aircraft can be corrected via the steering mechanism.

[Effect of idea]

In this way, a side clutch and a steering mechanism are provided for the wheels, and a link selection mechanism is provided that selectively switches the side clutch and steering mechanism to the side grip lever, so the same side grip lever can be used. It can be used to correct meandering when the aircraft turns and when traveling straight, and it has become easier to correct meandering when traveling straight.

Furthermore, since the switching of the linkage selection mechanism is linked to the work operating tool for performing essential operations when turning the aircraft, the complexity of switching the linkage selection mechanism is eliminated, making it easy to use. .

〔Example〕

FIG. 4 shows a walking rice transplanter, which is an example of a walking agricultural vehicle to which the present invention is applied. This rice transplanter is equipped with an engine 1 at the front of the machine, a transmission case 2 at the rear of the engine 1, and a seedling platform 3 that moves back and forth horizontally at the rear of the machine, a seedling planting device 4, and a rear upper part. The machine body is equipped with a pair of left and right control handles 5, 5 extending from the ground, and is connected to a pair of left and right drive axles 6, 6 pivotally supported at the lower end of the transmission case 2, and a front float 7 that slides across the field.
A and a group of floats consisting of a pair of left and right rear floats 7b, 7b support the machine at an appropriate height in the field, while sequentially planting two rows of seedlings.

Next, the drive structure of the wheels 6, 6 will be explained.

As shown in FIGS. 1 to 3, left and right wheels 6,
a side clutch 8 that independently connects and disconnects the drive of 6;
8 in the mission case 2, and
Output shafts 10, 10 for transmitting power outputted through the side clutches 8, 8 to axles 9, 9 are interlocked with bevel gears via intermediate transmission shafts 11, 11, and the control handles 5, 5 are The side grip levers 12, 12 and the side clutches 8, 8 are linked together, and by gripping and operating one of the side grip levers 12, 12, the side clutches 8, 8 The configuration is such that one of them is turned off and the drive of the wheels 6, 6 is independently intermittent, so that the aircraft can turn with a small turning radius when changing direction at the edge of a ridge. be.

Further, the wheels 6, 6 are configured to be steerable by a steering mechanism A, and the specific configuration thereof will be described below.

Second cases 14, 14 for covering the intermediate transmission shafts 11, 11 are fitted onto the first case 13 for covering the output shafts 10, 10 so as to be rotatable about the vertical axis X, and Knuckle arms 15, 1 are mounted on the upper part of the cases 14, 14 and rotate together with the cases 14, 14.
5 is fixed. The knuckle arms 15, 15 are connected by tie rods 16, 16, and the free end portions of the tie rods 16, 16 are pivoted to a swing arm 17, and the swing arm 17 is connected to a vertical axis at an intermediate portion thereof. The side grip lever 1 is pivoted to the fuselage side so that it can rotate freely around center Y.
2 and 12 to swing the swinging arm 17 to open the second case 1.
4, 14 around the vertical axis X, and the wheels 6, 6 are attached to the side grip levers 12, 1.
It is constructed so that it can be steered within an appropriate small angle range in the direction in which the grip is operated.

As described above, the side grip levers 12, 12 are linked to both side clutches 8, 8 and the steering mechanism A, but these linkages are selectively switched. The linkage selection mechanism B will be explained.

As shown in Figure 2, the side grip lever 1
Wires 18 and 18 connected to wires 2 and 12, respectively,
A plate member 2 fixed to each of sleeves 20 and 20 that is fitted onto the first shaft 19 so as to be relatively rotatable around the horizontal axis Z
0a, 20a, said sleeves 20, 20
U-shaped frames 21, 21 or 22, 22 into which the fixed operation members 20b, 20b can be respectively inserted;
is fixed to the sleeves 24, 24 or 25, 25 which are fitted onto the second shaft 23 so as to be relatively rotatable, and a plate is fixed to each of the sleeves 24, 24 on one side of the sleeves 24, 24 or 25, 25. body 26, 26
Wires 28, 28 connecting the swinging arm 17 of the steering mechanism A from the left and right sides are connected to the plates 27, 27 fixed to the sleeves 25, 25 on the other side, respectively, to the side clutches 8, 8. The wires 29, 29 to be connected are connected, and the sleeves 20, 20, which are urged toward the extension side by the spring 30, are turned on and off by the planting clutch 32 linked to one of the sleeves 20, 20. By operating the planting clutch lever 31 for operation, the operation member 20 of each of the sleeves 20 and 20 is forcibly moved to the illustrated position.
b, 20b is switched from the side connected to the side clutches 8, 8 to the side connected to the steering mechanism A, and the planting clutch lever 31
By turning off the operating arms 20, 2, the operating arms 20, 2 are moved to the side where they are urged to expand by the spring 30.
0, the steering mechanism A is switched between the side grip levers 12 and 12 so that the engaging position of the operation parts 20a, 20a of the steering mechanism A is switched from the side that is linked to the steering mechanism A to the side that is linked to the side clutches 8, 8.
12 and a state in which the side clutches 8, 8 are linked to the side grip levers 12, 12 are configured.

In short, when the planting clutch lever 31 is in the engaged state, the side grip levers 12, 12
By grasping and operating either of the wheels 6, 6, the planting clutch lever 31 is operated.
However, when the clutch is in the disengaged state, by gripping and operating either of the side grip levers 12, 12, the machine body is caused to make a sharp turn around the wheels 6 which are in the non-drive state.

[Another Embodiment] The present invention can be applied not only to a walking type rice transplanter but also to a walking type tiller.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking-type agricultural vehicle according to the present invention, and FIG. 1 is a schematic plan view of the walking-type rice transplanter, and FIG.
The figure is a perspective view showing the specific configuration of the linkage selection mechanism.
The figure is a longitudinal cross-sectional rear view showing the drive structure of the wheels, and FIG. 4 is a side view of the walking rice transplanter. 5... Control handle, 6... Wheel, 8... Side clutch, 12... Side grip lever, 3
1... Work operation tool, A... Steering mechanism,
B...Linked selection mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of side clutches 8, 8 are provided to independently connect and disconnect the drive of the left and right wheels 6, 6, and a steering mechanism A is provided to steer the wheels 6, 6, The side clutches 8, 8 are linked to the side grip levers 12, 12 provided on the left and right sides of the steering handle 5, and the steering mechanism A is linked to the side grip levers 12, 12 provided on the left and right sides of the steering handle 5.
This walking agricultural work vehicle is provided with a link selection mechanism B that switches between linked states 2 and 12, and further links the link selection mechanism B with a work operating tool 31 for performing essential operations when turning the vehicle. 2. The work operation tool 31 is a planting clutch lever, and the connection selection is made such that the side clutches 8, 8 are linked to the side grip levers 12, 12 by a cutting operation of the planting clutch lever 31. The steering mechanism A is switched by switching the mechanism B and turning on the planting clutch lever 31.
The walking agricultural vehicle according to claim 1, which is a registered utility model, and is configured to switch the link selection mechanism B so that the side grip levers 12, 12 are linked to the side grip levers 12, 12.