JPS60251809A - Running apparatus of walking type agricultural working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a traveling device for a walking agricultural machine, in which vertical movement of a pair of left and right propulsion wheels is controlled independently by a hydraulic cylinder device. A walking system in which agricultural equipment is attached to the rear of the aircraft.The hydraulic switching pulp is automatically controlled by the vertical movement of independent left and right grounding floats that touch the ground. This invention relates to a traveling device for a model agricultural machine.

[Prior art]

Conventionally, as seen in Utility Model Publication No. 51-49801,
A rice transplanting device was installed on a running vehicle with a structure in which a hydraulic cylinder device was installed on each left and right side to control the left and right independent propulsion wheels up and down, but the rice transplanting device was installed on an outer ground float installed on the outside of the propulsion wheels. In the installed system, this outer grounding float was always in contact with the topsoil surface of the paddy field.

[Problem that the invention seeks to solve]

According to the prior art, when working with a walking agricultural machine along a ridge, the outer ground float inevitably comes into contact with the ridge or climbs up on the ridge. The aircraft is strongly supported by the outer ground float, causing the aircraft to lean in the opposite direction to the ridge. Then, in order to correct this inclination, the propulsion wheels on the edge of the ridge move upwards, and the propulsion wheels on the opposite side of the ridge move downwards, causing the ground float for sensing to not reach the appropriate ground pressure, resulting in a slightly floating surface. Due to this, accurate planting of seedlings cannot be performed and incorrect control signals are given.

For this reason, in a vehicle in which the propulsion wheels are independently controlled, it is necessary to avoid the outside grounding float from coming into contact with or riding on the ridge, and careful maneuvering is required.

[Means to solve the problem]

This invention takes the following technical measures to solve the problems of the prior art described above. That is, this invention:
Separate hydraulic cylinder devices (7a) and (7b)
), a pair of propulsion wheels (5a,
), (5b) are made to move up and down independently, and the right and left propulsion wheels (5a), (5b) have a predetermined width in the left and right directions when opened in the front and back direction of the left and right outer width σ→. (14a) - (1
Hydraulic switching valve (10a) that can be switched individually with 4b)
- (10b) the hydraulic cylinder device (7a);
(7b) are independently operated and controlled, and left and right propulsion wheels (5a).

(25a) and (25b) are installed at the rear of the aircraft, and the control handle (A) and rice transplanting equipment, seeding equipment, etc. are installed at the rear of the aircraft. In the walk-behind agricultural machine equipped with the agricultural work device 08), the left and right outer grounding floats (25a), (
25b) is configured as a traveling device for a walking agricultural working machine, which can be hoisted higher than the ground surface by appropriate operation.

〔Example〕

One embodiment of the present invention will be described in detail based on the drawings. (1) is a traveling transmission case, on the front side of which is attached an engine stand (3) on which an engine (2) is mounted, and on the rear side is a cylindrical transmission case. A connecting frame (4) to which a working device is attached is provided.

(5a) and (5b) are propulsion wheels, which are supported on the tip sides of chain cases (6a) and (6b) whose bases are pivoted on both the left and right sides of the traveling transmission case (1), and are driven up and down while being rotated by transmission. It is set up so that it can move freely.

(7a) and (7b) are hydraulic cylinder devices, including cylinders (8a) and (8b) and pistons (9a) and (9b).
) and hydraulic switching valves (10a), (101)) integrally attached to the cylinder parts (8a), (8b).
The base sides of the cylinders (8a), (8b) are pivotally connected to the left and right sides of the engine stand (3) via support shafts OD, @, and the tip sides of the pistons (9aL, (9b) are It is pivotally connected to arms (13a), (18b) which are integral with the chain cases (6a), (6b) and protrude upward, and when the pistons (9a), (9b) protrude, the propulsion wheel (5a) ), (5b) are configured to move downward.

(14a) and (14b) are pressure-sensitive ground floats, the rear part of which is pivotally connected to the connecting frame (4) by pins αQ and α9, and the front part of which is attached to the expansion/retraction link (1!, the support shaft α by αQ).
It is attached to the sword (12), and the front part is configured to move freely up and down.And this pressure-sensitive ground float (14,
a), (141)) are the propulsion wheels (5a),
(5b) and is located within the left and right outer width ■ so as to be located inside than the outer surface of (5b).

(17a) and (17b) are the hydraulic switching valves (10a)
), (10b) are suspended from the rear downward direction, and a roller is attached to the lower end of the float, and is configured to come into contact with the upper surface of the pressure-sensitive ground floats (14a), (14b). And this float (14a)-(14
b) moves upward and approaches the engine stand (3) more than a predetermined value, the pistons (9a) and (9b) protrude, and conversely, when moving away, the pistons (9a) and (9b) are pulled. It is structured so that it can be easily incorporated.

(To) shows a rice transplanting device which is an example of agricultural equipment, and a planting mission case 09 is attached to the rear end of the connection frame (4), and a control handle is mounted rearward and upward on the rear of this planting mission case α9. It is installed facing the direction.

3υ is a seedling tank that carries seedlings and moves back and forth from side to side, (a)
is a seedling planting tool.

In addition, the planting mission case α9 consists of a main case (19a) in the left and right center, and sub cases (19b), (19b) that protrude from the left and right with pipes and are attached to the outer ends of the main case (19a).
Seedling planting tool handle, (224) is for each case (19a), (19
b), (19b) is attached with a crank and a swing arm. (a) is the operating rod of the seedling tank Qυ.

(C) is a connecting fitting.

(25a) and (25b) are outer grounding floats, which are located at the outer rear positions of the propulsion wheels (5a) and (5b), and the middle portion of which is pivotally attached to the upper rear part of the float via the placket (A) to the control handlebar. The pivot rods (27a) and (27b) are pivotally attached to the lower tip sides of the pivot rods (27a) and (27b) with pins (c), and the front upper portions are attached to the sub-cases (19b) and (19b) so as to be expandable and retractable.

(29a) and (29b) are float up and down operation levers,
It is made of a spring material that can be wetted with oil on the left and right sides, and its base is fixed to the rotating rods (27a) and (27b), and the intermediate part is attached to the handlebar (e), which has a notch in the vertical direction. By rotating the operating levers (29a), (29b) and locking them to the locking metal fittings (80a), (30b), the outside The ground flow (25a') and (25b) are configured to be able to move up and down separately. Note that 01) indicates the center rear float, (82a) to (32b) indicate the hydraulic pump, and (to) indicates the hydraulic tank.

Next, to explain the operation of the upper side, when seedlings are placed and stored in the seedling tank Q1) and each part is rotated by the engine (2), each of the grounding floats (14a), (14b), (25a),
(25b), C31) touch the surface of the paddy field and are propelled by the rotation of the propulsion wheels (5a), (5b). Further, the seedlings in the seedling tank Q1, which are being reciprocated from side to side by the operation of the seedling planting tools (A), (2), etc., are divided and successively planted onto the topsoil surface.

Then, when the plow in the paddy field was changing from side to side, during the promotion,
Naturally, the aircraft will lean left and right. At this time, the left and right pressure sensitive ground flow) (14, a),
(14b) operates in such a direction that one side is pushed up greatly on the surface of the topsoil, and the other side is suspended in the opposite direction.

Then, the hydraulic switching pulp (ioa) or (10b) on the side that has been pushed up switches the switching levers (17a) and (17b).
to switch the piston (9a) or (9) on that side.
b) protrudes, and the propulsion wheel (5a) or (
5b) is moved downward. In addition, the other wheel is reversely switched so that the propulsion wheel (5a) or (5b) moves upward in response to the weight of the aircraft body.

Therefore, the inclination of the aircraft is automatically corrected, and the aircraft is propelled without significantly leaning left or right.

In addition, the outer ground flow on the left and right outer sides) (25a), (
25b) reduces the horizontal tilting of the fuselage, prevents the rear of the fuselage from tilting significantly downward in response to the drive reaction force, and prevents unnecessary vibration of the fuselage.

Therefore, the depth of seedling planting should be approximately constant.

Planting high-performance seedlings involves work.

In this way, seedlings are planted using L7, but when planting along the ridge, the outer ground floats (25
a) and (25b) will ski near the ridge,
At this time, the outer grounding float on the edge of the ridge may be moved upwardly and held by operating the float up/down operating lever '(29a) or (29b) as shown in the example of FIG. At this time, since the front part of the float can freely move up and down, it can be moved up and down along the ridge.

However, by doing this, the aircraft support force is not lost due to the outer grounding floats on the ridge edge, and the aircraft can be prevented from leaning to the left or right due to the grounding floats (25a) and (25b). be.

This eliminates the possibility of the pressure-sensitive ground float accidentally moving up and down unexpectedly due to the outer ground float, causing erroneous control, as in the conventional technology, and the aircraft tilts to the left or right even when approaching a ridge. This allows for accurate promotion without delay.

[Effect]

The present invention uses the above-mentioned technical means to solve the drawback of the prior art in which the outer ground float causes the independent up and down control of the propulsion wheels to malfunction when working along the ridge, and to move the aircraft left and right even when working along the ridge. It has the effect of being able to accurately propel the vehicle without leaning too far.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is a simplified rear view showing the operating state, and Figure 4 is a hydraulic circuit. It is a diagram. Symbols in the figure (5a), (5b) are propulsion wheels, (7a),
(7b) is a hydraulic cylinder device, (10a), (10b
) is a hydraulic switching pulp, (14a), (14b) are pressure-sensitive ground floats, the handle is a control handle, (25a), (25
b) shows the outer ground float. Patent applicant name: Iseki Agricultural Machinery Co., Ltd. Representative: Masataka Iseki

Claims (1)

[Claims] Separately provided hydraulic cylinder devices (7a). In (7b), a pair of propulsion wheels (
5a) and (5b) are made to move up and down independently,
The left and right outer width of these left and right propulsion wheels (5a) and (5b)■
A pressure-sensitive ground float (14a)-(1) which is vertically installed with a predetermined width in the left and right directions and is movable up and down within the front and rear curves of the
Hydraulic switching pulp (10a) that can be switched separately in 4b)
- (10b) according to the hydraulic cylinder device C'1a)
- Outside grounding floats (25a), (2
5b) and is equipped with a control handle (E) and agricultural equipment such as a rice transplanter or a seeding device (E) on the rear of the machine, the left and right outer ground contact flow) (2)
5a) and (25b) are provided so as to be able to be lifted higher than the topsoil surface by appropriate operation.