JPH01120204A - Level controlling device for farm machine - Google Patents

Abstract

PURPOSE:To provide the titled device usable with little restriction in pipings, etc., having accurately swinging pendulum and effective in rolling a farm machine according to the swing angle of a pendulum placed to the right or left side of a center line of the farm machine and swinging in a plane perpendicular to the moving direction. CONSTITUTION:A pendulum 45 for detecting the lateral inclination of a machine is placed at a position shifted toward a side of the machine. The pendulum 45 swings in a plane perpendicular to the moving direction of the machine. When the pendulum 45 swings, a subcylinder valve is changed over to extend or contract a subcylinder 39. Accordingly, the chain case 6 of a side is vertically rotated to effect the rolling of the machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J This invention relates to a horizontal control device for horizontally controlling a working part of an agricultural machine such as a rice transplanter.

[Prior Art] There is a horizontal control device that detects the left and right inclination of a planting work unit that includes a planting device and the like and raises and lowers left and right ground wheels separately to keep the work unit level at all times.

[Problems to be Solved by the Invention] In the above-mentioned conventional horizontal control device, the inclination sensor was installed at the left and right center of the aircraft body, which is not convenient for piping such as hydraulic hoses, and is difficult to inspect and adjust. There was a problem. Moreover, if the degree of inclination is small or if the change in degree of inclination is gradual, the pendulum of the inclination sensor may not swing, and there is a problem in that appropriate horizontal control cannot be performed.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the horizontal control device according to the present invention is a horizontal control device for an agricultural machine in which the working part is provided so as to be able to swing up and down in a plane perpendicular to the direction of movement, and the working part can be freely swung in the plane perpendicular to the direction of movement. The aircraft is characterized in that it is equipped with a rolling means for raising and lowering one side of the ground ring according to the amount of swing of the pendulum, and that the pendulum is disposed to either the left or right side with respect to the center line of the aircraft body.

[Function] Since the pendulum is placed close to one side of the fuselage, there are few restrictions on piping, etc., and inspection and adjustment of the pendulum is easy. In addition, by installing the pendulum on the same side as the grounding wheel that is raised and lowered during horizontal control, the momentum of the pendulum can be increased when the slope is tilted, and the pendulum is accurate even when the slope is small or the slope changes slowly. It becomes easier to sway.

[Example] An embodiment shown in one drawing will be described below.

The agricultural machine 1 shown in FIGS. 1 and 2 is a walk-behind rice transplanter, in which an engine 3 is disposed at the front of a mission case 2, and a rotating housing protrudes from the side of the mission case 2.
At the tips of the rings 5, 5, a chain case 6.6 is provided rearward so as to be able to rotate up and down, and at the rear end of the chain case 6.6 is a traction wheel 7.7 which is a grounding wheel that supports the aircraft body. is installed. Furthermore, a main frame 9 is provided to protrude rearward from the rear part of the mission case 2, and a planting part 10, which is a working part, is provided at the rear end.

The planting section 10 includes a seedling tank 11, a planting device 12, a handle 13, and the like. The seedling tank 11 is slidably supported by a rail 15 and a support frame 16 attached to a rear frame 14, and is laterally reciprocated by a lateral movement device 17. In addition, the planting device i! 12, the planting rod 18 moves up and down in a predetermined trajectory, and the planting claw 19 provided at the tip thereof divides and takes out the seedlings from the seedling mat held in the seedling tank 11; Plant it in the field.

A fuel tank 21 and a fertilizer tank 22 are provided at the top of the aircraft. Fertilizer tank? The fertilizer in Z is fed out into the feeding pipe 24 by the feeding device 23, and is supplied to the field from the lower end of the feeding pipe. The upper parts of these machines are covered with a bonnet 25, and a spare seedling stand 26 is further provided above the bonnet 25. Further, a float 29 is provided on the lower side of the fuselage, the rear part of which is rotatably mounted on a support shaft 27, and the front part of which is supported by an expansion/contraction link 28, the height of which is adjustable.

The traction wheels 7.7 are raised and lowered relative to the fuselage by means of a lifting device 30 constructed in the following manner. That is, a main body part 31 having a hydraulic pump, valves, etc. is provided at the upper part of the mission case 2, and a main cylinder 34 is fixedly provided on the back surface of the main body part 31 so as to face rearward. A balance rod 35 is pivotally attached to the rear end of the main cylinder so as to be able to swing freely in a horizontal plane, and both left and right ends of the balance rod 35 are connected to the rotating housing 5 by connecting rods 36 and 36.
．． It is connected to an arm 38, 38 protruding from the upper surface of 5. The left connecting rod 36 among the connecting rods 36 (L, R)
(L) has a sub-cylinder 39 interposed in the intermediate portion.

FIG. 4 is a hydraulic circuit diagram of the lifting device 30, and the hydraulic pump 40
is connected to a main cylinder valve 42 and a sub cylinder valve 43 via a flow dividing valve 41. Note that a variable throttle valve 44 is provided in the hydraulic path to the sub-cylinder valve 43. Main cylinder valve 42 is float 29
It can be switched according to the vertical movement of. On the other hand, the sub-cylinder valve 43 is switched according to the swing of a pendulum 45 of a tilt sensor provided on the left side of the main body 31.

This pendulum 45 is a means for detecting the left and right inclination of the aircraft, and as shown in FIG. It is designed to be able to swing freely. Since the tip of the spool 49 of the sub-cylinder valve is loosely fitted into the elongated hole 48 bored in the middle of the rod 45a, the valve 43 is switched when the pendulum 45 rotates. When the pendulum 45 is located at the center, the valve 43 is in a neutral state, and the pendulum 4
5 swings to the right with respect to the fuselage, the valve 43 is switched in the direction of extending the sub-cylinder 39, and when it swings to the left, the valve 43 is switched in the direction of retracting the sub-cylinder 39.

The pendulum 45, sub cylinder valve 43, etc. are the sub cylinder 3.
Since it is provided on the same side as 9 and offset from the center of the fuselage, piping from the sub-cylinder valve 43 to the sub-cylinder 39 is easy, and other hydraulic piping and operation wires are provided in the center of the fuselage. be able to. Furthermore, since the pendulum 45 can be easily observed from the left side of the aircraft, inspection and adjustment of the pendulum is easy. Furthermore, this pendulum 4
5 is provided in the bonnet 25 at the top of the fuselage, so it does not come into contact with the ridge or get tangled with other objects.

When using this rice transplanter l in rice fields, float 29
The main cylinder valve 42 is switched according to the vertical movement of the cylinder. When the main cylinder 34 expands and contracts, the left and right traction wheels 7.7 simultaneously move up and down by the same amount relative to the fuselage.

When the machine body tilts to the left or right due to irregularities on the top soil surface of the field, the pendulum 45 swings relative to the machine body, which causes the sub cylinder valve 41 to be switched to the appropriate direction. The sub-cylinder 39 expands and rotates the left chain case 6 upward, causing the left wheel 7 (L) to rise and return the aircraft to a horizontal state. On the other hand, when the aircraft descends to the left, the pendulum 45 swings to the left with respect to the aircraft, so the sub cylinder 39
contracts, lowering the left wheel 7(L).

Since the pendulum 45, which is the left-right tilt detection means, is provided on the same side as the sub-cylinder 39, which is the rolling means,
The amount of vertical movement of the pendulum 45 during control is large, and the pendulum 4
Since a moderate impact is applied to the pendulum 45, the pendulum 45 can swing accurately against the aircraft body even when the degree of inclination is small.

[Effects of the Invention] As is clear from the above description, in the horizontal control device for an agricultural machine according to the present invention, the pendulum for detecting left and right inclination is provided closer to one side of the machine body, so piping etc. are easy. can be,
Moreover, the pendulum's movement became more accurate and reliable, and it became possible to always perform appropriate horizontal control.

[Brief explanation of the drawing]

Figure 1 is a side view of a rice transplanter as an embodiment of the present invention, Figure 2 is a side view of a rice transplanter as an embodiment of the present invention;
The figure is a plan view, FIGS. 3(a) and 3(b) are a plan view and rear view of the main parts, and FIG. 4 is a hydraulic circuit diagram of the lifting device. 1... Rice transplanter (agricultural work a), 7... Traction wheel (grounding wheel), 10... Planting section (work section), 11... Seedling tank, 29... Float, 30...・Lifting device, 34・
...Main cylinder, 39...Sub cylinder, 42
, 43... valve, 45... pendulum. Patent applicant Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] (1) A horizontal control device for an agricultural machine in which the working part is installed so that it can swing up and down in a plane perpendicular to the direction of movement, and the amount of swing of a pendulum that can swing freely in the plane perpendicular to the direction of movement. 1. A horizontal control device for an agricultural machine, comprising a rolling means for raising and lowering a grounding wheel on one side according to the movement of the ground wheel, and the pendulum is provided offset to either the left or right side with respect to the center line of the machine body.