JPS61141807A - Wheel lift apparatus of rice field 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) The present invention relates to a wheel lifting device for agricultural machinery for paddy fields, such as a rice transplanter or a water seeder.

(Prior art) Conventionally, propulsion wheels are provided on both the left and right sides of the aircraft body, which are operated up and down by separate left and right hydraulic cylinder devices, and the hydraulic switching valves of the hydraulic cylinder devices are switched by the vertical movement of the left and right ground bodies. A structure was known in which the aircraft is propelled by constantly changing its attitude to a horizontal state even when the left and right plowing depths change.

(Problems to be Solved by the Invention) In the configuration of the prior art described above, it is true that the machine is propelled while being controlled in a horizontal state, so it is difficult to plant seedlings when working in areas where there are large fluctuations in the plowing plate along the ridges of the field. It is characterized by the ability to perform accurate work by keeping the depth and sowing depth constant, but when working in areas where there is little fluctuation in the tiller, even if the machine tilts slightly, the control operation automatically corrects this, and the machine The side effect was that the vehicle was controlled in small steps from side to side, resulting in poor maneuverability. Also, if there is a control that does not allow left or right tilting when turning, etc., it is not possible to tilt the aircraft automatically, even though it would be easier to turn the aircraft while leaning slightly towards the turning side. had the disadvantage of making turning difficult.

(Means for Solving the Problems) The present invention takes the following technical means to solve the problems of the prior art described above.

That is, this invention provides an aircraft (1) equipped with agricultural work a (4).
) Separate left and right hydraulic cylinder devices a (1
Propulsion wheels (23) that operate up and down independently at 9) and (20)
) and (24), and between the propulsion wheels (23) and (24), there is a central grounding body (27) that moves up and down in contact with the soil surface, and a central grounding body (27) is installed between the propulsion wheels (23) and (24) on the outside of the propulsion wheels (23) and (24). are also provided with side grounding bodies (29) and (30) that move up and down in contact with the soil surface, and the left and right hydraulic cylinder devices (19) and (2
The hydraulic switching valves (34) and (35) of
) and (24) are provided, and an integrated control device is provided to integrally control the vertical movement of the central grounding body (27), and a switching device is provided that can switch between the independent control device and the integrated control device. This is the configuration of a wheel lifting device for a paddy field agricultural machine.

(Example) A drawing shows a wheel lifting device for a rice transplanter which is an example of this invention.
The details will be explained based on the following.

(1) is the fuselage, with an engine stand (3) attached to the front of the traveling mission case (2), and a longitudinally long connecting frame (5) that connects the rice transplanter (4) to the rear. ing. (6) is the engine, and (7) is the bonnet.

The rice transplanter (4) consists of a planting transmission case (8) attached to the body (1), a seedling tank (9) that reciprocates from side to side, a seedling planting tool (lO), and the like. (11) is a control handle whose base side is attached to the planting transmission case (8), and whose tip is branched to both sides and tilted rearward and upward.

(12) is a central hydraulic cylinder device for an independent control device, and the base of a cylinder (12a) is pivotally connected to the engine stand (3) at the left and right center portion of one aircraft (1) with a pin (13), and the piston ( 12b), a left-right center portion of a horizontal shaft (14) extending in the left-right and lateral directions is attached to the tip of the shaft (12b). The horizontal shaft (14) is a cylindrical body (15) attached to the engine stand (3).
・Vertical shaft (17) slidably inserted into (16)・(1
8), and is provided so that it can be moved back and forth while maintaining a horizontal state by moving the piston (12b) in and out.

(19) and (20) are the left hydraulic cylinder device and the right hydraulic cylinder device, each cylinder (19a) and (20a)
The base side is pivotally connected to the left and right end sides of the horizontal shaft (14), and the pistons (19b) and (20b) are attached to arms integral with the chain case to which the propulsion wheels described later are attached.

(21) and (22) are chain cases, which are located on both the left and right sides of the fuselage (1), and whose bases are pivoted to boss portions that wrap around drive shafts that protrude to the left and right sides of the traveling transmission case (2). (23) and (24) are left and right propulsion wheels that are mounted on the tip sides of the chain cases (21) and (22).

(25)-(26) are arms, and the chain case (2
Attach the chain case (2) to the base pivot metal part of 1) and (22).
1) and (22), and this arm (21
) and (22), the pistons (19b) and (20b) are pivotally connected to the pistons (19b) and (20b).

(27) is the central grounding body, and the left and right propulsion wheels (23)
24) Insert the pin (2) between the rear upper part and the connecting frame (5).
8) so that the front part can move freely up and down.

(29) and (30) are the left and right side grounding bodies;
Pins (31) and (32) are located on the outside of the right propulsion wheels (23) and (24), and the rear upper part is fixed to the outside of the pivot axis of the chain case (21) and (22). It is attached via a metal fitting that is freely rotatable to the body, and the whole body can be moved freely up and down.

(33) is a hydraulic valve case, which is attached to the upper part of the traveling transmission case (2), and includes hydraulic switching valves (34) and (35) for independent control of left and right sides, and hydraulic switching valves for integrated dual use. A valve (36) and a hydraulic switching valve (38) which is switched by a lever (37) which is a manual switching tool are provided. and the hydraulic switching valve (34)
The hydraulic switching valve (35) is installed on the left side grounding body (29).
) is attached to the right side grounding body (30), and the hydraulic switching valve (36) is attached to the central grounding body (27) with the interlocking device (39).
- Connected by (40) and (41). When the side grounding bodies (29)-(30) move upward from a certain range, the pistons (19b) and (20b) protrude, causing the propulsion wheels (23) and (24) to move downward, and within a certain range. When moving downward, the pistons (19b) and (20b) retract and the propulsion wheels (23) and (24) are linked to move upward, and the central grounding body (27) moves upward from a certain range. When the piston (12b) retracts, the left and right propulsion wheels (23)-(24) move downward together, and when they move downward from a certain range, the piston (12b) protrudes and the left and right propulsion wheels (23)-(24) move downward. 24) are provided so as to move upward together. The lever (37) is connected to the hydraulic switching valve (34).
) and (35) can be switched to retract the pistons (19b) and (20b), and is shown in FIG. 4 in conjunction with this switching. In addition, the symbols in Figure 4, (42)
(43) is the pump, (44) is the oil tank, and symbols (45) and (46) in Fig. 1 are the rear ground contacting bodies that level the ground after the propulsion wheels.Next, we will explain the function of the upper side. During seedling planting work, operate the lever (37) in the direction (A) when planting in a field where the depth of the tiller does not change much or in the central part of the field other than the ridges. Then,
The hydraulic switching valves (34) and (35) are switched in the directions of arrows (b) and ψ (c), and at the same time, the hydraulic switching valve (38) is switched in the direction of arrow (d).

Therefore, the pistons (19b) and (20b) of the hydraulic cylinder devices (19) and (20) are completely retracted, and the left and right propulsion wheels (23) and (24) are moved by the hydraulic cylinder devices (19) and (20). It is moved upward and becomes a fixed state, and in this state, the vertical movement is controlled by the central hydraulic cylinder device (12).

That is, when the central grounding body (27) moves upward above a certain range on the soil surface due to the depth of the plowing platform, the hydraulic cylinder device (12)
)'s piston (12b) retracts and pulls the horizontal shaft (14), and the pistons (19b)-(20b) completely retract the left and right propulsion wheels (23) through the hydraulic cylinder devices (19) and (20).・(24) is moved down at the same time. Conversely, when the tiller becomes shallow and moves lower than a certain range on the soil surface, the piston (12b) protrudes and the left and right propulsion wheels (23
)-(24) are simultaneously moved up. Therefore, since the left and right propulsion wheels (23) and (24) are not independently controlled up and down, the aircraft can be maneuvered without causing small left and right vibrations due to control.

Next, when planting at the edge of a ridge or in a field where the depth of the tiller varies greatly, return the lever (37) to the state shown in Figure 4. At this time, the hydraulic switching valves (34) and (35) can be freely switched, and the hydraulic switching valve (38) is also maintained in the state shown in FIG. Therefore, the operation of the piston (12b) of the central hydraulic cylinder device (12) is fixed in a fixed position, and the horizontal shaft (14) is stopped. The left and right hydraulic cylinder devices (19) and (20) are operated and controlled by the vertical movement of the left and right side grounding bodies (29) and (30).

That is, when the tiller is undulating in the same way at the same time, the left and right side grounding bodies (29') and (30) move up and down at the same time, and the left and right hydraulic switching valves (34) and (35) move in the same manner. The left and right hydraulic cylinder devices t (19) are switched in the direction
- (20) is activated and the side grounding bodies (29) and (30) are controlled so that they have the same appropriate grounding pressure. Also, when the depth of the tiller varies between the left and right sides, the side grounding bodies (29) and (30) may be pushed up by the soil surface due to the tilting of the machine body (1). The hydraulic switching valves (34) and (35) are switched individually by hanging them, and the hydraulic switching valve (36) is switched by the central grounding body (27).
) is switched and the propulsion wheels (23) and (24) are controlled, similarly the propulsion wheels (23) to (24) are specifically controlled up and down to prevent the aircraft (1) from tilting to the left or right. Ru.

In addition to interlocking the hydraulic switching valve (38) with the lever (37) as in the embodiment of the hydraulic circuit shown in FIG.
Pumps (42) and (43) can be switched by
) can be arbitrarily switched to the hydraulic switching valve (36) side, the left and right propulsion wheels (23) and
(24) can control any vertical movement of each of the grounding bodies (27), (29), and (30).

Also, in place of the lever (37), a planting clutch, <
(47) switches the switching valve (38) so that when turning the planting clutch to disengage, the propulsion wheels (23) and (24) are controlled only by the vertical movement of the central ground contact body (27). This will make turning easier.

(Operation and Effect) Since the present invention has the above configuration, the left and right propulsion wheels are independently controlled depending on the state of the tiller fluctuation in the field or the state of the tiller such as when planting along the ridge or in the center. The present invention has the advantage that the tiller can be controlled in an appropriate manner depending on the condition of the tiller, and that propulsion with good maneuverability can be obtained.

[BRIEF DESCRIPTION OF THE DRAWINGS] The figures show an embodiment of the present invention, in which Fig. 1 is a side view of the rice transplanter, Fig. 2 is a plan view showing the arrangement of the grounding body,
Figure 3 is a simplified plan view of the main parts, Figure 4 is a hydraulic circuit diagram, and Figure 5 is a simplified plan view of the main parts.
The figure shows a separate hydraulic circuit diagram. Symbols in the diagram (1) is the machine, (4) is the agricultural MC rice transplanter)
, (12), (19), and (20) are hydraulic cylinder devices, (23) and (24) are propulsion wheels, (27) is a central grounding body, and (29) and (30) are side grounding bodies. , (34)
・(35) Fist (36) and (38) are hydraulic switching valves, (
37) indicates a lever.

Claims (1)

[Claims] The left and right sides of the machine (1) with the agricultural machine (4) attached are located on both sides.
On the right, propulsion wheels (23) and (24) are provided which are independently operated up and down by separate hydraulic cylinder devices (19) and (20),
Between the propulsion wheels (23) and (24) is a central grounding body (27) that moves up and down in contact with the soil surface.
Side grounding bodies (29) and (30) which similarly move up and down in contact with the soil surface are provided on the outside of (24), and hydraulic switching valves for the left and right hydraulic cylinder devices (19) and (20) are provided. (34) and (35) are connected to the left and right side grounding bodies (29).
・An independent control device that controls the aircraft in the left and right horizontal directions in conjunction with (30), and separate from this independent control device, the left and right propulsion wheels (23) and (24) A wheel lifting device for a rice paddy farm machine, which is provided with an integrated control device that integrally controls up and down by vertical movement, and a switching device that can switch between the independent control device, the integrated control device, and the operation.