JP2522989Y2 - Moving agricultural machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a mobile agricultural machine such as a riding rice transplanter having, for example, a planting section that can be moved up and down.

[Background Art] Conventionally, as shown in Japanese Utility Model Laid-Open No. 60-160107, when the traveling speed change lever is operated in reverse, the working unit is raised, and when the working unit is raised, the lifting hydraulic valve is switched to neutral. There is technology.

"Problem to be solved by the invention" The conventional technology reduces the operating time of the relief valve to prevent the engine horsepower shortage, etc.However, since the return rod was connected to the lower link to return the hydraulic valve to neutral, return There are problems such as simplification of the neutral return mechanism including the rod and improvement in adjustment operability of the neutral return time, and the like.

Means for Solving the Problems However, the present invention provides a mobile agricultural machine in which a hydraulic valve is switched by a reverse operation of a traveling shift lever and a hydraulic cylinder is operated to raise a working unit. A sensor for detecting, a neutral return member for switching the hydraulic valve to neutral, and a timer for automatically operating the neutral return member after a predetermined time has elapsed when the sensor detects a reverse operation. .

"Operation" Therefore, a sensor such as a switch that is turned on by the reverse operation of the traveling speed change lever and a neutral return member such as a solenoid that switches the hydraulic valve to neutral are provided, and the output is delayed by the time required for the ascent operation of the working unit. By electrically connecting the sensor and the neutral return member via the timer to perform, since the hydraulic valve returns to neutral when the working unit rises,
There is no need to connect a hydraulic valve to the lower link by providing a return rod as in the past, and it is easy to simplify the neutral return mechanism of the hydraulic valve and improve the operability of adjusting the neutral return time, The sensor and the neutral return member can be easily attached without substantially changing the design of the conventional structure in which the working portion rises.

"Example" Hereinafter, an example of the present invention will be described in detail with reference to the drawings. First
The figure is a side view of a main part, FIG. 2 is a side view of a riding rice transplanter,
FIG. 3 shows a plan view of the vehicle, in which (1) is a traveling vehicle on which an operator rides, and a rear end of a body frame (3) on which an engine (2) is mounted is connected to a transmission case (4). Front paddle traveling front wheels (6) are supported on both front sides of the transmission case (4) via front axle cases (5), and paddy fields are mounted on both rear sides of the transmission case (4) via transmission cases (7). The traveling rear wheel (8) is supported. A spare seedling mount (10) is attached to both sides of the hood (9) covering the engine (2),
The transmission case (7) and the like are covered with a vehicle body cover (12) forming a step (11), and a driver's seat (13) is mounted on the upper part of the vehicle body cover (12). (9) A steering handle (14) is provided at the rear.

Further, in the figure, (15) is a planting section which is a working section having a seedling mounting table (16) for multiple planting and a plurality of planting claws (17). Rotary case (16), which supports the seedling mounting table (16) of the type with a planting case (20) via a guide rail (18) and a guide rail (19) so as to be reciprocally slidable left and right, and rotates at a constant speed in one direction. 21) is supported by the planting case (20), and a pair of planting claw cases (22) and (22) are disposed at symmetrical positions about the rotation axis of the case (21). 22) Attach the planting claw (17) to the tip, and rotate the rotary case (21) once to rotate the two planting claws (1).
7) (17) is alternately moved to plant two seedlings.

A pivot (23) is provided on the front side of the planting case (20).
A support frame (24) is provided via a top link (2
5) and a support frame (2) on the rear side of the traveling vehicle (1) via a three-point link mechanism (27) including a lower link (26) (26).
4) is connected, and a lifting hydraulic cylinder (28) for raising and lowering the planting section (15) via the link mechanism (27) is provided. The front and rear wheels (6) and (8) are driven to travel at a substantially constant speed. At the same time, the seedlings for one plant are taken out from the seedling mounting table (16), which is reciprocally slid left and right, by the planting claws (17), and the seedlings are continuously planted.

In the figure, (29) is a traveling speed change lever, (30) is a planting elevating lever that also serves as an auxiliary speed change lever, (31) is a planting sensitivity adjustment lever, (32) is a traveling clutch pedal, (33) (33)
Are left and right brake pedals, (34) and (35) are floats for paddy leveling, and the floats (34) and (35) below the planting case (20) via a planting depth adjustment link (36). ).

Further, as shown in FIG. 4, a hydraulic valve (37) which is switched by operating a planting elevating lever (30) is provided, and a hydraulic pump (38) is connected to a hydraulic cylinder (28) via the valve (37).
And a relief valve (39) is provided in parallel with the valve (37) to supply high-pressure oil from a hydraulic pump (38) driven by the engine (2) to the cylinder (28) via the valve (37). Then, the planting section (15) is raised, and the relief valve (39) is operated by a load equal to or greater than a predetermined value to unload the hydraulic pump (38).

Further, as shown in FIG. 5, the transmission and lifting lever shaft (42) is mounted on the body frame (3) via bearings (40) and (41).
(43) is provided, and the gear lever (29) and the lifting lever (30) are connected and supported on each lever shaft (42) (43).
As shown in FIG. 6, the main speed change fork shaft (44) of the transmission case (4) for switching between forward speed on the planting and road and reverse speed.
Then, the transmission lever shaft (42) is connected via the transmission arms (45) and (46) and the transmission rod (47).

Further, as shown in FIGS. 5 and 7, a transmission case (4) for switching the _first to _fourth speeds (F _{1 to} F ₄ ) of the sub-speed change.
The springs (50) and (51), the rods (52) and (53), and the link (54) are attached to the first and second fork shafts (48) and (49) of the auxiliary transmission.
(55) through the sub-transmission first and second arms (56) (5
7) and the first and second cam plates (5
8) Install (59) on the lifting lever shaft (43), and
6) Roller (60) (61) of (57) to each cam plate (58) (5
9) and a cam plate (5
Rotation of 8) (59), shaft (62) to swing the arms (56) (57) around a, it is configured to perform sub transmission (F ₁ to F _4).

Further, an elevating arm (64) is provided for abutting on the spool (63) of the hydraulic valve (37), and the arm (64) is provided on the elevating lever shaft (43), and the elevating (DN), neutral (N) and The spool (63) is moved forward and backward through the arm (64) by the switching operation of the ascending / descending lever (30), and the hydraulic valve (37) is switched to operate the ascending / descending cylinder (28). A gas spring (66) is connected to (43) via a link (65), and the spring (66) resiliently presses the arm (64) against the spool (63) to switch the hydraulic valve (37) to the raised state. It is composed.

Further, as shown in FIGS. 1, 6, and 8, a detent plate having a notch (67) for locking the elevating lever shaft (43) to neutral (N) and descent (DN) and the first sub-speed. (68), and the detent plate (68) is moved up and down by the lever shaft (4
3) and swing arm (7
0) roller (71) with the spring (72) to the notch (6).
7), the lifting lever shaft (43) is locked against the gas spring (66) to lock the lifting arm (64), and as shown in FIG. ), The traveling speed change lever (29) is switched to the forward and reverse positions on the road and planting, and as shown in FIG. 10, the up (UP),
Neutral (N), descent (DN) and planting clutch disengagement, sub-shift 1
Speed (F ₁ ) and planting clutch engaged and marker touching, auxiliary transmission 2
The elevation lever (30) is configured to be switched to each of the speed (F ₂ ), third speed (F ₃ ), and fourth speed (F ₄ ) positions.

In addition, the back interlocking arm (74) is connected to the shift lever shaft (42).
And a roller (7) contacting the swing arm (70).
5) is pivotally supported by the back interlocking arm (74), and the roller (75) is brought into contact with the swing arm (74) by the reverse operation of the shift lever (29), and the arm (74) is opposed to the spring (72). 74) Remove the roller (71) from the notch (67), rotate the lifting lever shaft (43) by the force of the gas spring (66),
The lifting arm (64) is brought into contact with the spool (63), the hydraulic valve (37) is switched to the raised state, the cylinder (28) is raised, and the planting section (15) is raised. .

Also, the reverse operation of the shift lever (29) is performed by the shift arm (4
5) A switch (76) for detecting via
A link (79) is connected to the detent plate (68) via the pin (77) and the slot (78), and the link (79) is pulled to move the detent plate (68) from the ascending (UP) position to the neutral (N) position. ) A solenoid (80) that is an automatic neutral return member that returns to the position is provided.
The on-delay timer (8) delays the output of the switch (76) by the time necessary for the switch to rise to a predetermined height.
1), and the switch (7) is provided through the timer (81).
6) Connect the solenoid (80) and shift lever (29)
When the planting section (15) is raised by the reverse operation, the solenoid (80) is operated, the lifting arm (64) is returned to the neutral state via the detent plate (68), and the hydraulic cylinder (28) is raised. The hydraulic valve (37) is automatically switched from a rising state to a neutral state. As is apparent from the above description, in a mobile agricultural machine in which the hydraulic valve (37) is switched by the reverse operation of the traveling speed change lever (29) and the hydraulic cylinder (28) is operated to raise the planting section (15) as a working section. A switch (76) serving as a sensor for detecting a reverse operation of the traveling speed change lever (29); and a hydraulic valve (2).
Solenoid (8) is a neutral return member that switches 8) to neutral.
0) and a timer (81) for automatically activating the solenoid (80) after a lapse of a predetermined time when the switch (76) detects a reverse operation.

"Effects of the Invention" As is apparent from the above embodiment, the present invention switches the hydraulic valve (37) by the reverse operation of the traveling speed change lever (29), operates the hydraulic cylinder (28), and operates the working unit (15). In the moving agricultural machine to be lifted, the traveling shift lever (29)
(76) for detecting reverse operation, a neutral return member (80) for switching the hydraulic valve (28) to neutral, and the neutral return after a lapse of a predetermined time when the sensor (76) detects reverse operation. A sensor (76) such as a switch that is turned on by a reverse operation of the traveling speed change lever (29), provided with a timer (81) for automatically operating the member (80);
A neutral return member (80) such as a solenoid that switches the hydraulic valve (37) to neutral is provided, and a sensor (76) is output via a timer (81) that outputs a delay by the time required for the ascent operation of the working unit (15) By electrically connecting the neutral return member (80) and the working part (15), the hydraulic valve (3
7) Return to neutral, eliminating the need to provide a return rod and connecting the hydraulic valve (37) to the lower link as in the past, simplifying the neutral return mechanism of the hydraulic valve (37) and adjusting the neutral return timing The operability and the like can be easily improved, and the sensor (7
6) and the neutral return member (80) can be easily attached.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing an embodiment of the present invention, FIG. 2 is a side view of a riding rice transplanter, FIG. 3 is a plan view, FIG. 4 is a hydraulic circuit diagram, and FIG. Explanatory drawing, FIG. 6 and FIG.
FIG. 8 is an explanatory view of a shift operation part and a lifting operation part, FIG. 8 is a partial view, and FIGS. 9 and 10 are explanatory views of a lever guide. (15) Planting part (working part) (28) Hydraulic cylinder (37) Hydraulic valve (80) Solenoid (automatic neutral return member)

Claims (1)

(57) [Scope of request for utility model registration] 1. A mobile agricultural machine in which a hydraulic valve (37) is switched by a reverse operation of a traveling speed change lever (29) and a hydraulic cylinder (28) is operated to raise a working portion (15). ) A sensor (76) for detecting a reverse operation, a neutral return member (80) for switching the hydraulic valve (28) to neutral, and a neutral state after a lapse of a predetermined time when the sensor (76) detects the reverse operation. A mobile agricultural machine comprising a timer (81) for automatically operating a return member (80).