JP3368385B2 - Rice transplanter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter having, for example, a seedling mounting table and planting claws for continuously performing seedling planting operations. 2. Description of the Related Art Conventionally, Japanese Utility Model Laid-Open Publication No. 63-75114 discloses
As shown, a link mechanism and an elevating cylinder are
The planting section is connected up and down freely through the
Hydraulic elevating valve for dynamic control and switching to switch between elevating valve
Replacement arm, and based on the setting of the sensitivity adjustment member,
Lifting / lowering bar via switching arm by float detection
There is a technology that automatically activates the lube . [0003] The prior art described above is a main technology .
Depressing the latch pedal causes the lifting cylinder to move up and down.
Prohibition of both cropping and lowering movements,
Since it prevents the ching phenomenon, it is specially separate from the lift valve.
The unload valve is provided, before me by the main clutch pedal
It is necessary to switch the unload valve,
There is a problem that the hydraulic structure of the damper cannot be easily simplified.
Further, as shown in Japanese Utility Model Application Laid-Open No.
Lock the lift sensor to neutral by turning off the switch.
Some technologies prohibit ascending or descending, but floating up and down
To control the lift valve via the sensitivity adjustment member
The neutral position of the float serving as the sensor
Is changed by the main clutch disengagement operation.
There is a problem that the structure for returning the neutral position cannot be easily configured.
For example, the planted part is lowered and the float is grounded
When the engine is stopped at, the float sinks and rises
Engine with down valve switched to the up side
There is a problem that it is not easy to obtain a structure capable of restarting the vehicle with a light load . [0004] Means for Solving the Problems] However, the present invention is traveling
At the rear side of the vehicle, the planting section is connected via a link mechanism and a lifting cylinder.
Hydraulic pressure that can be connected to move up and down and control the operation of the lift cylinder
Elevating valve and switching arm for switching the elevating valve
The float at the planted area based on the setting of the sensitivity adjustment member.
The lifting valve is automatically set via the switching arm
In a rice transplanter operated in
To the float pedal, and
When the main clutch pedal is disengaged when the attachment is raised
Therefore, it is configured to return the switching arm to neutral ,
For example, at the time of rice transplanting, the planting part is lowered to touch the field
The engine starter when the engine is stopped
Before actuating, depress the main clutch pedal,
A switch that has been switched to the ascending direction due to the sinking of the float
Since the replacement arm returns to neutral, specially set the unload valve
Need not be provided and the float must be neutrally supported.
No need to load the engine
Eliminates the problem of starting load and lift cylinder
Simplification of the hydraulic structure, prevention of battery deterioration and
It is possible to easily reduce the trouble of starting the gin . Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a hydraulic circuit diagram, FIG. 2 is a side view of a riding rice transplanter,
FIG. 3 shows a plan view of the same. In FIG. 3, (1) shows a traveling vehicle on which an operator rides. An engine (2) is mounted on a body frame (3), and a front axle case ( The paddy field traveling front wheel (6) is supported via 5), and a rear axle case (7) is connected to the rear of the transmission case (4), and the paddy field traveling rear wheel (8) is attached to the rear axle case (7). ). Then, a spare seedling mounting table (10) is mounted on both sides of the hood (9) covering the engine (2) and the like, and the step (1) is performed.
The transmission case (4) and the like are covered by a body cover (12) on which an operator rides via 1), and a driver's seat (13) is mounted on the upper part of the body cover (12). Then, a steering handle (14) is provided at the rear of the hood (9). [0006] In the figure, reference numeral (15) denotes a planting portion provided with a seedling mounting table (16) for six-row planting and a plurality of planting claws (17). Forward tilting seedling platform (1
6) is supported on a planting case (20) via a lower rail (18) and a guide rail (19) so as to be reciprocally slidable right and left, and a rotary case (21) is rotated at a constant speed in one direction. A pair of claw cases (22) and (22) are supported at the case (20) and symmetrically positioned around the rotation axis of the case (21), and the claw case (22) is provided.
(22) Attach the planting claws (17) and (17) to the tip. A supporting frame (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a three-point link mechanism (27) including a top link (25) and a lower link (26) is provided. Lifting cylinder (28) for connecting the support frame (24) to the rear side of the traveling vehicle (1) and raising and lowering the planting section (15) via the link mechanism (27)
To the lower link (26), and the front and rear wheels (6)
(8) is driven to move and at the same time, a seedling for one plant is planted from the seedling mounting table (16) which is reciprocally slid left and right.
7), the seedlings are continuously planted. [0007] In the figure, (29) is the main shift lever, (3)
0) is a sub-shift lever for planting elevating and working travel shifting, and (3)
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, (3)
4) is a center float for two-row equalization, (35) is a side float for two-row equalization, and (36) is a side fertilizer. Further, FIGS. 4, 5, 6, 7, 8, and
As shown in FIG. 9, the engine (2) is mounted on a pair of left and right body frames (3) and (3) via an engine stand (38) having a muffler stay (37) and vibration isolating rubber (39). The steering of the steering handle (14) for fixing the middle of the seedling stand frame (40) for attaching the spare seedling mounting table (10) on both sides to the upper surface of the vehicle body frame (3) and inserting it into the cylinder (41). The shaft (42) is erected on the upper surface of the reduction case (43), and the rear of the vehicle body frame (3) is fixed to the front side of the reduction case (43) by bolts. The steering case ( 44) and the steering case (44)
A steering output shaft (45) protrudes from the lower surface, the middle of an L-shaped steering arm (46) in a plan view is fixed to the output shaft (45), and a steering rod is attached to a knuckle arm (47) of the front wheel (6). The L-shaped one end of the steering arm (46) is connected via (48), while the hydraulic steering cylinder (49) is connected to the L-shaped other end of the steering arm (46). As shown in FIGS. 7 and 9, a pair of left and right main frames (50) (50) and brackets (51) (51) at the front end are provided on both sides of the rear part of each of the cases (43) and (44).
And the cover frames (52) and (53) supporting the foot portion of the body cover (12) are fixed to the front upper surface of the main frame (50) by welding. The main frame (50) and the sub-frame (54) are extended substantially parallel to each other in a side view, and the bearing (5) on the front lower surface of the main frame (50) is
The front axle case (5) is swingably attached to the rear part of the steering case (44), and the left and right front wheels (6) are protruded from both sides of the axle case (5) from between the frames (50) and (54). ) (6) is installed. As shown in FIGS. 5 and 8, the rear end of each of the frames (50) and (54) is fixed to the bracket (56) of the rear axle case (7) by bolts. Part of the transmission case (4) is fixed to the bracket (57) of the main frame (50), and each frame (50) (54) is located in front of the transmission case (4).
The steps are connected by a step frame (58), and a column-shaped support (59) provided with each link (25) (26) is erected at the rear of the main frame (50).
0) A pair of left and right upper frames (60) and (60) are obliquely provided between the front portion and the column (59), and a lifting cylinder (28) is attached to an intermediate portion of the upper frame (60). 5) In a mobile agricultural machine having a main frame (50) for supporting (7), the main frame (5) is provided below the main frame (50).
0) a sub-frame (54) is provided substantially parallel to the side view, and a step (11) is provided with a step (11). And connect the other end of the step frame (58) to the cover frame (5).
3). Further, as shown in FIGS. 5 and 6, a belt continuously variable transmission mechanism (64) having input / output pulleys (61) and (62) and a belt (63) is provided, and an output shaft (65) of the engine (2) is provided. ), The input shaft (66) of the reduction case (43) is connected via the continuously variable transmission mechanism (64), and the transmission case (4) is connected to the reduction case (43) via the output shaft (67). The front axle case (5) is connected to the transmission case (4) via the front running drive shaft (68), and the planting case (20) is connected to the transmission case (4) via the planting drive shaft (69). ), And the continuously variable transmission mechanism (64) and the speed reduction case (43)
The engine (2) output through the transmission case (4)
And the multi-speed transmission output by the main transmission lever (29) of the transmission case (4) is transmitted to the front and rear wheels (6).
(8) is transmitted through each axle case (5) (7). A tension roller (70) for tensioning the belt (63) and pulleys (61) and (62).
Input / output cams (71) (72) for changing the winding diameter of the belt (63), connecting rods (73) for interlocking the cams (71) (72), and connecting rods (73). A potentiometer (74) for detecting the amount of displacement of the cams (71) and (72), and a transmission link (76) for rotatably supporting the main frame (50) via a shaft (75).
One end of the link (76) and the connecting rod (73) are connected by a speed changing rod (77), and the other end of the link (76) is connected to the telescopic output shaft (79) of a speed changing motor (78).
The motor (78) is attached to a bracket (80) of the main frame (50), and the input / output cams (71) (72) are connected via a link (76) by forward / reverse rotation control of the motor (61). Rotate the input / output pulley (6
1) The width of the belt (63) is changed by changing the width of the pulleys (61) and (62) and the belt (6).
The gear ratio of 3) is configured to be changed steplessly. As shown in FIG. 1, a hydraulic elevating valve (81) for controlling the operation of the elevating cylinder (28) is provided on the right main frame (50) via a valve frame (82). ) To the hydraulic operating shaft (8
3) a sub-transmission lever (30) is provided via the control valve, and a switching arm (84) for switching the elevating valve (81) is provided on the hydraulic operating shaft (83), and the sensitivity is supported by the lever shaft (85). A sensitivity changing link (87) is connected to the adjustment lever (31) via a fulcrum shaft (86), and the link (87) and the switching arm (84) are connected by a rod (88). The fulcrum shaft (9) is attached to the planting arm (90) of the planting depth adjusting shaft (89) provided in (20).
While the rear part of the center float (34) is attached via 1), the sensor link (92) is connected to the front part of the center float (34), and a pin (93) is connected to the correction link (93) connected to the planting depth adjusting shaft (89). 94) and the sensor link (92) via the elongated hole (95), and the inner wire (97) protrudes from the outer wire (96) fixing one end to the sensor link (92) and is connected to the pin (94). The inner wire (97) protrudes from the outer wire (96), which fixes the other end to the bracket (98), and is connected to the sensitivity changing link (87). Thus, the lift valve (81) is connected via the sensor link (92), the wires (96) and (97), the sensitivity change link (87), the rod (88), and the switching arm (84). Of the center float (34) through the sensitivity change link (87), the wires (96) (97), and the sensor link (92) by operating the adjustment lever (31). The reference height is changed. Further, as shown in FIGS. 1 and 9, a main clutch (9) is provided between the input pulley (62) and the input shaft (66).
9), and the pedal shaft (10) is attached to the main frame (50).
0) The main clutch pedal (32) which is pivotally supported via
And the main clutch (99) are connected by the clutch rod (101), and the main clutch (9) is depressed by depressing the pedal (32).
9) and the main clutch pedal (32)
Is connected to the switching arm (84) via the hydraulic pressure release wire (102), and the center float (34) is in the front-up position by the landing of the planting portion (15), and the elevating valve (81) is in the raised position. Even in the case of switching, the wire (102) returns the switching arm (84) to the neutral position in conjunction with the operation of depressing the main clutch pedal (32) to release the main clutch (99), and forcibly moving the elevating valve (81). It is configured to be neutrally supported. As is apparent from the above, after the traveling vehicle (1)
Through a link mechanism (27) and a lifting cylinder (28)
And connect the planting section (15) so as to be able to move up and down freely.
A hydraulic lift valve (81) for controlling the operation of the damper (28);
A switching arm (84) for switching the lift valve (81) is provided.
Planting sensitivity adjusting lever (31), which is a sensitivity adjusting member
Of the float (34) of the planting section (15) based on the setting of
Elevating valve via the switching arm (84) by the extension operation
In a rice transplanter that automatically operates (81),
Replacement arm (84) with main clutch pedal (32)
(102) The float (34) is connected and
When the main clutch pedal is
The switching arm (84) is neutralized by the turning operation of (32).
Configure to revert. And for example, during rice transplanting, planting
Lowering the part (15) to ground on the field and engine
Starter of engine (2) when (2) is stopped
Depress the main clutch pedal (32) before operating
And by the sinking of the float (34) in the ascending direction
The switched switching arm (84) is returned to neutral,
There is no need to provide a special unload valve.
There is no need to neutrally support the
The load of the raising operation of the engine (28) causes the engine (2) to start.
Eliminates the problem of loading and eliminates the lifting cylinder (2
8) Simplification of hydraulic structure and prevention of battery deterioration and
Reduce the trouble of starting the engine. Further, as shown in FIGS. 2, 10, 11, and 12, a bracket (1) is attached to the support frame (24).
03) Double acting rolling cylinder via (104)
And install the piston rod (1) of the cylinder (104).
05) At both ends, support the left and right supports (10)
6) Connected to (106) and the rolling fulcrum shaft (2)
Rolling cylinder (1)
04), and the manual lever (1
07), a bypass oil passage (109) having a safety valve (108) that opens and closes by switching is provided.
9) Connect the left and right cylinder chambers of the rolling cylinder (104), open the left and right cylinder chambers of the rolling cylinder (104) by opening the safety valve (108), and the controller that automatically controls the rolling cylinder (104) fails. Even in this case, the inclination of the planting section (15) is manually corrected as soon as possible, and the planting operation is continued in a field under favorable conditions. As shown in FIG. 12, a hydraulic pump (110) is provided which is mounted on the engine (2) and is directly driven by the engine (2). The transmission case (4) is used as a hydraulic oil tank. The pressure oil discharge side of the hydraulic pump (110) is connected to a high pressure oil passage (111).
Control valve (113) that branches to a low-pressure oil passage (112), a steering valve unit (115) including a steering valve (114) that is switched by a steering handle (14), and an auxiliary transmission lever (30). A lift valve unit (11) having a switchable lift valve (81)
6) and a rolling valve unit (118) including a rolling valve (117). The steering and elevating valves (114) and (81) are connected in series to the hydraulic pump (110) through the high-pressure oil passage (111) of the flow control valve (113), and the steering valve (114) is connected. ) With the lifting valve (8
1), and a rolling valve (117) is connected to a hydraulic pump (110) through a low-pressure oil passage (112) of the flow control valve (113), so that steering and planting and lowering can be performed. Steering cylinder (49) and lifting cylinder (2)
8) and the rolling cylinder (104) for controlling the horizontal inclination of the planting section (15) is connected to the hydraulic pump (110).
It is driven by a leftward and rightward solenoid (1
19) The rolling valve (11) is provided by (120).
7) is switched to operate the rolling cylinder (104), and a horizontal control controller (not shown) formed by a microcomputer sends the leftward and rightward solenoids (11).
9) Connect the solenoids (119) and (120) by connecting the (120) and outputting a rolling sensor output such as a side float (35) for detecting the left-right inclination of the planting section (15) and a manual operation switch (not shown). 120) is actuated, and the planting section (1) by the rolling cylinder (104) is operated.
5) Automatic or manual horizontal control, and the starter is operated by key switch operation to activate the engine (2).
When the main control is started, the main clutch pedal (32) is depressed to operate the lift control valve (81) in the neutral or lowered position to thereby control the flow control valve (11).
3) The configuration is such that the discharge oil of the hydraulic pump (110) returns to the transmission case (4) with almost no load via the steering valve (114) and the elevating valve (81). As is apparent from the above embodiments, the present invention provides a link mechanism (27) and a lifting mechanism on the rear side of a traveling vehicle (1).
The planting section (15) can be linked up and down freely via the Linda (28).
Hydraulic raising and lowering to control the operation of the raising and lowering cylinder (28)
Switching between valve (81) and lift valve (81)
Arm (84) provided for setting sensitivity adjustment member (31)
Based on the operation of detecting the float (34) of the planting section (15)
Therefore, the lift valve (81) is switched via the switching arm (84).
In the rice transplanter that automatically operates
(84) to the main clutch pedal (32)
2) Connect the float (34) to the planting section
(15) When the main clutch pedal (3
2) which was constructed in <br/> so back to the neutral switching arm (84) by the switching operations, for example during planting operation, the planting unit (1
5) Lower to touch the field and stop the engine (2).
When stopped, start the engine (2) starter
Before the main clutch pedal (32) is depressed,
It is switched upward by the sinking of the float (34)
Since the switching arm (84) returns to neutral,
There is no need to install a load valve and the float (3
4) It is not necessary to support neutral, and the lifting cylinder (2
8) The load of the ascent operation is added to the starting load of the engine (2).
Troubles can be eliminated and the lifting cylinder (2
8) Simplification of hydraulic structure and prevention of battery deterioration and
It is possible to easily reduce troubles such as starting the engine .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a planting section elevating operation section. FIG. 2 is a side view of the riding rice transplanter. FIG. 3 is a plan view of the same. FIG. 4 is a side view of the traveling vehicle body. FIG. 5 is a plan view of the same. FIG. 6 is a side view of the belt continuously variable transmission mechanism. FIG. 7 is a side view of a front portion of a traveling vehicle body. FIG. 8 is a side view of a rear portion of the traveling vehicle body. FIG. 9 is a plan view of a front portion of a traveling vehicle body. FIG. 10 is a side view of a rolling cylinder unit. FIG. 11 is a sectional explanatory view of the same. FIG. 12 is a hydraulic circuit diagram. [Description of Signs] (1) Traveling vehicle (15) Planting part (27) Link mechanism (28) Elevating cylinder (31) Planting sensitivity adjustment lever (sensitivity adjustment member) (32) Main clutch pedal (34) Center float ( 81) Lift valve (84) Switching arm (102) Wire

Claims (1)

( 1) A link mechanism (27) on the rear side of the traveling vehicle (1).
And raising the planting section (15) via the lifting cylinder (28).
It is connected so as to be able to descend freely, and the operation of the elevating cylinder (28) is controlled.
Disconnect the hydraulic lift valve (81) and the lift valve (81).
A switching arm (84) for changing the sensitivity is provided.
Float (34) of planting part (15) based on the setting of 1)
The lifting operation via the switching arm (84) by the detection operation of
In a rice transplanter that automatically operates the lube (81),
Connect the switching arm (84) to the main clutch pedal (32).
The ear (102) is connected and the posture of the float (34)
Raises the main clutch pedal under the condition that the planting section (15) is raised.
Switch arm (84) to neutral by turning off the lever (32)
A rice transplanter characterized by being configured to return to rice.