JP3445888B2 - Rice transplanter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type rice transplanter having a seedling mounting table and planting claws for continuously performing seedling planting operations. [0002] In a shift control means for performing a stepless shift of the planting speed by shifting the continuously variable transmission mechanism with a shift lever, the planting speed is set to a specific speed. If it is to be maintained, the shift lever position must be fixedly maintained at that shift position. [0003] SUMMARY OF THE INVENTION Accordingly the present invention, e Bei the continuously variable transmission mechanism for a continuously variable working speed with a shift lever, a lever holding for holding the shift lever to any speed change operation position provided with a brake, provided lever return member for returning the release time shift lever of the brake to the low speed side, strange
With a one-way clutch interposed between the speed lever and the brake,
The shift lever can be operated at high speed during rake operation.
At a rice transplanter, attach the shifting lever to the lever shaft and plant
An elevating operation arm that switches the elevating valve is attached to the lever shaft.
Fix the link shaft to change gears by switching the continuously variable transmission mechanism.
The lever shaft and the link shaft are connected via a sector gear.
The lifting / lowering operation arm and the sector gear with the same member.
The lever shaft is attached to the bearing fixed to the body frame.
And the linking shaft are rotatably supported.
It is to improve workability . [0005] Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an explanatory view of a continuously variable transmission unit, FIG. 2 is a side view of a riding rice transplanter, and FIG. 3 is a plan view of the same, and FIG.
Is a traveling vehicle on which an operator rides. The engine (2) is mounted on a body frame (3) serving as a center frame, and a paddy field traveling front wheel (5) is provided in front of a transmission case (4) via a front axle case (5). 6), and a rear axle case (7) is connected to a rear portion of the transmission case (4).
Support the paddy field running rear wheel (8). A spare seedling mounting table (10) is attached to both sides of the hood (9) covering the engine (2) and the like, and the transmission case (12) is mounted by a body cover (12) on which an operator rides via a footrest (11). 4) and the like, and a driver's seat (13) is attached above the vehicle body cover (12). A steering handle (14) is provided in front of the driver's seat (13) and at the rear of the hood (9).
Is provided. [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 hitch bracket (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and is provided via a lifting link mechanism (27) including a top link (25) and a lower link (26). A hitch bracket (24) is connected to the rear side of the traveling vehicle (1), and the link mechanism (2)
7) A lifting cylinder (28) for raising and lowering the planting part (15) is connected to the lower link (26), and the front and rear wheels (6) and (8) are driven and moved, and simultaneously reciprocated right and left. A seedling for one plant is taken out from the slidable seedling mounting table (16) by a planting claw (17), and the planting operation is continuously performed. [0007] In the figure, (29) is the main shift lever, (3)
0) is a planting work lever which is also a sub-transmission lever, (31)
Is a setting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, (34)
Is a center float for two-row equalization, (35) is a side float for two-row equalization, and (36) is a side-row fertilizer for six rows. Further, as shown in FIGS. 4 to 6, a gantry (37) is integrally fixed on the upper surface of the front part of the vehicle body frame (3) to be inclined to the front low and rear high (the inclination angle is about 4 degrees). 37) On the upper surface where the front-rear direction is substantially horizontal,
8) The engine stand (39) is mounted via..., The engine (2) is mounted on the engine stand (39), a fuel tank (40) is provided on the left side of the engine (2), and the engine (2) is Attach the muffler (41) on the right side,
A battery (43) is mounted on the front end side of the body frame (3) via the front frame. Further, a case base (44) is integrally fixed to the body frame (3), a steering case (45) is attached to the case base (44), and inserted into a tubular body (46) serving as a handle column. Connect the steering shaft (14a) of the steering handle (14) to the left and right body frame (3).
(3) The output shaft (47) is protruded from the lower surface of the steering case (45) at the approximate center of the steering case (45), and the left and right front wheels (6), (6) are turned. The steering arm (48) is connected to the output shaft (4
7). A substantially horizontal cylindrical bearing body (49) is welded and fixed to the lower side of the engine stand (39) below the engine (2), and a countershaft (49) is attached to the bearing body (49). The counter pulley (5) is provided at the front end of the counter shaft (50) for inserting and supporting the bearing body (49) forward.
An alternator (52) is disposed facing the engine (2) in front of the engine (2). An output shaft (53) is provided substantially in the upper center between the left and right body frames (3) and (3) and in front of the engine (2). And an output pulley (54) is attached to the output shaft (53). The output pulley (54) is connected to the counter pulley (51) via V-belts (55) and (55). The output pulley (54) is connected to the input pulley (52) via a V-belt. Further, a rear axle case (7) is bolted and fixed to the rear end of the vehicle body frame (3), and a transmission case (4) rear surface is connected and fixed to a front surface of the rear axle case (7). ), A clutch case (58) is integrally formed on the right front surface of the clutch case (58), and a transmission belt (59), which is also a transmission case, is fixed to the right rear surface on the front surface of the clutch case (58). ) To operate the hydraulic pump (60) and the belt shift case (59).
The case (4) (58) (59) and the hydraulic pump (60) are fixed at a lower position than the upper surface between the left and right body frames (3) (3) in the form of a square pipe. And a transmission shaft (61) with a universal joint is provided between the rear end of the counter shaft (50) and the belt transmission case (59) to transmit the engine (2) output to the belt transmission case (59). A front wheel transmission shaft (62) is provided between the front axle case (5) and the transmission case (4), and the transmission output of the transmission case (4) is transmitted via the axle cases (5) and (7) to the front and rear wheels (6) ( 8). In addition, an input / output pulley (63) (64) and a speed change belt (65) for changing the speed ratio steplessly by changing the winding diameter are provided inside a belt speed change case (59).
The input shaft (66) of the belt transmission case (59) connected to the transmission shaft (61) with the universal joint is connected to the output shaft (67) via the belt (65), and the input / output pulleys (63) (64) ), The input / output cams (68) and (69) for changing the belt winding diameter
0), and a speed change arm (71) is provided at the front end of a speed change shaft (70) projecting from the front surface of the belt speed change case (59). In addition, P which transmits a driving force to the planting portion (15)
The TO shaft (72) is provided on the gear shift case (4), and the gear shift inside the gear shift case (4) is switched by operating the main shift lever (29), and the output shaft (67) is switched.
The driving force after the continuously variable transmission, which is input to the gear transmission case (4), is transmitted through gears to each shaft (62) (72). Further, as shown in FIGS. 1, 7 and 8, the planting work lever (30) moves up and down the planting section (15), and turns on and off the planting clutch (not shown). The work lever (30) is mounted on a lever shaft (73), and the lifting operation arm (75) for switching a planting lifting valve (74) is connected to the lever shaft. (73), and a link shaft (77) for shifting the speed by switching the belt continuously variable transmission mechanism (76) in the belt transmission case (59) is provided, and a pair of sector gears (78) and (79) are provided. The lever shaft (73) and the link shaft (77) are interlockingly connected via the lever. The lifting operation arm (75) and the sector gear (78) are integrally formed by the same member, and the lever shaft (73) and the link shaft (77) are mounted on a bearing (80) that is fixed to the vehicle body frame (3) by bolts. Is rotatably supported. A gas spring (8) which is a lever returning member for returning the working lever (30) to the lowest speed side.
1) is connected to the lever shaft (73) via an arm (82), and a potentiometer type shift position sensor (83) for detecting a shift operation position of the work lever (30).
And a potentiometer type operation control sensor (84) for detecting the on / off operation position of the planting clutch and the elevation operation position of the planting section (15). These sensors (83) (8)
4) Connect the sensor arm (85) (86) to the link shaft (77).
And an operating arm (87) (88) of the lever shaft (73). Further, as shown in FIG. 9, a brake plate (90) is provided on the link shaft (77) via a one-way clutch (89), and a spring (91) is provided on the brake plate (90).
, A brake shoe (92) as a brake is always pressed, and the lever (30) is supported at the operating position against the gas spring (81) by the braking force of the brake plate (90). ) Is switched from the low speed to the high speed, the lever (30) can be moved to the high speed side without the braking force of the brake plate (90) being applied by the idling of the one-way clutch (89). . Further, the release lever (93) connected to the main clutch pedal (32) is connected to the brake shoe (9).
2) When the main clutch is disengaged by operating the main clutch pedal (32), the brake shoe (92)
Is released against the spring (91) to release the brake operation, and the sub-shift is returned from "high speed" to "low speed" by the action of the gas spring (81). A speed change link (95) (96) and a speed change rod (97) for swinging around a speed support shaft (94).
(98) and the shift operation arm (99) of the link shaft (77) to the shift arm (7) of the belt shift case (59).
1), the cam (68) (69) of the transmission shaft (70) is rotated by operating the work lever (30), and the winding diameter of the belt (65) of the input / output pulleys (63) (64) is changed. It is configured to perform a stepless speed change operation. As shown in FIG. 4, a U-shaped rope hook (100) is fixed on the left and right outer surfaces of the vehicle body frame (3) at the position of the front wheel (6). When loading and transporting a rice transplanting machine body covered with a foil disk on a transport vehicle such as a truck, the vehicle and the rope hook (100) are connected by a rope to fix the rice transplanting machine body. [0018] Obviously the present invention from the above examples according to the present invention is, e Bei the continuously variable transmission mechanism (76) for a continuously variable working speed with a shift lever (30), said shift lever (3
0) is held at an arbitrary shift operation position, and a lever return member (8) for returning the shift lever (30) to the low speed side when the brake (92) is released.
1) is provided , between the shift lever (30) and the brake (92).
And a one-way clutch (89)
2) Enables high-speed operation of the shift lever (30) during operation
In the rice transplanter provided, the shift lever (30) is connected to the lever shaft.
Attach to (73) and switch the planting elevating valve (74)
The lifting operation arm (75) is fixed to the lever shaft (73).
Link that changes the continuously variable transmission mechanism (76) to change the speed
A shaft (77) is provided, and through a sector gear (78) (79)
The lever shaft (73) and the link shaft (77) are connected, and
Lowering arm (75) and sector gear (78) are the same member
Bearing formed and fixed to the body frame (3)
(80) and the lever shaft (73) and the link shaft (77).
It is rotatably supported and can improve workability and operability . [0020]

[Brief description of the drawings] FIG. 1 is an explanatory view of a working lever unit. FIG. 2 is an overall side view of the riding rice transplanter. FIG. 3 is an overall plan view of the riding rice transplanter. FIG. 4 is a side view of the traveling vehicle. FIG. 5 is a plan view of the traveling vehicle. FIG. 6 is an explanatory diagram of a continuously variable transmission mechanism. FIG. 7 is an explanatory diagram of a working lever unit. FIG. 8 is an explanatory diagram of a sector gear unit. FIG. 9 is an explanatory diagram of a brake unit. [Explanation of symbols] (30) Working lever (shift lever) (76) Continuously variable transmission mechanism (78) (79) Sector gear (81) Gas spring (return member) (89) One-way clutch (92) Brake shoe (brake)

Claims (1)

(57) [Claims 1] e Bei the continuously variable transmission mechanism working speed with a shift lever (30) is continuously variable (76), said shift lever (30) of any speed change operation position And a brake (92) for holding the lever.
A lever return member (81) for returning the speed change lever (30) to the low speed side at the time of release is provided .
(92) A one-way clutch (89) is interposed between
High-speed operation of shift lever (30) when key (92) is activated
In a rice transplanter that allows for
Attach to the lever shaft (73) and attach the planting elevating valve (74)
The switching operation arm (75) is connected to the lever shaft (7).
3) Change the speed by changing the continuously variable transmission mechanism (76).
A linkage shaft (77) is provided for performing sector gears (78) and (7).
9), the lever shaft (73) and the link shaft (77) are linked.
The lifting operation arm (75) and the sector gear (78)
Formed of the same member and fixed to the body frame (3)
The lever shaft (73) and the link shaft to the bearing (80) to be
A rice transplanter characterized by rotatably supporting (77) .