JPH0717285A - Mobile agricultural machinery - Google Patents

Abstract

(57) [Summary] [Purpose] To stabilize and ensure the operation lever of the continuously variable transmission mechanism that continuously changes the traveling speed. [Structure] A continuously variable transmission mechanism for continuously changing the traveling speed (6
(0) is provided with a shift operation lever (30), and a lever return member (1) that normally returns the lever (30) to the low speed side.
22), the operation lever (3
A lever fixing device (113) for restricting the movement of (0) is provided above the main frame (47) of the machine body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine, such as a rice transplanter, which is equipped with a seedling mount and a planting claw for continuous seeding work.

[0002]

2. Description of the Related Art For example, in a rice transplanter equipped with a continuously variable transmission mechanism for continuously changing the planting speed, in the means for operating the continuously variable transmission mechanism with an electric cylinder, the shift position of an operating lever is used. Is detected by a potentiometer, and the electric cylinder is servo-controlled based on the detected value to change the speed.

[0003]

In such means for detecting the gear shift position of the operating lever with the potentiometer, in order to keep the position of the operating lever at a predetermined gear shift position, a separate lever fixing device is required. Since this type of fixing device is required, since it is usually provided at a lower position than the operation lever, there is a problem that muddy water and mud are likely to be caught on the fixing device, and it is difficult to maintain stable performance.

[0004]

SUMMARY OF THE INVENTION However, according to the present invention, a shift operation lever for a continuously variable transmission mechanism that continuously changes the traveling speed is provided, and a lever return member that normally returns the lever to the low speed side is provided. In a mobile agricultural machine, a lever fixing device that restricts the movement of the operation lever is provided above the main frame of the machine body. For example, a lever arm plate integrally connected to the operation lever is crimped and fixed between a pair of left and right brake plates. The lever fixing device prevents muddy water or mud from being applied from a field scene, and stably holds the performance of the fixing device.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side view of a planting operation lever portion, FIG. 2 is a side view of a riding rice transplanter, and FIG. 3 is a plan view of the same.
Is a traveling vehicle on which an operator rides. The engine (2) is mounted on the body frame (3), and the mission case (4)
A front wheel (6) for traveling paddy fields is supported forward through a front axle case (5), and a rear axle case (7) is connected to a rear portion of the mission case (4),
Rear wheels (8) for paddy field traveling on the rear axle case (7)
Support. The spare seedling mounts (10) are attached to both sides of the hood (9) that covers the engine (2) and the like, and the mission case (4) is provided by the vehicle body cover (12) on which an operator rides through the step (11). Etc., a driver's seat (13) is attached to the upper portion of the vehicle body cover (12), and a steering handle (14) is provided in front of the driver's seat (13) at the rear of the hood (9).

Further, (15) in the figure is a planting section equipped with a seedling table (16) for planting 6 rows, a plurality of planting claws (17), etc. Forward tilting seedling stand (1
6) is supported on the planting case (20) through the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at the same time, the rotary case (21) is rotated at a constant speed in one direction. The pair of claw cases (22) and (22) are supported at the case (20), and a pair of claw cases (22) and (22) are arranged symmetrically around the rotation axis of the case (21).
(22) Attach the planting claws (17) (17) to the tip. Further, a support frame (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a lifting link mechanism (27) including a top link (25) and a lower link (26) is provided. An elevating cylinder (28) for connecting a support frame (24) to the rear side of the traveling vehicle (1) and elevating the planting part (15) through the link mechanism (27).
Is connected to the lower link (26), and the front and rear wheels (6) are connected.
(8) is driven to move, and at the same time, the seedlings for one plant are planted from the seedling table (16) that slides back and forth to the left and right.
It is taken out according to 7) and the seedlings are planted continuously.

Further, in the figure, (29) is a main transmission lever, and (3
Reference numeral 0) is an operating lever, which is an auxiliary shift lever for planting up / down and work traveling gear shifting, (31) is a planting sensitivity adjusting lever, and (32)
Is the main clutch pedal, (33) and (33) are the left and right brake pedals, (34) is the center float for two-way leveling,
(35) is a side float for two-row leveling, and (36) is a side-row fertilizer applicator.

Further, as shown in FIGS. 4 to 8, the engine (2) is mounted on the pair of left and right body frames (3) and (3) through the engine base (37) and the vibration isolating rubber (38). Then, the middle of the seedling stand frame (39) for attaching the preliminary seedling stand (10) to both sides is welded and fixed to the upper surface of the body frame (3), and the steering shaft (40) of the steering handle (14) is decelerated. (41) It is arranged to stand upright on the upper surface, and the rear side of the vehicle body frame (3) is fixed by bolts to the front side of the reduction gear case (41). The steering case (42) is integrally fixed to the lower side of the reduction gear case (41), One end of a steering arm (43) having an L shape in plan view provided on the lower surface of the steering case (42) is connected to a knuckle arm (44) of the front wheel (6) via a steering rod (45), while hydraulically steering. Shirin (46) to be linked to the L-shaped other end of the steering arm (43), and configured to perform steering control of the aircraft.

Further, a pair of left and right main frames (47) and (47) front end brackets (47a) and (47a) are bolted and fixed to both sides of the rear portions of the cases (41) and (42) to fix the legs of the vehicle body cover (12). The cover frames (48) and (49) supporting the treads are welded and fixed to the front upper surface of the main frame (47), and the steering case (42) is also attached.
The front ends of the pair of left and right subframes (50) are fixed by bolts on both sides of the rear part, and the mainframe (47) and the subframe (50) are extended substantially parallel to each other in a side view. The front axle case (5) is swingably attached to the body (51) and the rear portion of the steering case (42), and both sides of the axle case (5) are protruded to the left and right from between the frames (47) and (50) so that the left and right front wheels are provided. (6) (6) is installed.

The rear end of each frame (47) (50) is attached to the bracket (52) of the rear axle case (7).
The mission case (4) at the front of the case (7) is fixed to the bracket (53) of the main frame (47) between the frames (47) and (50) on the front side of the mission case (4). Step frame (5
4) and the other end of the frame (54) is connected to the cover frame (49), and each link (25)
A gate-shaped support post (55) provided with (26) is erected on the rear part of the main frame (47), and a pair of left and right upper frames (56) (5) are provided between the front part of the main frame (47) and the support post (55).
6) is obliquely installed, and the lifting cylinder (28) is attached to the middle part of the upper frame (56).

Furthermore, the input / output pulleys (57) (5
8) and a belt continuously variable transmission mechanism (60) having a belt (59), wherein the output shaft (61) of the engine (2) is provided with the input shaft (62) of the speed reduction case (41). ), The transmission case (41) is connected to the deceleration case (41) via the output shaft (63), and the front axle is connected to the transmission case (4) via the front drive shaft (64). The case (5) is connected, and the planting case (20) is connected to the mission case (4) through the planting drive shaft (65). The continuously variable transmission mechanism (60) and the deceleration case (41) are connected to each other. The output of the engine (2) is decelerated and transmitted to the mission case (4) via the multi-stage shift output by the main shift lever (29) of the mission case (4) to the front and rear wheels (6) and (8) of each axle case (5). ) ( ) Is configured to transmit via the.

A tension roller (66) for tensioning the belt (59) and pulleys (57) (58).
A connecting rod (67) interlockingly connected to the input / output cams (67a) (67b) for changing the winding diameter of the belt (59) of
The main frame (47) is provided with a speed change link (69) for rotatably supporting the shaft via a shaft (68).
One end of 9) and the connecting rod (67) are connected by a speed change rod (70), while the other end of the link (69) is a telescopic output shaft (72) which is a piston of an electric speed change cylinder (71) which is a servo mechanism. And the cylinder (71) is attached to the bracket (73) of the main frame (47), and the input / output pulleys (57) (58) are connected through the link (69) or the like by the expansion and contraction control of the cylinder (71). ) The winding diameter (effective diameter) of the belt (59) is changed by changing the width, and the gear ratios of the pulleys (57) (58) and the belt (59) are continuously changed.

Further, a front guard frame (7) having a U-shape in front view, which supports the front step portion of the vehicle body cover (12), is provided.
4) and the front bumper (75) connect the front parts of the left and right vehicle body frames (3) and (3), and the seedling frame (3)
9) and the guard frame (74) between the vehicle body cover (12)
A battery (76) is provided on the lower right side of the front step portion via a cradle (76a).

Furthermore, an air cooling fan (78) is attached to the right side of the engine (2) via a crankshaft (77),
Cooling air is supplied to the engine (2) by the fan (78), and a hydraulic pump (79) for each cylinder (28) (46) is arranged outside the right rear part of the engine base (37).
The crankshaft (77) is operatively connected to each other via the pulleys (80) (81) and the belt (82) to drive the hydraulic pump (79).

Further, the input / output pulleys (57) (58)
Is a fixed pulley (57a) (58a) and each shaft (61)
Movable pulley (57b) sliding in the axial direction of (62)
The cams (83) and (84) for connecting (58b) and the movable pulleys (57b) and (58b) connected to the connecting rod (67) so as to freely rotate, and the cams (83) and (84). And a fixed roller (85) (86) for input / output to be brought into contact with, and a mounting plate (87) provided with the output roller (85) is fixed to the side surface of the engine (2), and the input roller (86) is fixed. Attach the mounting plate (88) to the body frame (3)
It is fixed to a bracket (89) that is supported by the input / output cam (83) via the link (69) rod (70) and connecting rod (67) by the expansion and contraction control of the cylinder (71).
When the (84) is rotated around the axis of each shaft (61) (62), the movable pulley (57b) (integrated with the cams (83) (84) is integrated by the cam action of the cams (83) (84). 5
8b) slide in the axial direction of each shaft (61) (62),
The winding diameter (effective diameter) of the belt (59) of these pulleys (57) and (58) is forcibly changed by contacting and separating from the fixed pulleys (57a) and (58a).

Reference numeral (90) is a main clutch provided in a clutch case (91) integrally connected to the pulley (58a).

As shown in FIG. 9, the body cover (1
2) An elevator / gear shift cylinder (28) (71) and an electrical unit (92) equipped with a controller, a relay box, a switch, etc. for controlling the operation of the elevator and shift cylinders (28) (71) are provided in the rear driver's seat mounting part (12a). , A pair of left and right upper frames (56) (56) are provided with an elevating cylinder (28) via a rotary pivot shaft (93), and an electrical unit (92) via a mounting plate (94). An inspection hole (95) is provided in a substantially lower position of the driver's seat (13a) of the mounting portion (12a) to allow attachment / detachment of electrical components and operation of switches, and concentrate various electrical components on the electrical unit (92). It is arranged to facilitate wiring.

Further, the gear shift is performed through a left-right lateral pivoting bolt shaft (96) to a raised bracket (73) on the left main frame (47) at the lower front left of the lifting cylinder (28). The cylinder (71) is mounted so as to be swingable up and down, and an R-shaped meter mounting base (97) is fixedly installed on the left side surface of the left main frame (47) substantially directly below the speed change cylinder (71). A cylinder control feedback potentiometer (98), which is a detection number, is provided on the outer surface of the base (97), and the tip of the detection arm (99) of the meter (98) facing the inner surface of the mounting base (97) and the speed change rod ( 70) and the vicinity of the link (69) side are linked (10
0), and the amount of expansion and contraction of the speed change cylinder (71) is detected by the meter (98).

As shown in FIGS. 1 and 10 to 12, the speed change cylinder (71) is operated between the "low speed" and "high speed" positions of the auxiliary speed change lever (30). The lift arm (102) provided on the lever shaft (101) is attached to the lever guide (103) of the lever (30).
Between the raising and lowering positions of "lowering" and "raising", the spool (105) of the planted lifting hydraulic valve (104) is lifted and lowered, while the fan plate-shaped one provided on the lever shaft (101). The operating shaft (107) of the arm plate (106) is moved between the "low speed" and "high speed" gear shift positions (L) of the lever (30).
Then, the potentiometer (1) for detecting the shift operation position of the bracket (108) fixedly mounted on the right main frame (47).
09) is brought into contact with the detection arm (110), and the shift operation position of the lever (30) is adjusted to the potentiometer (109).
The speed change cylinder (71) is controlled based on the detected value to shift the planted traveling speed.

Further, between the shift positions (L) of the lever (30), the lever fixing device (113) for fixing the arm plate (105) by sandwiching the arm plate (105) with the pair of left and right brake plates (111) (112) is fixed to the bracket. The left brake plate (111) is fixed to the bracket (108), and the right brake plate (112) includes the guide shaft (114), the spring seat (115), and the compression spring (116). Via the bracket (108) via the
The left brake plate (11
The right brake plate (112) is crimped to the 1) side.

Further, the spring (1) of the spring seat (115) is
16) On the side opposite to the sliding contact surface, the right main frame (10
7) A roller (119) on one end side of a swing cam plate (118) which pivotally supports the middle of the wire (120) on the other end side of the cam (118) is brought into contact with the wire (120).
Is linked to the main clutch pedal (32), and when the wire (120) is pulled by stepping on the pedal (32), the cam (118) holds the spring seat (115) against the spring (116) and the bracket. Move it to the (108) side,
The right brake plate (112) integrally connected to the spring seat (115) via the guide shaft (114) is connected to the left brake plate (11).
1) to separate them from the brake plates (111) (1
It is configured to release the fixing of 12).

Furthermore, a gas spring (122) which is a lever return member is connected to the lever shaft (101) through a fixed arm (121), and a shift lever (30) between shift positions (L). The lower lever (123) for supporting the base end of the speed change lever (30) on the lever shaft (101), while being provided to normally return to the low speed side by the spring force.
And an upper lever (124) made of a round pipe having an operation grip portion (124a) at its tip.

The lower lever (123) has a base lateral boss (1
25) is detachably fixed via a bolt (127) to a U-shaped pivoting plate (126) attached to the end of the lever shaft (101), and a cylindrical shaft (fixed in parallel) is provided outside the other end of the upper lever (124). 128) the lower lever (123) upper end engaging shaft (123
Insert into a), upper lever (124) and cylinder shaft (128)
The pivot plate (129) fixed to the lower lever (123) and the pivot plate (130) fixed to the lower lever (123) are fixed in an overlapping manner by the knob bolts (131), and left and right when the upper lever (124) is attached. -It is configured to ensure reproducibility of positioning in the front-back, height, and rotation directions.

Further, the grip portion (1) of the upper lever (124)
24a) is provided with a button switch (132) for unlocking a side marker, and is provided in a wiring passageway (134) of a harness (133) connecting the pipe inner diameter side of the lever (124) to the switch (132). , The lower end of the upper lever (124), which is the connection side, is connected to the harness outlet (13
4a), the switch (132) provided on the upper lever (124) is configured to prevent the harness (133) from being damaged.

As shown in FIGS. 6 and 13 to 14, the left end of the battery (76) is mounted on the seedling stand (76a) fixed between the seedling stand frame (39) and the guard frame (74). , The right outside of the battery (76) to the right cover (13
5) openably and closably covers the front and rear fixing arms (138) of the right cover (135) via the rotation support shaft (137) to the front and rear protrusions (136) protruding below the seedling stand (76a). The front end bent edge of the right cover (135) is openably fixed to the locking plate (139) fixed to the frame (74) via the knob bolt (140) while being pivotally supported rotatably. It is configured so that the battery (76) can be freely taken in and out.

Further, the right cover (135) is formed at substantially the same height as the low level (Lo) height of the battery (76) to facilitate the level check of the battery liquid and to open the right cover (135). The stopper (141) fixed to the fixed arm (138) is brought into contact with the bottom surface of the pedestal (76a) to keep the inner surface of the right cover (135) substantially horizontal, and the inner surface of the battery (76) is kept. It is configured to be used as a table.

Reference numeral (142) is a speed increasing pedal for switching the traveling speed to high speed, and reference numerals (143) and (144) are main and sub stock shift levers.

This embodiment is constructed as described above, and when the main clutch pedal (32) is depressed (main clutch is disengaged), the left and right brake plates (111) (1)
The brake of the arm plate (106) is released by 12) so that the shift operation between the shift positions (L) of the auxiliary shift lever (30) can be freely performed without any trouble, while the main clutch is appropriately engaged at the shift position. When the vehicle is brought into the traveling state, the arm plate (106) is fixed to the left and right brake plates (111) and (112), and the auxiliary transmission lever (30) is fixedly held at the shift operation position for safe traveling. To do.

Thus, in the case of this construction, the fixing device (113) having these brake plates (111) (112) is
The right main frame (47) is arranged inside and substantially above the width of the right main frame (47) to prevent inconvenience that muddy water, mud, or the like may get on the fixing device (113) from the lower field scene, so that the fixing function can be maintained for a long time. It is to be stably maintained over the entire range.

Although the cam plate (118) for operating the brake plate (112) is interlockingly connected to the main clutch pedal (32), it is interlockingly connected to other operating members such as the brake pedal (33). It may be configured.

[0031]

As is apparent from the embodiments described above, the present invention is provided with the speed change operation lever (30) of the continuously variable transmission mechanism (60) for continuously changing the traveling speed, and the lever (3) is provided.
In a mobile agricultural machine provided with a lever return member (122) that normally returns 0) to the low speed side, a lever fixing device (113) for restricting the movement of the operation lever (30) is installed above the main frame (47) of the machine body. Therefore, for example, a lever arm plate (106) integrally connected to the operation lever (30) has a pair of left and right brake plates (111) (11).
2) In the lever fixing device (113) for crimping and fixing between
It is possible to prevent inconveniences caused by muddy water or muddy soil from the field, to stably maintain the performance of the fixing device (113), and to make this stepless speed change operation reliable.

[Brief description of drawings]

FIG. 1 is a side view of an auxiliary shift lever portion.

FIG. 2 is a side view of a riding rice transplanter.

FIG. 3 is a plan view of a riding rice transplanter.

FIG. 4 is a side view of a traveling vehicle body.

FIG. 5 is a plan view of a traveling vehicle body.

FIG. 6 is an explanatory plan view of a deceleration case portion.

FIG. 7 is a side view of a belt continuously variable transmission mechanism.

FIG. 8 is a cross-sectional explanatory view of a belt continuously variable transmission mechanism.

FIG. 9 is a side view of a shift cylinder section.

FIG. 10 is an explanatory plan view of an auxiliary shift lever portion.

FIG. 11 is an explanatory plan view of a lever fixing device section.

FIG. 12 is a front explanatory view of a lever fixing device section.

FIG. 13 is a front explanatory view of a battery section.

FIG. 14 is a side view illustrating a battery section.

[Explanation of symbols]

 (30) Auxiliary shift lever (operation lever) (47) Main frame (60) Continuously variable transmission mechanism (113) Lever fixing device (122) Gas spring (return member)

Claims (1)

[Claims] 1. A mobile agricultural machine provided with a shift operation lever of a continuously variable transmission mechanism for continuously changing a traveling speed, and a lever return member for returning the lever to a low speed side at all times.
A mobile agricultural machine, wherein a lever fixing device for restricting movement of the operation lever is provided above a main frame of a machine body.