JPH0727187A - Rice transplanter traveling transmission - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the speed ratio of road traveling speed to planting and reverse traveling speed in rice transplanters. [Configuration] Input shaft (63) of mission case (4)
In the rice transplanter in which the traveling drive force input to the vehicle is transmitted to the traveling output shaft (71) through the traveling speed change shaft (68), a low speed and a reverse drive are provided between the traveling speed change shaft (68) and the output shaft (71). The reduction gears (69) (70) for traveling are provided, and the speed increasing gears (66) (72) for high-speed traveling are provided between the traveling transmission shaft (68) and the output shaft (71).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling speed change device for a rice transplanter, which is equipped with a seedling stand and a planting claw for continuously performing seedling planting work.

[0002]

2. Description of the Related Art In a gear shift structure in which a traveling drive force input to an input shaft of a transmission case of this kind is transmitted to a traveling output shaft via a traveling speed change shaft, a reverse drive is usually provided between the input shaft and the speed change shaft. R), first forward speed (F1) planting speed, and second forward speed (F2) road high speed are performed in three stages, and the output after these shifts is travel output through a common reduction gear. It is transmitted to the shaft and the variable speed running is performed.

[0003]

However, when gear shifting is performed only between the input shaft and the gear shifting shaft, the planting speed of the first speed (F1) and the high road speed of the second speed (F2) are high. There was a drawback in that the speed ratio difference between and could not be taken sufficiently, and work efficiency was poor at high speed running on the road. In particular, in the case where the auxiliary shift for planting is provided and the auxiliary shift operation is performed at a higher planting speed than the planting speed of the first speed (F1), the high speed on the road of the second speed (F2) is the speed. There was a problem that the ratio difference almost disappeared.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a rice transplanter in which the traveling drive force input to the input shaft of the mission case is transmitted to the traveling output shaft via the traveling transmission shaft, the traveling transmission shaft is provided. A reduction gear for low speed and reverse travel is provided between the output shaft and the output shaft, and an increase gear for high speed travel is provided between the travel transmission shaft and the output shaft. While transmitting to the traveling output shaft through the reduction gear, the high-speed traveling output is transmitted to the traveling output shaft through the speed increasing gear that supports the speed change shaft and the output speed increasing gear of the output shaft without passing through the reduction gear. By increasing the speed ratio of the high speed to the low speed which is also the planting speed and the reverse running speed, the efficiency is improved when running on the road.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional explanatory view of a mission case, FIG. 2 is a side view of a passenger 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, in the figure, (15) is a planting section which is an agricultural working apparatus equipped with a seedling placing table (16) for 6-row planting and a plurality of planting claws (17). The forward tilting seedling table (16) made of synthetic resin is supported on the planting case (20) via the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at a constant speed in one direction. A rotary case (21) to be rotated is supported by the planted case (20), and a pair of claw cases (22) and (22) are arranged symmetrically with respect to the rotation axis of the case (21). The planting claws (17) (17) are attached to the tips of the claw cases (22) (22). A support 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. The hitch bracket (24) is connected to the rear side of the traveling vehicle (1), and the lifting cylinder (28) for moving the planting part (15) up and down is connected to the lower link (26) via the link mechanism (27). , The front and rear wheels (6) and (8) are driven to move, and at the same time, the seedlings for one plant are taken out by the planting claws (17) from the seedling mounting table (16) that slides back and forth to the left and right, and continuously. Configure to perform seedling planting work.

Further, in the figure, (29) is a main transmission lever, and (3
(0) is a sub-shift lever for planting up / down and work traveling gear shifting, (3
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, and (3)
4) is a center float for leveling two lines, (35) is a side float for leveling two lines, and (36) is a side fertilizer applicator.

Further, as shown in FIGS. 4 to 5, the engine (2) is placed on the pair of left and right body frames (3) and (3), and the steering shaft (3) of the steering handle (14) is mounted.
7) is erected on the upper surface of the deceleration case (38), the rear side of the vehicle body frame (3) is fixed to the front side of the deceleration case (38), and is provided on the lower surface of the steering case (39) below the deceleration case (38). L-shaped steering arm (4
0) is connected to the knuckle arm (41) of the front wheel (6) via the steering rod (42), while the hydraulic steering cylinder (43) is connected to the L-shaped other end of the steering arm (40). It is configured to control the steering of the airframe by connecting to the.

The front ends of the pair of left and right main frames (44) and (44) are fixed to both sides of the rear parts of the cases (38) and (39), and the rear ends of the steering cases (39) are substantially parallel to the main frame (44) in a side view. Subframe (4
5) The front end is fixed, the rear end of each frame (44) (45) is fixed to the bracket (46) of the rear axle case (7), and the mission case (4) at the front of the case (7) is fixed to the main frame. Bracket (47) for (44)
And a gate-shaped support column (48) provided with the links (25) and (26) is erected on the rear portion of the main frame (44).
A pair of left and right upper frames (49) and (49) are obliquely provided between the front portion of the frame (44) and the support columns (48), and a lifting cylinder (28) is attached to an intermediate portion of the upper frame (49).

Furthermore, the input / output pulleys (50) (5
1) and a belt continuously variable transmission mechanism (53) having a belt (52), and an input shaft (55) of a speed reduction case (38) is provided at the output shaft (54) of the engine (2). ), The transmission case (4) is connected to the deceleration case (38) via the transmission shaft (56), and the front axle is connected to the transmission case (4) via the front drive shaft (57). The case (5) is connected, and the planting case (20) is connected to the mission case (4) through the planting drive shaft (58). The continuously variable transmission mechanism (53) and the deceleration case (38) 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.

Reference numeral (59) is the continuously variable transmission mechanism (53).
Is a motor-operated shift cylinder for shifting gears via a shift link mechanism (60).

As shown in FIGS. 1 and 6 to 8, the mission case (4) has a transmission shaft (61) and a shaft coupling (6).
2) a transmission input shaft (63) connected and connected in a butt shape, and a pair of a first speed (F1) and a second speed (F2) fixed gears (64) (65) of the input shaft (63). Second
The traveling speed-change shaft (6) that meshes the speed (F2) switching gear (66) and the first speed (F1) / reverse (R) switching gear (67).
8) and a pair of reduction gears (69) on the transmission shaft (68)
A traveling output shaft (71) that is interlocked via (70) and transmits output to the rear axle case (7) and the front traveling drive shaft (57), and the switching gear fixed to the output shaft (71). A second speed (F2) speed increasing gear (7) that meshes with a second speed (F2) switching gear (66) that is idly supported by (67).
2) and high-speed / medium-speed / low-speed gears (73) (74) (75) for shifting between main stocks fixed to the input shaft (63), and an idle gear (76) for high-speed reverse running (R) And the inter-stock transmission shaft (78) that meshes the medium-speed / low-speed switching gear (77) with the pin gear hole (79) of the idle gear (76) provided integrally with the switching gear (77). A pair of high-speed / low-speed switching gears (83) (84) for a high-speed clutch pin (80) and a high-speed / low-speed gear (81) (82) for shifting between stocks fixedly mounted on the speed-change shaft (78). A planting output shaft (85) that meshes with each other to transmit an output to the planting drive shaft (58), a planting clutch (86) interposed on the output shaft (85), and a traveling shifter shaft (87). Provided on the switching gear (66)
(67) Switching operation for shifter fork (8)
8), a main stock shifter fork (90) provided on a slidable main stock shifter shaft (89) to switch the switching gear (77), and a slidable sub stock shifter shaft (91). ) Is provided with the shift gears (83) (84) for switching the inter-substock shifter fork (92), and the planting clutch pin (93) for turning on and off the planting clutch (86). The shifter fork (88) is operated by the main shift lever (29) to move backward (R) / first
Change the speed (F1) / second speed (F2), and
3) Operate each shifter fork (90) (92) by the main / sub-stock shift levers (94) (95) provided on the rising surface of the lower body cover (12), and between the low / middle / high speed three-stage main stock It is configured to perform gear shifting and low / high speed two-tier stock shifting.

Further, the shifter shafts (89) (91) are
The notch (96) on the rear end side is engaged with the detent ball (97) embedded in the mission case (4), and the shifter shaft (89) (91) is slidably operated by the operation arm (98) on the front end side. ) Is intended to be fixed at each shift position. As shown in FIG. 6, the primary and secondary shifter shafts (89)
(91) are arranged in parallel at the same height position of the mission case (4) so that the stroke lengths of the primary and secondary operation arms (98) are the same, and the same primary and secondary operation arms (98) can be used. I am configuring.

Furthermore, the planted clutch pin (93) of the planted clutch (86) is arranged on the upper surface of the transmission case (4) so as to be slidable up and down, and oil leakage when the clutch pin (93) is pulled out. In addition to preventing the inconvenience that muddy water from the paddy field directly hits the clutch pin (93), it is an intermediate part of the auxiliary speed change lever (30) (also used as the operating lever of the planted clutch) that is rockable in the front-back direction. It is configured to be easily connected without changing the direction by a link or the like.

This embodiment is constructed as described above, and the main transmission lever (29) is used for the transmission shaft (68).
When the switching gear (67) that is spline-fitted to the slide gear is engaged with the idle gear (76) of the inter-stock transmission shaft (78),
Reverse (R), fixed gear (64) of input shaft (63)
When the gear is engaged with the first gear (F1), the switching gear (66) which is idly supported by the switching gear (67) is fixed between the fixed gear (65) of the input shaft (63) and the output shaft (71). It is switched to the second speed (F2) when meshing with the speed increasing gear (72), and the rotation transmitted to the speed change shaft (68) is in the reverse (R) and first speed (F1) shift states. The reduction gears (69) (70) reduce the speed to a low speed, and the output shaft (7
1), while in the second speed (F2) speed change state, the reduction gears (69) and (70) do not reduce the speed, and the rotation of the input shaft (63) sequentially decreases the gear diameter. Each gear (65) (66) (72) (gear diameter (65)> (6
6)> (72)) and is transmitted to the output shaft (71) while accelerating (between the input shaft (63) and the speed change shaft (68) in the case of first speed (F1) / reverse (R)) But it will slow down.) As a result, the speed ratio between the traveling speed of the reverse (R) and the first speed (F1) and the traveling speed of the second speed (F2) can be made extremely large, and the first speed (F1)
Even if the planting speed is further increased by the sub-transmission operation of the continuously variable transmission mechanism (53), the speed ratio between the planting high speed and the second speed (F2) can be made large, so that the vehicle can be driven on the road. Work efficiency can be improved.

[0016]

As is apparent from the above embodiments, according to the present invention, the traveling driving force input to the input shaft (63) of the mission case (4) is transmitted through the traveling speed change shaft (68) to the traveling output shaft (71). In the rice transplanter adapted to transmit to the power transmission, the reduction gears (69) (70) for low speed and reverse traveling are provided between the traveling speed change shaft (68) and the output shaft (71), and the speed increasing gear for high speed traveling is provided. (66) (72) to the traveling speed change shaft (6
8) and the output shaft (71), the low speed and reverse running outputs of the traveling speed change shaft (68) are used for the constant gear reduction gear (6).
9) A speed increasing gear (9) that transmits the high speed running output to the traveling output shaft (71) via (70) and is supported by, for example, the speed change shaft (68) in an idle manner without passing through the reduction gears (69) (70). 66) and the speed increasing gear (72) of the output shaft (71) to transmit to the traveling output shaft (71) to make the speed ratio of the high speed higher than the low speed which is also the planting speed and the reverse traveling speed,
It has a remarkable effect that it can improve the efficiency when driving on the road.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a mission case.

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

FIG. 3 is an overall 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 cross-sectional view of a mission case.

FIG. 7 is a partial cross-sectional explanatory view of a mission case.

FIG. 8 is an explanatory diagram of a speed increasing gear unit.

[Explanation of symbols]

 (4) Mission case (63) Input shaft (66) Speed increasing gear (69) Reduction gear (70) Reduction gear (71) Output shaft (72) Speed increasing gear

Claims (1)

[Claims] 1. A rice transplanter in which a traveling drive force input to an input shaft of a mission case is transmitted to a traveling output shaft via a traveling transmission shaft, for low speed and reverse traveling between the traveling transmission shaft and the output shaft. And a speed increasing gear for high-speed traveling are provided between the traveling speed change shaft and the output shaft.