JP3426390B2 - Rice transplanter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type rice transplanter equipped with a seedling table and a planting claw for continuously carrying out seedling planting work.

[0002]

2. Description of the Related Art As such a continuously variable transmission mechanism for continuously changing the working speed, there is a belt continuously variable transmission mechanism having a fixed pulley and a movable pulley, which is operated by a gear shift operating portion and an operator. The operation levers are linked and linked by using a link system or the like.

[0003]

However, in the case of such a link system, when an accident occurs such that the link system is damaged or one part is lost, the operator controls the continuously variable transmission mechanism. Becomes impossible and becomes extremely dangerous.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the transmission case is provided with a continuously variable transmission mechanism for continuously changing the working speed.
Along with the operation plate provided on the speed change shaft of the speed change case,
Rice transplanter that connects the operating lever for shifting with an operating link system
In case of damage or loss of the operation link system,
A speed change case with a return mechanism that returns the speed change mechanism from high speed to low speed
And the return mechanism on the outer surface of the transmission case.
One which is connected to the operating plate, the improved safety of the continuously variable transmission mechanism and working link system between the operating lever and back to automatically lower speed be deleted damaged or powder, stepless eliminates the need to remove the back Shi mechanism at the time of maintenance of the mechanism, is intended to improve the maintainability.

Further, by using a returning member that operates with substantially the same returning force in the entire returning operation range from high speed to low speed in the low speed returning mechanism, the returning member is always returned from high speed to low speed with a substantially uniform working speed. As a result, the safety of the work is improved and the operability of the worker is improved.

[0006]

[0007]

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front explanatory view of a shift case portion, FIG. 2 is a side view of a passenger rice transplanter, and FIG. 3 is a plan view of the same, in which (1) is a traveling vehicle on which an operator rides, and an engine (2). Is mounted on the body frame (3) which is the center frame, and the front axle case (5) is placed in front of the mission case (4).
The front wheel (6) for traveling on paddy field is supported via the rear axle case (7) connected to the rear portion of the mission case (4), and the rear wheel (8) for traveling paddy field is mounted on the rear axle case (7). Support. On both sides of the bonnet (9) covering the engine (2), etc., a spare seedling stand (1
0) is mounted, the mission case (4) and the like are covered by a vehicle body cover (12) on which an operator rides via a footrest (11), and a driver's seat (13) is placed above the vehicle body cover (12). A steering handle (14) is provided at the rear of the hood (9) in front of the driver's seat (13).

Further, (15) in the figure is a planting section provided with a seedling table (16) for planting 6 rows and a plurality of planting claws (17), which are made of a synthetic resin having a high front and low front. Forward tilting seedling stand (1
6) is supported by the planting case (20) through the lower rail (18) and the guide rail (19) so as to be slidable left and right, and 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 hitch bracket (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a lift link mechanism (27) including a top link (25) and a lower link (26) is provided. A hitch bracket (24) is connected to the rear side of the traveling vehicle (1), and the link mechanism (2
A lifting cylinder (28) for lifting and lowering the planting part (15) through the lower part (7) is connected to the lower link (26) to drive and move the front and rear wheels (6) and (8), and at the same time reciprocate left and right. One seedling worth of seedlings is taken out from the sliding seedling placing table (16) by the planting claws (17), and the seedling planting operation is continuously performed.

Further, in the figure, (29) is a main transmission lever, (3
0) is a planted operation lever that is also a sub-shift lever, (31)
Is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, and (34)
Is a center float for two-row leveling, (35) is a side float for two-row leveling, and (36) is a side-row fertilizer applicator for six rows.

Further, as shown in FIGS. 4 to 8, the pedestal (37) is integrally fixed to the upper surface of the front portion of the body frame (3) to be tilted to the front low rear height (inclination angle of about 4 degrees), and the pedestal ( 37) ... The front and rear direction of the anti-vibration rubber (3
8) is attached to the engine base (39), the engine (2) is mounted on the engine base (39), the fuel tank (40) is mounted on the left side of the engine (2), and the engine (2) is mounted on the left side of the engine (2). While installing the muffler (41) on the right side,
A battery (43) is attached to the front end side of the vehicle body frame (3) via the front frame (42).

Furthermore, a case base (44) is integrally fixed to the vehicle body frame (3), a steering case (45) is attached to the case base (44), and the steering case (45) is inserted into a tubular body (46) which is a handle column. Attach the steering shaft (14a) of the steering handle (14) to the left and right body frames (3).
The steering case (45) is erected on the upper surface of the steering case (45) substantially at the center between (3) and the output shaft (47) is projected on the lower surface of the steering case (45) to turn the left and right front wheels (6) and (6). The steering arm (48) is connected to the output shaft (4
It is attached to 7).

A cylindrical bearing body (49) which is substantially horizontal in the front-rear direction is welded and fixed to the lower side of the engine base (39) below the engine (2), and the counter shaft (49) is fixed to the bearing body (49). 50) is inserted and supported, and the counter pulley (5) is attached to the front end of the counter shaft (50) that projects forward from the bearing body (49).
1) is mounted and an alternator (52) is arranged in front of the engine (2) so as to face the output shaft (53) in front of the engine (2) substantially above the center between the left and right body frames (3) and (3). And the output pulley (54) is attached to the output shaft (53), the output pulley (54) is connected to the counter pulley (51) via the V belts (55) (55), and the alternator is also provided. The output pulley (54) is connected to the input pulley (56) of (52) via the V belt (57).

Further, a rear axle case (7) is fixed to the rear end portion of the vehicle body frame (3) by bolts, and the rear surface of the mission case (4) is connected and fixed to the front surface of the rear axle case (7). ) Is integrally formed with a clutch case (58) on the right front side, and the right side rear surface of the continuously variable belt transmission case (59) which is also a transmission case is fitted and fixed (inlay) on the front side of the clutch case (58), and the lifting cylinder (28 ) Actuates the hydraulic pump (60) to the belt shifting case (59)
Is fixed to the left rear surface of the case, and is located at a position lower than the upper surface between the square pipe-shaped left and right body frames (3) and (3), and the cases (4) (58) (59) and the hydraulic pump (60). 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 output of the engine (2) to the belt transmission case (59). A front wheel transmission shaft (62) is provided between the front axle case (5) and the mission case (4), and the shift output of the mission case (4) is transmitted through the axle cases (5) and (7) to the front and rear wheels (6) ( It is configured to tell 8).

Furthermore, a lower link fulcrum shaft (63) is provided at the rear end of the body frame (3), and the fulcrum shaft (6
The front end of the lower link (26) is attached to 3), and the gate-shaped support pillar (64) is erected between the rear ends of the left and right body frames (3) and (3), and the fertilizer applicator base (64) is installed at the upper end of the support pillar (64). 65) is provided, and the front end of the top link (25) is attached to the base (65) via the top link fulcrum shaft (66).

Further, a pedal fulcrum pipe (67) provided with the brake pedal (33) is provided, and the pipe (67) is inserted into the left and right vehicle body frames (3) (3), and both ends of the pipe (67) are provided. Are welded and fixed to the vehicle body frame (3), the pipe (67) is attached as a connecting member of the left and right vehicle body frames (3) and (3), and the left and right subframes (68) (6) to which the lifting cylinder (28) is attached.
8), and a sub-frame (6
8) The front end is welded and fixed to the pedal fulcrum pipe (67), and the rear end of the subframe (68) is welded and fixed to the upper end of the column (64).

As shown in FIGS. 9 to 11, the input / output pulley (6) for continuously changing the gear ratio by changing the winding diameter.
9) (70) and the speed change belt (71) are installed in the belt speed change case (59), and the front end of the input shaft (72) of the belt speed change case (59) is connected to the counter via the universal joint transmission shaft (61). The multi-disc friction type dry clutch (73) is connected to the rear end of the shaft (50), the hydraulic pump (60) is directly connected to the rear end of the input shaft (72), and the clutch plate includes a multi-plate friction dry clutch (73). The output shaft (74) of the belt transmission case (59) is installed inside the (58) and the input shaft (7) of the transmission case (4) is installed.
5) is connected via the clutch (73).

Further, the tension roller (76), the input / output cams (77) and (78) for changing the belt winding diameter of the input and output pulleys (69) and (70), and each cam (77).
Input / output rollers (79) (80) to be brought into contact with (78)
And a gear shift arm (82) is provided in the belt gear shift case (59) via a gear shift shaft (81).

Further, the middle of the tension arm (83) is rotatably attached to the output shaft (74), and the arm (8)
3) A tension roller (76) is rotatably provided on one end side of the arm (8) via a shaft (84), and the arm (8
The other end of 3) is connected to one end of the tension spring (85). Further, the belt shift case (59) has a bearing shaft (8).
6) The receiving arm (8) is attached to one end side of the receiving shaft (86) that rotatably supports the middle portion and projects into the case (59).
7) The base end is integrally fixed, the end of the tension spring (85) is locked to the tip of the receiving arm (87), and the tension spring (85) is connected between the tension arm (83) and the receiving arm (87). . As shown in FIG. 12, the base end of the lock arm (88) is fixed to the other end of the receiving shaft (86) that projects outside the case (59), and the tip end of the lock arm (88) is fixed to the case (59). ) A bolt (89) is fixed to the outer surface, and the arms (87) and (88) are integrally fixed to the case (59) by the bolt (89), and the tension spring (85) is supported in a tensioned state. The roller (76) is brought into pressure contact with the speed change belt (71) to maintain the tension of the speed change belt (71) at a predetermined level or more.

Furthermore, the belt shift case (5
9) Front and rear case bodies (59a) (59)
The roller (79) (80) in the form of a bearing is rotatably provided in the middle of the support shaft (90) ... in the middle so that the front and rear case bodies (59a) (59b) can be moved toward and away from each other (combined separation). The opened bearing recesses (91) are formed on the inner surface of the case (59), one end side of the support shaft (90) is fitted into the bearing recess name (91), and the other end side of the support shaft (90) is located above. The stepless belt is configured such that the rollers (79) (80) are detachably attached to the inner surface of the case (59) by bolts (92) and fixed to the inner surface of the case (59) through the support shafts (90). The support shaft (90) is attached to the continuously variable belt transmission case (59) by a bearing recess (91) and one bolt (92) opened in the disassembly direction of the transmission case (59).
It can be detachably fixed to the stepless belt speed change case (5
9) and the bearing recess (91) can be easily formed, and
The support shaft (90) is fitted into the bearing recess (91) and the bolts (92) are tightened to the support shaft (90).

The link (93) and the rod (9)
4) and the input / output cams (77) (78) are connected to the speed change shaft (81) via the connecting rod (95) and the planting operation lever (30) is connected to the speed change arm (82). And the input / output shaft (72) is operated by operating the lever (30).
The input / output cams (77) (78) are rotated around (74) to change the width of the input / output pulleys (69) (70) to change the winding diameter of the speed change belt (71).
9) The gear ratios of (70) and the speed change belt (71) are continuously changed.

As shown in FIGS. 13 to 14, the planting operation lever (30) moves the planting part (15) up and down, the planting clutch (not shown) is turned on and off, and the planting traveling speed is changed. Shifting 3
The operation lever (30) is attached to the lever shaft (95), and the raising / lowering operation arm (98) for switching the planted raising / lowering valve (97) is attached to the lever shaft (96).
And a fixed shaft (9) for performing gear shifting by switching the belt continuously variable transmission mechanism in the gear shifting case (59).
9) is provided, and the lever shaft (96) and the linkage shaft (99) are interlockingly connected through a pair of sector gears (100) (101).

Further, a lever shift operating plate (102) is fixed to the link shaft (99), and a plate (103) having a pair of long slots is formed symmetrically with respect to the link shaft (99). Of the operation plate (1)
No. 02) is engaged with the accommodation slot, and the lever (3
0) from the "low speed" to the "high speed" side, the accommodation plate (103) is rotated by engagement with the pin,
The transmission operation shaft of a transmission case (59) connected to one end of the accommodation plate (103) through a transmission rod (104) is operated to change the planting traveling speed from a low speed to a high speed. There is.

Further, a speed increasing pedal (106) is interlockingly connected to the other end side of the flexible plate (103) via a wire (105), and the speed increasing pedal (106) is stepped on to perform an "ON" operation. When rotating (103) to the high speed side,
Only the accommodation plate (103) is rotated by the elongated hole regardless of the position of the lever (30) to switch the planting traveling speed from the low speed side to the high speed side. A gas spring (107) for returning the lever (30) is connected to the lever shaft (96) via an arm (108), and a potentiometer-type shift position sensor for detecting a shift position of a shift case (59). (109) is provided, and the link shaft (99) is connected to the sensor (109) via the sensor arm (110).

Further, as shown in FIG. 14, a brake plate (112) is provided on the linkage shaft (99) via a one-way clutch (111), and the brake plate (112) is connected via a spring (113). The brake shoe (114) is constantly crimped, the lever (30) is supported in the operating position against the gas spring (107) by the braking force of the brake plate (112), and the lever (30) is switched from low speed to high speed. At this time, the lever (30) can be moved to the high speed side without the braking force of the brake plate (112) acting due to the idling of the one-way clutch (111). Also, the main clutch pedal (32)
When the main clutch is disengaged by operating the main clutch pedal (32) by connecting the release lever (115) to the brake shoe (114), the brake shoe (114) is released against the spring (113). The brake operation is released to return the sub-shift from "high speed" to "low speed".

On the other hand, as shown in FIGS. 1 and 12, the speed change arm (82) includes a continuously variable speed change mechanism (11) composed of input / output pulleys (69) (70) and a speed change belt (71).
5) is provided with a low speed return mechanism (116) for returning from "high speed" to "low speed" separately from the lever (30) system, and it is free to rotate on the speed change shaft (81) in front of the speed change case (59). A gas spring (11) serving as a return member for returning to a low speed is provided between an arm operation plate (117) attached to the vehicle and a mounting stay (118) fixed to the front surface of the transmission case (59).
9), and the operation plate (117) and the speed change arm (82) fixedly attached to the speed change shaft (81) are connected to the pin (1).
20a) and the long hole (120b) so as to be interchangeable to the high speed side, and the arm (82) is connected to the operating plate (117) via the spring (121) so as to follow the transmission arm (82). Low-speed and high-speed stoppers (122) (123), which are brought into contact with the low-speed and high-speed positions to regulate their positions, are fixed to the front surface of the transmission case (59). When an accident such as damage or partial loss occurs in the operation system that connects the operation plate (117) and the lever (30), the restoring force of the gas spring (119) causes a continuous step regardless of the operation system. The speed change mechanism (115) is configured to return from the high speed side to the low speed side.

By the way, a wire mounting hole (125) for hooking a lifting wire (124), which serves as a lifting portion of a lifting device such as a winch / crane, is provided on the upper left and right sides of the rear case (59b) of the transmission case (59). A mounting case having a mounting boss (126) integrally formed with the rear case (59b) and a rear case (59b) having mounting bolt holes (127). The mounting boss (128) is integrally formed to fix the fixed mounting plate (12) of the vehicle body frame (3).
9), the both sides of the transmission case (59) are fixedly supported.

Further, as shown in FIG. 8, the hydraulic pump (6
Reference numeral 0) is for communicating with a rear axle case (7) also serving as a hydraulic tank via a hose (130) to feed hydraulic pressure to a lifting cylinder (28). The fixing member (131) of the hose (130) is attached to the front wheel. The transmission shaft (62) of the hose (130) is attached and fixed to the front surface of the mission case (4) below the transmission shaft (62) by a fixing member (131).
The transmission case (5) is prevented from interfering with the transmission case (59) and the pump (60) is left on the transmission case (4) side via the hose (130) when the transmission case (59) is removed.
9) It is configured so that it can be independently removed.

This embodiment is constructed as described above, and the low-speed return mechanism (116) is attached to the speed change case (59).
Due to the provision of the switch, an accident such as damage or loss occurs in the lever operation system between the operation lever (30) and the speed change shaft (81), and the continuously variable transmission mechanism (115) is operated by disengaging the main clutch pedal (32). ) Does not return from the high speed side to the low speed side, the continuously variable transmission mechanism (115) is returned by the returning action of the gas spring (119) of the returning mechanism (116).
It is possible to return from the high speed side to the low speed side to improve the safety. Further, by integrally mounting the return mechanism (116) on the front surface of the speed change case (59), even when the speed change case (59) is removed for maintenance or inspection, it is not necessary to remove the return mechanism (116) each time. The gas spring (119)
By applying a substantially uniform return force to the speed change shaft (81) in this entire operation range, a smooth deceleration operation without fluctuation from the high speed side to the low speed side is performed.

Further, the transmission case (59) can be lifted by a crane or the like by means of the lifting boss (126), and the clutch case (58) is fitted in the spigot.
Not only makes it easy to attach and detach with the gearbox (5
By removing 9), the front side of the clutch case (58) connected to the front side of the mission case (4) is also opened, and the shift case (59) is not lifted to the ground. It is possible to easily enable maintenance and inspection of the clutch (73) in the lifted state.

[0031]

As is clear from the above embodiments, the present invention provides a continuously variable transmission mechanism (115) for continuously changing the working speed.
The shift case (59) is provided with the shift case
An operation plate (117) provided on the transmission shaft (81) of (59);
Connecting the operation lever (30) for continuously variable transmission with the operation link system
In the rice transplanter, when the operation link system is damaged,
Will return the continuously variable transmission (115) from high speed to low speed when lost
The return mechanism (116) is integrated with the transmission case (59).
The return mechanism (1) is provided on the outer surface of the transmission case (59).
16) intended to be linked to the operation plate (117), continuously variable transmission mechanism (115) Toko of the operation lever (30) between the link system such as is returned automatically be deleted damaged or powder to the low speed side work Work
It is possible to contrive to enhance the safety of, eliminates the need to remove the skip back during maintenance of the continuously variable transmission mechanism (115) mechanism (116), in which it is possible to improve the maintainability.

Further, since the returning member (119) for operating with substantially the same returning force in the entire returning operation range from high speed to low speed is used for the low speed returning mechanism (116), the returning member (119) is always provided with substantially the same returning force and high speed. To about the same speed as the low speed,
The work safety can be improved and the operability of the worker can be improved.

[0033]

[0034]

[Brief description of drawings]

FIG. 1 is a front explanatory view of a shift case portion.

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 the traveling vehicle.

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

FIG. 6 is a front explanatory view of an engine section.

FIG. 7 is a side view of the engine section.

FIG. 8 is a side view illustrating a transmission case portion.

FIG. 9 is an explanatory plan view of a shift case portion.

FIG. 10 is an explanatory cross-sectional view of a shift case portion.

FIG. 11 is a rear view of the transmission case portion.

FIG. 12 is a side view of a transmission case portion.

FIG. 13 is an explanatory diagram of an operating lever system.

FIG. 14 is an explanatory diagram of an operation lever system.

[Explanation of symbols]

(59) Shift case (73) Clutch (115) Continuously variable transmission (116) Low speed return mechanism (119) Gas spring (return member) (124) Wire (lifting part) (126) Mounting boss

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01C 11/02

Claims (2)

(57) [Claims] 1. A continuously variable transmission mechanism (115) for continuously changing work speed is provided in a transmission case (59), and
Operation plate provided on the shift shaft (81) of the shift case (59)
Operate (117) and the operation lever (30) for continuously variable transmission.
In the rice transplanter to be connected by the link system, the operation link system
High-speed continuously variable transmission (115) in case of damage or loss
The return mechanism (116) for returning from the low speed to the low speed case (5
9) integrated with the outside of the transmission case (59) and front
A rice transplanter characterized in that the write- back mechanism (116) is connected to the operation plate (117) . 2. The rice transplanter according to claim 1, wherein a returning member (119) which operates with substantially the same returning force in the entire returning operation range from high speed to low speed is used for the low speed returning mechanism (116).