JPH11151007A - Riding working machine traveling in paddy field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a riding working machine traveling in a paddy field, designed so as to go into and out of the paddy field and be loaded and unloaded on a truck, at a superlow traveling speed. SOLUTION: This riding working machine traveling in a paddy field has a transmission means 16 enabling a shift gear state of a routine operating speed to be changed into the state of a low traveling speed (superlow speed) different from the operation speed, for going into and out of the patty field or for other use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type paddy traveling machine such as a riding type rice transplanter, a submerged direct sowing machine and the like.

[0002]

2. Description of the Related Art Conventionally, for example, in a riding rice transplanter, a planting work speed, a reverse speed, and a traveling speed on a road are set by a stepped / stepless transmission of a belt or a stepped transmission of a gear type.

[0003]

Generally, the traveling speed of a riding rice transplanter is set at 2 m / sec on a road, and the planting speed is set at 0.4 to 1.2 m / sec. this is,
If planting is performed at too low a speed during the planting operation with the planting claws, the seedlings will fall from the planting claws due to the seedling holding power of the planting claws, and normal planting will not be performed. The setting has been made so that the effective rotational speed of the engine matches the above-mentioned working speed.

[0004] For this reason, even if the throttle device of the engine is set to the minimum, it is impossible to run at a speed lower than the aforementioned speed. However, when entering or exiting a field or loading / unloading a truck, for example, the distance between the front and rear wheels is small due to the small distance between the front and rear wheels for the purpose of reducing the turning radius of the riding rice transplanter in the field. Because it leans forward, an ultra-low speed (creep speed) that is lower than the normal working speed is required.
Can be.

[0005] In addition, while a rice transplanter usually carries out rice transplanting work and traveling on the road while riding, when the driver enters and exits the field and unloads trucks, etc., while the driver is riding, the body becomes large in the front and rear. It may be easier to get off the bus because it may give anxiety or fear due to the inclination. Therefore, according to the present invention, apart from the normal working speed, an extremely low speed (for example, 0.1 m / sec) when crossing a ridge or the like is performed.
It is a first object of the present invention to provide a riding type paddy traveling work machine which can be operated (steered) with a margin when crossing a ridge or the like by providing a transmission device capable of obtaining the following.

A second object of the present invention is to operate and control the vehicle from a position where the vehicle has dropped off at an extremely low speed so that entry and exit to a field and loading and unloading to a truck can be performed without feeling uneasy or fearful. An object of the present invention is to provide a riding type paddy traveling work machine that can be operated.

[0007]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a normal working speed and, apart from this working speed, a low-speed running shift (ultra low speed) state for putting in and out of a field. Is provided with a transmission means that can perform the following. Further, in order to achieve the above-mentioned second object, the present invention is characterized in that an operating tool capable of controlling the traveling speed at the normal working speed and the ultra-low speed is provided so as to be operated from the getting off position. Is what you do.

[0008]

According to the present invention, when a riding type paddy traveling work machine (hereinafter simply referred to as a riding type rice transplanter) is moved over a ridge for entering and exiting a field, and when loading and unloading on a truck or the like, Normal working speed (for example, 0.4 to 1.2 m
/ Sec), which is lower than the running speed (0.1 m / sec).
The operation (steering) can be performed slowly and with a sufficient margin by using the method c).

[0009] In addition, it is possible to get over a ridge, etc., even if the driver gets on the vehicle. However, the driver operates the operating tool at a disembarkation position where the driver gets off the traveling vehicle body to set the traveling speed to a speed suitable for the ridge crossing. A safe and stable running can be performed at a low speed of 0.1 m / sec.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 1 denotes a riding type rice transplanter as a riding type paddy traveling work machine, which is equipped with a front wheel 2 and a rear wheel 3.
An engine 5 is mounted on a front portion of a four-shaft traveling vehicle body 4. A maneuvering section 8 including a maneuvering handle 6 and a driver's seat 7 is provided in the front and rear middle of the traveling vehicle body 4, and seedlings are provided behind the maneuvering section 8 via a lifting cylinder 9 and a lifting link mechanism 10. The device 11 is connected to be able to move up and down. Reference numeral 12 denotes a hood covering the engine 5, and reference numeral 13 denotes rear right and left rear fenders of the driver's seat 7.

In the first embodiment shown in FIGS. 1 to 4, the power of the output shaft 15 of the engine 5 is transmitted through the multi-stage belt transmission 16 as an auxiliary transmission to the transmission shaft 17 of the transmission case 17. The power is transmitted to the shaft 18 and transmitted to the front wheel 2 and the rear wheel 3 via a transmission such as a main transmission in the transmission case 17 and also transmitted to the seedling planting device 11 and the like.

The multi-stage belt transmission (transmission means) 1
Reference numeral 6 denotes a double tension system, in which two sets of pulleys 20 and 21 are provided on the output shaft 15 of the engine 5 and the transmission shaft 18 of the transmission case 17, respectively, and are wound around the pulleys 20L and 21L. Belt 2
2L is for low speed, and the pulleys 20H, 21H and the belt 22H wound around them are for high speed, and the tension pulleys 23L, 23
H can be pressed.

The tension arms 26L, 26H to which the respective tension pulleys 23L, 23H are attached are pivotally supported by a support shaft 27. And each front pin 28 has a switching link 30L, 30H.
The return holes 31L, 31H and one end of the clutch link 32 are connected to each rear pin 29.

The tension pulley 23, the tension arm 26, the return spring 31 and the like constitute tension applying means 24 for applying tension to the belt 22 of the belt transmission 16. The support shaft 27 is also pivotally supported by a speed change lever 35 having a grip 35A at an upper portion thereof, and an engagement pin 36 is provided in the middle in the longitudinal direction. Reference numeral 37 denotes a switching tool pivotally supported by a support shaft 38. Two switching pins 39L and 39H are protruded from the switching tool 37, and a long hole 40 is formed between the two pins 39L and 39H. The shift lever 35 is engaged with the engagement pin 36. The other ends of the switching links 30L and 30H are connected to the two pins 39L and 39H, respectively.

FIG. 1 shows a low-speed power transmission state. The low-speed side tension arm 26L causes the tension pulley 23L to move the low-speed side belt 2 by the pulling force of the return spring 31L.
Pressed against 2L. When the shift lever 35 is pivoted counterclockwise (in the direction of arrow A in FIG. 1) from this state, the switching member 37 rotates about the support shaft 38 to pull up the low-speed side switching link 30L and resist the return spring 31L. Then, the low-speed side tension arm 26L is lifted to reduce the tension of the belt 22L and cut off the power.

At the same time, the high-speed switching link 30
H can be lowered, and the high-speed side tension arm 26H is rotated by the return spring 31H, so that the tension pulley 23H is pressed against the belt 22H.
H is applied with tension to transmit high-speed power. At one end of the clutch link 32, a loose fitting portion 32A loosely fitted to the rear pin 29 of the tension arm 26 of both high and low speed.
Is formed, and the other end is linked to the clutch pedal 42.

A pedal 42 for engaging and disengaging the clutch is pivotally supported by a pivot shaft 43 fixed to the traveling vehicle body 4 below a step 44 so that its base (boss portion) can be freely depressed, and protrudes upward from the step 44. A claw 42A protrudes from the boss. A link 45 is pivotally supported on the pivot shaft 43, and the distal end of the link 45 is the clutch link 32.
The claw portion 42A can be engaged with the link 45 from above.

When the clutch pedal 42 is depressed, the pawl portion 42A rotates and engages with the link 45 from above, pulling the clutch link 32 in the downward direction B in FIG. The high-speed and low-speed tension arms 26 can be turned in the lifting direction to cut off both high-speed and low-speed power. It constitutes a tension type clutch.

Reference numeral 46 denotes an operation tool pivotally supported by the pivot shaft 43.
The upper grip 46B is located sufficiently in front of the speed change lever 35, and is located at a position where a dismounted operator (driver) can easily perform a turning operation. That is, the operation tool 4
Reference numeral 6 denotes a lever which is manually operable at a position in front of the step 44 and at a position where it does not interfere with getting on and off.

The operating tool 46 has a grip 46B
A claw 46A protrudes from the boss at the base similarly to the clutch pedal 42, and the claw 46A also engages with the link 45 from above to connect the clutch link 32 to FIG.
Pulling downward, the low-speed side and high-speed side tension arms 26 are turned in the lifting direction against the return spring 31 to cut off both high-speed and low-speed power.

That is, the operating tool 46 is manually operated (manual operation).
Clutch and brake (brake will be described later)
When the is operated, the clutch is disengaged and the brake is operated by the downward rotation operation, so that the operation is performed in the pressing direction to facilitate the operation. The operating tool 46 for operating the clutch and the brake at the disembarkation position includes:
The clutch is disengaged by turning in the direction away from the steering handle 6, in this embodiment, by turning forward as indicated by an arrow C in FIG.
It is configured to operate the brake, whereby one hand is put on the handle 6 and the other hand is applied to the operating tool 46, the clutch is disengaged by operation in opposite directions, and the brake operation is ensured, so that the vehicle is safely disembarked. It is possible to operate with.

Reference numeral 47 denotes a guide member of the operation tool 46, which is fixed to the bonnet 12 or the like, and is capable of holding the operation tool 46 constituted by a lever which can be manually operated at each operation position. The lifting tension arm 26 includes:
Actually, only the entrance side where the tension pulley 23 represses the belt 22 is adjusted, and the tension of the belt 22 by the tension pulley 23 can be changed by adjusting the lifting amount of the tension arm 26.

When the operating tool 46 is disposed (held) at the position where the guide member 47 shown in FIG.
When the tension pulley 23 is elastically pressed against the belt 22 with a regular force, the low-speed or high-speed power can be transmitted normally, and when the tension pulley 23 is disposed (held) at one position of the guide member 47, the belt 22 is pressed by the tension pulley 23. As the force decreases, the tension of the belt 22 is loosened and a slip occurs.
, The slip rate is increased, the power transmitted by the belt transmission 16 is reduced, and the running speed is adjusted to a deceleration side from the speed set by the speed change lever 35. Here, the normal working speed (for example, the planting speed is 0.4 m / sec to 1.0 m / sec)
c) separately from a low-speed running state such as putting in and out of a field (over a ridge), loading and unloading on a truck, and the like.
A transmission means (belt transmission) capable of operating at a speed of m / sec is provided.

Further, when the operating tool 46 is turned to the cutting position, the tension pulleys 23 are separated from the belt 22, and the power transmission by the belt transmission 16 is cut off in the same manner as when the clutch pedal 42 is depressed. . Therefore, when the driver operates the operation tool 46 while slowly moving the riding type rice transplanter with the belt speed change device 16 at the low speed side at the disembarkation position in order to put the riding type rice transplanter into and out of the field, the moving speed is reduced. Can be further reduced or stopped, and the operation of the operating tool 46 in this disembarkation position can be performed by using one of the grips 46B because the grip 46B is provided below the steering handle 6.
B, the other hand can be carried over a row while the rice transplanter 1 is steered (steered) with the other hand hung on the steering handle 6 in a stable posture.

FIGS. 1, 3, and 4 show a brake device 51 of a power transmission system. The brake device 51 has a brake means 54 for braking a rotating shaft 53 that transmits power from the transmission case 17 to the rear wheel differential device 52, and an operation means 55 for operating the brake means 54 with an operation tool 46. . That is, a pedal 42 for operating the clutch at the boarding position, and an operating tool 46 for operating the clutch and the brake 51 that can be operated at the getting off position are provided. It is provided on a rotating part (rotating shaft 53) that transmits nearby power, so that the rice transplanter 1 can be stopped by operating the brake with a simple connection structure without using a brake in the transmission case or the like. is there.

More specifically, the brake means 54 is a band brake or a disc brake attached to the traveling vehicle body 4, and its operation lever 56 is rotated by a Bowden wire 57 of the operation means 55. One end of the inner wire 57 </ b> A of the Bowden wire 57 is inserted into an operating body 58 fixed to the operating tool 46, and a hook 59
Can be engaged with the operating body 58.

Therefore, when the operating tool 46 is turned to the brake position by rotating the operating tool 46 beyond the disengagement position of the clutch (see FIG. 3), the operating body 58 pulls the inner wire 57A through the latching tool 59, and As a result, the rotating shaft 53 can be braked by operating the brake means 54, and the traveling vehicle body 4 can be stopped by the operation tool 46 which can be manually operated at the getting off position.

FIG. 5 shows a second embodiment.
6 is pivotally supported on the support shaft 27 similarly to the speed change lever 35. An engagement member 48 is projected from the operation tool 46, and the engagement member 48 can be engaged with the rear pin 29 of the high-low tension arm 26. In addition, it is possible to change the position of the high and low tension arms 26 without using the clutch link 32, finely adjust the tension of the belt 22, and perform the shifting operation of the traveling vehicle body 4. Incidentally, also in the second embodiment, the brake device 5
1 can be added.

Also, the clutch pedal 42 and the operating tool 46 for operating the clutch and the brake can engage with the link 45 from above with the respective claw portions 42A, 46A. To
The claw portions 42A and 46A come into contact with the link 45,
Even if each is operated, the other (pedal or operating tool) does not move, so there is no danger of the operating tool moving carelessly and pinching the hand.

Further, by providing the operating tool 46 near the pedal 42, clutch operation by the pedal 42 and
This makes it easier to coordinate the manual clutch release operation. FIGS. 6 and 7 show a third embodiment. This operating tool 46 is pivotally supported by a support shaft 27, and an arc-shaped plate 49 centered on the support shaft 27 is fixed to a middle part in the longitudinal direction. A locking hole 49A is formed in the arc plate 49, and a locking pin 50 protruding from the transmission lever 35 is detachable from the locking hole 49A. Operating tool 4 of the third embodiment
6 can be swung right and left slightly, and when the arc plate 49 is moved so that the locking hole 49A is opposed to and engaged with the locking pin 50, the shift lever 35 is rotated by rotating the operating tool 46. It can be operated dynamically.

That is, similarly to the operation of the shift lever 35 from the dismounting position, the shift operation of the belt transmission 16 can be performed by the operating tool 46 indicated by the lever, and even a short person who cannot reach the shift lever 35 can be easily operated. Can be operated. The guide member 47 shown in FIG.
A guide groove 47B for the operating tool 46 is formed in addition to the guide groove 47A. The guide groove 47B can be held at each of the high-speed, low-speed, and neutral operation positions similarly to the guide groove 47A. A retracting position is formed in which the retaining hole 49A is detached from the retaining pin 50, retracted at the disengaged position, and held at this position.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the belt transmission 16 may be a triple tension type belt transmission having three sets of belt transmission means or a continuously variable transmission type belt transmission having only one set of belt transmission means using split pulleys. In addition, the operating tool 46 by a lever for manually operating the clutch and the brake at the disembarkation position can be arranged on the front side of the bonnet 12, near the fender 13, or the like, and the shift lever 35 is moved to the position where it is most difficult to operate from the disembarkation position. Since it is arranged, if it is located at a position distant from the shift lever 35, in most cases, it will be a position that is easier to operate from the getting off position than the shift lever 35.

[0033]

According to the present invention described in detail above, a very low traveling speed different from the normal working speed is secured.
When entering / leaving a field, loading / unloading to / from a truck, etc., operation (steering) can be performed slowly and with a margin (claim 1). Since the operation tool can be operated at an extremely low speed at the disembarkation position, safe and stable traveling at low speed can be performed (claim 2).

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the belt transmission (transmission means).

FIG. 3 is an exploded perspective view of the main part.

FIG. 4 is a side view of the riding type rice transplanter.

FIG. 5 is a side view showing a second embodiment.

FIG. 6 is a side view of the third embodiment.

FIG. 7 is a sectional view taken along line XX of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 5 Engine 15 Output shaft 16 Belt transmission (transmission means) 17 Transmission case 18 Transmission shaft 23 Tension pulley 26 Tension arm 35 Shift lever 42 Clutch pedal 46 Operating tool

Claims (2)

[Claims] 1. A riding type paddy field traveling work which is provided with a transmission means capable of a low traveling speed (ultra low speed) state for taking in and out of a field separately from the normal working speed and the working speed. Machine. 2. The riding type paddy traveling work machine according to claim 1, further comprising an operating tool capable of controlling the traveling speed at the normal working speed and at an extremely low speed so that the operating device can be operated from a disembarkation position. .