JP3354879B2 - Riding paddy traveling work machine - 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 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]

For example, the traveling speed of a riding rice transplanter is generally set at 0.4 to 1.2 m / sec. This is because if planting is performed at too low a speed during planting work with the planting claws, seedlings fall from the planting claws due to the seedling holding power of the planting claws and normal planting is not performed For this reason, 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 / leaving a field or loading / unloading a truck, etc., the distance between the front and rear wheels is reduced for the purpose of reducing the turning radius of the riding type paddy traveling work machine in the field, and the riding type paddy field is disturbed. Since the traveling work machine leans forward and backward greatly, a very low speed (creep speed) lower than the normal work speed is required. When the speed is set to the very low speed, the operation (steering) can be performed with a margin.

[0005] In addition, the riding paddy traveling work machine normally performs paddy traveling work and traveling on the road while riding, but when the driver goes in and out of fields and unloads trucks, etc., is carried out with the driver on board. It may be easier to get off the vehicle because the aircraft may be tilted greatly back and forth, giving anxiety and fear. Therefore, an object of the present invention is to provide a sub-transmission that can obtain an extremely low speed (for example, 0.1 m / sec) when crossing a ridge, etc., separately from the normal operation speed set by the main transmission. By mistake , operation mistake
An object of the present invention is to provide a riding type paddy traveling work machine that can easily operate (steer) when crossing a ridge or the like while facilitating prevention of ridges.

[0006] In addition, at the ultra-low speed by the sub-transmission, a low speed for getting in and out of a field from a position where the user gets off the vehicle.
It is an object of the present invention to provide a riding paddy traveling work machine that can be operated calmly without running out or entering a field or loading / unloading a truck without fear or fear by performing a traveling speed change operation.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a riding paddy field equipped with a clutch, a brake, and a main transmission in a power transmission system for transmitting the power of an engine to front wheels and rear wheels. In the working machine, apart from the normal working speed set by the main transmission and this working speed, a sub-transmission that can perform a low-speed traveling shift state for entering and exiting a field or the like is provided, and the sub-transmission is set to a riding position. Operable
In addition to the gear shift lever, low-speed running for getting in and out of the field, etc.
A single operating tool capable of performing a line shift operation is provided so that it can be operated from the getting off position.

[0008]

According to the present invention, when a riding type paddy traveling work machine is moved over a ridge for entering and exiting a field, and when loading / unloading on a truck or the like, a normal working speed (for example,
0.4~1.2m / sec) loading and unloading the like to the fields than
By operating the vehicle in a low-speed traveling shift state ( for example, 0.1 m / sec), the operation (steering) can be performed slowly and with a sufficient margin. In addition, when crossing ridges or loading / unloading trucks, the driver operates the operating tool at the exit position from the traveling vehicle to enter / exit the field.
For example, a low speed traveling speed change operation is performed , and the riding type paddy traveling work machine can be controlled without panic as a synergistic effect with the fact that the vehicle is traveling at an extremely low speed, so that safe and stable traveling can be performed.

[0009]

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 a truck, etc., operation (steering) can be performed slowly and with a margin. In addition, since the auxiliary speed change device capable of operating at an extremely low speed is provided, there is little possibility that the speed is erroneously reduced to an extremely low speed during a main speed change operation mainly for shifting in a field. In addition, the auxiliary transmission can be operated at the riding position.
For getting in and out of the field at the alighting position separately from the shift lever
Ultra slow steering at low speed traveling shift-operable single operating member
Since it created, to control the riding paddy traveling working machine without panic as synergy with it a very low speed, it is possible to perform safe and stable travel at very low speed.

[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) 16 is of a double tension type, and 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. , The pulleys 20L, 21L and the belt 22L wound around them are for low speed,
H and the belt 22H wound around them are for high-speed use, and the tension pulley 2 is attached to each of the belts 22L and 22H.
3L and 23H can be pressed.

The tension arms 26L and 26H to which the tension pulleys 23L and 23H are attached are pivotally supported by a support shaft 27. Pins 28 and 29 are provided on the tension arms 26L and 26H at front and rear positions of the support shaft 27. Each front pin 28 has a switching link 30L, 30H.
The return holes 31L and 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 a tension applying unit 24 that applies tension to the belt 22 of the belt transmission 16.

A speed change lever 35 having a grip 35A is also pivotally supported on the support shaft 27, and an engagement pin 36 is provided in the middle in the longitudinal direction. 37
Is a switching device pivotally supported by a support shaft 38, and includes two pins 39
L and 39H are protruded, and a long hole 40 is formed between the two pins 39L and 39H. The long hole 40 is fitted to the engagement pin 36 of the transmission lever 35. The two pins 39L and 39H have switching links 30L and 3L respectively.
The other end of 0H is connected. FIG. 1 shows a low-speed power transmission state, in which the low-speed side tension arm 26L is pulled by a tension force of a return spring 31L.
Is pressed against the low-speed side belt 22L. When the shift lever 35 is swung in the counterclockwise direction (the direction of the 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 return the return spring 31L.
Then, the low-speed side tension arm 26L is lifted to reduce the tension of the belt 22L to 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 speeds.
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 below a step 44 on a pivot shaft 43 fixed to the traveling vehicle body 4 so that its base (boss portion) can be freely depressed, and protrudes upward from the step 44. A claw portion 42A protrudes from the boss portion. A link 45 is pivotally supported on the pivot shaft 43, and the tip of the link 45 is the clutch link 32.
And the claw portion 42A can be engaged with the link 45 from above. When the clutch pedal 42 is depressed, the claw portion 42A rotates and engages with the link 45 from above, pulling the clutch link 32 in the downward direction B in FIG. By turning both tension arms 26 in the lifting direction, it is possible to cut off both high-speed and low-speed power.
The belt transmission 16 constitutes a belt tension type clutch for intermittently transmitting engine power to the transmission.

Reference numeral 46 denotes an operating 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
Numeral 6 is provided in the front position of the step 44 and at a position which does not interfere with getting on and off, and in this embodiment, is constituted by a lever which can be manually operated at the getting off position. This operation tool 4
6 has a grip 46B at the top, and a claw 46A protrudes from the base boss similarly to the clutch pedal 42, and this claw 46A also engages with the link 45 from above, so that the clutch link 1 is pulled downward in FIG. 1 and both the low-speed side and the 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 operation 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.
The brake is operated, whereby one hand is put on the handle 6 and the other hand is put on the operating tool 46, the clutch is disengaged by the operation in the opposite direction, and the brake operation is performed, so that the vehicle is reliably dismounted. It is possible to operate with.

Reference numeral 47 denotes a guide member for the operating tool 46, which is fixed to the hood 12 or the like, and is capable of holding the operating tool 46 constituted by a lever which can be manually operated at each operating 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 operation 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.
And the slip ratio is increased by loosening the tension, the power transmitted by the belt transmission 16 is reduced by this slip, and the traveling speed is adjusted to the deceleration side from the speed set by the shift 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 (crossing a ridge) and loading and unloading a truck.
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 operating tool 46 while slowly moving the riding type rice transplanter with the belt transmission 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 operable at the getting off position are provided, and the brake 51 operated by the operating tool 46 is Since it is provided on a rotating part (rotating shaft 53) that transmits nearby power, the rice transplanter 1 can be stopped by actuating 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 via the latching tool 59, and the brake means via the operating lever 56. 54, the rotating shaft 53 can be braked, 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, in which an operating tool 4 is provided.
6 is pivotally supported on the support shaft 27 similarly to the speed change lever 35, and an engaging body 48 is projected from the operating tool 46. The engaging body 48 is engageable with the rear pin 29 of the high and low tension arms 26. In addition, it is possible to finely adjust the tension of the belt 22 and change the speed of the traveling vehicle body 4 by changing the positions of the high and low tension arms 26 without using the clutch link 32. Incidentally, also in the second embodiment, the brake device 5
1 can be added. Further, the clutch pedal 42 and the operating tool 46 for operating the clutch and the brake include:
Since the claw portions 42A and 46A can be engaged with the link 45 from above, the claw portions 42A and 46A abut the link 45 so that the other does not cooperate when operating each. Even if the other (pedal or operating tool) does not move, there is no danger of inadvertently moving the operating tool 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, in which an 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 faces and engages 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 speed change lever 35 from the getting-off position, the speed change operation of the belt transmission 16 can be performed by the operation tool 46 indicated by the lever, and even a short person who cannot reach the speed change 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, and moves the arc plate 49. A retracting position is formed in which the locking hole 49A is disengaged from the locking 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 disposed in front 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.

[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 type paddy traveling work machine 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

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI B60K 41/22 B60K 41/22 B62D 11/08 B62D 11/08 V F16D 67/02 F16D 67/02 K F16H 61/26 F16H 61 / 26 (56) References JP-A-3-210113 (JP, A) JP-A-3-246120 (JP, A) JP-A-3-246125 (JP, A) JP-A-1-132307 (JP, A) JP-A-3-246120 (JP, A) JP-A-4-40812 (JP, A) JP-A-1-132428 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/02 B60K 17/02 B60K 20/02 B60K 23/02 B60K 41/22 B62D 11/08 F16D 67/02 F16H 61/26

Claims (1)

(57) [Claims] In a riding type paddy traveling work machine having a clutch, a brake, and a main transmission in a power transmission system for transmitting power of an engine to front wheels and rear wheels, a normal operation speed set by a main transmission and a normal operation speed set by the main transmission are determined. In addition to the work speed, a sub-transmission that can perform a low-speed traveling shift state for entering / exiting a field or the like is provided, and the sub-transmission is mounted at a riding position.
Entering and exiting the field separately from the shift lever operable with
A riding type paddy traveling work machine comprising: a single operating tool capable of operating a low-speed traveling speed change operation for operating the vehicle from an alighting position.