JPH08108778A - Farm working vehicle - Google Patents

Abstract

PURPOSE: To restrain a sudden departure of a machine body at the time of restarting work by returning a clutch pedal from the state where work is discontinued by operating the clutch pedal to the clutch disengaging side to the clutch engage side in a farm working vehicle. CONSTITUTION: When a clutch pedal 6 of a main clutch is operated to the clutch disengaging side, a transmission 18 for traveling is operated to the low speed side, interlocking with the above operation, and even if the clutch pedal 6 is returned to the clutch engage side, the transmission 18 for traveling is held on the low speed side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work vehicle represented by an agricultural tractor or a riding type rice transplanter, and more particularly to a structure of a traveling speed change system thereof.

[0002]

2. Description of the Related Art In a passenger type rice transplanter which is an example of an agricultural work vehicle, an accelerator holding mechanism capable of holding an accelerator lever at an arbitrary position and a clutch lock mechanism capable of holding a clutch pedal for main clutch on / off operation on a clutch disengagement side. This is because the riding type rice transplanter often carries out planting work while traveling at a constant speed, and it is possible to interrupt the planting work by disengaging the clutch even during planting work. Because it is.

[0003]

With the above structure, when the seedlings are reduced during planting work with the accelerator lever held at the set position, the main clutch is disengaged by the clutch pedal to operate the clutch pedal. If it is kept on the clutch disengagement side, all of the running system and planting device of the aircraft will stop, so seedling replenishment can be done without the hassle of disengaging the planting clutch and switching the neutral position of the traveling transmission. After the seedling supply is completed, if the clutch lock mechanism is removed and the clutch pedal is returned to the clutch entry side to restart the planting work, the accelerator lever will remain at the set position during the planting work. There was a case where the car suddenly started. Here, the present invention focuses on the above-mentioned problem, and an object thereof is to prevent a situation in which the airframe suddenly starts when the work is resumed from a state where the work is interrupted.

[0004]

As in the present invention, the deceleration means is interlocked with the operation of holding the clutch pedal to the clutch disengagement side to operate the accelerator to the low speed side or the traveling transmission to the low speed side, for example. Even if the clutch pedal is subsequently returned to the clutch entry side by operating it, the aircraft will not suddenly start.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings using a riding-type rice transplanter which is an example of an agricultural work vehicle. As shown in FIG. 3, an engine 3 is attached to the front of the machine supported by front wheels 1 and rear wheels 2, a control unit 4 is connected to the center of the machine, and a planting device 5 is connected to the rear of the machine so that it can be moved up and down. Has been done. As shown in FIGS. 1 and 3, a clutch pedal 6 is pivotally supported around a horizontal axis P1 of the control section 4 and the clutch pedal 6 is connected to a main clutch 7 via a linkage rod 8. ing. A lock pedal as a clutch lock mechanism 9 is attached to the clutch pedal 6 so as to be swingable around a horizontal axis P2, and is urged clockwise by a spiral spring 10 in FIG.

On the other hand, an accelerator lever 13 provided in the control section 4 and provided with a friction fixing mechanism as an accelerator holding mechanism 12 is connected to the throttle lever 11 of the engine 3 via the push full wire 14, and the control section is also provided. Four
Rocking type operation arm 16 provided on the rear surface of the floor 15
The throttle lever 11 and the throttle lever 11 are connected via a wire 17.

When the clutch pedal 6 is stepped on and the clutch 7 is disengaged as shown in FIG. 2, the lock pedal 9 provided on the clutch pedal 6 engages with the floor 15 and the clutch pedal 6 and the clutch 7 are disengaged. Will be held by the side. In this case, the tip of the lock pedal 9 pushes the end of the operation arm 16 to swing the operation arm 16. As a result, the wire 17 is pulled and the throttle lever 11 and the accelerator lever 13, which were on the high speed side H, are forcibly returned to the low speed side L.
To return the clutch pedal 6 to the clutch entry side,
This is done by depressing the lock pedal 9) to disengage the lock pedal 9 from the floor 15.

[Other Embodiments of the Invention] As shown in FIGS. 3 and 4, a shift lever 20 and a clutch pedal 6 of a belt-type continuously variable transmission 18 of a split pulley type which is installed from an engine 3 to a mission 19. A structure in which the wires are linked by a wire 21 can also be adopted. That is, the gear shift lever 20 is biased to the low speed side by the spring 22, and the gear shift lever 20 can be held at the set position with respect to the guide portion 24 by the lock pin 23 that can be slid vertically. The lock pin 23 and the clutch pedal 6 are connected by a wire 21, and when the clutch pedal 6 is stepped on, the lock pin 23 is slid downward via the wire 21 to engage with the guide portion 24. Is released, and the shift lever 20 is returned to the low speed side L by the biasing force of the spring 22.

[0009]

As described above, it is possible to prevent the situation where the machine body suddenly starts when the work is resumed from the work suspended state, and the safety of the agricultural work vehicle is improved. In particular, when the accelerator operation is performed, it is effective to save the fuel and improve the durability of the engine itself by suppressing the idling of the engine during the interruption of the traveling work.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a diagram showing a linked state of a clutch pedal, a main clutch, and an accelerator lever.

FIG. 2 is a view showing a state in which a clutch pedal is held and operated to be disengaged from the state shown in FIG.

FIG. 3 is an overall side view of a riding rice transplanter.

FIG. 4 is a diagram showing a linked state of a clutch pedal and a belt type continuously variable transmission according to another embodiment of the invention.

[Explanation of symbols]

 3 Engine 6 Clutch Pedal 9 Clutch Lock Mechanism 12 Accelerator Holding Mechanism 18 Traveling Transmission

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 7, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of invention] Farm vehicle

[Claims] 1. When the clutch pedal (6) for the on / off operation of the main clutch (7) is operated to the clutch disengagement side, the transmission (18) for traveling is operated to the low speed side in conjunction with this, and the clutch Transmission deceleration means (21), (22), (23), which hold the traveling transmission (18) at a low speed side even if the pedal (6) is returned to the clutch on side.
An agricultural work vehicle provided with (24). 2. The agricultural work vehicle according to claim 1, further comprising a clutch lock mechanism (9) capable of holding the clutch pedal (6) on a clutch disengaged side.

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a traveling speed change system in an agricultural work vehicle represented by an agricultural tractor and a riding type rice transplanter.

[0002]

2. Description of the Related Art A riding type rice transplanter, which is an example of an agricultural vehicle, has a main clutch on the upper side of a seedling planting device and a speed change device for traveling, and a clutch pedal for opening and closing the main clutch. I have it. As a result, if the seedling stand has a small amount of seedlings during planting work and it is necessary to replenish the seedling stand with seedlings, the clutch pedal can be used to disengage the main clutch to operate the aircraft running system and seedlings. Since the planting device is stopped, the seedling can be replenished to the seedling stand without performing the operation of disengaging the planting clutch for the seedling planting device and the operation to the neutral stop position of the speed change device for traveling.

[0003]

As described above, when the seed clutch is supplied to the seedling stand by disengaging the main clutch with the clutch pedal, the planting work is restarted after the seedling supply is completed. Therefore, the clutch pedal is released and the main clutch is turned on. In this case, the transmission for traveling is in a state before the main clutch is disengaged (state during planting work), so if the clutch pedal is released and the main clutch is engaged as described above, May start suddenly. When the aircraft suddenly starts in this way, the front part of the aircraft is lifted by the reverse torque from the wheels and the seedling planting device at the rear of the aircraft lowers, temporarily raising the seedling planting depth by the seedling planting device. Will end up. It is an object of the present invention to prevent a state in which a machine suddenly starts when resuming work from a state where work is suspended in an agricultural work vehicle.

[0004]

According to the present invention, when the clutch pedal is operated to the clutch disengagement side to stop the machine body, the traveling transmission is operated to the low speed side in conjunction with this operation. It is held at this low speed side. Then, even if the clutch pedal is thereafter returned to the clutch-in side, the traveling transmission is retained at the low speed side and is held, and the aircraft smoothly starts without suddenly starting.

Further, if a clutch lock mechanism capable of holding the clutch pedal on the clutch disengagement side is provided, when the clutch pedal is operated to the clutch disengagement side to stop the vehicle body, the clutch lock mechanism disengages the clutch pedal from the clutch disengagement side. By holding at, the aircraft can be stopped even if the foot is released from the clutch pedal. This facilitates another work (such as supplying seedlings to the seedling stand) when the work is interrupted.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings using a riding-type rice transplanter which is an example of an agricultural work vehicle. As shown in FIG. 2, an engine 3 is provided at the front of the machine body supported by front wheels 1 and rear wheels 2, a control section 4 is provided at the center of the machine body,
The seedling planting device 5 is movably connected to the rear part of the machine body to constitute a riding-type rice transplanter.

As shown in FIG. 1, the horizontal axis P1 of the control section 4
A clutch pedal 6 is swingably supported around the clutch pedal 6, and the clutch pedal 6 is connected to a main clutch 7 via a connecting rod 8. A lock pedal 9 (corresponding to a clutch lock mechanism) that is swingable around the horizontal axis P2 of the clutch pedal 6.
Is attached and is urged by the spiral spring 10 in the clockwise direction on the paper surface of FIG.

With the above structure, when the clutch pedal 6 is depressed and the main clutch 7 is disengaged, the lock pedal 9 provided on the clutch pedal 6 engages with the floor 15 and the clutch pedal 6 and the main clutch 7 are disengaged. Held by the side. Then, the clutch pedal 6 is returned to the clutch entry side by depressing the lock pedal 9 to disengage the lock pedal 9 from the floor 15.

As shown in FIGS. 1 and 2, a belt-type continuously variable transmission 18 of a split pulley type (corresponding to a transmission for traveling) is installed from the engine 3 to the transmission 19, and the belt-type continuously variable transmission is provided. The gear shift lever 20 of 18 and the clutch pedal 6 are linked by a wire 21 (corresponding to a transmission deceleration means).

In this case, the speed change lever 20 is the spring 2
A lock pin 23 (corresponding to a transmission deceleration means) that is urged toward the low speed side L by 2 (corresponding to a transmission deceleration means) and is vertically slidable is used to guide the transmission lever 20 to the guide portion 24 (transmission device). It can be held at the set position (corresponding to the deceleration means). The lock pin 23 and the clutch pedal 6 are connected by the wire 21, and when the clutch pedal 6 is stepped on, the lock pin 23 is slid downward via the wire 21 to engage with the guide portion 24. The gear shift lever 20 and the belt type continuously variable transmission 18 are returned to the low speed side L and held by the biasing force of the spring 22.

[0011]

As described above, it becomes possible to prevent a state in which the aircraft suddenly starts when the work is resumed from the temporarily interrupted state of the operation with the main clutch disengaged, and the aircraft suddenly starts. Inconvenience due to lowering of the rear part of the machine (temporary deepening of the seedling planting depth by the seedling planting device on the rear part of the fuselage or temporary deepening of the tilling depth by the tiller on the rear part of the fuselage) It was possible to prevent such a situation.

If a clutch lock mechanism capable of holding the clutch pedal on the disengaged side of the clutch is provided, it becomes possible to stop the machine body even when the foot is released from the clutch pedal. Since it becomes easy to perform another work (such as supplying seedlings to the seedling stand), workability can be improved.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a diagram showing a linked state of a clutch pedal, a main clutch, a speed change lever, and a belt type continuously variable transmission.

[Figure 2] Overall side view of the riding type rice transplanter

[Explanation of Codes] 6 Clutch Pedal 7 Main Clutch 9 Clutch Lock Mechanism 18 Traveling Transmissions 21, 22, 23, 24 Transmission Reduction Mechanism

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

Claims (1)

[Claims] Clutch pedal (6) for turning on and off the main clutch (7)
Is operated to the clutch disengagement side, the transmission (18) for traveling is operated to the low speed side in conjunction with this, and the clutch pedal (6) is returned to the clutch entrance side,
Transmission deceleration means (21), (22), (23), (24) for holding the traveling transmission (18) on the low speed side.
Farm work vehicle equipped with.