JPH09104258A - Riding farm work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent increasing of a speed even when an acceleration means is operated at traveling time when a main speed change lever is changed to a moving speed shift or reverse speed shift. SOLUTION: A regulating arm 72 is provided, which regulates acceleration action by a subspeed change lever 4 increasing a speed of a traveling drive system, when a main speed change lever 3 switching a moving speed shift, working speed shift and a reverse speed shift is operated to one of the moving speed shift and reverse speed shift.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding agricultural work machine such as a riding rice transplanter, and more particularly, to a main speed change lever for switching between a moving speed stage, a working speed stage and a rear speed stage, and an increasing speed for increasing the rotation of a traveling drive system. And a riding agricultural work machine provided with the means.

[0002]

2. Description of the Related Art Conventionally, a riding agricultural machine such as a riding rice transplanter has a main speed change lever for switching between a traveling speed stage where rice planting work is not performed, a working speed stage where rice planting work is performed, and a rear speed stage, and rotation of a traveling drive system. It is equipped with speed-up means such as an auxiliary gear shift lever and speed-up pedal. Then, by operating the speed increasing means according to each shift speed, acceleration / deceleration can be performed at each shift speed.

[0003]

As described above, since the conventional riding agricultural work machine is capable of speeding up / decreasing at each shift speed, it can be moved on the road, that is, when it is traveling on the road with less movement resistance compared to agricultural work in a paddy field. When driving at a speed stage, or when loading or unloading a truck, when putting in the rear speed stage and retracting the aircraft, when the speed increasing means is operated, it becomes a dangerous speed, There was a problem that the aircraft could become unstable and could lead to a fall accident.

According to the present invention, the riding agricultural work is capable of preventing the traveling drive system from increasing in speed when the speed increasing means is operated during traveling with the main speed change lever being switched to the moving speed stage or the rear speed stage. The main purpose is to provide machines.

[0005]

In order to achieve the above main object, the present invention according to claim 1 switches a moving speed stage, a working speed stage and a rear speed stage as shown in FIG. Speed-up means S for increasing the rotation of the main transmission lever 3 and the traveling drive system
In the riding agricultural work machine provided with, the regulating means 7 for regulating the speed increasing operation by the speed increasing means S when the main transmission lever 3 is operated to one of the moving speed stage and the rear speed stage is provided.

[0006]

According to the first aspect of the present invention, as shown in FIG. 1, when the main transmission lever 3 is operated to one of the moving speed stage and the rear speed stage, the regulating means 7 is operated to increase the speed increasing means. S
Since the speed-up operation by the control is restricted, even if the speed-up means S is operated during traveling while switching the main speed change lever 3 to the moving speed stage or the rear speed stage, the traveling drive system is prevented from increasing in speed. It is possible. Therefore, even when the speed increasing means is operated when traveling in the moving speed stage, or when the vehicle is retracted by putting it in the rear speed stage when loading / unloading the truck, etc. It is possible to maintain good stability of the airframe without reaching a critical speed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The riding agricultural work machine according to the embodiment shown in FIGS. 4 and 5 has front and rear wheels 14 having a small diameter and a narrow width, which are interlocked with an engine 13, on the left and right sides of a machine body 10 having a driver's seat 11 and a steering wheel 12. 14, a rear wheel 16 having a large diameter and a wide width, which is also linked to the engine 13 via the transmission 15.
16 and a hydraulic cylinder 17 at the rear of the machine body 10.
And a passenger rice transplanter in which the rice transplanter 2 is connected via an elevating device 18 having a lower link 18a, a top link 18b, and a gate-shaped support 18c that are interlocked with the lower link 18a, and the transmission 15 includes a main transmission device and an auxiliary transmission device. In addition, the rice transplanter 2 is equipped with the transmission 15
It is linked to a PTO shaft 19 extending from the side.

In the vicinity of the driver's seat 11 of the machine body 10, a main speed change lever 3 for switching the main speed changer to a "moving speed" speed, a "work speed" speed and a "reverse speed" speed, and the auxiliary speed change gear. The auxiliary gear shift lever 4 for increasing the rotation of the traveling drive system between the engine 13 and the rear wheels 16 and 16 by switching the device between the "speed-up" stage and the "low-speed" stage, and the depression operation linked to the accelerator of the engine 13. A speed increasing pedal 5 for increasing the rotation of the traveling drive system by means of a pair of brake pedals 6a, 6b for operating a brake device provided on each of the rear wheels 16, 16.
And the main transmission lever 3 in the posture of sitting in the driver's seat 11.
The auxiliary shift lever 4, the speed increasing pedal 5, and the brake pedals 6a and 6b can be operated. The auxiliary transmission lever 4 and the speed increasing pedal 5 constitute a speed increasing means S for increasing the rotation of the traveling drive system. Either one of the auxiliary transmission lever 4 and the speed increasing pedal 5 of the speed increasing means S may be provided.

The main shift lever 3 is moved along a guide hole 31 of the shift guide 30 as shown in FIG. 6 (a), whereby a "moving speed" step position, a "neutral" position,
It is possible to switch between the "working speed" step position, the "seed joint" position and the "reverse speed" step position. In addition, as shown in FIG.
By moving along the 0 guide hole 41, in addition to the “acceleration” step position, the “low speed” step position, a “marker” position for setting a predetermined marker, a “neutral” position, and a hydraulic cylinder. "17" to lift 17 and lift device 18
It is possible to switch to the position, and in the area A from the “down” position to the “marker” position, the hydraulic cylinder 17 is used to lower the lifting device 2, and in the area B from the “cut” position to the “neutral” position, The power output of the PTO shaft 19 can be switched to off.

Further, between the main speed change lever 3 and a position near the auxiliary speed change lever 4, when the main speed change lever 3 is operated to one of the "moving speed" speed and the "reverse speed" speed, A restriction unit 7 that restricts the speed-up operation by the auxiliary transmission lever 4 is provided.

The restricting means 7 includes a restricting arm 72 pivotally supported at a position near the auxiliary speed change lever 4 on the machine body 10 via a pivot shaft 71, the restricting arm 72 and the main speed change lever 3. It is composed of an interlocking rope 73 extending between the two. The interlocking rope 73 includes an inner wire 73a having one end hooked on the longitudinal middle portion of the main shift lever 3 and the other end hooked on the regulating arm 72, and an outer cylinder 73b for guiding the inner wire 73a. This outer cylinder 73b
An outer receiver 7 that rotatably supports one end of the main gear shift lever 3 at a position displaced toward the grip 3a side with respect to the support position of the main gear shift lever 3 via a horizontal axis parallel to the rotation center line of the main gear shift lever 3.
4 and the other end thereof is locked to a receiving body 75 fixed near the pivotal support position of the regulating arm 72 to lock the inner wire 73a from the rotation center O1 of the outer receiver 74 to the main shift lever 3. The length up to the point O2 is "H" when the main speed change lever 3 is operated to one of the "moving speed" speed and the "reverse speed" speed.
"1" moves the main gearshift lever 3 to the "working speed" stage and "neutral"
It is designed to be longer than the length “H2” when it is operated to one of the positions.

By doing so, when the main transmission lever 3 is operated from the "working speed" stage or "neutral" position to the "moving speed" stage or "reverse speed" stage position, the inner wire 73
As a is pulled, the regulating arm 72 swings to the regulating position as shown by the chain line in FIG.
Movement to the position (in the direction of the arrow in FIG. 1) can be restricted. When the main shift lever 3 is operated from the "moving speed" stage or the "reverse speed" stage position to the "working speed" stage or the "neutral" position, the inner wire 73a is relaxed, and the regulating arm 72 is shown by the solid line in FIG. Return to unregulated position. Therefore, the auxiliary transmission lever 4 can be moved to the "acceleration" stage position.

The restricting means 7 uses the interlocking rope 73, and although not shown, it operates when the main speed change lever 3 is operated to the "moving speed" speed position or the "reverse speed" speed position, for example. It is also possible to use a detection switch that operates and an electromagnetic solenoid that operates according to the detection signal output from the detection switch to move the swing arm 72 to the regulation position. In this case, the restriction arm 72 may be omitted, and the movement of the auxiliary transmission lever 4 may be restricted by a rod that interlocks with the electromagnetic solenoid.

Further, in the above embodiment, the restricting means 7 for restricting the speed increasing operation by the auxiliary shift lever 4 has been described, but in addition, the speed increasing operation by the speed increasing pedal 5 may be restricted. The restricting means 7 in this case is the same as that in each of the above-described embodiments, and thus detailed description thereof will be omitted.

Further, in the embodiment shown in FIGS. 7 and 8,
A connector 61 that connects the brake pedals 6a and 6b to each other and operates simultaneously, and a pedal restriction mechanism 60 that operates in conjunction with the operation of the connector 61 and restricts the speed-up operation by the speed-up pedal 5 are provided. .

The connector 61 is used for each brake pedal 6
a, 6b is composed of a pair of elongated plate members opposed to the tread surface and the back surface, and one end of this connector 61 is pivotally supported on one brake pedal 6a so that the connector 61 is on the other brake pedal 6b side. The brake pedals 6a and 6b are connected to each other by lying down on the
A and 6b are operated at the same time.

Further, the pedal restricting mechanism 60 is the body 1
0, a regulating arm 63 pivotably supported at a position near the speed increasing pedal 5 via a pivot shaft 62, and an interlocking rope 64 stretched between the regulating arm 63 and the tip of the connector 61. It consists of and. The interlocking rope 64 has an inner wire 64a having one end hooked on the tip of the connector 61 and the other end hooked on the regulating arm 63, and the inner wire 64a.
And an outer cylinder 64b for guiding the outer cylinder 64b. One end of the outer cylinder 64b is locked to the receiving body 65 fixed to the leg portion of the brake pedal 6b, and the other end is fixed near the pivot position of the regulating arm 63. The receiver 66 is locked. And
A return spring 67 that constantly urges the regulation arm 63 to urge the regulation arm 63 is interposed between the pivot shaft 62 and the regulation arm 63, and a wire receiver 68 that is connected to an end of the pivot shaft 62 and the regulation. A fulcrum-over spring 69 that selectively urges the regulating arm 63 to one side with respect to the intermediate position of the swing range is provided between the arm 63 and the arm 63, and the connector 61 falls to the pedal connecting position as shown in FIG. Then, the force of the return spring 67 moves the regulating arm 63 to the regulating position as shown by the solid line in FIG. 7, whereby the operation of the speed increasing pedal 5 can be regulated, and the connector 61 is moved to the non-coupling position (counterclockwise position in FIG. 7). ) To release the connection between the brake pedals 6a and 6b, the interlocking rope 64
The inner wire 64a is pulled against the return spring 67, and the restriction arm 63 moves to the non-restricted position shown by the chain line in FIG.

By doing so, the brake pedals 6a and 6b are connected by the connector 61 and are operated simultaneously when the vehicle travels on the road at the traveling speed stage, or when loading / unloading to / from a truck, and the left and right rear wheels are operated. When the brakes 16 and 16 are braked simultaneously, the return spring 67 causes the restriction arm 63 to move to the position shown in FIG.
As shown by the solid line, it is possible to swing to the regulation position to regulate the depression of the speed increasing pedal 5. Therefore, when the brake pedals 6a and 6b are connected by the connector 61,
It is possible to prevent acceleration due to intentional operation and erroneous operation.
Further, when the connector 61 is retracted to the non-coupling position so that the brake pedals 6a and 6b can be operated independently, the inner wire 64a of the pedal restricting mechanism 60 is pulled to restrict the brake pedal as shown by the chain line in FIG. The arm 63 moves to the non-regulating position.

The pedal restricting mechanism 60 includes the interlocking rope 6
4, the detection arm 60a operates when the connector 61 is operated to the connecting position, and the swing arm operates by the detection signal output from the detection switch 60a, as shown in FIG. An electromagnetic solenoid (not shown) that operates 63 to the regulation position may be used.
In this case, the restricting arm may be omitted and the operation of the speed increasing pedal 5 may be restricted by a rod interlocking with the electromagnetic solenoid.

Further, in the embodiment shown in FIG. 10, when the main shift lever 3 is operated to the "seed joint" position, the hydraulic cylinder 17 is operated to operate the elevating device 18 to lower the planting position. The rice planting device 2 is slightly raised by the auxiliary gear shift lever 4 to a "neutral" position.
That is, the detection switch 20 that operates when the main transmission lever 3 is operated to the "seed joint" position, and the control signal 21 that operates by the detection signal output from the detection switch 20 to control the control valve 21 of the hydraulic cylinder 17, An electromagnetic solenoid 22 that operates the spool 21a of the control valve 21 to the side that raises the lifting device 18 is provided. By doing so, when the length of the float 23 in the rice planting device 2 is short, or when the fertilizer applicator 24 is set in the rice planting device 2, the auxiliary transmission lever 4 of FIG. Even if the rice transplanter 2 is operated to the area A and descends to the planting position and is in the planting state,
It is possible to effectively prevent the float 23 from sinking and to make it difficult for the fertilizer application section 24 to become moist.

When the auxiliary transmission lever 4 is operated from the area A in FIG. 6B to the "up" position in the area B, the hydraulic cylinder 17 is used to slightly raise the lifting device 18, and then the automatic transmission is automatically operated. The sub-transmission lever 4 may be automatically returned to the "neutral" position by the return means.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view in which a main shift lever, a speed increasing means, and a restricting means of a riding agricultural working machine of the present invention are taken out.

FIG. 2 is a plan view of a shift lever portion of FIG.

FIG. 3 is a side view of FIG. 1 in a state in which the speed increasing operation by the speed increasing means is restricted.

FIG. 4 is a side view showing the overall structure of the passenger farm working machine.

FIG. 5 is a plan view of only a body part of the passenger farming machine.

FIG. 6 is an explanatory view showing a shift guide of the main shift lever and speed increasing means.

FIG. 7 is a schematic explanatory view showing the brake pedal, a speed increasing pedal, and a restricting mechanism taken out.

FIG. 8 is a bottom view of the speed increasing pedal portion of FIG.

9 is an explanatory view showing another embodiment of FIG.

FIG. 10 is an explanatory view showing still another embodiment.

[Explanation of symbols]

 3 ... Main gear shift lever 7 ... Regulating means S ... Speed increasing means

Claims (1)

[Claims] 1. A main shift mechanism for a riding agricultural work machine comprising a main speed change lever (3) for switching between a moving speed stage, a working speed stage and a rear speed stage, and a speed increasing means (S) for increasing the rotation of a traveling drive system. A riding agricultural working machine characterized by comprising a regulating means (7) for regulating the speed increasing operation by the speed increasing means (S) when the lever (3) is operated to one of the moving speed stage and the rear speed stage.