JPH0937618A - Safe traveling operation device for mobile agricultural machinery - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To effectively operate a main shift lever and a sub shift lever so that a mobile agricultural machine cannot run at a speed higher than a predetermined safe speed. SOLUTION: In a mobile agricultural machine capable of traveling shifting by a main shift lever 1 capable of operating a main shift to a moving speed S and an auxiliary shift lever 2 capable of an auxiliary shift operation, the main shift lever 1 and an auxiliary shift lever 2 are provided. Are provided with cams 3 and 4 that can rotate together, and the main transmission lever 1
Is moved to the position of the moving speed S, a stopper 5 interlocked with the movement of the main speed change lever 1 is attached to the cam 4 of the auxiliary speed change lever 2 so that the auxiliary speed change lever 2 cannot be operated at a speed higher than the minimum speed S _1. In addition to being engaged, the movement of the sub-transmission lever 2 is controlled so that the main transmission lever 1 cannot be moved to the position of the moving speed S when the sub-transmission lever 2 is put in a position other than the position of the lowest speed S _1. The interlocking stopper 6 is provided so as to be engageable with the cam 3 of the main shift lever 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safe traveling operating device for a mobile agricultural machine, which is operable to perform a main traveling and a sub shifting for safe traveling.

[0002]

2. Description of the Related Art Conventionally, in a mobile agricultural machine capable of traveling speed change by a main speed change lever capable of operating a main speed change to a moving speed and a sub speed change lever capable of a sub speed change operation, for example, a special application already filed by the present applicant. As can be seen from Japanese Patent Application No. 7-145314, the main shift lever and the sub shift lever can be freely operated.

[0003]

However, when the sub-transmission lever is set to the maximum speed position of the sub-transmission and the main transmission lever is set to the moving speed position, the aircraft can travel at the maximum speed and the speed is reduced. If it is pushed out too much, there is a problem that the aircraft is likely to tip over or collide with other things, which is dangerous.

[0004]

SUMMARY OF THE INVENTION The present invention solves such a problem and makes it possible to effectively operate the vehicle so that the vehicle cannot run at a speed higher than a predetermined safe speed. In a mobile agricultural machine in which traveling speed can be changed by a main speed change lever and an auxiliary speed change lever that can perform an auxiliary speed change operation, each of the main speed change lever and the auxiliary speed change lever is provided with a cam that can rotate integrally with the main speed change lever and the auxiliary speed change lever. A stopper interlocking with the movement of the main shift lever is provided so as to be engageable with the cam of the sub shift lever so that the sub shift lever cannot be operated at a speed higher than the minimum speed when the shift lever is moved to the moving speed position. If the sub-shift lever is moved to a position other than the lowest speed position, the movement of the sub-shift lever is controlled so that the main shift lever cannot be moved to the moving speed position. It is a stopper linked to those constructed by providing to engage the cam of the main speed change lever.

[0005]

Therefore, when the main gear shift lever is moved to the moving speed position, the stopper interlocking with the movement of the main gear shift lever engages with the cam of the sub gear shift lever, thereby operating the sub gear shift lever at a speed higher than the minimum speed. It will not be possible, and if the auxiliary transmission lever is put in a position other than the lowest speed position,
The stopper linked to the movement engages with the cam of the main speed change lever, and the main speed change lever cannot be moved to the moving speed position. The mobile agricultural machine can be safely driven at a predetermined minimum speed that is the position of the moving speed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing a riding rice transplanter which is a mobile agricultural machine, and this machine A is equipped with both front wheels 7, both rear wheels 8, a handle 9, a seat 10 and the like. The planting section B, which is connected to the rear of the machine A via a link mechanism 11, is equipped with a seedling table 12, a plurality of rotary type planting claws 13, a plurality of floats 14, etc., and a hydraulic cylinder 15 of the machine A. The planting part B can be moved up and down in the same manner as in the conventional structure.

A rear cover 1 on the left side of the seat 10
On the upper surface of 6, there is provided a main gear shift guide member 18 into which the main gear shift lever 1 which can be rotated about the operation shaft 17a is fitted. The main gear shift guide member 18 has the main gear shift guide member 18 shown in FIGS.
As shown in, the neutral N position and the moving speed S position of the main shift are set in the front part, and the seedling joint P position, the neutral N position and the reverse R position are set in the rear part, respectively, and the main speed change lever 1 is set. It is constructed in the same way as the conventional type so that it can be moved to each position and operated.

Further, on the upper surface of the rear cover 16 on the right side of the seat 10, there is an auxiliary shift guide mechanism 19 in which an auxiliary shift lever 2 which is a planting work lever which can be rotated around the operation shaft 17b is fitted. As shown in FIGS. 3 and 6, the auxiliary shift guide structure 19 is provided with the position of the minimum speed S ₁ and the maximum speed S ₂ of the auxiliary shift in the front part and the planted clutch in the middle part. The position of turning on and off of the
It is constructed in the same manner as the conventional type so that the lowering and raising positions of the elevation can be set and the auxiliary transmission lever 2 can be operated by moving to each position.

The main shift lever 1 and the sub shift lever 2
The bosses 20 and 21 of the fan-shaped cams 3 and 4 are fitted and fixed to the portions of the operation shafts 17a and 17b that are in the vicinity of, respectively. 4a and low step surfaces 3b, 4b lower than the tip thereof
Form each.

A single support shaft 22 whose both ends are located above the cams 3 and 4 is horizontally mounted on the machine frames 23a and 23b so as to be freely rotatable, and fitted and fixed to one end of the support shaft 22. Boss 24
An end portion of a pin stopper 6 that can abut the outer circumferential arc of the cam 3 is fixed to the lower end portion of the arm 25 that is heavier provided, and the arm 2 is provided in front of and behind the arm 25.
Stoppers 26a, 2 capable of restricting the rotation of 5
6b is installed on the machine frame 23a, and the lower end portion of the dogleg-shaped arm 28 that is placed over the boss 27 fitted and fixed to the other end portion of the support shaft 22 can abut on the outer circumferential arc of the cam 4. An end portion of the pin stopper 5 is fixed, and a tension spring 30 for elastically biasing the stopper 5 to the rear side is connected to the tip of an arm 29 extending above the boss 27.

Therefore, when the main speed change lever 1 is rotated in the arrow A direction and brought to the position of the moving speed S during traveling on the road as shown in FIG. 5, the main speed change lever 1 moves in the arrow A direction. The stopper 6 rides on the high-level surface 3a of the cam 3 which is rotated in the direction of the arrow, and the arm 25 is rotated in the direction of arrow B, and the support shaft 22 which rotates together with the arm 25 moves the other arm 28. At the same time, the stopper 5 is rotated in the direction of arrow B as shown in FIG.
Comes into contact with the low-step surface 4b of the cam 4, and even if the sub gear shift lever 2 is operated from the position of the lowest speed S _{1 to} the position of the highest speed S ₂ as shown by the arrow C, as shown in FIG. , The step portion of the front portion of the high step surface 4a of the cam 4 abuts on the stopper 5, and the arm 25 abuts on the stopper 26a, so that the stopper 5 is locked and the auxiliary transmission lever 2 Cannot be operated.

Further, the position sub shift lever 2 with the exception of the position of the lowest speed S _1, as shown in FIG. 7, for example, are placed in a position of maximum speed S _2, an arrow D direction by the auxiliary shift lever 2 The stopper 5 rides on the high-step surface 4a of the cam 4 which is rotated in the direction of the arrow so that the arm 28 is rotated in the arrow E direction.
2 rotates the other arm 25 in the arrow E direction at the same time as shown in FIG.
8 is contacted with the low step surface 3b of the cam 3, and even if the main gear shift lever 1 is operated to the position of the moving speed S in the direction of arrow A as shown in FIG. Collides with the stopper 6, and the other stopper 5 is pressed against the high-step surface 4a of the cam 4 and is blocked by the stopper 6, so that the main transmission lever 1
Cannot be operated to the position of the moving speed S.

In addition to the above embodiment, the cam 3,
Micro switches are arranged on the outer circumference of the arc of 4, respectively,
The stoppers 6 and 5 can be engaged and disengaged from the solenoids by the on / off operations of both microswitches so that they can be engaged with the cams 3 and 4, respectively, so that they can be operated in the same manner as in the above embodiment.

[0014]

As described above, according to the present invention, when the main transmission lever 1 is moved to the position of the moving speed S, the stopper 5 interlocked with the movement is engaged with the cam 4 of the auxiliary transmission lever 2. the auxiliary shift lever 2 will not be able to operate in a faster rate than the lowest speed S _1, also when the auxiliary shift lever 2 is placed in a position excluding the position of the lowest speed S _1, a stopper 6 for kinetics to the motion Since the cam 3 of the main speed change lever 1 is engaged, the main speed change lever 1 cannot be operated to the position of the moving speed S, and the auxiliary speed change lever 2 is at the lowest speed S ₁ position. Since the mobile agricultural machine can be run at a predetermined minimum speed that is the position of the moving speed S, it has a feature that it can be suitably implemented as a mobile agricultural machine capable of safe driving.

[Brief description of drawings]

FIG. 1 is a side view showing a riding rice transplanter.

FIG. 2 is a plan view schematically showing a part of FIG.

FIG. 3 is an enlarged plan view showing a part of FIG. 2;

FIG. 4 is a rear view schematically showing a main part of the embodiment of the present invention.

FIG. 5 is a side view schematically showing a part of FIG.

FIG. 6 is a side view schematically showing a part of FIG.

FIG. 7 is a side view showing the operating state of FIG.

FIG. 8 is a side view showing the operating state of FIG.

[Explanation of symbols]

1 Main gear shift lever S Moving speed 2 Auxiliary gear shift lever S ₁ Lowest speed 3,4 Cam 5,6 Stopper

Claims (1)

[Claims] 1. A mobile agricultural machine in which a main gear shift lever 1 capable of operating a main gear shift to a moving speed S and a sub gear shift lever 2 capable of a sub gear shift operation allows traveling gear shifting, wherein the main gear shift lever 1 and the sub gear shift lever are provided. The main shift lever 1 is provided with cams 3 and 4 that can rotate together as a unit.
Is moved to the position of the moving speed S, a stopper 5 interlocked with the movement of the main speed change lever 1 is attached to the cam 4 of the auxiliary speed change lever 2 so that the auxiliary speed change lever 2 cannot be operated at a speed higher than the minimum speed S _1. In addition to being engaged, the movement of the sub-transmission lever 2 is controlled so that the main transmission lever 1 cannot be moved to the position of the moving speed S when the sub-transmission lever 2 is put in a position other than the position of the lowest speed S _1. A safe traveling operation device comprising a stopper 6 which is interlocked with the cam 3 of the main shift lever 1 so as to be engageable with the cam 3.