JPH0646617A - Device for operating speed change of traveling, working machine in paddy field - Google Patents

Abstract

PURPOSE:To check speed change from an operation speed to a movement speed but to make handling from the movement speed to the operation speed free. CONSTITUTION:A device for operating speed change of a traveling, working machine in paddy field is equipped with a handling tool 31 capable of changing a speed between an operation speed and a movement speed higher than the operation speed and a speed change checking means 37 of the handling tool 31. An engaging part between the handling tool 31 and the speed change checking part 37 is equipped with a gearing means 42 for checking manipulation of the handling tool 31 from the operation speed to the movement speed and not checking manipulation of the handling tool 31 from the movement speed to the operation speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed change operation device for a paddy field working machine, and is used for a riding rice transplanter, a walk type rice transplanter, a flooded direct seeder, and the like.

[0002]

2. Description of the Related Art For example, in a rice transplanter as a paddy traveling working machine, a planting speed (working speed), a road speed (moving speed) and a reverse speed are set in a main speed change section, and the speed change (speed change) is performed. The gear is changed by sliding the shift gear by a gear changeover operation of a gear shift lever (operation tool) provided in the control section.

In this gear shift operation device, conventionally, a shift control means by manual switching is provided in order to prevent an operating tool from accidentally entering from the working speed to the moving speed at the time of work, conventionally at the time of work. It was provided.

[0004]

In the prior art, even when the operating tool is moved from the moving speed to the working speed,
This was a very troublesome work because the shift control means had to be manually released each time. Therefore, the present invention is a shift operating device for a paddy traveling work machine, which includes an operating tool 31 capable of shifting between a working speed and a moving speed higher than the working speed, and a shift control means 37 for the operating tool 31. Thus, the shift operation from the working speed to the moving speed of the operating tool is restrained, while the shift operation from the moving speed to the working speed is made free so that the artificial releasing operation of the restraining means can be omitted. And

[0005]

According to the present invention, there is provided a manipulator 31 capable of shifting gears between a working speed and a moving speed higher than the working speed, and a shift control means 37 for the manipulator 31 to drive a paddy field. A gear shift operating device for a working machine, which has the following technical means in order to achieve the above-mentioned object. That is, the present invention, in the engaging portion of the operation tool 31 and the shift restraint means 37,
It is characterized in that it is provided with an engagement means 42 for restraining the operation of the operating tool 31 from the working speed to the moving speed and for not restraining the operation of the operating tool 31 from the moving speed to the working speed.

[0006]

When the planting work is performed in the paddy field, the operation tool 31 is set at the planting speed (working speed) position. The set operation tool 31 restrains the engagement restraint 42 from unexpectedly shifting from the working speed to the moving speed with respect to the shift restraint means 37.

On the other hand, when the operating tool 31 is operated from the moving speed to the working speed, the gear shift restraint means 37 is automatically released from the restraint by the engagement means 42, and the artificial restraint release can be omitted here.

[0008]

[Embodiment] In FIG. 7, a paddy field traveling working machine 1 to which the present invention is applied is illustrated as a riding rice transplanter, and a pair of left and right front wheels is used.
An engine 5 is mounted on the entire traveling body 4 equipped with 2 and a pair of left and right rear wheels 3. The power of the engine 5 is linked to the power transmission system in the mission case 7 via the belt type continuously variable transmission 6, and in the middle of the traveling vehicle body 4,
A control section 10 including a control handle 8 and a seat 9 is provided, and a seedling planting device 13 is movably connected to the rear of the control section 10 via a lift cylinder 11 and a lift link mechanism 12.

In FIG. 8, the power from the engine 5 is transmitted to the input shaft 15 of the transmission case 7 via the belt type continuously variable transmission 6 and the front wheels via the first and second transmission shafts 16 and 17.
It is transmitted to the input gear 19 of the front wheel differential mechanism 18 for 2.
A shift gear 20 is spline-fitted to the second transmission shaft 17, and a large-diameter gear portion of the shift gear 20 is engaged with a first gear 21 of the first transmission shaft 16 so as to be in a forward second speed state (moving speed, road traveling). Speed) and shift gear 20
The large-diameter gear portion of 3 is engaged with the reverse gear 24 of the third transmission shaft 23 to form the main transmission portion 25 which can obtain the reverse state.

With reference to FIGS. 1 to 3, there is illustrated an embodiment of a gear shift operation means 26 for switching and shifting the shift gear 20 in the main transmission portion 25 to a moving speed, a working speed and a reverse speed. That is, in FIGS. 1 to 3, the U-shaped bracket 28 is fixed to the handle post 27 of the steering handle 8,
A support cylinder 29 is fixed to the bracket 28. A shaft 31A of a gear shift operation lever (operation tool) 31 having a speed change arm 30 is rotatably supported in the support cylinder 29. The operation tool 31 has its grip 31B in the front-rear direction around the support cylinder 29. It can be operated and can be changed to move, plant, or retreat here.

The operation tool 31 is a handle post cover 32.
Grip 31B is located on one side of the. Speed change arm
30 is formed in an L shape in a plan view, the upper end of the speed change rod 33 is pivotally attached to a middle portion thereof via a joint 33A, and the lower end of the speed change rod 33 is pivotally connected to a relay arm 34 via a joint 33B. It is worn.

An intermediate portion of the relay arm 34 is swingably supported by the mission case 7 via a support shaft 35,
The other end (lower end) of the relay arm 34 is engaged with a shifter 36 slidably fitted on a shift bar 35 supported by the mission case 7, and the shifter 36 is engaged with a shift gear 20. Therefore, by operating the operation tool 31 to move, plant (work), or move back, the speed change rod 33,
The shift gear 20 can be shifted via the relay arm 34 and the like, including the moving speed, the working speed, and the reverse speed including neutral.

The handle post 27 is provided with a gear shift restraining means 37, which substantially restrains the gear shift arm 30. Ie handle post
A U-shaped bracket 38 is fixed to the back surface (operator side) of 27, and a rising portion of a check lever 39 having an L shape in a side view is supported by the bracket 38 so as to be rotatable about a vertical axis. Handle post cover 32 opening
Exposed to the operator side from 32A.

A check plate 40 is fixed to the check lever 39, and an unstable switching spring 41 is attached to the check plate 40 and the post.
It is hung over 27. The restraint plate 40 and the shift arm 30 constitute an engaging portion between the operating tool 31 and the shift restraining means 37, and the engaging portion changes the operating speed from the working speed to the moving speed.
Engaging means 42 for restraining the operation of 31 and not restraining the operation of the operating tool 31 from the moving speed to the working speed is provided.

That is, when the check lever 39 is in the check position by the spring 41, and the speed change arm 30 is in the moving position (see FIG. 1 (B)), when the operating tool 31 is operated from the moving position to the working position, the speed changing arm 30 is moved. The cam 43 formed in 30 causes the check plate 40 to escape against the spring 41, shift the shift gear 20 from the moving speed to the working speed without operating the check lever 39, and when the speed change arm 30 passes the check plate 40, The restraint plate 40 is a spring
It returns to the old position by 41, and as shown in FIG.
The shift from the work speed of 30 to the moving speed is designed to be restrained.

Therefore, the switching from the working speed to the moving speed is controlled unless the check lever 39 is artificially retracted (release of check). FIG. 4 shows a second engagement means 42.
An example is shown, in which a stopper 44 of the check lever 39 is provided, and hook portions 45 and 46 are provided on the speed change arm 30 and the check plate 40, respectively.
Is formed, and the others are common to FIGS.

FIG. 5A shows a third embodiment of the engaging means 42, in which the cam 43 is formed on the upper surface side of the check plate 40,
Others are common to FIGS. FIG. 5B shows the engaging means.
42 is a fourth embodiment, in which the boss 40A of the restraint plate 40 is rotatably supported by the restraint lever 39, and the restraint plate 40 is provided with a rotation preventing stopper 40B. When the speed is switched to the working speed, the stopper 40B does not function and the check plate 40 rotates, and then the check plate 40 returns by the spring (not shown), and the stopper 40B causes the speed change arm 30 to move from the working speed to the moving speed. It is a so-called one-way type check plate 40, so to speak.

FIG. 6 shows a fifth embodiment of the engaging means 42,
The check lever 39 is provided on the cover 32 so as to be able to move forward and backward by being urged in the advancing direction by a spring 47, and a cam 43 is provided at the tip of the check lever 39.
Is provided. In addition, in FIG. 8, reference numeral 48 is a front wheel transmission mechanism, which is interlocked with the differential mechanism 18.

The differential mechanism 18 is interlockingly connected to the rear wheel 31 via the steering clutch 49 and the rear wheel transmission mechanism 50. Reference numeral 51 is an inter-stock adjustment unit, which is interlocked with a feed case unit 54 via a safety clutch unit 52 and a planting clutch unit 53, and further, a planting case unit is provided via a zigzag clutch unit 55.
It is linked to 56.

The inter-stock adjustment unit 51 adjusts the inter-stock distance by slidingly switching the shift gear 51A, and the shift gear 51A slides the shifter 57 shown in FIGS. 9 and 10 by an artificial external operation. To be shifted. An operation lever 59 is connected to the shifter 57, and the tip end of the interlocking rod 58 is engaged with the lever 59. The lever 59 can swing about a fulcrum shaft 62 provided near the inspection portion 61 of the battery 60.

The inspection section 61 has an inspection window 63 opened in step 62 and an inspection cover 64 for opening and closing the inspection window 63. The operation lever 59 opens the inspection cover 64 and opens the inspection window.
It can be operated from 63, where inter-strain regulation can easily be performed. In addition, although the thing applied to the riding type rice transplanter was shown in the above-mentioned illustration example, this invention is applicable not only to a walk type rice transplanter, but also to a flooded direct seeder.

Further, the operation tool may be a pedal in addition to the lever.

[0023]

As described above, the present invention is capable of preventing an unexpected shift to a moving speed higher than the working speed while working at a working speed, and at the time of shifting from the moving speed to the working speed, a check control is performed. Since the means does not have to be released, the operation frequency of the operation tool or the like is reduced and the maneuverability is improved.

[Brief description of drawings]

FIG. 1A is a perspective view showing a restrained state of a first embodiment of the present invention, and FIG. 1B is a perspective view of a main part in a non-stamped state.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is a plan view of a main part of the first embodiment.

FIG. 4 is a front view of the main parts of the second embodiment.

5A is a front view of the third embodiment, and FIG. 5B is a perspective view of the fourth embodiment.

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

FIG. 7 is a side view of the riding type rice transplanter.

FIG. 8 is a configuration diagram of a power transmission system.

FIG. 9 is a plan view of a control unit.

FIG. 10 is a cross-sectional view of FIG. 9X-X.

[Explanation of symbols]

 26 Gear change operation means 30 Gear change arm 31 Operation tool 34 Relay arm 37 Checking means 40 Checking board 42 Engaging means 43 Cam

Claims (1)

[Claims] 1. A paddy field working machine comprising an operating tool (31) capable of shifting between a working speed and a moving speed higher than the working speed, and a shift restraining means (37) for the operating tool (31). In the gear shift operating device, the operation part (31) and the gear shift restraining means (37) are engaged with each other to restrain the operation of the manipulation tool (31) from the working speed to the moving speed, and from the moving speed. A gear shifting operation device for a paddy traveling work machine, comprising: an engagement means (42) for restraining the operation of the operation tool (31) to a work speed.