Traveling agricultural machine

Abstract

A riding rice transplanter as an example of traveling agricultural machines has a traveling body (2) supported by wheels (5, 6), an engine (7) mounted on the traveling body (2), a traveling transmission (8) for changing the speed of the engine (7) and transmitting the changed speed to the wheels (5, 6), and a shift pedal (12) for controlling the traveling transmission. The rotational speed of the engine (7) is controlled by an accelerator lever (7a). The shift pedal (12) and the accelerator lever (7a) are interlocked by a cam means (37). When the shift pedal (12) is depressed, the rotational speed of the engine (7) is increased, and when the shift pedal (12) is returned, the rotational speed of the engine (7) is decreased. When the engine (7) is set to a high rotational speed range at the beginning of the depression of the shift pedal (12) and then gradually accelerated, smooth operability of traveling, good working efficiency, and high-speed operation of the rice transplanter are realized with quietness and fuel cost saving of the rice transplanter when the rice transplanter is at a stop achieved.

Description

technical field [0001] The present invention relates to traveling agricultural machines such as riding rice transplanters and riding tractors. Background technique [0002] It goes without saying that in the riding type rice transplanter, a rice transplanting device is attached to the rear of the traveling body on which the engine is mounted. In addition, the tractor is equipped with a working device such as a cultivating device at the rear of a traveling body on which an engine is mounted. In traveling agricultural machines such as these riding rice transplanters and riding tractors, the traveling speed can generally be changed. The change method of the travel speed of traveling agricultural machinery is roughly divided into a step-by-step method, which is switched by a manual joystick, and a stepless method, which is adjusted by the amount of depression of a foot-operated pedal installed on the floor of the traveling machine. two kinds. [0003] In patent document 1, an...

AI Technical Summary

Problems solved by technology

[0007] Therefore, in Patent Document 1, when the rotation speed of the engine is set at a low speed such as idling rotation for the sake of quietness and fuel saving, etc., even if the shift pedal is depressed, it is difficult to accelerate to the point where a predetermined power is obtained. state, however, when set to rapid acceleration, it cannot travel smoothly, and the operability deteriorates significantly

[0008] On the other hand, when it is set to obtain the prescribed travel speed immediately when the shift pedal is stepped on, the engine speed must be set relatively high in the state of a stop without stepping on the shift pedal. The rotation speed of the motor is reduced to low speed rotation such as idling rotation, so quietness cannot be ensured, and at the same time, the purpose of saving fuel cannot be achieved.

[0009] That is, there is a demand that, preferably, in traveling agricultural machines such as riding rice transplanters, the speed change pedal needs to move to a certain extent so that the speed of the vehicle does not change suddenly due to a slight movement of the speed change pedal. , a large power is required, and the engine is rotated at a low speed as much as possible when the travel is stopped. However, in Patent Document 1, these requirements cannot be satisfied at the same time.

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