To provide an engine drive type-grass mower capable of travelling while mowing grass along a contour line on a slope surface with a high degree of precision.SOLUTION: A grass mower includes: an engine; an inclination angle calculation unit 71 for calculating an inclination angle of a machine body with respect to a contour line of a slope surface; a travelling device having a left travelling unit and a right travelling unit; a travelling state determination unit 73 for determining whether the grass mower is in a straight travelling state in which it is travelling on the slope surface, in an unstable straight travelling state in which it is deflected from the straight travelling state, or in a state of turning operation; a transmission having a left transmission for transmitting shift power to the left travelling unit and a right transmission for transmitting shift power to the right travelling unit; and a speed change control unit 60 for adjusting a speed change radio of the transmission. The speed change control unit 60 includes a straight travelling holding function for adjusting the speed change ratio of the left transmission and the speed change ratio of the right transmission on the basis of the inclination angle for shifting from the unstable straight travelling state to the straight travelling state.SELECTED DRAWING: Figure 7

    【課題】法面における等高線に沿った草刈り走行が精度よく行われるエンジン駆動式の草刈機を提供する。【解決手段】草刈機は、エンジンと、法面の等高線に対する機体の傾斜角を算出する傾斜角算出部71と、左走行ユニットと右走行ユニットとを有する走行装置と、法面を走行中の直進走行状態であるか、直進走行状態から偏向した不安定直進走行状態であるか、あるいは旋回走行状態であるかを判定する走行状態判定部73と、左走行ユニットに変速動力を伝達する左変速装置及び右走行ユニットに変速動力を伝達する右変速装置を有するトランスミッションと、トランスミッションの変速比を調節する変速制御部60とを備える。変速制御部60は、不安定直進走行状態から直進走行状態に移行するように、傾斜角に基づいて、左変速装置の変速比と右変速装置の変速比とを調節する直進走行保持機能を有する。【選択図】図7


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    Title :

    GRASS MOWER


    Additional title:

    草刈機


    Contributors:

    Publication date :

    2023-07-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    A01B SOIL WORKING IN AGRICULTURE OR FORESTRY , Bodenbearbeitung in Land- oder Forstwirtschaft / A01D Ernten , HARVESTING / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B62D MOTOR VEHICLES , Motorfahrzeuge



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