Operating device for a working vehicle

A - Human Necessities – 01 – B

Patent

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Details

A01B 63/10 (2006.01) B60K 20/00 (2006.01) B60K 26/00 (2006.01) E02F 9/20 (2006.01) F16H 59/02 (2006.01) B60K 17/10 (2006.01) B60K 25/00 (2006.01) F16H 59/08 (2006.01) F16H 61/70 (2006.01)

Patent

CA 2229819

One operating lever is provided for moving a travelling vehicle with an attached working machine back and forth and the working machine vertically and operating a sub-transmission. A sub-transmission switch is provided in a recessed portion formed in a grip of a back-and-forth operating lever so that quick operation can be effected by a single hand without any mistake. In addition, the working-machine vertically-moving lever is constructed so as to interlock with a spool of a vertical motion control valve via a motor so, that the speed of the motor is gradually reduced when the working-machine vertically-moving lever is in a lowering operation, thereby preventing a drastic lowering.

Dans cette invention, un levier d'actionnement permet d'effectuer le déplacement en avant et en arrière d'un véhicule comportant un outil de travail, le déplacement vertical dudit outil de travail, ainsi que l'actionnement d'un système de sous-transmission. Un commutateur (37) de sous-transmission est monté dans une partie renfoncée (30b) de la poignée (30a) du levier d'actionnement avant-arrière (30), de manière à pouvoir effectuer une opération rapide et sans erreur à l'aide d'une seule main. En outre, le levier (32) assurant le déplacement vertical de l'outil de travail est conçu de manière à entrer en interconnexion avec le tiroir d'un clapet de commande de déplacement vertical par l'intermédiaire d'un moteur électrique, ceci de manière à ce que la vitesse de ce dernier diminue progressivement lorsque ledit levier (32) effectue une opération d'abaissement. Ce système permet ainsi d'éviter un abaissement trop brusque.

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