Breather device for speed-change devices

In a breather device linking a space within a transmission case to outside air, a breather is provided at a middle position in a lengthwise direction on an upper portion of the transmission case, in particular, at a position displaced in an axial direction from a middle position in the lengthwise di...

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Bibliographic Details
Main Authors Okuno, Mitsutaka, Hayabuchi, Masahiro, Nishida, Masaaki, Kasuya, Satoru, IKe, Nobukazu
Format Patent
LanguageEnglish
Published 13.05.2008
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Summary:In a breather device linking a space within a transmission case to outside air, a breather is provided at a middle position in a lengthwise direction on an upper portion of the transmission case, in particular, at a position displaced in an axial direction from a middle position in the lengthwise direction, and opens to outside air via a ventilating mechanism that extends in a direction opposite this displaced direction. Thus, through the combination of displacement in a lengthwise direction of the position of the breather with respect to a middle portion in a lengthwise direction of the transmission case and the direction of the ventilating mechanism facing in a direction opposite that direction, the occurrence of breather blow is prevented during both forward and rearward axis tilting of the transmission by an action where a forward side of the ventilating mechanism lowers when,the position of the breather tilts in a direction away from the oil level, and conversely, where the forward side of the ventilating mechanism rises when the position of the breather tilts in a direction towards the oil level.