Oil pump supporting structure of automatic transmission

Abstract

There is provided an oil pump supporting structure which can prevent vibration and noise of an oil pump. A pump holding member is disposed in substantially parallel with the tensioning direction of a chain, for connecting a partition member and the oil pump to each other. As a result, vibration occurring in the tensioning direction of the chain when the oil pump is driven can be suppressed to reduce vibration noise.

1 . An oil pump supporting structure of an automatic transmission, comprising: 
 a chain that connects a drive sprocket attached to a rotary member and a driven sprocket attached to a rotary shaft of an oil pump so that an oil pump is driven by rotation of the drive sprocket;    a partition member that supports the rotary member inside a path of said chain; and    a pump holding member that connects said partition member and the oil pump to each other on a side on which the driven sprocket of the oil pump is mounted,    wherein a line that connects a point of connection between said pump holding member and the oil pump and a point of connection between said pump holding member and said partition member is substantially parallel with a direction of tension of said chain acting when the oil pump is driven.    
     
     
         2 . An oil pump supporting structure of an automatic transmission according to  claim 1 , wherein the point of connection between said pump holding member and the oil pump is away from the rotary shaft of the oil pump.  
     
     
         3 . An oil pump supporting structure of an automatic transmission according to  claim 1 , wherein on a side that abuts on the oil pump and said partition member, said pump holding member holds harnesses extended from a sensor provided on the partition member inside the path of said chain, so that the harnesses can be drawn out of the path of said chain.  
     
     
         4 . An oil pump supporting structure of an automatic transmission according to  claim 1 , wherein: 
 an end face of the oil pump on a side opposite to a side on which said driven sprocket is provided is attached to a transmission case; and    a side of the oil pump to which external force in such a direction as to pull the oil pump from the transmission case is applied due to tension of said chain acting when the oil pump is driven is fixed to the transmission case by inserting a bolt from the transmission case into threads formed at a location away from the rotary shaft of the oil pump.    
     
     
         5 . An oil pump supporting structure of an automatic transmission according to  claim 1 , wherein the oil pump comprises a vane type oil pump.