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.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a supporting structure of an oil pump that is disposed apart from an input shaft of an automatic transmission. [0003] 2. Description of the Prior Art [0004] Conventionally, as an oil pump for an automatic transmission, there has been known an oil pump that is disposed apart from an input shaft and driven by rotation of the input shaft via a chain that connects a drive sprocket connected to a pump impeller of the torque converter and a driven sprocket provided in the oil pump. [0005] In a supporting structure of such an oil pump, an end face of the oil pump on a side opposite to the side on which the driven sprocket is provided is connected to a transmission case, and the side of the oil pump on which the driven sprocket is provided is fixed by inserting a pump shaft into a hole of a pump holder connected to the transmission case. [0006] Such an oil pump supporting structure is disclo...

AI Technical Summary

Benefits of technology

[0009] It is therefore an object of the present invention to provide an oil pump supporting structure that prevents vibration and noise of an oil pump.

[0011] According to the present invention, since the partition member and the oil pump are fixed to each other by the pump holding member, vibration of the oil pump in the direction of tension of the chain acting when the oil pump is driven can be suppressed to reduce vibration noise.

Problems solved by technology

In the above oil pump supporting structure, however, the oil pump is positioned and fixed by inserting the shaft of the oil pump into the hole of the pump holder, but the process for mounting the oil pump is complicated, and the pump holder must be larger than at least the outer circumference of the pump shaft, making structure large and heavy.

Further, the oil pump cannot be reliably positioned with respect to the rotation direction of the chain, and hence the oil pump is twisted in the same direction as the rotation direction of the driven sprocket, causing vibration and noise.

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