Multiple disc clutch for automatic transmission

Abstract

This invention provides a multiple disc clutch for an automatic transmission, reducing the total length of the automatic transmission by reducing the thickness of each of a piston and a spring retainer and eliminating the need for existing D-ring assembling processes. The multiple disc clutch for the automatic transmission comprises a plurality of clutch plates provided on a retainer movably in the lateral direction, clutch discs located in gaps between the clutch plates and connected to a hub, the spring retainer provided between the retainer and the hub and positionally fixed to the piston to be slidably moved on the retainer, and a spring provided on the spring retainer for elastically supporting the piston. A lip seal is bonded between the outer peripheral faces of the piston and the spring retainer.

Description

technical field [0001] The present invention relates to a multi-plate clutch of an automatic transmission, and particularly relates to a multi-plate clutch of an automatic transmission whose overall length can be reduced. Background technique [0002] The multi-plate clutch is composed of multiple clutch plates and clutch discs, and the friction between them is used to transmit power. In the automatic transmission, low-speed clutches, overrunning clutches, reversing clutches, etc. are used to combine the power transmitted from the torque converter. The control is set in the desired gear. [0003] The so-called pistons and spring retainers used in multi-plate clutches are mainly cast aluminum products, and the minimum thickness to meet the required strength is thick, which is the main reason for increasing the overall length of the automatic transmission. [0004] Therefore, in the actual situation that the output of the engine is slowly increasing, when an automatic transmi...

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Problems solved by technology

[0004] Therefore, in the actual situation that the output of the engine is slowly increasing, when an automatic transmission that allows an increase in the torque capacity is manufactured in accordance with the engine specification, its overall length will increase, and in this case, it cannot be installed in the Problems maintaining engine compartments to existing design specifications

[0005] And because the D-shaped ring arranged on the piston and the spring retainer is manufactured and assembled separately from the piston and the spring retainer, the number of assembly processes on the automatic transmission assembly line is increased, which has also become a disadvantage.

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