Abstract This invention relates to automatic transmissions for vehicles, and particularly to transmissions which consist of a planetary gear train, a hydrodynamic torque-converter and a differential, the mechanism being housed in a main housing and the converter being housed in a second housing, these housings being separable along a plane perpendicular to the axis of rotation of the gear train: such transmissions also incorporate braking and clutch members including friction discs which are controlled by rams which co-operate with the components of the planetary gear train, and a pump is provided to supply said ram for controlling the braking and clutch methods. In accordance with the invention, the said main housing of the mechanism contains a detachable partition and bearing support having a front face which is directed towards the converter housing, and a rear face which forms a contact surface for friction discs included in the braking member and for return members of a piston of a ram means which controls said braking member.
In an automatic vehicle transmission of the kind comprising of a planetary gear train transmission mechanism, a hydrodynamic torque-converter, a differential, a main housing for said mechanism and a main housing for said converter these latter being separable along a plane perpendicular to the axis of rotation of said gear train, braking and clutch members including friction discs which are controlled by ram means which co-operate with the components of said planetary gear train, and a pump to supply said ram means, the improvement wherein said main housing contains a detachable partition and bearing support having a front face which is directed towards said converter housing, and a rear face which forms a contact surface for said friction discs included in said braking member and for return members of a piston of said ram means.
Claim 2
Dependent Claim
135 words
In an automatic vehicle transmission of the kind comprising of a planetary gear train transmission mechanism, a hydrodynamic torque-converter, a differential, a main housing for said mechanism and a main housing for said converter these latter being separable along a plane perpendicular to the axis of rotation of said gear train, braking and clutch members including friction discs which are controlled by ram means which co-operate with the components of said planetary gear train, and a pump to supply said ram means, the improvement wherein said main housing contains a detachable partition and bearing support having a front face which is directed towards said converter housing, and a rear face which forms a contact surface for said friction discs included in said braking member and for return members of a piston of said ram means.
Claim 3
Dependent Claim
38 words
A transmission according to claim 1, wherein said detachable partition is recessed, and in said recess are arranged co-axial components of said transmission mechanism, said components being situated at increasing distances from the longitudinal axis of said mechansim.
Claim 4
Dependent Claim
79 words
A transmission according to claim 2, wherein said planetary gear train includes a ring gear arranged in said recess in said partition, said ring gear being carried by an output pinion of said mechanism which turns on a sleeve which latter forms a bearing for the forward-sun-gear of said planetary gear train, said forward-sun-gear meshing with a set of planetary gears, said sleeve being mounted directly in a cover of a pump which is fixed to said converter housing.
Claim 5
Dependent Claim
25 words
A transmission according to claim 1, wherein said partition contains a bearing in which a shaft of an intermediate transmission pinion is mounted to rotate.
Claim 6
Dependent Claim
31 words
A transmission according to claim 1, wherein said main housing has a single assembly and sealing joint lying in the junction plane between said housings for said converter and said mechanism.