US 5,690,001 A · Transmission assembly for tractors

Abstract

A bearing support frame (4) is disposed within a rear end portion of a tractor front housing (1) and is fixedly supported by this housing which has an internal partition wall (1a) and an open rear end. An additional speed change mechanism (12) having plural fluid-operated clutches (54F, 54R) mounted on a primary shaft (7) of a high level which extends through the partition wall is disposed within a rear half of the front housing such that it is operable to perform a speed change transmission between the primary shaft and a co-axial output shaft (10) supported by the support frame. Fluid supply passages (55F, 55R, 55L) in the primary shaft are connected to fluid supply passages (61F, 61R, 61L) in the partition wall through annular fluid chambers (60F, 60R, 60L) defined between the primary shaft and a hollow cylindrical portion (37) of the partition wall. A control valve assembly (63) supported by the front housing extends through a side wall of this housing and includes a directional control valve (78), pressure-reducing valve (83), modulating relief valve (86), and lubricant regulator valves (90, 91).

Claims25

Dependent claims

A transmission assembly for tractors which comprises:

a front housing (1) including an open rear end;
a first speed change mechanism (12) disposed within said front housing (1);
a transmission casing (2) including an open front end and being fastened to the rear end of said front housing (1);
a second speed change mechanism (15) disposed within said transmission casing (2), said second speed change mechanism being connected to said first speed change mechanism (12) such that said second speed change mechanism is powered by said first speed change mechanism;
and
a bearing support frame (4) disposed within a rear end portion of said front housing for supporting a rear end portion of said first speed change mechanism (12), said bearing support frame being fixedly secured to said front housing (1) using bolts (35) each having a head portion which is located within a front end portion of said transmission casing (2).

3 more elements

A transmission assembly for tractors which comprises:

a front housing (1) including an open rear end;
a first speed change mechanism (12) disposed within said front housing (1);
a transmission casing (2) including an open front end and being fastened to the rear end of said front housing (1);
a second speed change mechanism (15) disposed within said transmission casing (2), said second speed change mechanism being connected to said first speed change mechanism (12) such that said second speed change mechanism is powered by said first speed change mechanism;
and
a bearing support frame (4) disposed at a location between said first and second speed change mechanisms (12, 15) for supporting a rear end portion of said first speed change mechanism (12) and for supporting a front end portion of said second speed change mechanism (15), said bearing support frame being fixedly secured to said front housing (1) using bolts (35) each having a head portion which is located within a front end portion of said transmission casing (2).

3 more elements

A transmission assembly for tractors which comprises:

a front housing (1) including an open rear end;
a first speed change mechanism (12) disposed within said front housing (1);
a transmission casing (2) including an open front end and being fastened to the rear end of said front housing (1);
a second speed change mechanism (15) disposed within said transmission casing (2), said second speed change mechanism being connected to said first speed change mechanism (12) such that said second speed change mechanism is powered by said first speed change mechanism;
and
a bearing support frame (4) disposed within a rear end portion of said front housing (1) for supporting a rear end portion of said first speed change mechanism (12), said bearing support frame including outwardly extending integral projections (4a) which are adapted to abut against bosses (1b) projected inwardly from a rear end portion of said front housing, said projections being fixedly secured to said bosses (1b) using bolts (35) each having a head portion which is located within a front end portion of said transmission casing (2).

3 more elements

A transmission assembly for tractors which comprises:

a front housing (1) including an open rear end;
a first speed change mechanism (12) disposed within said front housing (1);
a transmission casing (2) including an open front end and being fastened to the rear end of said front housing (1);
a second speed change mechanism (15) disposed within said transmission casing (2), said second speed change mechanism being connected to said first speed change mechanism (12) such that said second speed change mechanism is powered by said first speed change mechanism;
and
a bearing support frame (4) disposed at a location between said first and second speed change mechanism (12, 15) for supporting a front end portion of said first speed change mechanism (12) and for supporting a front end portion of said second speed change mechanism (15), said bearing support frame including outwardly extending integral projections (4a) which are adapted to abut against bosses (1b) projected inwardly from a rear end portion of said front housing, said projections being fixedly secured to said bosses (1b) using bolts (35) each having a head portion which is located within a front end portion of said transmission casing (2).

3 more elements

Dependencies are inferred from the claim text.

Transmission assembly for tractors

Life of this patent

Transmission assembly for tractors

Life of this patent

Abstract

Claims25