Abstract

A synchronization and engagement device for a gear transmission of a motor vehicle is provided with: a cylindrical hollow portion, which is fixed and coaxial with respect to a shaft of the gear transmission; a toothed driving ring, fixed to an idle or neutral gear of the gear transmission; a first conical friction surface, carried by one between the driving ring and the gear; a floating toothed synchronizing ring, which has a second conical friction surface mating with the first conical surface; and at least one engagement member, which is angularly fixed with respect to the cylindrical hollow portion, is able to slide axially under the action of a control device, and has a cylindrical toothing, designed to render the cylindrical hollow portion angularly fixed with respect to the driving ring. The engagement member is located in a radial position that is more internal with respect to the conical friction surfaces, whilst the cylindrical toothing of the engagement member is an external toothing.

IPC Classes  ?

• F16H 3/38 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with synchro-meshing
• F16D 11/00 - Clutches in which the members have interengaging parts

Abstract

A transmission unit for a motor vehicle is provided with a fixed supporting structure, a driving transmission shaft and at least one driven transmission shaft that are parallel to one another, and a control device, which has a control member that is movable with respect to the supporting structure; the control member is able to translate along a control axis between a plurality of operating positions, each associated to a corresponding range of gears, and to turn, in each operating position, about the control axis between an idle angular position and at least one engagement angular position, in which it controls engagement of a gear forming part of the range selected; the control member is set at least in part in front of an axial end of the transmission shafts.

IPC Classes  ?

• F16H 63/30 - Constructional features of the final output mechanisms

Abstract

A differential assembly, in particular for motor vehicles, transmits the motion from an input shaft to a pair of reciprocally counterposed coaxial output shafts and is provided with a ring gear rotably fed in use by the input shaft about a rotation shaft; the assembly being further provided with a gear set transmitting the motion from the ring gear to the output shafts and having a satellite gear carrier pin, whose axis is orthogonal to the axis of rotation of the ring gear; a single leaf spring is abuttingly coupled to two satellite gears to automatically adjust the position of the satellite gears themselves.

IPC Classes  ?

• F16H 48/06 - Differential gearings with gears having orbital motion

Abstract

A transmission assembly of a motor vehicle is provided with a gearbox having a motion output shaft, whose end 5 carries, in fixed position, a sprocket wheel, coupled to the crown of a differential to transmit motion from the gearbox to the drive wheels; a drive chain or belt transmits motion from the sprocket wheel to the crown, making the output shaft and the crown turn in the same 10 rotation direction; the crown and the sprocket wheel (5) are interchangeable with a toothed crown and a gear directly meshing with the same transmission ratio.

IPC Classes  ?

• F16H 48/06 - Differential gearings with gears having orbital motion
• B60K 17/16 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of differential gearing

Abstract

A synchronization and engagement device (1) for a gear transmission (2) of a motor vehicle is provided with: a cylindrical hollow portion (18), which is fixed and coaxial with respect to a shaft (3) of the gear transmission; a toothed driving ring (44), fixed to an idle or neutral gear (9) of the gear transmission (2); a first conical friction surface (47), carried by one (9) between the driving ring and the gear; a floating toothed synchronizing ring (39), which has a second conical friction surface (40) mating with the first conical surface (47); and at least one engagement member (54), which is angularly fixed with respect to the cylindrical hollow portion (18), is able to slide axially under the action of a control device (16), and has a cylindrical toothing (55), designed to render the cylindrical hollow portion (18) angularly fixed with respect to the driving ring (44). The engagement member (54) is located in a radial position that is more internal with respect to the conical friction surfaces (40, 47), whilst the cylindrical toothing (55) of the engagement member (54) is an external toothing.

IPC Classes  ?

• F16D 23/06 - Arrangements for synchronisation with an additional friction cluch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
• F16H 63/30 - Constructional features of the final output mechanisms

Abstract

A transmission unit (2) for a motor vehicle is provided with a fixed supporting structure (20), a driving transmission shaft and at least one driven transmission shaft that are parallel to one another, and a control device (16), which has a control member (110) that is movable with respect to the supporting structure (20); the control member (110) is able to translate along a control axis (111) between a plurality of operating positions, each associated to a corresponding range of gears, and to turn, in each operating position, about the control axis (111) between an idle angular position and at least one engagement angular position, in which it controls engagement of a gear forming part of the range selected; the control member (110) is set at least in part in front of an axial end (6) of the transmission shafts.

IPC Classes  ?

• F16H 63/20 - Multiple final output mechanisms being moved by a single common final actuating mechanism with preselection and subsequent movement of each final output mechanism by movement of the final actuating mechanism in two different ways, e.g. guided by a shift gate
• F16H 63/30 - Constructional features of the final output mechanisms

Abstract

A differential assembly (1), in particular for motor vehicles, transmits the motion from an input shaft (4) to a pair of reciprocally counterposed coaxial output shafts (7) and is provided with a ring gear (11) rotably fed in use by the input shaft (4) about a rotation shaft (13) ; the assembly being further provided with a gear set (33) transmitting the motion from the ring gear (22) to the output shafts (7) and having a satellite gear carrier pin (36), whose axis (37) is orthogonal to the axis of rotation (13) of the ring gear (11) ; a single leaf spring (50) is abuttingly coupled to two satellite gears (34) to automatically adjust the position of the satellite gears (34) themselves.

IPC Classes  ?

• F16H 48/08 - Differential gearings with gears having orbital motion with orbital conical gears
• F16H 57/12 - Arrangements for adjusting or for taking-up backlash not provided for elsewhere