A drive train (10) for driving a motor vehicle has a combustion engine (12) for providing purely mechanical drive for the motor vehicle. A transmission (16) can be coupled to the combustion engine (12) via a shaft unit (14) for transmitting torque between the motor vehicle transmission (16) and the combustion engine (12). A reserve volume (18) is between the combustion engine (12) and the motor vehicle transmission (16) and is penetrated by the shaft unit (14). The reserve volume (18) can accommodate a high-voltage electric machine for purely electric drive of the motor vehicle or a low-voltage electric machine (32) for applying an electrically generated assistance torque to the motor vehicle transmission (16). As a result, a hybrid functionality can be made available to an at least limited degree, with the result that a cost-effective drive train (10) configured for a hybrid motor vehicle is made possible.

A modular transmission system selectively coupled to an electric motor arranged on a vehicle according to a first example of the present disclosure includes a front housing, a first rear housing and a second rear housing. The front housing has a transmission motor mount and at least one transmission chassis mount. The transmission motor mount is configured to mount the front housing relative to the electric motor. The first rear housing has a first gear set. The first rear housing is configured to selectively couple to the front housing to provide first gear ratios in the first modular transmission configuration. The second rear housing has a second gear set. The second rear housing is configured to selectively couple to the front housing to provide second gear ratios in the second modular transmission configuration.

A linear actuator (10) for use in a modular assembly of such actuators comprises an actuator body (11), a shaft (12) guided by the body to be displaceable relative thereto in the sense of the longitudinal axis (13) of the shaft and a drive motor enclosed in the body and operable to axially displace the shaft relative to the body in two mutually opposite directions. The body has two mutually opposite sides (15a, 15b) respectively lying in two substantial parallel spaced-apart planes, which each represent a reference plane for positioning the body side-by-side with the body of another such actuator, and a further side (17b) connecting the two mutually opposite sides and stepped to form a projection (18) receiving the shaft (12) with the axis (13) parallel to the two planes and a rebate (19) beside the projection to permit the body to interlock with the body of another such actuator at that further side. The projection (18) and rebate (19) are of substantially the same width in the sense of the spacing of the two planes and the shaft (12) is disposed substantially centrally of the projection (18) so that when the body (11) is interlocked with that of another such actuator the pitch of the shaft axes (13) is equal to that width.

A gearing assembly for a vehicle drivetrain. The assembly includes a first shaft rotating about a first shaft axis; a second shaft with a second shaft axis parallel to the first shaft axis; a first freewheel clutch gear mounted to the first shaft; a second gear mounted to the first shaft; a third freewheel clutch gear mounted to the second shaft and engaged with the second gear; and a fourth gear mounted to the second shaft and engaged with the first gear. When the first shaft rotational speed is greater than the second shaft rotational speed, the first shaft drives the second shaft via the second and third gear, the first gear being overrun; and when the second shaft rotational speed is greater than the first shaft rotational speed, the second shaft drives the first shaft via the fourth and first gear, the third gear being overrun.

A kit of parts to provide a reconfigurable epicyclic gear system, The kit of parts includes at least one sun gear; a planet carrier; a plurality of sets of planet gears configured to be mounted on the planet carrier and to mesh with the at least one sun gear; and a plurality of ring gears configured to mesh with the plurality of sets of planet gears; wherein the at least one sun gear, the plurality of sets of planet gears and the plurality of ring gears all have the same modulus such that they can be arranged in different configurations that each produce a different output torque.

The present invention relates to the field of linear actuators, and in particular, to a modular electric linear actuator facilitating assembly and disassembly. The modular electric linear actuator of the present invention mainly includes components such as a motor group, a screw group, an inner tube group, an outer tube group, and pins. The components are fixed through clamping or the pins, so that installation using screw bolts is avoided. By adopting the modular assembly manner, the disassembly is convenient, and the assembly is fast, so that less labor is required, and the production cost is reduced. Moreover, the pins are used for fixing in the end, so that the stability of the entire structure is ensured.

A modular assembly is described for a power train. An assembly housing includes first and second cavities connected by an inter-cavity passage. An input shaft and an output shaft linked by a first clutch are disposed, at least in part, in the first cavity. A hydraulic control assembly provides hydraulic control signals to control, at least in part, the first clutch device. A hydraulic quill insert disposed, at least in part, in the inter-cavity passage, includes a plurality of control passages. The hydraulic quill insert receives the hydraulic control signals and directs the signals to control power flow from the input shaft to the output shaft.

The present disclosure is directed to a gas turbine engine, wherein the gas turbine engine defines a longitudinal direction, a radial direction, and a circumferential direction, and an axial centerline extended along the longitudinal direction, and an upstream end and a downstream end along the longitudinal direction. The gas turbine engine includes an annular stationary turbine frame centered around the axial centerline; an engine shaft extended generally along the longitudinal direction; an input shaft extended generally along the longitudinal direction; and a gear assembly including a first gear coupled to the input shaft, a second gear coupled to the turbine frame, and an inner spool coupling the first gear and the second gear, in which the inner spool defines a gear axis extended therethrough. The inner spool, the first gear, and the second gear are together rotatable about the gear axis. The gear axis is rotatable about the axial centerline of the engine. The gas turbine engine further includes a housing coupled to the inner spool and the engine shaft.

The disclosure relates to a method for producing various variants of a series of an electrically operable actuation system for actuating components which can be connected into and/or disconnected from a drive train of a motor vehicle. The actuation system comprises a drive unit, a transmission unit, and a control unit. The actuation system is assembled from a modular kit including the following components: a first group of first drive units, at least a second group of second drive units, a first group of first transmission units, at least a second group of second transmission units, a first group of first control units, and a second group of second control units. The groups of the drive units, the groups of the transmission units and/or the groups of the control units can be mechanically and electrically coupled to each other.

In a planetary gear device series composed of eight kinds of planetary gear devices with gear reduction ratios of 3 to 10, the planetary gear device of each gear reduction ratio uses an internal gear with 108 teeth or a slightly different number of teeth, and the module is common among the planetary gear devices of all gear reduction ratios. The combinations of the sun gear teeth number Za and the internal gear teeth number Zc in the planetary gear device of each reduction ratio are given in Table 1 of this application.