A flexure based guidance system for precision motion control includes a base that is fixed in position, a carriage that can move relative to the base, an actuator provides the force to move the carriage relative to the base, and one or more flexures arrays that each comprise two or more leaf flexure elements. The actuator causes the carriage to move relative to the base, which causes the flexure elements in the flexure array to flex. The leaf flexure elements are thin, compliant and deform, bend, or deflect in a deterministic manner when mechanically stressed. In some embodiments, stiffeners can be added to the flexures. The guidance system can be integrated into a varifocal head mounted display (HMD) to adjust a location of one or moveable elements in an optical system of the HMD to control a location of an image plane.

A coupling suitable for use in a flexible shaft includes a first and second shaft engagement means each having a central axis, a spacer means having a central axis, and a number of support wires. A first set of support wires each extends between the first shaft engagement means and the spacer means one or more times, the first set of support wires comprises at least one support wire, and the first and second shaft engagement means and the spacer means have a common axis (A) when the coupling means is not subject to any misalignment.

A parallel hybrid power transmission mechanism includes a crank shaft, a driven device to which a power of an engine and/or a motor generator is transmitted, an input shaft disposed on the driven device, a flywheel connected to the crank shaft, and a rotor disposed on the motor generator, including a first connecting portion connected to an outside of the flywheel. The rotor is configured to supply and receive a rotational power to and from the flywheel through the first connecting portion. The parallel hybrid power transmission mechanism further includes a coupling arranged independently from the rotor, including a second connecting portion connected to an inside of the flywheel, the coupling being configured to receive the rotational power of the flywheel through the second connecting portion, and an intermediate shaft connecting the coupling and the input shaft to each other, the intermediate shaft being configured to transmit the rotational power received by the coupling to the input shaft.

A parallel hybrid power transmission mechanism includes a crank shaft, a driven device to which a power of an engine and/or a motor generator is transmitted, an input shaft disposed on the driven device, a flywheel connected to the crank shaft, and a rotor disposed on the motor generator, including a first connecting portion connected to an outside of the flywheel. The rotor is configured to supply and receive a rotational power to and from the flywheel through the first connecting portion. The parallel hybrid power transmission mechanism further includes a coupling arranged independently from the rotor, including a second connecting portion connected to an inside of the flywheel, the coupling being configured to receive the rotational power of the flywheel through the second connecting portion, and an intermediate shaft connecting the coupling and the input shaft to each other, the intermediate shaft being configured to transmit the rotational power received by the coupling to the input shaft.

An electric machine and method for operating an electric machine are provided. The electric machine includes a first rotational component and a second rotational component rotationally engaging the first rotational component via a splined interface. The electric machine further includes a first lash reducing spring radially positioned between a first set two adjacent splines in the splined interface.

An electric machine and method for operating an electric machine are provided. The electric machine includes a first rotational component and a second rotational component rotationally engaging the first rotational component via a splined interface. The electric machine further includes a first lash reducing spring radially positioned between a first set two adjacent splines in the splined interface.

A belt pulley decoupler is provided for transmitting drive torque from belts of an auxiliary unit belt drive to the shaft of one of the auxiliary units, including: a belt pulley, a hub secured to the shaft, and a series circuit arranged in the drive torque flow between the belt pulley and the hub and including a decoupler spring and a wrap-around band that extends in the direction of the rotational axis of the belt pulley decoupler and is arranged radially between the belt pulley and the decoupler spring. Both ends of the wrap-around band open out radially when the drive torque is transmitted, the first end of the wrap-around band is braced against the inner surface of a first sleeve rotationally fixed in the belt pulley, and the second end of the wrap-around band is braced against the inner surface of a second sleeve rotationally mounted in the first sleeve.

A belt pulley decoupler is provided for transmitting drive torque from belts of an auxiliary unit belt drive to the shaft of one of the auxiliary units, including: a belt pulley, a hub secured to the shaft, and a series circuit arranged in the drive torque flow between the belt pulley and the hub and including a decoupler spring and a wrap-around band that extends in the direction of the rotational axis of the belt pulley decoupler and is arranged radially between the belt pulley and the decoupler spring. Both ends of the wrap-around band open out radially when the drive torque is transmitted, the first end of the wrap-around band is braced against the inner surface of a first sleeve rotationally fixed in the belt pulley, and the second end of the wrap-around band is braced against the inner surface of a second sleeve rotationally mounted in the first sleeve.

A clutch device includes a clutch hub radially inward of a clutch rotational axis on a hub side of the device, a clutch flange radially outward on a flange side of the device, a spring device through which the hub and flange sides support each other in the circumferential direction in a resilient torque-transmitting manner, the spring device having a spring element that, in the circumferential direction, is supported at opposite ends by first and second support components assigned to the flange and hub, and a stop device through which the hub and flange sides support each other in an interlocking torque-transmitting manner in the circumferential direction when a defined maximum twist angle is reached between the hub and flange sides, wherein the stop device has first and second interlocking elements integrally formed with the first and second support components that interlock when the maximum twist angle is reached.

A clutch device includes a clutch hub radially inward of a clutch rotational axis on a hub side of the device, a clutch flange radially outward on a flange side of the device, a spring device through which the hub and flange sides support each other in the circumferential direction in a resilient torque-transmitting manner, the spring device having a spring element that, in the circumferential direction, is supported at opposite ends by first and second support components assigned to the flange and hub, and a stop device through which the hub and flange sides support each other in an interlocking torque-transmitting manner in the circumferential direction when a defined maximum twist angle is reached between the hub and flange sides, wherein the stop device has first and second interlocking elements integrally formed with the first and second support components that interlock when the maximum twist angle is reached.