The present disclosure relates to a cam wheel for accommodating a cam belt, having a hub plate for mounting on a shaft and a plurality of tappet means including belt support areas for accommodating the cam belt, the tappet means being attached, projecting perpendicularly away from the hub plate and spaced apart from one another, to the hub plate such that gaps are formed between the tappet means for accommodating cams of the cam belt in a positive locking manner.

A roller gear for use in a roller gear and sprocket configuration of a drive system is disclosed, particularly for use in a landing gear drive system of an aircraft. Alternative embodiments and, in particular, means for permitting removal and replacement of rollers and roller mounting pins in the roller gear are disclosed.

A roller gear for use in a roller gear and sprocket configuration of a drive system is disclosed, particularly for use in a landing gear drive system of an aircraft. Alternative embodiments and, in particular, means for permitting removal and replacement of rollers and roller mounting pins in the roller gear are disclosed.

To securely and easily disassemble and assemble a rack gear and a pinion gear. A drive mechanism 5 includes a rack gear 5A, a pinion gear 5B engaging with the rack gear 5A, a positioning member 5D fixed to a portion in the rack gear 5A where rack teeth 5Ab are not included, and a plurality of abutting members 5E disposed along a rotation direction of the pinion gear 5B. In a case in which at least one of the rack gear 5A and the pinion gear 5B is moved in a relative movement direction at the time when the rack gear 5A engages with the pinion gear 5B, abutment between the positioning member 5D and the abutting member 5E defines a rotational position of pinion teeth 5Bb of the pinion gear 5B to be an engaging position with the rack teeth 5Ab of the rack gear 5A.

A gear element includes a support (3) on which first rollers (10a) and second rollers (10b), which are intended for engaging with the teeth of a neighboring gear element (2), are alternately mounted. Each roller (10a, 10b) is mounted for rotation about its longitudinal axis (X′) via rotary guide means (20) cooperating with end portions of the rollers (10a, 10b). The rotary guide means (20) of the first rollers (10a) and the rotary guide means (20) of the second rollers (10b) are staggered in the vicinity of an outer periphery of the support (3).

A gear element includes a support (3) on which first rollers (10a) and second rollers (10b), which are intended for engaging with the teeth of a neighboring gear element (2), are alternately mounted. Each roller (10a, 10b) is mounted for rotation about its longitudinal axis (X′) via rotary guide means (20) cooperating with end portions of the rollers (10a, 10b). The rotary guide means (20) of the first rollers (10a) and the rotary guide means (20) of the second rollers (10b) are staggered in the vicinity of an outer periphery of the support (3).

A gear shifting system includes a drive shaft, a face gear, and at least one power transmission component(s). The gear system also includes a pinion gear assembly, which is coupled to the first end of the drive shaft. The pinion gear assembly is configured to mesh with one of the concentric gear-rings on the face gear, so that the rotational movement of the gear-ring is transmitted to the shaft. The gear shifting system is easy to operate, mechanically simple, can smoothly shift between gears under any gear shifting conditions, and exhibits decreased component wear.

Methods and apparatus for mechanically driving components in a desired direction, such as in a moving craft. In one embodiment, the craft comprises a vertical or short takeoff and landing (VSTOL) aircraft comprising one or more rotating rings having airfoils disposed around a periphery thereof. In one variant, the one or more rings are driven by a multi-level drive apparatus having a plurality of angularly offset roller-based drive levels and a plurality of corresponding angularly offset driven members (e.g., rings), the plurality of driven members coupled to e.g., the at least one rotating ring. Advantageously, use of this arrangement provides enhanced reliability as well as opportunities for selective load balancing, and obviates comparatively heavy lubrication components such as seals and liquid lubricants, thereby also saving weight when applied to the host craft.

Methods and apparatus for mechanically driving components in a desired direction, such as in a moving craft. In one embodiment, the craft comprises a vertical or short takeoff and landing (VSTOL) aircraft comprising one or more rotating rings having airfoils disposed around a periphery thereof. In one variant, the one or more rings are driven by a multi-level drive apparatus having a plurality of angularly offset roller-based drive levels and a plurality of corresponding angularly offset driven members (e.g., rings), the plurality of driven members coupled to e.g., the at least one rotating ring. Advantageously, use of this arrangement provides enhanced reliability as well as opportunities for selective load balancing, and obviates comparatively heavy lubrication components such as seals and liquid lubricants, thereby also saving weight when applied to the host craft.

An object of the present invention is to provide a steering assistance device that has a single line of final output, thereby to achieve downsizing. The assistance device of the present application includes a speed reducer configured to decelerate a driving force from a motor and output the decelerated driving force, wherein the speed reducer is configured to receive an operation force produced by an operation of a human.