The present disclosure provides an improved cogwheel permitting enhanced meshing of cogwheels when operating perpendicularly. Exemplary embodiments introduce a multi-cogwheel design with specific dimensions and tooth profiles to permit perpendicular engagement of cogwheels whilst permitting translation of such cogwheels.

A gear of a gear device includes a plurality of teeth having tooth surfaces. The tooth surfaces are shaped such that contact length ratios of three or more of the teeth are outside a predetermined range centered on an average value of the contact length ratios of all of the teeth, where the contact length ratio is obtained by dividing a contact length of a tooth contact face by a diagonal length of a plane of action.

A gear of a gear device includes a plurality of teeth having tooth surfaces. The tooth surfaces are shaped such that contact length ratios of three or more of the teeth are outside a predetermined range centered on an average value of the contact length ratios of all of the teeth, where the contact length ratio is obtained by dividing a contact length of a tooth contact face by a diagonal length of a plane of action.

Provided are a gear and a gear damper that enable noise reduction and offer excellent versatility. A gear includes: a metal gear body; and a damper unit that is provided to cover at least a meshing surface of each of teeth in the gear body and has a surface made of an elastic body. As a result, the gear enables noise reduction and offers excellent versatility.

Provided are a gear and a gear damper that enable noise reduction and offer excellent versatility. A gear includes: a metal gear body; and a damper unit that is provided to cover at least a meshing surface of each of teeth in the gear body and has a surface made of an elastic body. As a result, the gear enables noise reduction and offers excellent versatility.

A flat strain wave gearing (1) has a mechanism for preventing a flexible externally toothed gear (4) from moving in the direction of the device center axis (1a) with respect to a rigid internally toothed gears (2, 3). The mechanism has an inner-peripheral groove (11) formed on inner teeth (3a) of the internally toothed gear (3), an outer-peripheral groove (12) formed on outer teeth (4a) of the externally toothed gear (4), and a flexible ring (13) mounted between the inner-peripheral groove (11) and the outer-peripheral groove (12). The ring (13) is engageable with groove inner-peripheral surfaces (11a, 11b, 12a, 12b), from the direction of the device center axis (1a), at meshing positions of the both gears (2, 4).

The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and self-lubricating gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more helical balance gears, fixed helical gear, and output helical gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the helical balance gears, which causes rotation of the output helical gear, which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output helical gear causes the gear teeth on the fixed and output helical gears to lock the helical balance gear in place.

The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and self-lubricating gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more helical balance gears, fixed helical gear, and output helical gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the helical balance gears, which causes rotation of the output helical gear, which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output helical gear causes the gear teeth on the fixed and output helical gears to lock the helical balance gear in place.