A gear profile for orbital gear transmission is disclosed in which an outer gear (10) and an inner gear (30) are included.

A gear transmission comprises an internal gear, and an external gear that meshes with the internal gear and rotates eccentrically relative thereto.

An inner gear (30) driven by a rotary shaft (20) and an outer gear (40) are accommodated in a housing (10).

One of said first and second gears is an external gear while the other is an internal gear.

In the present embodiment, the pump is configured as an external gear pump.

The planetary gear system (110) includes a sun gear (120), planetary gears (130), and an outer gear (140).

A torque dividing gear drive system, a method of driving and output gear, and a method of evenly dividing an output torque between three3 gears is provided.

An output shaft of the second motor is coupled to an outer gear of the differential speed reducer.

A gear transmission is provided with an internal gear, and an external gear which makes eccentric rotation relative to the internal gear while engaging with the internal gear.

A silk hat type flexible external gear (13) of a flexible mesh engagement gear device (11) comprises a barrel portion (22), a diaphragm portion (23) and a boss portion (25).

The speed-reducing mechanism (17) has an internal gear (39) engaged and rotated with the output shaft (16) and an external gear (40) with which the internal gear (39) internally meshes.

External gears (38X, 38Y) engage with the eccentric rotary portions (42X, 42Y) and revolve around the axis (CL1).

The outer gearing (8) is connected to the vehicle propulsion system via shaft (12) and gear (9).

The reduction gear (10) comprises a motor gear, an intermediate shaft (13), a first gear (70), a second gear (64), an input shaft (28), external gears (38X, 38Y), and an internal gear (58).

An improved commutator (27) for a gerotor-type hydraulic pump or motor (11) of the type having an orbiting outer (15) or inner (17) gear.