Toyota Jidosha Kabushiki Kaisha

Yoshinori Miura

Fumihiko Ichikawa

Yuusuke Nishizawa

Norihiko Kondo

Mikio Tsuzuki

A transmission testing device that performs tests to verify transmission functionality has: an output shaft directly or indirectly coupled to a differential gear section of the transmission; a rotary driving unit for rotating the output shaft; and a cylindrical meshing unit comprising a meshing portion to mesh with a side gear of the differential gear section, and a chuck portion in which a fluid circuit is formed. The meshing unit is fixed to a differential case of the differential gear section by way of expanding the chuck portion in the radial direction of the chuck portion by applying pressure to the fluid in the fluid circuit.

Transmission testing device and transmission testing method

A method and an apparatus for lapping teeth of a pair of gears by rotating one of the gears in engagement with the other gear, while applying a load torque to the other gear and moving the gears relative to each other such that a teeth contact area of the gears is moved in a direction of width of contacting faces of the teeth of the gears, so that the face of each tooth of the gears is lapped over a substantially entire width thereof. A lapping controller is adapted to change at least one of the load torque applied to the relevent gear, rotating speeds of the gears, and a rate of movement of the teeth contact area of the gears, as the gears are moved relative to each other to move the teeth contact area of the gears in the direction of width of the contacting faces of the gears, so that the gear teeth are lapped efficiently, depending upon the configurations and conditions of use of the gears.

Growing community of inventors

Toyota, Japan

Yoshinori Miura