Denso Corporation

Masahito Sakai

Kazuki Maruo

Fumihiro Shimizu

Tomoki Yamashita

Hiroyuki Okada

A speed reducer including: a first gear; an eccentric shaft joined to the first gear, the eccentric shaft has first and second supporting portions offset in a rotation radial direction with respect to a first gear rotation shaft; a fixed gear at an eccentric shaft radial direction outer side, and whose rotation is restricted; a transmitting gear supported at the first supporting portion and meshes with the fixed gear, and the transmitting gear revolves around the first gear rotation shaft and rotates around its own axis; an outputting portion rotating due to the transmitting gear revolving and rotating around its own axis; and a locking gear supported at the second supporting portion and meshes with the fixed gear, and the locking gear revolves around the first gear rotation shaft and rotates around its own axis, and rotation of the outputting portion is restricted.

Speed reducer and motor with speed reducer

A speed reducer includes a helical gear, an eccentric shaft and a slider plate. The speed reducer also includes a transmission gear and an output gear body. The transmission gear is supported at a first support part, transmission gear spinning is restricted by engagement with the slider plate, and the transmission gear revolves by the helical gear rotating with the eccentric shaft. The output gear body rotates by the transmission gear revolving. The transmission gear includes a pair of restricting protrusions protruding toward the slider plate side. The restricting protrusions have engaging surfaces that touch the slider plate wherein the engaging surfaces oppose the slider plate in a radial direction of the transmission gear. Surfaces at opposite sides of the restricting protrusions from the slider plate are formed, as seen in the axis direction of the transmission gear, to be convex to the opposite sides thereof from the slider plate.

Speed reducer and speed reducer-equipped motor

A gear reducer has a helical gear, an eccentric shaft that is joined to the helical gear and has a first supporting portion that is offset in a rotation radial direction with respect to a rotation shaft of the helical gear, and a slider plate that is disposed at a radial direction outer side of the eccentric shaft. Further, the gear reducer has a transmitting gear that is supported at a first supporting portion, and whose rotation around its own axis is restricted due to the transmitting gear being engaged with the slider plate, and that revolves due to the helical gear rotating together with the eccentric shaft, and has an output gear body that rotates due to the transmitting gear revolving. The transmitting gear has a pair of restricting projections that project-out toward the slider plate side, and the slider plate is disposed between the pair of restricting projections.

Growing community of inventors

Kariya, Japan

Masahito Sakai