Kawasaki Jukogyo Kabushiki Kaisha

Taku Nishihira

Takunobu Nishida

Isao Fujii

Hirofumi Akahori

Akihito Abe

Takenori Terada

Mamoru Yoshitomi

A planetary carrier includes: a first plate and a second plate which pivotally support planetary gears between opposing plate surfaces of the first and second plates such that the planetary gears are located on a circular path so as to be spaced apart from each other, the circular path being a path of rotational centers of the planetary gears; and coupling plates which are located between the opposing plate surfaces, are spaced apart from each other in a circumferential direction of the circular path, couple the first plate and the second plate, and are coupled to external members at positions away from the planetary gears in the circumferential direction. The coupling plates are coupled to the external members at an outside of the circular path in a radial direction. Each of the coupling plates is coupled to the first plate and the second plate only at a first side in the circumferential direction.

Planetary carrier and planetary gear mechanism

An output frame is connected to a portion of a radially outer portion of a carrier, the portion being closer to a front plate than to a rear plate. The carrier has a first region as an external force transmission path between front pin support surfaces and the output frame, and a second region as the external for transmission path between rear shaft support surfaces and the output frame, and a stiffness with respect to a twist force of the first region and a stiffness with respect to the twist force of the second region are equal to each other. In the front plate and the rear plate, a stiffness with respect to a radial tensile force applied to the front pin support surfaces and a stiffness with respect to the radial tensile force applied to the rear shaft support surfaces are equal to each other.

Planetary gear reduction device

Growing community of inventors

Kakogawa, Japan

Taku Nishihira