Kobelco Construction Machinery Co., Ltd.

Takamasa Abe

Kenichi Terauchi

Yoshiki Kamon

Masatsugu Hamasaki

Hidekazu Iwashita

Formed inside a housing of a slewing unit are: an upper outer space located outside a piston in the radial direction, and at least one supply passage that guides, inward in the radial direction, a lubricant that has passed through a lower space, an outer passage, and an upper outer space in this order, to the lubricant to a plurality of brake members located below the piston. The plurality of brake members are disposed above a speed reducer and receive pressing force from the piston to brake the rotation of a rotation shaft before the rotation is decelerated by the speed reducer.

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Hiroshima, Japan

Takamasa Abe