| 摘要 |
An eccentric rocking type reduction gear capable of being effectively cooled by an extremely simple structure. The eccentric rocking type reduction gear (1) has a camshaft (11) having crank parts (11a, 11b), externally toothed gear members (12) having holes for receiving the crank parts and eccentrically moved by rotation of the camshaft, an internally toothed gear member (13) meshed with external gear teeth formed on the outer peripheral surfaces of the externally toothed gear members and having internal gear teeth that are formed on the inner peripheral surface of the internally toothed gear member and are slightly greater in quantity than the external gear teeth, and support members (14) positioned at both ends of the externally toothed gear members and rotatably supporting the both ends of the camshaft. Support members (18, 19) are integrally connected to each other through a column part (17). A cooling medium passage (30) is formed in a manner penetrating through the integrally connected support members (18, 19) and through the column part (17), and a cooling medium, such as cooling water and cooling air, is passed through the cooling medium passage. Consequently, the eccentric rocking type reduction gear can be efficiently cooled. |
