gear unit

Abstract

The invention provides a gear device. The gear unit includes: a crankshaft having a shaft main body and an eccentric portion; a connecting member having external teeth and for transmitting the rotation of an input gear to the crankshaft (6); a gear carrier which rotatably connects the crankshaft support; a swing gear, which swings and rotates with the rotation of the eccentric part; and an outer cylinder, which has internal teeth meshing with the swing gear, and the gear device is configured so that the gear holder and the outer The cylinder relatively rotates concentrically, and the connecting member is configured to be selectively set to a first position where the external teeth mesh with the first input gear and a second position where the external teeth mesh with the second input gear.

Description

technical field The present invention relates to a gear device in which any one of a first input gear and a second input gear is selectively installed as an input gear. Background technique As a conventional gear device, a speed reducer is described in Patent Document 1 (refer to Japanese Patent Laid-Open No. 2002-317857). An eccentric body shaft of the meshing transmission gear, a support body for supporting the eccentric body shaft, an external gear that swings and rotates in accordance with the rotation of the eccentric body portion, and an internal gear that meshes with the external gear. The speed reducer includes a torque input unit including a motor having a motor rotation shaft and an input gear member having an input gear meshing with the large gear and coupled to the motor rotation shaft. In this speed reducer, the input gear rotates as torque is input from the motor from the first direction. Also, the rotation of the input gear is transmitted to the intermediate...

AI Technical Summary

Problems solved by technology

Therefore, an increase in the number of parts will result

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