| 摘要 |
A stopper for robot rotary articulation limits the rotation angle of a shaft where a protrusion is formed. The stopper includes a first ring-shaped bush member, a second bush member, having an inner diameter smaller than that of the first bush member, connected to an inner circumference of the first bush member to form a step surface against the first bush member, and rotatably supported by inserting the shaft therein, a first stop protrusion extending from an inner surface of the first bush member in a radial direction thereof and a second stop protrusion protruded from an outer circumferential surface of the second bush member, in which the protrusion of the shaft during rotation of the shaft slides against the step surface and contacts with the first stop protrusion, to thereby rotate the stopper, and the second stop protrusion contacts with a protrusion fixed to a housing of a robot rotary articulation to thereby stop rotation of the shaft and stopper. Accordingly, an operation region of 360 degrees or more can be ensured, and the wide contact area of the outer circumference of the shaft can prevent rotation failure of the stopper. |
