US Patent No. 9,073,218


Patent No. 9,073,218
Issue Date July 07, 2015
Title Multiple Joints Robot Having Cover On End Effector Attachment
Inventorship Hideyuki Watanabe, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,073,218

1. A multiple joint robot, comprising:
an arm,
a wrist part provided at a tip end of the arm, and
a reduction gear unit provided at the wrist part and capable of receiving an end effector and of transmitting power to the
end effector,

wherein the reduction gear unit includes
a fixed part fixed to the wrist part by a fixing element,
a rotational part rotatable relative to the fixed part, and
a sealing element provided in a circumference of the rotational part,
the multiple joint robot further comprises a cover attached to the fixed part of the reduction gear unit, the cover being
adapted to cover a convex portion or a concave portion formed on the fixed part by the fixing element and to cover the sealing
element so as to prevent the sealing element from being exposed to an exterior,

the cover is a ring-shaped member including an outer circumferential portion and an inner circumferential portion, and
a thickness of the inner circumferential portion is less than a thickness of the outer circumferential portion.