The invention relates to a passive
pendulum bob type lubricating self-cleaning mechanism. The passive
pendulum bob type lubricating self-cleaning mechanism is characterized in that a motor is fixedlyconnected to a big arm in a static sealing manner, the output end of the mechanism is connected with one end of a speed
reducer output shaft through a speed
reducer input gear shaft, one end of a speed
reducer shell is arranged in the big arm in a static sealing mode, the other end of the speed reducer shell is in sealing rotation connection with the speed reducer output shaft, the other end of the speed reducer output shaft is in static sealing connection with a small arm, the two ends of a double-head
piston rod are correspondingly connected with a large cylinder
barrel and a small cylinderbarrel to form a movable pair and are in sealed connection, a
pendulum bob is hinged to the big arm and is connected with the double-head
piston rod through a connecting rod, a speed reducer inner cavity is arranged in the big arm, the speed reducer inner cavity communicates with the interior of the small cylinder
barrel through an oil way A, the interior of the large cylinder
barrel communicateswith the speed reducer inner cavity through an oil way B, an oil outlet one-way valve is arranged in the oil way A, an oil return one-way valve is arranged in the oil way B, and a
filter element is arranged in the oil way B close to the large cylinder barrel. According to the passive pendulum bob type lubricating self-cleaning mechanism, the
internal pressure of a joint of a
robot can be stabilized, oil leakage is prevented, the energy efficiency is reduced, and the energy-saving and environment-friendly effects are better.