The invention relates to an
oil supply device which comprises a
machine frame. The
machine frame is provided with an
oil tank, a first
piston mechanism and a driving mechanism. The first
piston mechanism comprises a first
piston cylinder, a first piston and a first
piston rod. The first piston is in sealed sliding connection with the interior of the first
piston cylinder, the first
piston rod is fixedly connected to the first piston, an oil inlet
pipe is connected between the first
piston cylinder and the
oil tank, the oil inlet
pipe is provided with a first one-way valve, the first
piston cylinder is connected with an oil drainage mechanism, a
brush is connected to the oil drainage mechanism, and the oil drainage mechanism is provided with a second one-way valve. The driving mechanism comprises an inner gear ring and a gear, the gear is engaged with the inner gear ring, a first connection rod is fixedly connected to the gear, the end, away from the gear, of the first connection rod isused for being detachably connected with a chain wheel, a second connection rod is fixedly connected to the gear, and the end, away from the gear, of the second connection rod is rotationally connected to the first
piston rod. By means of the scheme, a chain is automatically coated with oil.