Four-claw type main bearing sealing device of full-section heading machine

The invention provides a four-claw type main bearing sealing device of a full-section heading machine. The four-claw type main bearing sealing device comprises a four-claw sealing body and a sealing pressing plate, wherein sealing claws of the four-claw sealing body and a sealing bottom plate of the four-claw sealing body are connected to form a whole body; the four sealing claws of the four-claw sealing body are linearly and horizontally arrayed on the sealing bottom plate of the four-claw sealing body in parallel in a manner of having equal distances from the sealing bottom plate of the four-claw sealing body; the top ends of the four sealing claws of the four-claw sealing body are in linear contact with a fitting surface of a sealing sliding ring A and are fixed on a rotary ring B by the sealing pressing plate; the rotary ring B is fixed on a large gear ring C and the large gear ring C is engaged with a small gear; a sealing end cover E is used for covering the sealing pressing plate and the four-claw sealing body; and the other end of the rotary ring B is connected with a cutter disc F of the full-section heading machine. The four-claw type main bearing sealing device has good wear-resisting and anti-vibration effect, good sealing effect, relatively long service life, relatively simple structure, relatively low cost and relatively small abrasion amount; and the requirements on machining precision of mounting and sealing parts are low, and the four-claw type main bearing sealing device is applied to the technical field of the full-section heading machine.