Seal structure of belt cover for internal combustion engine

A seal structure of a belt cover for an internal combustion engine, the internal combustion engine including a timing belt disposed on one end side in a cylinder bore array direction of a body of the internal combustion engine and drivingly coupling a crankshaft and a camshaft, the seal structure of the belt cover accommodating the timing belt in a liquid-tight state, the seal structure of the belt cover comprising:

• an inside cover member disposed on a side of the body of the internal combustion engine with respect to the timing belt;
• and
• an outside cover member disposed on a side opposite to the body of the internal combustion engine with respect to the timing belt, and accommodating the timing belt in a liquid-tight state together with the inside cover member, wherein
• the outside cover member is divided into at least an upper outside cover and a lower outside cover in a cylinder axial direction,
• the upper outside cover and the inside cover member both have, on an outer periphery, mating surfaces that are fit with each other, and a first seal in the cylinder bore array direction is formed by a seal member accommodated in a seal member accommodating groove formed in the mating surface of the upper outside cover,
• the upper outside cover and the lower outside cover respectively have, at a lower end and an upper end, an upper mating surface and a lower mating surface that are fit with each other, and a second seal in the cylinder axial direction is formed by a male portion formed on the lower mating surface and a female groove formed on the upper mating surface and with which the male portion is engaged,
• a projecting portion is formed on the inside cover member at a boundary between the first seal and the second seal, the projecting portion having an end upper surface flush with an end upper surface of the male portion of the lower outside cover, and
• a seating portion on which a lower end of the seal member accommodated in the seal member accommodating groove is seated is formed by the end upper surface of the male portion and the end upper surface of the projecting portion of the inside cover member.