TENSION PULLEY ASSEMBLY HAVING COOLING FUNCTION

摘要

The present invention relates to a tension pulley assembly with an autonomous cooling function utilized for agricultural machines such as a rice planting machine and the like. The tension pulley assembly of the present invention includes: a circular outer rim (12) with a predetermined width; an inner rim (14) formed in a circular shape smaller than the outer rim inside the outer rim and having a predetermined width; and multiple blades (16) formed between the inner rim and the outer rim and forming an air flow in an axial direction inside a vacant space (18) between the inner and outer rims. The blade is capable of autonomously cooling by generating an air flow outward from the inner side of a part where a tension pulley is installed. The pulley assembly additionally includes: a support shaft fitted inside the inner rim; an oil seal fitted inside the inner rim to be interposed between the support shaft and the inner rim and preventing a leak of lubricating oil from the inside; a preventing member closely inserted into the inner circumference of the inner rim from the outer side of the inner rim and preventing a leak of the lubricating oil; and a bearing supported between the oil seal and the preventing member, wherein the support shaft is inserted.