초록 ▼

A cooling fan is provided on at least one of the drive pulley and the driven pulley on which the drive belt is wound. A substantially closed casing in which the pulleys and the belt are accommodated has its interior partitioned in two chambers. With rotation of the fan, the air inside the casing is

A cooling fan is provided on at least one of the drive pulley and the driven pulley on which the drive belt is wound. A substantially closed casing in which the pulleys and the belt are accommodated has its interior partitioned in two chambers. With rotation of the fan, the air inside the casing is circulated within the casing where one of the chambers acts as a going passage and the other as a return passage, respectively, to thereby cool the pulleys and the belt. The two chambers are communicated with each other by communication means which are arranged at the pulleys and adapted to allow smooth movement of the air through the pulleys. Further provided are means for enhancing the efficiency of cooling the driven pulley by the circulating air and means for radiating heat generated within the casing through the casing walls.

대표청구항 ▼

A belt transmission comprising: a drive pulley; a driven pulley; a belt engaging with said drive pulley and said driven pulley; a casing accommodating said drive pulley, said driven pulley and said belt; fan means provided on at least one of said drive pulley and said driven pulley for rotation in u

A belt transmission comprising: a drive pulley; a driven pulley; a belt engaging with said drive pulley and said driven pulley; a casing accommodating said drive pulley, said driven pulley and said belt; fan means provided on at least one of said drive pulley and said driven pulley for rotation in unison therewith; means partitioning the interior of said casing into a first chamber and a second chamber, said first and second chambers extending at least between said drive pulley and said driven pulley; and means communicating said first chamber and said second chamber with each other; said fan means, said partitioning means and said communication means being arranged such that rotation of said fan means causes a gas in said casing to be circulated in said casing through said first and second chambers to effect heat exchange with said drive pulley, said driven pulley, said fan means and said belt, whereby one of said first and said second chamber serves as going passage, and the other as a return passage, respectively.