Patent ID: 6283882
Filing Date: 2001-09-04
Classification: F16G

Abstract:
A heavy-duty power transmission V-belt comprising:two endless tension members each including a large number of upper engaged parts and lower engaged parts correspondingly provided respectively on an upper face thereof closer to a back face of said belt and on a lower face thereof closer to a bottom face of said belt; anda large number of blocks each including a fitting part for compressedly fitting said tension member therein and a contact part to be brought into contact with each groove face of a pulley formed on each side face of said blocks in a widthwise direction of said belt, said fitting part including an upper engaging part formed on an upper face of said fitting part to be engaged with each of said upper engaged parts and a lower engaging part formed on a lower face of said fitting part to be engaged with each of said lower engaged parts,wherein said blocks are fixedly engaged with said tension members, with allowing both said contact parts on the side faces of said blocks and each side face of said tension members together working as each side face of said belt in the widthwise direction to be in contact with each groove face of the pulley, by fitting said tension members in said fitting parts of said blocks, whereby power is transmitted through engagement between said engaging parts of said blocks and said engaged parts of said tension members,a lower corner of an innermost portion of said fitting part of each block in a direction for compressedly inserting each of said tension members is formed into an innermost lower face inclined upward to the inside of said fitting part and formed in a downward range from a position the same as or higher than a pitch line of said belt, andan innermost lower face angle .alpha. in degrees between said innermost lower face and a vertical plane and a belt side face angle .beta. in degrees between the side face of each of said blocks and said vertical plane are determined to have a relationship of .beta.-3<.alpha.<.beta.+3.