Patent ID: 8740738

Claim:
A high load transmission V-belt, comprising: a tension band having tensile strength and extending in a belt length direction; and a plurality of blocks, each of which has an upper beam portion arranged on an outer surface side of the belt and a lower beam portion arranged on an inner surface side of the belt, and is attached and fixed to the tension band so as to sandwich the tension band in a belt thickness direction in an inter-beam clearance portion formed between the upper and lower beam portions, and which are in a state in which the blocks are arranged in the belt length direction, wherein an engagement section is a section of the tension band fitted into the inter-beam clearance portion of each of the blocks, and an increased amount of change in a dimension (T) of the engagement section in the belt thickness direction due to thermal expansion is equal to or less than an amount of change in a dimension of the inter-beam clearance portion of each of the blocks in the belt thickness direction while running the belt, wherein the tension band includes a core wire substantially extending in the belt length direction and arranged in a belt width direction, and a rubber portion stacked on the core wire on at least one of the outer and inner surface sides of the belt, wherein the increased amount of change in the dimension (T) of the engagement section of the tension band in the belt thickness direction due to the thermal expansion is an increased amount of change in a dimension (Tg) of the rubber portion of the engagement section in the belt thickness direction, and wherein a ratio of the dimension (Tg) of the rubber portion of the engagement section in the belt thickness direction to the dimension (T) of the engagement section of the tension band in the belt thickness direction is equal to or less than 50%.