Patent ID: 7097581
Filing Date: 2006-08-29
Classification: F16G

Abstract:
1. A power transmission V-belt comprising: at least one endless tension member a top surface of which on the back face side of the belt is provided with a plurality of upper receiving/inserting parts aligned lengthwise of the belt and a bottom surface of which on the bottom face side of the belt is provided with a plurality of lower receiving/inserting parts aligned lengthwise of the belt in correspondence with the plurality of upper receiving/inserting parts; and a plurality of blocks each of which has at least one fitting part into which one said tension member is fitted by press insertion and contact parts respectively provided in side surfaces thereof in the widthwise direction of the belt with contactable with side faces of a pulley groove, said at least one fitting part being formed at the upper face with an upper inserting/receiving part mating with the upper receiving inserting part of the tension member and being formed at the lower face with a lower inserting/receiving part mating with the lower receiving/inserting part of the tension member, wherein through the fitting of the tension member into the fitting part of each of the blocks, the plurality of blocks are securely engaged to the tension member so tat both the contact part of the side surface of each of the blocks in the widthwise direction of the belt and the side surface of the tension member are brought into contact with the side face of the pulley groove, whereby mating engagement between the inserting/receiving parts of the blocks and the receiving/inserting parts of the tension member allow power transmission, wherein each of the blocks is formed of a resin part constituting at least the contact part an the fitting part, an a reinforcement at least partly embedded in the resin part and made of a material having a higher modulus of elasticity than he resin part, wherein the back of the fitting part of each of the blocks in the direction of insertion of the tension member is formed with an abutment surface against which an abutment part of the tension member located at a leading end thereof in the direction of insertion of the tension member abuts, wherein the fitting part includes an indent formed by a recessed portion of the resin part located between the upper inserting/receiving part and the innermost abutment surface to prevent cracking of said blocks in a portion where said upper inserting/receiving part and said innermost abutment surface meet, and wherein the indent forms a step in a part of the tension member with the use of the belt and is engaged to the step.