Friction transmission belt
AssigneeBando Chemical Industries, Ltd.
InventorsHiroyuki Shiriike, Tomoyuki Yamada, Hiroyuki Tachibana, Fumihiro Mukai
Life of this patent
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Abstract
In a friction transmission belt in which a compression rubber layer provided to an inner circumferential side of the belt body is wrapped over pulleys such that the compression rubber layer contacts the pulleys, such a configuration that both of a noise reduction and durability while the belt is running can be achieved is obtained. The compression rubber layer is configured so as not to include short fibers and so as to have a surface roughness, i.e., an Ra of at least a pulley contact surface of the compression rubber layer equal to or more than 3 μm.
Claims7
A friction transmission belt comprising a belt body which includes a compression rubber layer on an inner circumferential side of the belt that is adapted to wrap around pulleys such that the compression rubber layer includes a contact surface that contacts and transmits power to the pulleys:
- wherein the compression rubber layer consists of rubber and particles of resin, wherein the particles of resin are exposed on the contact surface on the inner circumferential side of the belt to impart a surface roughness, Ra equal to or more than 3 μm and less than 70 μm, and
- wherein a surface layer and a main body layer located inside the surface layer are formed on a side of a pulley contact surface of the compression rubber layer;
- and
- wherein the resin particles are mixed only within the surface layer.
A friction transmission belt comprising a belt body which includes a compression rubber layer on an inner circumferential side of the belt that is adapted to wrap around pulleys such that the compression rubber layer includes a contact surface layer that has a thickness equal to or more than 15 μm that contacts and transmits power to the pulleys,
- wherein the contact surface layer on the inner circumferential side of the belt consists of a mixture of rubber and particles of resin and has a surface roughness, Ra of at least a pulley contact surface of the compression rubber layer equal to or more than 3 μm and less than 70 μm, and
- wherein a surface layer and a main body layer located inside the surface layer are formed on a side of a pulley contact surface of the compression rubber layer;
- and
- wherein the resin particles are mixed only within the surface layer.
Dependencies are inferred from the claim text.