Bonding method for elastic member and metal, and power transmission device

Abstract

Vulcanizing-bonding is carried out using at least a phenolic resin-based vulcanized adhesive F and a silicon compound-based vulcanized adhesive C. Based on an idea of making a penetration of water through a portion bonded with metal difficult, decreasing the adhesion with metal is prevented by utilizing the phenolic resin-based vulcanized adhesive F through which less water can penetrate than the silicon compound-based vulcanized adhesive C, and can increases a thickness of a membrane. Thereby, EPDM or AEM vulcanizable with a peroxide can be strongly bonded to metal, by forming a two-layered structure of the phenolic resin-based vulcanized adhesive F and the silicon compound-based vulcanized adhesive C. Further, a range of selecting a rubber material as an elastic member to be utilized by bonding to metal can be broadened.

1 . A method for bonding an elastic member made of an ethylene-propylene-diene copolymer (EPDM) vulcanizable with a peroxide or an elastic member made of an acryl-ethylene copolymer (AEM) vulcanizable with a peroxide to metal, characterized by 
 utilizing at least a phenolic resin-based vulcanized adhesive (F) and a silicon compound-based vulcanized adhesive (C) to vulcanize and bond.    
   
   
       2 . The method for bonding an elastic member to metal according to  claim 1 , characterized by laminating the metal, the phenolic resin-based vulcanized adhesive (F), the silicon compound-based vulcanized adhesive (C), and the ethylene-propylene-diene copolymer (EPDM) or the acryl-ethylene copolymer (AEM) in that order, and bonding them.  
   
   
       3 . The method for bonding an elastic member to metal according to  claim 1 , characterized by that a thickness of each layer of the phenolic resin-based vulcanized adhesive (F) and the silicon compound-based vulcanized adhesive (C) is from 3 to 15 μm.  
   
   
       4 . The method for bonding an elastic member to metal according to  claim 1 , characterized by a surface roughness Rz of the metal is from 3 to 12.5.  
   
   
       5 . A power transmission device for transmitting a rotational motive power of a driving source to a rotating device ( 7 ) at a passive side, comprising 
 a pulley ( 1 ) which receives a rotational motive power from a driving source to rotate, and    a hub ( 2 ) which is arranged coaxially with the pulley ( 1 ), and is connected to a rotating shaft ( 3 ) of the rotating device ( 7 ) to rotate as one piece with the rotating shaft ( 3 ),    wherein the hub ( 2 ) has a hub-side engaging portion ( 24 ) composed of an elastic member connected to an inner-periphery face side or an outer-periphery face side, or an inner- and outer-periphery face sides of an outer periphery portion ( 23 ) engaged with a front-side end face of the pulley ( 1 ),    the pulley ( 1 ) has a pulley-side engaging portion ( 12 ) formed on the front-side end face corresponding to the outer periphery portion ( 23 ) of the hub ( 2 ), and    a torque-transmitting structure of the hub ( 2 ) and the pulley ( 1 ) is formed by allowing the hub-side engaging portion ( 24 ) and the pulley-side engaging portion ( 12 ) to engage,    characterized by    utilizing an elastic member made of an ethylene-propylene-diene copolymer (EPDM) vulcanizable with a peroxide or an elastic member made of an acryl-ethylene copolymer (AEM) vulcanizable with a peroxide for the hub-side engaging portion ( 24 ), and    bonding the hub ( 2 ) made of metal and the hub-side engaging portion ( 24 ) with a method for bonding an elastic member to metal according to  claim 1 .    
   
   
       6 . A power transmission device for transmitting a rotational motive power of a driving source to a rotating device ( 7 ) at a passive side, comprising 
 a pulley ( 1 ) which receives a rotational motive power from a driving source to rotate, and    a hub ( 2 ) which is arranged coaxially with the pulley ( 1 ), and is connected to a rotating shaft ( 3 ) of the rotating device ( 7 ) to rotate as one piece with the rotating shaft ( 3 ),    wherein the hub ( 2 ) is composed of an inner hub ( 21 ) connected to the rotating shaft ( 3 ),    an outer hub( 23 ) engaged to a front-side end face of the pulley ( 1 ),    a torque-transmitting elastic member ( 22 ) connected to both of the inner hub ( 21 ) and the outer hub( 23 ) by intervening between the both hubs ( 21 ,  23 ), and    a hub-side engaging portion ( 24 ) formed at the outer hub( 23 ),    the pulley ( 1 ) has a pulley-side engaging portion ( 12 ) formed at a position corresponding to the outer hub( 23 ) of the front-side end face, and    a torque-transmitting structure of the hub ( 2 ) and the pulley ( 1 ) is formed by allowing the hub-side engaging portion ( 24 ) and the pulley-side engaging portion ( 12 ) to engage,    characterized by    utilizing an elastic member made of an ethylene-propylene-diene copolymer (EPDM) vulcanizable with a peroxide or an elastic member made of an acryl-ethylene copolymer (AEM) vulcanizable with a peroxide for the torque-transmitting elastic member ( 22 ), and    bonding the both hubs ( 21 ,  23 ) made of metal and the torque-transmitting elastic member ( 22 ) with a method for bonding an elastic member to metal according to  claim 1 .    
   
   
       7 . A power transmission device for transmitting a rotational motive power of a driving source to a rotating device ( 7 ) at a passive side, comprising 
 a pulley ( 1 ) which receives a rotational motive power from a driving source to rotate, and    a hub ( 2 ) which is arranged coaxially with the pulley ( 1 ), and is connected to a rotating shaft ( 3 ) of the rotating device ( 7 ) to rotate as one piece with the rotating shaft ( 3 ),    wherein the pulley ( 1 ) has an electromagnetic coil ( 30 ) generating an electromagnetic force via an electricity,    the hub ( 2 ) is composed of an inner hub ( 60 ) connected to the rotating shaft ( 3 ),    an armature ( 50 ) receiving a rotational motive power of the pulley ( 1 ) by being adsorbed to the pulley ( 1 ) via an electromagnetic force generated by the electromagnetic coil ( 30 ), and    a spring-plate member ( 61 ) in a shape of a circular plate which is connected to the inner hub ( 60 ), and generates a spring force in a direction of estranging the armature ( 50 ) from the pulley ( 1 ), and    the armature ( 50 ) and the spring-plate member ( 61 ) are directly connected via an elastic member ( 63 ),    characterized by    utilizing an elastic member made of an ethylene-propylene-diene copolymer (EPDM) vulcanizable with a peroxide or an elastic member made of an acryl-ethylene copolymer (AEM) vulcanizable with a peroxide for the elastic member ( 63 ), and    bonding the armature ( 50  and the spring-plate member ( 61 )) made of metal and the elastic member ( 63 ) with a method for bonding an elastic member to metal according to  claim 1.