Valve timing control device having vane rotor

Abstract

A valve timing control device includes a housing, a vane rotor, a coil spring, a hooking member, and a securing member. The housing rotates with a driving shaft, and defines accommodation chambers that include island portions to be circumferentially adjacent to each other. The vane rotor includes a vane portion, which is restricted in rotation within a predetermined rotative angular range defined by the plurality of island portions in the accommodation chambers. The coil spring has one end, which hooks on the housing, and has the other end, which hooks on the vane rotor to bias the vane rotor to an advanced angular side with respect to the housing. The hooking member circumferentially hooks on the one end. The securing member secures a driving force transmission member to the housing. The hooking member and the securing member are provided to the island portion, and are arranged in this order along a direction, in which resilience of the coil spring works.

1 . A valve timing control device that is provided to a driving force transmission system, which transmits driving force from a driving shaft of an internal combustion engine to a driven shaft, the driven shaft opening and closing at least one of an intake valve and an exhaust valve, the valve timing control device controlling an opening timing and a closing timing of at least one of the intake valve and the exhaust valve, the valve timing control device comprising: 
 a housing member that rotates with one of the driving shaft and the driven shaft, the housing member defining a plurality of accommodation chambers that includes a plurality of island portions to be adjacent to each other in a circumferential direction of the plurality of accommodation chambers;    a vane rotor member that is accommodated in the plurality of accommodation chambers, the vane rotor member including a vane portion, which is restricted in rotation within a predetermined rotative angular range defined by the plurality of island portions;    a torsion coil spring that has one end that hooks to the housing member, the torsion coil spring having an other end that hooks to the vane rotor member, the torsion coil spring biases the vane rotor member to one of an advanced angular side and a retarded angular side with respect to the housing member;    a hooking member that circumferentially hooks on the one end of the torsion coil spring, the one end of the torsion coil spring extending to a radially outer side; and    a securing member that secures a member of the driving force transmission system to the housing member,    wherein the hooking member and the securing member are provided to at least one of the plurality of island portions, and    the hooking member and the securing member are arranged in this order along a direction, in which resilience of the torsion coil spring works.    
   
   
       2 . The valve timing control device according to  claim 1 , 
 wherein the securing member is a bolt that has a bolt head, and    the bolt head contacts with the hooking member.    
   
   
       3 . The valve timing control device according to  claim 2 , 
 wherein the hooking member includes a shank portion and a disc portion,    the shank portion of the hooking member is inserted into the at least one of the plurality of island portions,    the disc portion is provided to a tip end of the shank portion of the hooking member,    the disc portion has a diameter that is larger than a diameter of the shank portion of the hooking member, and    the shank portion of the hooking member contacts with a radially outer periphery of the bolt head.    
   
   
       4 . The valve timing control device according to  claim 3 , wherein the disc portion of the hooking member contacts with the bolt head in an axial direction.  
   
   
       5 . The valve timing control device according to  claim 1 , 
 wherein the housing member is formed in a substantially cylindrical shape,    the housing member includes a shoe housing portion and a front plate portion,    the shoe housing portion includes the plurality of island portions,    the front plate portion is arranged at a tip end of the shoe housing portion,    the securing member is capable of being inserted into the shoe housing portion and the front plate portion, and    the securing member protrudes from the front plate portion in an axial direction.    
   
   
       6 . The valve timing control device according to  claim 1 , wherein the one end of the torsion coil spring, the hooking member, and the securing member are arranged in this order along the direction, in which resilience of the torsion coil spring works.  
   
   
       7 . The valve timing control device according to  claim 1 , 
 wherein the member of the driving force transmission system includes a sprocket portion that is constructed of a bush portion and a sprocket, and    the bush portion rotatably receives the driven shaft.