Patent ID: 8826872
Filing Date: 2014-09-09
Classification: F01L,F16J

Abstract:
1. A valve opening/closing timing control device, comprising: a drive-side rotating body, which synchronously rotates relative to a crankshaft; a driven-side rotating body, which is arranged coaxially with respect to the drive-side rotating body and which synchronously rotates with a camshaft for opening/closing a valve in an internal combustion engine; a partition section, which is provided to at least one of the drive-side rotating body and the driven-side rotating body so as to partition a fluid pressure chamber, which is formed by the drive-side rotating body and the driven-side rotating body, into a retard chamber and an advance chamber; a seal member, which is arranged either at a position, of the partition section, facing the drive-side rotating body or the driven-side rotating body, or at a position, of the drive-side rotating body or the driven-side rotating body, facing the partition section, and which prevents leakage of a working fluid between the retard chamber and the advance chamber caused by a relative rotation between the drive-side rotating body and the driven-side rotating body; and a biasing member comprising: a first biasing section, which either biases the seal member from the partition section side towards the drive-side rotating body side or the driven-side rotating body side, or biases the seal member from the drive-side rotating body side or the driven-side rotating body side towards the partition section side; and a second biasing section, which engages with the seal member by a biasing force caused by elastic deformation of the second biasing section, wherein the first biasing section and the second biasing section are formed by a wire spring having a curvature, and the biasing member engages the seal member by a biasing force of the second biasing section caused by the curvature of the wire spring, and the second biasing section engages the biasing member with the seal member by exerting the biasing force in a circumferential direction of the drive-side rotating body or the driven-side rotating body, the circumferential direction being different from a biasing direction of the first biasing section.