Abstract: An Oldham coupling includes an engagement arm. At least either a driving-side rotor or an input gear has an engagement portion engaged with the engagement arm and is connected to the Oldham coupling. The engagement arm has a pair of arm flat surface portions perpendicular to a rotational direction of the driving-side rotor. The engagement portion has a pair of engagement flat surface portions that the arm flat surface portions face in a sliding contact manner. Each arm flat surface portion is, within a range where the arm flat surface portion slides against a facing engagement flat surface portion, always in contact with an overlapping portion of the engagement flat surface portion with the arm flat surface portion when viewed from a direction perpendicular to a sliding direction of the Oldham coupling and in which the arm flat surface portion and the engagement flat surface portion overlap each other.

Abstract: A valve opening-closing timing control apparatus includes a phase adjustment mechanism. The phase adjustment mechanism includes an input gear and an elastic member that applies biasing force to the input gear in such a way that the input gear meshes with an output gear. An eccentric member includes one first concave portion along a circumferential direction thereof, being formed on an outer circumferential surface. The elastic member includes a supported portion supported by the first concave portion, and a curved portion and a biasing piece portion that generate biasing force. The elastic member is supported by the first concave portion at two different boundaries in the circumferential direction.

Abstract: An Oldham coupling includes an engagement arm. At least either a driving-side rotor or an input gear has an engagement portion engaged with the engagement arm and is connected to the Oldham coupling. The engagement arm has a pair of arm flat surface portions perpendicular to a rotational direction of the driving-side rotor. The engagement portion has a pair of engagement flat surface portions that the arm flat surface portions face in a sliding contact manner. Each arm flat surface portion is, within a range where the arm flat surface portion slides against a facing engagement flat surface portion, always in contact with an overlapping portion of the engagement flat surface portion with the arm flat surface portion when viewed from a direction perpendicular to a sliding direction of the Oldham coupling and in which the arm flat surface portion and the engagement flat surface portion overlap each other.

Abstract: A valve opening-closing timing control apparatus includes a phase adjustment mechanism. The phase adjustment mechanism includes an input gear and an elastic member that applies biasing force to the input gear in such a way that the input gear meshes with an output gear. An eccentric member includes one first concave portion along a circumferential direction thereof, being formed on an outer circumferential surface. The elastic member includes a supported portion supported by the first concave portion, and a curved portion and a biasing piece portion that generate biasing force. The elastic member is supported by the first concave portion at two different boundaries in the circumferential direction.

Abstract: A phase adjustment mechanism for setting a relative rotational phase of a driven-side rotational body to a drive-side rotational body of a valve opening-closing timing control device includes a output gear around a rotational axis, an input gear being rotated around an eccentric axis, and an eccentric member. The eccentric member includes an outer peripheral surface with a first arc portion, a second arc portion, a plate spring fitted between the first arc portion and the second arc portion, and a spaced portion. Each of the first arc portion and the second arc portion is disposed from a position less than 90 degrees to a position more than 90 degrees as a central angle with respect to the eccentric axis from a biasing direction of the plate spring in the peripheral direction.

Abstract: A phase adjustment mechanism for setting a relative rotational phase of a driven-side rotational body to a drive-side rotational body of a valve opening-closing timing control device includes a output gear around a rotational axis, an input gear being rotated around an eccentric axis, and an eccentric member. The eccentric member includes an outer peripheral surface with a first arc portion, a second arc portion, a plate spring fitted between the first arc portion and the second arc portion, and a spaced portion. Each of the first arc portion and the second arc portion is disposed from a position less than 90 degrees to a position more than 90 degrees as a central angle with respect to the eccentric axis from a biasing direction of the plate spring in the peripheral direction.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotator disposed rotatably about a rotation axis and configured to rotate synchronously with a crankshaft of an internal combustion engine; a driven side rotator disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening and closing camshaft of the internal combustion engine; and a phase adjustment mechanism configured to set a relative rotation phase between the driving side rotator and the driven side rotator by a driving force of an electric actuator. The phase adjustment mechanism includes: an internally toothed ring gear; an inner gear; and a drive shaft, and the valve opening and closing timing control apparatus further includes: a biasing member; and a displacement regulation portion.

Abstract: A phase adjustment mechanism is constructed as a differential deceleration mechanism where a ring gear is relatively rotated on a basis of a difference in the number of teeth between the ring gear and an inner gear by revolution of an eccentric axis with reference to a rotation axis by an electric actuator. A coupling member is provided including a first engagement portion engaging with a driving-side rotational member in a displaceable manner in a first direction serving as a radial direction and a second engagement portion engaging with the inner gear in a displaceable manner in a second direction orthogonal to the first direction.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotator disposed rotatably about a rotation axis and configured to rotate synchronously with a crankshaft; a driven side rotator disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening/closing camshaft; a phase adjustment mechanism configured to set a relative rotation phase between the driving side and driven side rotators by a driving force of an electric actuator, a biasing member provided on an outer periphery of a drive shaft to apply a biasing force in a direction such that an inner gear is engaged with a ring gear; and a displacement regulation portion configured to regulate a displacement of the inner gear.

Abstract: A phase adjustment mechanism is constructed as a differential deceleration mechanism where a ring gear is relatively rotated on a basis of a difference in the number of teeth between the ring gear and an inner gear by revolution of an eccentric axis with reference to a rotation axis by an electric actuator. A coupling member is provided including a first engagement portion engaging with a driving-side rotational member in a displaceable manner in a first direction serving as a radial direction and a second engagement portion engaging with the inner gear in a displaceable manner in a second direction orthogonal to the first direction.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotator disposed rotatably about a rotation axis and configured to rotate synchronously with a crankshaft of an internal combustion engine; a driven side rotator disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening and closing camshaft of the internal combustion engine; and a phase adjustment mechanism configured to set a relative rotation phase between the driving side rotator and the driven side rotator by a driving force of an electric actuator. The phase adjustment mechanism includes: an internally toothed ring gear; an inner gear; and a drive shaft, and the valve opening and closing timing control apparatus further includes: a biasing member; and a displacement regulation portion.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotator disposed rotatably about a rotation axis and configured to rotate synchronously with a crankshaft; a driven side rotator disposed rotatably about the rotation axis and configured to be rotatable relative to the driving side rotator and to rotate integrally with a valve opening/closing camshaft; a phase adjustment mechanism configured to set a relative rotation phase between the driving side and driven side rotators by a driving force of an electric actuator, a biasing member provided on an outer periphery of a drive shaft to apply a biasing force in a direction such that an inner gear is engaged with a ring gear; and a displacement regulation portion configured to regulate a displacement of the inner gear.