Patent ID: 7784439

Claim:
A variable valve lift apparatus comprising: an outer part; an inner part disposed in the outer part and connected to a proximate end portion of a valve; a latching part that is disposed in the outer part and selectively connects the outer part and the inner part; a camshaft supplying torque of an engine; a low lift cam that is configured to the camshaft and selectively supplies the torque to the inner part; and a high lift cam that is configured to the camshaft and supplies the torque to the outer part; wherein the latching part comprises: a latching pin guide; a latching pin disposed in the latching pin guide; and a latching pin elastic portion that is disposed in the latching pin guide and supplies elastic force to the latching pin, wherein the latching pin locks the inner part when the latching pin receives hydraulic pressure by overcoming a deformation force of the latching pin elastic portion; and wherein the inner part comprises: an inner body that has a cylindrical shape, has at least an inner body spline formed on a circumference of the inner body, and is connected to the proximate end portion of the valve; and an inner body guide that is disposed for accommodating the inner body to reciprocate, wherein the latching pin has at least a latching pin spline formed on an interior circumference thereof and the inner body is disposed complementarily along the interior circumference of the latching pin.