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AssigneeCrown Gear B.V.
InventorsAugustinus F.H. Basstein, Anne Lourens Sijtstra, Gustaaf A. Uittenbogaart
Estimating the term…
In a face gear transmission with a cylindrical pinion and a face gear meshing therewith the toothing of the face gear is derived from a theoretical profile (22) of a pinion with an infinitely small thickness by moving the centre of this pinion along an imaginary axis which the coincides with the axis of rotation of the cylindrical pinion. The teeth of the face gear are crowned so as to achieve the required tooth clearance. The shape of the teeth of the face gear is such that upon the movement of the theoretical pinion profile (22) in the direction of the imaginary axis of rotation, starting from a defined diameter between the maximum and the minimum diameter of the toothing of the face gear, the centre of the theoretical pinion profile undergoes a displacement (P.sub.1, P.sub.2) at the same time at right angles to the imaginary axis of rotation in the direction towards the toothing of the face gear.
Gear transmission for coupling in a fixed ratio a rotation of a first axis of rotation to a rotation of a second axis of rotation;
Face gear which can mesh with a cylindrical pinion with a tooth angle, said face gear being provided with a toothing which runs from a minimum diameter D.sub.min, where the toothing has a profile with a minimum pressure angle .alpha..sub.min, to a maximum diameter D.sub.max, where the toothing has a profile with a maximum pressure angle .alpha..sub.max, and which toothing is derived from a theoretical pinion profile rotating about an imaginary axis of rotation and corresponding to the toothing of the cylindrical pinion with which the face gear can mesh, wherein the shape of the toothing of the face gear is such that an infinitely thin cross-section of the theoretical pinion profile remains in mesh with the toothing if the centre of said theoretical pinion profile lying on the imaginary axis of rotation moves in a plane (V), in which the imaginary axis of rotation lies and which is parallel to the axis of rotation of the face gear, from the position at which meshing at a defined diameter D.sub.d on the face gear occurs in the direction of the imaginary axis of rotation, and during that rotates through an angle corresponding to said movement, which angle is determined by the movement and the tooth angle, and at the same time moves over a distance (p.sub.1, p.sub.2) in the direction towards the toothing of the face gear at right angles to the imaginary axis of rotation.
Dependencies are inferred from the claim text.