Variable camshaft assembly
AssigneeMechadyne PLC
InventorIan Methley
Life of this patent
Estimating the term…
Abstract
A variable camshaft assembly has a first cams 18a, 18b that can be moved relative to a second cam 16. The assembly comprising a tube 14 fast in rotation with the first cam 18 and rotatably supporting the second cam 16 and a drive shaft 12 disposed within the tube 14 and coupled for rotation with the second cam 16 by means of a connecting pin 20 that passes with clearance through a hole 24 in the tube 14. The connecting pin is a hollow pin 20 that is a sliding fit in the second cam 16 and that is expanded in situ to form an interference with the drive shaft 12.
Claims10
A method of assembling a variable camshaft assembly having a first cam lobe that can be moved relative to a second cam lobe, the assembly comprising a tube to which the first cam lobe is fixed and about which the second cam lobe is free to rotate, a drive shaft that passes through the bore of the tube and a connecting pin that passes with clearance through an aperture in the tube to couple the second cam lobe for rotation with the drive shaft, which method comprises inserting into holes in the second cam lobe and in the drive shaft a hollow connecting pin having a constant outer diameter dimensioned to be a close fit in the holes, and expanding the outer diameter of the connecting pin only within the region of the pin that lies within the drive shaft so that an interference fit is generated with the drive shaft.
A variable camshaft assembly having a first cam that can be moved relative to a second cam, the assembly comprising a tube fast in rotation with the first cam and rotatably supporting the second cam and a drive shaft disposed within the tube and coupled for rotation with the second cam by means of a connecting pin that passes with clearance through a hole in the tube, wherein the connecting pin is a hollow pin that is a sliding fit in the second cam and that is expanded in situ to form an interference with the drive shaft.
Dependencies are inferred from the claim text.