US 5,307,708 AGranted

Camshaft for controlling valves in internal combustion engines

AssigneeEtablissement Supervis

InventorLukas Matt

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Abstract

A camshaft for controlling the valves in internal combustion engines, including a shaft 1 and at least one forged cam slid- or pushed-upon the shaft and solidly connected with it, with the cam having an opening for receiving the shaft. The shaft having a segment with an increased diameter at the location of the cam compared to the other regions or segments of the shaft, this region is manufactured rollers or rolls, wherein circumferential beads or webs are generated by material displacement in the circumferential direction of the shaft, the opening in the cam for receiving the shaft is widened in a funnel-shaped manner at least on one side and at least over a portion of its axial length, and the dimension of the mouth aperture of the funnel-shaped widening corresponds approximately to the radial height of the beads or webs.

Claims5

Dependent claims

A cam shaft for controlling valves in internal combustion engines, said cam shaft comprising:

a shaft having a first diameter, and a predetermined axial region having a second diameter, which is greater than the first diameter, wherein the second diameter is defined by a plurality of beads, which are provided at least on a portion of a circumference of said shaft in said predetermined axial region thereof and which have a predetermined radial height determined by a height of a radial projection of said beads beyond the first diameter;
and
at least one forged cam fixedly secured on said shaft in said predetermined axial region thereof and having a through-opening for receiving said shaft, wherein said through-opening has, at one end thereof, a widening cone-shaped portion defining a mouth of said through-opening and having an outer dimension which substantially corresponds to the radial height of said beads in a non-assembled condition of said shaft, wherein a ratio of an axial length of said cone-shaped portion to axial length of said through-opening is approximately 1:5, and wherein said cone-shaped portion has an opening angle of approximately 20.degree..

Dependencies are inferred from the claim text.

Facts

Application: 07/907,253Filed 1 Jul 1992
Priority: DE 41219513 Jul 1991
Granted: 3 May 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F16D 1/0858
With radial clamping between the mating surfaces of the hub and shaft: due to the elasticity of the hub
B23P 11/00
Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise
F01L 1/047
By means of cams, camshafts, cam discs, eccentrics or the like: camshafts
F16H 53/025
Single-track cams for single-revolution cycles; Camshafts with such cams: characterised by their construction, e.g. assembling or manufacturing…