Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1987-07-30
1989-08-15
Diehl, Dwight G.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74713, 74714, F16H 3706, F16H 3708
Patent
active
048563706
DESCRIPTION:
BRIEF SUMMARY
This invention relates to mechanical devices of the type to be used in camshaft management systems, and any situation wherein it is considered desirable for one shaft, or associated component, to be subjected to phase alteration, or adjustment, in relation to another shaft or component, or group of components.
The ability to provide advance/retard characteristics in respect of rotating shafts and/or assemblies, enables the internal combustion engine designer to contemplate engines capable of higher power outputs, lower specific fuel consumptions, and cleaner exhaust emission profiles. In short, the ability to vary the valve timing alone, i.e. the shaft advance/retard status, will, in itself, offer considerable environmental and performance advantages.
The devices included in this specification are examples of the basic invention, and are embodiments slanted towards the automotive industry. However, their ability to provide variable phase coupling allows the inclusion to be contemplated in respect of a much wider envelope; i.e. they can be used in any situation wherein it is necessary, or desirable, to vary the rotational status of a component, or shaft, in rotational relationship with another.
According to the present invention there is provided an assembly capable of producing phase alteration between two rotatable members in which a first rotatable member acts, through a bearing contact, on a second rotatable member in order to impart rotation to a third rotatable member, the second rotatable member being coupled to the third rotatable member by a drive element rotatable with the third rotatable member, and drive means, drivingly engaged with the second rotatable member, comprising actuating means for imparting rotational movement to a fourth rotatable member to provide a relative change of phase between the first and third rotatable members.
According to a second embodiment of the present invention there is provided an assembly capable of producing phase alteration between two rotatable members comprising a first rotatable member acting on a second rotatable member in order to impart rotation to a third rotatable member and a drive mechanism engaging with the second rotatable member and comprising actuating means to reposition an associated drive member in order to introduce rotational adjustment or drive to the second rotatable member in order to provide a relative change of phase between the first rotatable member and the third rotatable member.
For a better understanding of the present invention, and to show how the same may be put into effect, reference will now be made by way of example, to the accompanying drawings, in which:
FIG. 1 is a basic example of one embodiment of the principles of the invention;
FIG. 2 is a variation on FIG. 1 including only four geared items;
FIG. 3 is a further variation on FIG. 1;
FIG. 4 shows a clutching device encompassing the principles of the invention.
Referring now to the drawings FIG. 1 is a design concerned with camshaft phase variation. The camshaft 1 is bearing located along the center rotational datum axis of the device, and is fixed to, or part of, bevelled gear F. Camshaft 1 is extended to form shafts 1b, 1a and 1c, these being fixed to, or part of camshaft 1. Collar 1d is likewise fixed to, or part of camshaft 1. Gear A is mounted upon sleeve shaft 2, which is concentrically bearing located upon camshaft 1, both shafts passing through the main journal housing 11.
Compound idler-bevels B and E are fixed to, or part of axle 4, and compound idler-bevels C and D are fixed to, or part of, axle 5. The assemblies (B/4/E) and (C/5/D) are free-running and bearing located radially within free-running carrier 8. Gears B and C are engaged with gear A, and gears E and D are engaged with gear F. A sprocket 6 is free-running upon shaft 1a and is mounted upon a concentric sleeve-shaft and held in bearing contact by the collar 1d. Fixed to the sleeve-shaft (this being fixed to, or part of the sprocket 6), is the carrier 8 which provides the radial bearing locations for th
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