Eccentric drive for a portable handheld work apparatus
AssigneeAndreas Stihl AG & Co. KG
InventorsThomas Stark, Florian V. Krane
Life of this patent
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Abstract
The invention relates to an eccentric drive (1) and especially to an eccentric drive for a portable handheld work apparatus having a wheel (3) driven by a drive motor (2). A cam (5) is eccentrically fixed to an end face (4) of the wheel (3). The cam (5) is held by a connecting rod (6) and cylinder-shaped roller bodies (7) are mounted between the connecting rod (6) and the cam (5). The roller bodies (7) have axial ends (8) which engage in an annular slot (9) of the wheel (3). A holding element (11) is disposed on the cam (5) and limits the axial play of the roller bodies (7).
Claims12
An eccentric drive for a work apparatus, the eccentric drive comprising:
- a wheel defining a rotational axis and having an end face;
- a cam fixedly mounted eccentrically on said end face so as not to be rotatable relative to said wheel;
- a drive motor for driving said wheel to rotate about said rotational axis;
- a connecting rod having a connecting rod eye for receiving said cam therein so as to cause said connecting rod eye and said cam to conjointly define an interface therebetween;
- a plurality of roller bodies disposed at said interface to define a roller bearing between said cam and said connecting rod eye;
- said wheel having an annular slot disposed in surrounding relationship to said cam;
- each of said roller bodies having a first axial end engaging said annular slot;
- a holder having an edge and being fixed on said cam;
- each of said roller bodies having a second axial end adjacent said holder;
- and,
- said roller bodies projecting radially beyond said edge of said holder.
Dependencies are inferred from the claim text.