Crank device
AssigneeRobert Bosch GmbH
InventorsJuergen Schneider, Sebastian Amend
Life of this patent
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Abstract
A crank device or crank drive is disclosed which has a crankshaft, into which a variable first force can be introduced by way of a transmission element over a variable first lever spacing. Here, the first variable force has a predefined profile and/or predefined change. A profile of the first variable lever spacing is designed in a manner which is dependent on the predefined profile of the first variable force in such a way that an effect of change in the first variable force on the crankshaft is at least partially compensated for. The compensation is provided over a rotational range of the crankshaft, which is preferably less than one revolution of the crankshaft.
Claims9
A crank device, comprising:
- a crankshaft;
- and
- a transmission element configured to introduce into the crankshaft a first variable force by way of a first variable lever spacing,
- wherein
- the first variable force has a predefined profile,
- a profile of the first variable lever spacing is dependent on the predefined profile of the first variable force such that an effect of change in the first variable force on the crankshaft is at least partially compensated,
- the transmission element comprises a rotary body, the transmission element is fixed to the crankshaft, a first outer circumferential portion of the rotary body has a first monotonic changing spacing from the crankshaft, and the first monotonic changing spacing defines the first variable lever spacing,
- the transmission element is configured to introduce a second variable force into the crankshaft via a second variable lever spacing,
- a second outer circumferential portion of the rotary body has a second monotonic changing spacing from the crankshaft, and the second monotonic changing spacing defines the second variable lever spacing, and
- the first and second outer circumferential portions of the rotary body are point-symmetrical to the crankshaft.
Dependencies are inferred from the claim text.