Arrangement for reducing rattling in a transmission
AssigneeZF Friedrichshafen AG
InventorRayk Hoffmann
Life of this patent
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Abstract
An arrangement for reducing rattling in a transmission of counter shaft design having first countershafts (3, 4) and a load-equalizing main shaft (7) in which each transmission ratio step comprises a loose wheel (6), arranged on the main shaft (7), and a respective fixed wheel (5) arranged on each of the first and second countershafts (3, 4) which are in active engagement with one another. Activation of the transmission ratios occurs by actuating a shift element (8) such that the respective loose wheel can be connected, in a rotationally fixed manner, to the main shaft (7). In this arrangement the oil pump (13) of the transmission is mounted on the main shaft (7).
Claims5
An arrangement, for reducing rattling in a transmission of countershaft design, comprising:
- first and second countershafts (3, 4), and
- a load-equalizing main shaft (7),
- in which individual gears are produced by activating, in each case, a transmission ratio step comprising a loose wheel (6) arranged on the main shaft (7) and a respective fixed wheel (5) arranged on each of the first and second countershafts (3, 4) which are in active engagement with one another;
- the activation of the transmission ratios taking place by actuating a shift element (8) by which the respective loose wheel is connected, in a rotationally fixed manner, to the main shaft (7);
- and
- an oil pump (13) of the transmission being arranged on the main shaft (7).
A transmission arrangement comprising:
- first and second countershafts (3, 4), each having a reverse gear wheel (5) and plurality of other gear wheels (5) rotationally fixed thereto;
- a load-equalizing main shaft (7) supporting a reverse loose gear wheel (6), a plurality of other loose gear wheels (6) and a plurality of shift elements (8), the reverse loose gear wheel (6) communicating with the reverse gear wheels (5) forming a reverse gear assembly (12), each of the loose gear wheels (6) being engagable, via one of the shift elements (8), with respective gear wheels (5) of the countershafts (3, 4) to engage an associated gear ratio;
- and
- a transmission oil pump (13) being supported on and driven by the main shaft (7), axially adjacent the reverse gear assembly (12).
Dependencies are inferred from the claim text.