Machine element or mechanism – Gearing – Interchangeably locked
Patent
1994-04-21
1996-02-27
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
74359, F16H 3087, B60K 1708
Patent
active
054939275
ABSTRACT:
The invention relates to a gearbox switchable under load, which has an input shaft coupled to at least one further shaft, which extends parallel to the input shaft, via pairs of gearwheels to achieve different gear stages. One gearwheel of each pair of gearwheels is rotatively fixedly connected to one of the two shafts and the other gearwheel of each pair of gearwheels is optionally rotatively fixedly connectable to the other of the two shafts by a respective friction coupling. Also, in the gearbox, the input shaft is rotatively fixedly connected to an engine shaft; mechanism to reverse the direction of rotation is provided in the torque flow from the input shaft to the output pinion; and mechanism for approximately simultaneously loading the friction couplings of the two lowest gear stages is provided and for starting purposes when driving forward and reversing, the torque flow through both friction couplings is maintained, at most, until an identical speed has been reached between the elements of the friction coupling of the lowest gear stage.
REFERENCES:
patent: 4635495 (1987-01-01), White
patent: 4855913 (1989-08-01), Brekkestran et al.
patent: 4960005 (1990-10-01), Kashiwase
patent: 4998443 (1991-03-01), Janiszewski
patent: 5031473 (1991-07-01), Yumoto et al.
patent: 5035682 (1991-07-01), Nakayama et al.
patent: 5078249 (1992-01-01), Botterill
patent: 5186065 (1993-02-01), Downs
Botterill John R.
Hulsebusch Karl-Heinz
GKN Automotive AG
Wright Dirk
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