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US 5,724,856 AGranted
Shifter for manual transmissions
AssigneeDaimler-Benz Aktiengesellschaft
InventorOttmar Back
Life of this patent
Estimating the term…
Abstract
In a shifter of a manual transmission, a rotationally and axially movable shifter shaft is provided with a plurality of coupling members that are immovable with respect to it. The members are staggered with respect to one another both axially and in the circumferential direction. A shift fork is used for actuation through a counter-coupling member associated with the fork.
Claims8
A shifting device for manual gear transmission having a main transmission and an additional transmission located in-line in a power flow, comprising:
- a shifter shaft of said main transmission;
- a positioning motor coaxially mounted with said shifter shaft;
- shifter forks of the main transmission;
- a stepping motor arranged in parallel with said shifter shaft, said shifter shaft being coupled with both the positioning motor and the stepping motor;
- coupling members mounted in an offset manner on the shifter shaft, each of said coupling members corresponding with one of said shifter forks, said stepping motor actuating the coupling members into corresponding rotational angle positions via a first auxiliary transmission;
- a shifter roller arranged coaxially with the shifter shaft, said shifter roller being coupled with the stepping motor for actuating an additional shifter fork of the additional transmission via a second auxiliary transmission;
- two free-running clutches having blocking directions opposite relative to one another, one of said two free-running clutches linking the shifter shaft with a coaxial gear of the first auxiliary transmission and another of said two free-running clutches connecting the shifter roller of the additional transmission with another coaxial gear of the second auxiliary transmission.
4 more elements
A shifting device for a manual gear transmission having a multistage main transmission and an additional transmission coupled in-line in a power flow, comprising:
- a shifter shaft, which changes speeds of the main transmission, mounted rotationally and axially movably to provide optional operation of at least two shifter sliding sleeves, each of said at least two shifter sliding sleeves being operated via an associated shifter fork of the main transmission;
- coupling members of a rod coupling mounted immovably with respect to said shifter shaft, said coupling member being engageable with a counter-coupling member of a rod clutch associated with the shifter fork of the main transmission when the shifter shaft is in a neutral position relative to a lengthwise direction of its rotational axis, said coupling member being brought into a rotational angle position associated with a respective shifter fork relative to a circumferential direction of its rotational axis;
- wherein one of said coupling members is associated with each of the shifter forks of the main transmission, each of said coupling members being immovable with respect to the shifter shaft of the main transmission, all of said coupling members being offset with respect to one another in the lengthwise direction relative to the rotational axis of the shifter shaft;
- an auxiliary-force-driven positioning motor for operating the shifter fork to shift the gears of said additional transmission;
- wherein said shifter shaft of the main transmission is coupled with both a coaxially mounted positioning motor to actuate the shifter forks of the main transmission and with a stepping motor located in parallel for actuating the coupling members of the main transmission into the corresponding rotational angle positions through a first auxiliary transmission;
- a shifter roller coaxial with the shifter shaft of the main transmission likewise coupled with the stepping motor for actuating a shifter fork of the additional transmission through a second auxiliary transmission;
- and
- two free-running clutches having blocking directions opposite relative to one another, one of said two free-running clutches being used to link the shifter shaft of the main transmission with a coaxial gear of the first auxiliary transmission, the other of said two free-running clutches being used to connect the shifter roller of the additional transmission with another coaxial gear of the second auxiliary transmission.
5 more elements
Dependencies are inferred from the claim text.