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US 8,608,610 B2Granted
Transmission unit
AssigneePinion GmbH
InventorsMichael Schmitz, Christoph Lermen
Life of this patent
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AssigneePinion GmbH
InventorsMichael Schmitz, Christoph Lermen
Estimating the term…
The present invention relates to a transmission unit for a vehicle driven by muscle force, comprising an input shaft which can be connected to cranks on opposite sides for driving the vehicle, comprising a first partial transmission. The first partial transmission comprises a countershaft, wherein a plurality of driving gear wheels is mounted on the input shaft, and wherein a corresponding plurality of driven gear wheels of the first partial transmission is mounted on the partial transmission shaft. The driven gear wheels of the first partial transmission are designed as idler gears that can be connected to the countershaft by means of shifting means in a rotationally rigid manner. The countershaft forms an input shaft of a second partial transmission. A plurality of second drive wheels are mounted on the output shaft, wherein the second partial transmission comprises an output shaft, on which a corresponding plurality of second driven gear wheels are mounted.
A shifting device for a transmission unit of a vehicle operated by muscle force, having a first shaft on which a plurality of idler gears is mounted, a corresponding number of gearwheels, wherein the idler gears and the gearwheels form wheel pairs of two partial transmissions connected in series to each other, wherein the gearwheels of each of the two partial transmissions are mounted on one respective shaft, wherein a shifting assembly is associated to each of the idler gears and wherein the idler gears can each be connected rotationally fixed to the first shaft by means of the respective shifting assembly, wherein the first shaft is formed as a hollow shaft having two shifting pins each assigned to the shifting assemblies of one of the two partial transmissions, wherein the shifting pins are arranged coaxially on the inside of the hollow shaft, wherein the shifting pins have actuation portions by means of which the shifting assemblies can be actuated and wherein the actuation portions are connected rotationally fixed to the shifting pin, wherein the shifting pins are each connected to a driving device which is configured to rotate the shifting pins in order to actuate the respective shifting assemblies of the two partial transmissions independently, wherein the driving device is configured to rotate the corresponding shifting pin and the connected actuation portions by means of a planetary gear mechanism synchronously with respect to the first shaft in order to maintain a shifted state of the shifting assemblies and to rotate the shifting pin in relation to the first shaft in order to carry out a gear change, wherein the shifting assemblies are formed as shiftable freewheels, and wherein the actuation portions are arranged on the shifting pin in such a way that the freewheels of two successive gear stages can be actuated simultaneously.
A shifting device for a transmission unit of a vehicle operated by muscle force, having a first shaft on which a plurality of idler gears is mounted, a corresponding number of gearwheels, which are mounted on at least one second shaft, wherein a shifting assembly is associated to each of the idler gears and wherein the idler gears can each be connected to the first shaft by means of the respective shifting assembly, wherein the first shaft is formed as a hollow shaft having two shifting pins which are arranged coaxially on the inside, wherein the shifting pins have a plurality of actuation portions by means of which the shifting assemblies can be actuated, wherein the actuation portions are connected rotationally fixed to the shifting pins, wherein the shifting pins are connected to a driving device which is configured to rotate the corresponding shifting pin and the actuation portions synchronously with respect to the first shaft in order to maintain a shifted state of the shifting assemblies and to rotate the shifting pins and the actuation portions in relation to the first shaft in order to carry out a gear change.
A shifting device for a transmission unit of a vehicle operated by muscle force, having a first shaft on which a plurality of idler gears is mounted, a corresponding number of gearwheels, which are mounted on at least one second shaft, wherein a shifting assembly is associated to each of the idler gears and wherein the idler gears can each be connected to the first shaft by means of the respective shifting assembly, wherein the first shaft is formed as a hollow shaft having a shifting pin which is arranged coaxially on the inside, wherein the shifting pin has a plurality of actuation portions by means of which the shifting assemblies can be actuated, wherein the actuation portions are connected rotationally fixed to the shifting pin, wherein the shifting pin is connected to a driving device which is configured to rotate the shifting pin and the actuation portions synchronously with respect to the first shaft in order to maintain a shifted state of the shifting assemblies and to rotate the shifting pin and the actuation portions in relation to the first shaft in order to carry out a gear change.
Dependencies are inferred from the claim text.