| CPC F16H 37/08 (2013.01) [F16H 48/06 (2013.01); F16H 57/082 (2013.01); F16H 57/10 (2013.01)] | 20 Claims |
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1. A mechanical interconnection of multiple rotatable devices, comprising:
a gear train for transmitting or interchanging speed and/or torque between the rotatable devices,
at least three rotatable devices coupled to the gear train for directly driving an output load through the gear train without intermediate power transfer elements;
wherein the gear train of the mechanical interconnection of multiple rotatable devices comprises:
one or more first stages; and
one or more second stages,
wherein each of the one or more first stages is coupled to one of the one or more second stages and is configured as either a speed reducer with a gear ratio greater than 1:1 or a speed increaser with a gear ratio smaller than 1:1, serving as a pre-gearing for connecting a first rotatable device and a second rotatable device of the at least three rotatable devices, both being connected to a second stage and at least one of the first rotatable device and the second rotatable device connected to the concerned second stage by the first stage;
wherein each second stage is a differential gearing comprising a planetary gear train system which is executed in a duplicated form composed of an input side and an output side, comprising respectively a first set of planetary gearing and a second set of planetary gearing, which are structurally mirrored but dimensionally offset to achieve distinct gear ratios,
wherein the first set of planetary gearing and the second set of planetary gearing together include at least three matched duos of two elements, each of the at least three matched duos consisting of a first element from the first set of planetary gearing and a second element from the second set of planetary gearing,
wherein each of the first element and the second element of each of the at least three matched duos is either geared element or a planetary carrier,
wherein the at least three matched duos comprise at least a duo of planet carriers and a duo of planet gears,
wherein the first set of planetary gearing and the second set of planetary gearing interact respectively with first interacting gearing and the second interacting gearing of respectively the input side and the output side and which the first set of planetary gearing and the second set of planetary gearing are supported in a rotatable manner either each on a separate planet carrier or together on a common planet carrier, each of the first planetary gearing and the second set of planetary gearing being composed of a number of planetary gearing elements which are disposed circumferentially and spaced from one another on their supporting planet carrier, at least a first duo of the at least three matched duos being linked to form a linking mechanism between the first set of planetary gearing and the second set of planetary gearing for transmission of torque and/or speed between the input side and the output side;
wherein at least a first element, selected from the group consisting of a geared element and a planet carrier, of a second duo of the at least three matched duos of at least one of the second stages is forming a torque resisting or torque controlling means in that it is permanently blocked or impeded in a controllable way or provides a controllable torque to the gear train of the mechanical interconnection of multiple rotatable devices; and,
wherein a third rotatable device of the at least three rotatable devices is directly driving at least one second element, selected from the group consisting of a geared element and a planetary carrier, of the second duo of at least one of the second stages,
wherein a differential gain-K, or K, of the operating pitch diameters of the elements of the afore-mentioned at least three duo's fulfils:
K∈[0,7−1[∪]1−1,4];
wherein the differential gain-K is defined as:
K=(D2,a/D1,a)*(D1,b/D2,b) for ring or sun differential gearings,
wherein:
D2,a is the operating pitch diameter of the element of the aforementioned second duo belonging to the first set of planetary gearing;
D1,a is the operating pitch diameter of the element of the aforementioned first duo belonging to the first set of planetary gearing;
D2,b is the operating pitch diameter of the element of the aforementioned second duo belonging to the second set of planetary gearing;
D1,b is the operating pitch diameter of the element of the aforementioned first duo belonging to the second set of planetary gearing;
wherein the differential gain-K is defined as:
K=(D1,a/(D2,a−D3,b))*((D2,b−D3,b)/D1,b) for carrier differential gearings,
wherein:
D2,a is the operating pitch diameter of the element of the aforementioned second duo belonging to the first set of planetary gearing;
D1,a is the operating pitch diameter of the element of the aforementioned first duo belonging to the first set of planetary gearing;
D2,b is the operating pitch diameter of the element of the aforementioned second duo belonging to the second set of planetary gearing;
D1,b is the operating pitch diameter of the element of the aforementioned first duo belonging to the second set of planetary gearing;
D3,a is the operating pitch diameter of the element of the afore-mentioned third duo belonging to the first set of the planetary gearing when the first duo comprises a set of two rings;
D3,b is the operating pitch diameter of the element of the afore-mentioned third duo belonging to the second set of the planetary gearing when the first duo comprises a set of two rings;
D3,a is the negative of the operating pitch diameter of the element of the afore-mentioned third duo belonging to the first set of the planetary gearing when the first duo comprises a set of two sun gears;
D3,b is the negative of the operating pitch diameter of the element of the afore-mentioned third duo belonging to the second set of the planetary gearing when the first duo comprises a set of two sun gears;
wherein the differential gain-K is defined as:
K=(D2,a/(D3,b))*((D3,b)/D2,b) for complex carrier differential gearings,
wherein:
D2,a is the operating pitch diameter of the element of the aforementioned second duo belonging to the first set of planetary gearing;
D2,b is the operating pitch diameter of the element of the aforementioned second duo belonging to the second set of planetary gearing;
D3,a is the operating pitch diameter of the element of the afore-mentioned third duo belonging to the first set of the planetary gearing, whereby the third duo is a duo of planet gears;
D3,b is the operating pitch diameter of the element of the afore-mentioned third duo belonging to the second set of the planetary gearing, whereby the third duo is a duo of planet gears.
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