Gearbox device for an agricultural machine comprising a primary shaft, a secondary shaft, at least one intermediate shaft, and a motion transmission element moveable between at least two operating positions in which it sets up intermeshing drive lines between the primary shaft and the secondary shaft with different gear ratios, at least one of the drive lines incorporating the intermediate shaft, the motion transmission element passing through at least one neutral position during its movement between the at least two aforementioned operating positions, wherein the gearbox device comprises a manually-operated pivoting means that makes it possible to make at least one of the primary, secondary, and intermediate shafts pivot around its rotation axis when the motion transmission element is in the neutral position.

A planetary gearbox including a first planetary gear assembly, a second planetary gear assembly, and a disconnect assembly. The first planetary gear assembly includes a first sun gear, a first carrier, at least one first planet gear mounted in the first carrier, and a ring gear. The second planetary gear assembly includes a second sun gear, a second carrier, at least one second planet gear mounted in the second carrier, and the ring gear. The disconnect assembly includes a disconnect member and a connecting member. The disconnect member is coupled to the second carrier of the second planetary gear assembly, and the connecting member is coupled to both the disconnect member and the movable second sun gear.

The invention relates to an epicyclic reducer for a vehicle hub that includes: a housing; a sun gear arranged in the housing that includes sun teeth and is configured for coupling to an input; a plurality of planet gears, each of which includes planet teeth meshed with some of the sun teeth; a planet carrier that couples the planet gears to each other and is configured as an output; and a ring gear that includes ring teeth meshed with some of the planet teeth of each of the planet gears. The ring gear can be moved within the housing between a reduction position in which the planet gears are configured to rotate relative to the ring gear, and a direct drive position in which the ring gear is constrained to rotate with the planet gears.

A transmission comprising at least one rim 1 and at least one wheel 2. An outside surface of the wheel 2 is adapted to engage with an inside surface of the rim 1. The wheel 2 is rotatable about a first axis B and the rim 2 is rotatable about a second axis A. The second axis A is at a distance from the first axis B. The inside surface of the rim 1 has a cyclic polygonal shape with an angle between each adjoining side 4 of the polygon being greater than 90°. The outer surface of the wheel 2 has a cyclic polygonal shape with an angle between each adjoining side 6 of the polygon being greater than 90°. Each side 6 of the wheel 2 engaging with a side 4 of the rim 1 of equal length during rotation of said transmission.

A power transmission apparatus may include a motor/generator having a rotor selectively connectable to an engine output shaft, a first input shaft mounted along an axis of the engine output shaft and fixedly connected to the rotor, a second input shaft external and selectively connectable to the first input shaft, first and second intermediate shafts and an output shaft mounted in parallel with the input shafts, a planetary gear set mounted on the output shaft, having a sun gear fixedly connected to the output shaft, selectively receiving torques from the first and second input shafts and the first and second intermediate shafts, and outputting the shifted torque based on the received torques to the output shaft, and a plurality of gear sets allowing torque flows between the first and second input shafts, the first and second intermediate shafts, and the output shaft.

A power transmission apparatus may include a motor/generator having a rotor selectively connectable to an engine output shaft, a first input shaft mounted along an axis of the engine output shaft and fixedly connected to the rotor, a second input shaft external and selectively connectable to the first input shaft, first and second intermediate shafts and an output shaft mounted in parallel with the input shafts, a planetary gear set mounted on the output shaft, having a sun gear fixedly connected to the output shaft, selectively receiving torques from the first and second input shafts and the first and second intermediate shafts, and outputting the shifted torque based on the received torques to the output shaft, and a plurality of gear sets allowing torque flows between the first and second input shafts, the first and second intermediate shafts, and the output shaft.

An Amphibious Vehicle (AV) is capable of planing with less power than prior similar size amphibious vehicles and using mostly off-the-shelf part. The AV uses an outdrive and propellor instead of a pump, and also include leading rear wheel well flaps which are spring biased forward against the hull bottom for on-road use, and pivot back to fill a gap between the hull and rear tire, reducing drag during in-water use. The combination of the propellor and wheel well flap allows planing with less horse power. An engine faces to the rear and either reversing differentials to reversing carrier and hubs provide correct wheel rotation. A reversing gear box attaches to an engine front and reverses rotation providing correct rotation for an outdrive and propellor.

The invention relates to an epicyclic reducer for a vehicle hub that includes: a housing; a sun gear arranged in the housing that includes sun teeth and is configured for coupling to an input; a plurality of planet gears, each of which includes planet teeth meshed with some of the sun teeth; a planet carrier that couples the planet gears to each other and is configured as an output; and a ring gear that includes ring teeth meshed with some of the planet teeth of each of the planet gears. The ring gear can be moved within the housing between a reduction position in which the planet gears are configured to rotate relative to the ring gear, and a direct drive position in which the ring gear is constrained to rotate with the planet gears.

A transmission comprising at least one rim 1 and at least one wheel 2. An outside surface of the wheel 2 is adapted to engage with an inside surface of the rim 1. The wheel 2 is rotatable about a first axis B and the rim 2 is rotatable about a second axis A. The second axis A is at a distance from the first axis B. The inside surface of the rim 1 has a cyclic polygonal shape with an angle between each adjoining side 4 of the polygon being greater than 90?. The outer surface of the wheel 2 has a cyclic polygonal shape with an angle between each adjoining side 6 of the polygon being greater than 90?. Each side 6 of the wheel 2 engaging with a side 4 of the rim 1 of equal length during rotation of said transmission.

A gear-lever mechanism using meshing and pushing for rotation includes a shell; an input device including a driving gear; an output device including a supporting frame and a driven gear set; and a positioning device including a fixed bearing gear. The driven gear set includes a transfer-layer gear and at least one idler gear. The supporting shaft center of each transmission gear in the driven gear set is the sub-bearing point, with each transmission gear meshed with its adjacent drive gears to form two meshing points. The bearing point and the two meshing points form a triangular pushing area. At least two triangular pushing areas in head-to-tail connection form a meshing-pushing-lever-type torsion-output path curved from the driving gear to the fixed bearing gear for connecting and driving, to cause the gear set to rotate with a raising speed, and then reduce the speed and increase the torque.