Interchangeable track systems for interchangeable deployment with vehicle wheels on a forestry harvester vehicle having a front axle and a rear axle may include a pair of front roller frame mount arms and a pair of rear roller frame mount arms configured for mounting on the front axle and the rear axle, respectively. A pair of front track assemblies and a pair of rear track assemblies may be configured for removable mounting on the pair of front roller frame mount arms and the pair of rear roller frame mount arms, respectively. Each of the pair of front track assemblies and the pair of rear track assemblies may include an elongated roller frame configured for pivotal attachment to the corresponding one of the pair of front roller frame mount arms and pair of rear roller frame mount arms. A front idler roller and a rear idler roller may be carried by the roller frame. A track may be trained on the front idler roller and the rear idler roller. A sprocket may be configured for driving engagement by a corresponding one of the front axle and the rear axle, with the sprocket drivingly engaging the track.

Interchangeable track systems for interchangeable deployment with vehicle wheels on a forestry harvester vehicle having a front axle and a rear axle may include a pair of front roller frame mount arms and a pair of rear roller frame mount arms configured for mounting on the front axle and the rear axle, respectively. A pair of front track assemblies and a pair of rear track assemblies may be configured for removable mounting on the pair of front roller frame mount arms and the pair of rear roller frame mount arms, respectively. Each of the pair of front track assemblies and the pair of rear track assemblies may include an elongated roller frame configured for pivotal attachment to the corresponding one of the pair of front roller frame mount arms and pair of rear roller frame mount arms. A front idler roller and a rear idler roller may be carried by the roller frame. A track may be trained on the front idler roller and the rear idler roller. A sprocket may be configured for driving engagement by a corresponding one of the front axle and the rear axle, with the sprocket drivingly engaging the track.

Transmission systems, disconnect mechanisms, and methods of assembling disconnect mechanisms are envisioned. A disconnect mechanism is adapted to selectively decouple a driving device from a driven device. The disconnect mechanism includes a lever, an inner shaft, an outer shaft, and a housing. The inner shaft is coupled to the lever, the outer shaft is coupled to the inner shaft, and the housing at least partially houses the inner shaft and the outer shaft.

A wheel assembly, a track system and a vehicle are disclosed. The track system has a frame defining a longitudinal center plane, a wheel assembly rotationally and pivotably connected to the frame, and the endless track having the inner surface and surrounding the frame and the wheel assembly. The wheel assembly has a non-linear axle and a wheel. The non-linear axle has a first segment and a second segment. The wheel is rotationally connected to the first segment extending along a rotation axis of the wheel. The second segment being pivotably connected to the frame. The second segment is offset from the first segment so that the second segment is closer to an inner surface of an endless track than the first segment.

A wheel assembly, a track system and a vehicle are disclosed. The track system has a frame defining a longitudinal center plane, a wheel assembly rotationally and pivotably connected to the frame, and the endless track having the inner surface and surrounding the frame and the wheel assembly. The wheel assembly has a non-linear axle and a wheel. The non-linear axle has a first segment and a second segment. The wheel is rotationally connected to the first segment extending along a rotation axis of the wheel. The second segment being pivotably connected to the frame. The second segment is offset from the first segment so that the second segment is closer to an inner surface of an endless track than the first segment.

Provided is a speed reducer including: a first reduction unit disposed at an input stage of a multi-stage reduction unit that decelerates a rotational driving force of an electric motor from an input stage side toward an output stage side and transmits the decelerated rotational driving force to a rotational drive unit; a first ring gear meshed with first planetary gears provided in the first reduction unit; and a third reduction unit disposed at an output stage of the multi-stage reduction unit and having a first case. The first ring gear is provided in the first case of the third reduction unit.

A drive system includes a main track frame adapted to be coupled with the associated tracked vehicle, a sprocket carrier, and a gear assembly operable to communicate rotational power from an associated input driving member to the sprocket carrier for driving the sprocket carrier relative to the main track frame. The main track frame includes an inboard support member, and an outboard member. The inboard and outboard support members are spaced apart relative to each other defining a gap therebetween. The sprocket carrier spans the gap and is rotatably carried by the inboard and outboard support members, and is adapted to couple with the associated sprocket of the associated tracked work vehicle. The gear assembly may be a planetary gear system. The planetary gear system may be disposed in the gap between the inboard and outboard support members. The planetary gear system may be disposed in the sprocket carrier.

A drive system includes a main track frame adapted to be coupled with the associated tracked vehicle, a sprocket carrier, and a gear assembly operable to communicate rotational power from an associated input driving member to the sprocket carrier for driving the sprocket carrier relative to the main track frame. The main track frame includes an inboard support member, and an outboard member. The inboard and outboard support members are spaced apart relative to each other defining a gap therebetween. The sprocket carrier spans the gap and is rotatably carried by the inboard and outboard support members, and is adapted to couple with the associated sprocket of the associated tracked work vehicle. The gear assembly may be a planetary gear system. The planetary gear system may be disposed in the gap between the inboard and outboard support members. The planetary gear system may be disposed in the sprocket carrier.

The invention relates to a tracked vehicle comprising a vehicle body and a track assembly pair. Said track assembly pair is arranged to suspendedly support said vehicle body allowing relative movement between said vehicle body and each track assembly (21) of said track assembly pair. Each track assembly (21) comprises a track support beam (22) configured to support a plurality of road wheels (23, 23a), a drive wheel (24), and a motor (110) for operating said drive wheel (24), an endless track (25) being disposed around said road wheels (23, 23a) and drive wheel (24). Said motor (110) is fixedly arranged to said track support beam (22). Said motor (110) is arranged in connection to the drive wheel (24) such that a motor axle essentially coaxially coincides with a centre axis (Z) of the drive wheel (24).

The invention relates to a tracked vehicle comprising a vehicle body and a track assembly pair. Said track assembly pair is arranged to suspendedly support said vehicle body allowing relative movement between said vehicle body and each track assembly (21) of said track assembly pair. Each track assembly (21) comprises a track support beam (22) configured to support a plurality of road wheels (23, 23a), a drive wheel (24), and a motor (110) for operating said drive wheel (24), an endless track (25) being disposed around said road wheels (23, 23a) and drive wheel (24). Said motor (110) is fixedly arranged to said track support beam (22). Said motor (110) is arranged in connection to the drive wheel (24) such that a motor axle essentially coaxially coincides with a centre axis (Z) of the drive wheel (24).