A tractive element for a power machine can include a frame, an endless track, a drive sprocket, and a first set of split rollers. The first set of rollers can include a first roller rotatably coupled to the first plate with a first axis of rotation and a second roller rotatably coupled to the second plate with a second axis of rotation. The first axis of rotation and the second axis of rotation can be spaced apart from one another with a first roller offset distance, along a front-to-back direction of the tractive element, that can provide improved ride quality.

A tractive element for a power machine can include a frame, an endless track, a drive sprocket, and a first set of split rollers. The first set of rollers can include a first roller rotatably coupled to the first plate with a first axis of rotation and a second roller rotatably coupled to the second plate with a second axis of rotation. The first axis of rotation and the second axis of rotation can be spaced apart from one another with a first roller offset distance, along a front-to-back direction of the tractive element, that can provide improved ride quality.

Track systems for traction of a vehicle in which a spacing of laterally-adjacent ones of the track systems in a widthwise direction of the vehicle is adjustable. This may facilitate use of the vehicle in different conditions (e.g., in different field configurations, such as in different configurations of row crops, where the vehicle is an agricultural vehicle). For instance, the spacing of the laterally-adjacent ones of the track systems may be adjustable while the laterally-adjacent ones of the track systems are connected to a powertrain of the vehicle and/or without requiring use of additional parts (e.g. spacers).

Track systems for traction of a vehicle in which a spacing of laterally-adjacent ones of the track systems in a widthwise direction of the vehicle is adjustable. This may facilitate use of the vehicle in different conditions (e.g., in different field configurations, such as in different configurations of row crops, where the vehicle is an agricultural vehicle). For instance, the spacing of the laterally-adjacent ones of the track systems may be adjustable while the laterally-adjacent ones of the track systems are connected to a powertrain of the vehicle and/or without requiring use of additional parts (e.g. spacers).

A novel sprocket for a track drive of a mobile robot may allow for some deformation of the track so that the track better conforms to the surface on which the robot travels. The novel sprocket also may prevent excessive track deformation or deflection that may result in undesirable de-tracking.

Drive systems of the present disclosure include a drive member and a stationary counter-toothing arranged along a transport path. The drive member has an endless chain for mutual engagement with the counter-toothing to transmit a driving force, and at least one drive pinion for mutual engagement with the chain and for driving the chain. Guide components are provided at the chain. The drive system may further include a guide element for guiding the guide components of the chain.

Drive systems of the present disclosure include a drive member and a stationary counter-toothing arranged along a transport path. The drive member has an endless chain for mutual engagement with the counter-toothing to transmit a driving force, and at least one drive pinion for mutual engagement with the chain and for driving the chain. Guide components are provided at the chain. The drive system may further include a guide element for guiding the guide components of the chain.

A crawler drive unit relating to one aspect of the present disclosure includes a speed reduction mechanism provided in a running unit for causing a vehicle body to run, where the speed reduction mechanism is configured to transmit a driving force to a crawler provided on the running unit, a transmission mechanism for transmitting the driving force to the speed reduction mechanism, and an electric motor for applying a rotational force to the transmission mechanism. A motor shaft of the electric motor is positioned higher than a rotational axis of an input shaft of the speed reduction mechanism.

A crawler drive unit relating to one aspect of the present disclosure includes a speed reduction mechanism provided in a running unit for causing a vehicle body to run, where the speed reduction mechanism is configured to transmit a driving force to a crawler provided on the running unit, a transmission mechanism for transmitting the driving force to the speed reduction mechanism, and an electric motor for applying a rotational force to the transmission mechanism. A motor shaft of the electric motor is positioned higher than a rotational axis of an input shaft of the speed reduction mechanism.

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.