A track system for a vehicle having at least three axles is disclosed. The track system includes a frame to which sprocket, idler and support wheel assemblies are connectable, an endless track and a pivoting assembly. The pivoting assembly has a casing connectable to a second axle and at least one pivotable member that has first and second portions respectively pivotally connected to the casing and to the frame. The at least one pivotable member is pivotable between first and second positions about a longitudinally extending pivot, in response to which the first portion is displaced laterally relative to the second portion, and pivotable between third and fourth positions about a lateral pivot axis in response to which the first portion is displaced longitudinally relative to the second portion. A pivoting assembly, a pivoting assembly including a resilient assembly, and a vehicle having the track system are also disclosed.

A track system for a vehicle having at least three axles is disclosed. The track system includes a frame to which sprocket, idler and support wheel assemblies are connectable, an endless track and a pivoting assembly. The pivoting assembly has a casing connectable to a second axle and at least one pivotable member that has first and second portions respectively pivotally connected to the casing and to the frame. The at least one pivotable member is pivotable between first and second positions about a longitudinally extending pivot, in response to which the first portion is displaced laterally relative to the second portion, and pivotable between third and fourth positions about a lateral pivot axis in response to which the first portion is displaced longitudinally relative to the second portion. A pivoting assembly, a pivoting assembly including a resilient assembly, and a vehicle having the track system are also disclosed.

An information acquisition apparatus for acquiring information relating to a crawler configured to be wound around a rotationally driven sprocket connected to a rotation axle provided in a vehicle, the crawler having a meshing part configured to mesh with a tooth or a tooth base of the sprocket and being circulatorily driven in conjunction with rotation of the sprocket is provided. The information acquisition apparatus includes a memory and a processor. The memory stores, as initial information, the number of meshing parts of the crawler and information specifying the meshing part that is at a predetermined position, prior to the vehicle traveling. The processor acquires rotation information of the sprocket. The processor, while the vehicle is traveling, information specifying the meshing part that is at the predetermined position, based on the initial information and the rotation information.

An information acquisition apparatus for acquiring information relating to a crawler configured to be wound around a rotationally driven sprocket connected to a rotation axle provided in a vehicle, the crawler having a meshing part configured to mesh with a tooth or a tooth base of the sprocket and being circulatorily driven in conjunction with rotation of the sprocket is provided. The information acquisition apparatus includes a memory and a processor. The memory stores, as initial information, the number of meshing parts of the crawler and information specifying the meshing part that is at a predetermined position, prior to the vehicle traveling. The processor acquires rotation information of the sprocket. The processor, while the vehicle is traveling, information specifying the meshing part that is at the predetermined position, based on the initial information and the rotation information.

A robotic pool cleaner includes a cleaning body, a drive and a cleaning roller brush mechanism. The robotic pool cleaner filters liquid and/or contaminants in a pool through the cleaning body. The drive mechanism is connected to the cleaning body, which is driven to move in the pool in a working process of the robotic pool cleaner. The drive mechanism includes a drive wheel with a first outer ring gear. The cleaning roller brush mechanism is coupled with the first outer ring gear through a transmission belt, so that the cleaning roller brush mechanism is driven by the first outer ring gear to rotate relative to the cleaning body when the drive motor drives the first outer ring gear to rotate. The robotic pool cleaner improves cleaning efficiency and reduces wear of a cleaning roller brush, thereby prolonging the service life of the cleaning roller brush mechanism.

A robotic pool cleaner includes a cleaning body, a drive and a cleaning roller brush mechanism. The robotic pool cleaner filters liquid and/or contaminants in a pool through the cleaning body. The drive mechanism is connected to the cleaning body, which is driven to move in the pool in a working process of the robotic pool cleaner. The drive mechanism includes a drive wheel with a first outer ring gear. The cleaning roller brush mechanism is coupled with the first outer ring gear through a transmission belt, so that the cleaning roller brush mechanism is driven by the first outer ring gear to rotate relative to the cleaning body when the drive motor drives the first outer ring gear to rotate. The robotic pool cleaner improves cleaning efficiency and reduces wear of a cleaning roller brush, thereby prolonging the service life of the cleaning roller brush mechanism.

A track assembly for a vehicle is provided. The vehicle has a suspension arm for connecting the track assembly to the vehicle. The track assembly includes a frame, a plurality of track-contacting wheels, and an endless track disposed around the track-contacting wheels. The track-contacting wheels include: a drive wheel rotationally connected to the frame and at least one idler wheel rotationally connected to the frame. The drive wheel defines a drive wheel axis about which the drive wheel is rotatable. The drive wheel is adapted for driving the endless track. The track assembly also includes a rotation limiting device for limiting rotation of the track assembly relative to the suspension arm of the vehicle. The rotation limiting device is connected to the frame of the track assembly and is configured to be connected to the suspension arm of the vehicle.

A track assembly for a vehicle is provided. The vehicle has a suspension arm for connecting the track assembly to the vehicle. The track assembly includes a frame, a plurality of track-contacting wheels, and an endless track disposed around the track-contacting wheels. The track-contacting wheels include: a drive wheel rotationally connected to the frame and at least one idler wheel rotationally connected to the frame. The drive wheel defines a drive wheel axis about which the drive wheel is rotatable. The drive wheel is adapted for driving the endless track. The track assembly also includes a rotation limiting device for limiting rotation of the track assembly relative to the suspension arm of the vehicle. The rotation limiting device is connected to the frame of the track assembly and is configured to be connected to the suspension arm of the vehicle.

There is provided a planar member having a flat portion that makes contact with the inner circumferential surface of an endless track at a position at a traveling subject side with respect to a virtual straight line that connects a vertex, at the traveling subject side, in the outer circumferential surface of a first pulley and a vertex, at the traveling subject side, in the outer circumferential surface of a second pulley.

Provided are an elastic crawler and a crawler-type travel device in which wheel detachment and edge cut are unlikely to occur even when performing operations inside a large cylindrical structure or on a ground surface that is highly curved. An elastic crawler (1) has a crawler body (2) comprising an endless elastic body depressed by roller wheels having left and right tread surfaces, a plurality of lugs (4) being disposed on the ground-contact surface (7) of the crawler body (2). On one side portion in relation to the center position in the crawler width direction on the ground-contact surface side of the crawler body (2), outward of a tread surface (11c) which is the inner side of the roller wheels in the crawler width direction, toward the vicinity of one side end edge in the crawler width direction from a position within a range inward of a tread surface (11a) which is the outer side, a distance (dp) in the height direction of the tread surface (11a) which is the outer side is gradually reduced, whereby an inclined surface (7a) is formed such that the crawler thickness is gradually reduced, and due to this configuration, the inclined surface does not contact the ground when travelling on a flat surface.