A sprocket (10) is capable of engaging with engaging portions (22) on an elastic endless belt (21). On a tooth face (F) of a tooth (12) of the sprocket (10), a portion of a tooth base on at least one side of a center line (O.sub.1) of the tooth (12) is a tooth base surface (12b), and the tooth base surface (12b) is inclined relative to the center line (O.sub.1) of the tooth (12) at an angle (A.sub.1) in a range of 0° or greater to 7.5° or less so as to approach the center line (O.sub.1) of the tooth (12) towards a tooth tip surface (12d).

A drive track for a tracked vehicle has an endless belt having an inner surface and an outer surface. The belt defines a longitudinal direction and a lateral direction. A plurality of external lugs project outwards from the outer surface of the belt. Each of the plurality of external lugs has a height in a direction normal to the outer surface. The plurality of external lugs forms a plurality of lateral rows. A longitudinal spacing between consecutive lateral rows of the plurality of lateral row is an external lug pitch. The height of at least some of the plurality of external lugs is greater than the external lug pitch. Drive sprocket and drive track assemblies and vehicles having the drive track are also presented.

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.

This disclosure is to provide an elastic crawler drive mechanism including an elastic crawler (20) with engaging portions (22) disposed on an endless belt (21), and a sprocket (10) having teeth (12), wherein: engaging surfaces (F2) of the engaging portions (22) have flat engaging planes (22b) in contact with a part of tooth surfaces (F1) of the sprocket (10) when in contact with tooth bottom surfaces (11a) of the sprocket (10), and when the engaging portions (22) are in contact with the tooth bottom surfaces (11a), and simultaneously the engaging planes (22b) are in contact with the tooth surfaces (F1) of the sprocket (10), at least one of the tooth surfaces (F1) of the sprocket (10) and the engaging planes (22b) of the engaging portions (22) form gaps (C) between the tooth surfaces (F1) and the engaging planes (22b), on sides closer to the tooth bottom surfaces (11a) than contact portions (P) of the tooth surfaces (F1) and the engaging planes (22b).

A track work vehicle includes a track system. The track system includes a drive wheel supported by an axle housing that drives a continuous ground-engaging track, a saddle assembly that guides the track about the drive wheel and an undercarriage frame that supports one or more idler wheels that guide the track along a ground surface. The track work vehicle includes a fender assembly that includes at least one fender coupled to the track system to overlap a portion of the track.

A track includes a body formed of an elastomeric material having a series of longitudinally spaced guide-drive lugs, as well as a base and an outer surface disposed upon the upper face of each of the guide-drive lugs. At least one multilayer reinforcement is disposed within each of the guide-drive lugs at a distance inward from the outer surface, where the multilayer reinforcement is a contiguous roll providing a plurality of 360-degree turns of reinforcement material, and the roll has an axial cross-sectional shape selected from one of circular, rectangular, square, ovate and trapezoidal.

A vehicle with a track system including a track for traction of the vehicle on a ground can be monitored (e.g., during operation of the vehicle) to obtain information regarding the vehicle, including information regarding the track system, such as a temperature and/or another characteristic of a wheel of the track system sensed by a sensor of that wheel and/or a temperature and/or another characteristic of the track sensed by a sensor of the track, which can be used to inform a user (e.g., an operator of the vehicle), assessing wear, vibration, and/or other aspects of the track system, evaluating use (e.g., a duty cycle), performance, and/or other aspects of the vehicle, and/or control the vehicle (e.g., a speed of the vehicle), for properly aligning the track and/or other purposes. This may be useful, for example, to help prevent rapid wear or other deterioration of the track and/or for various other reasons.

The present invention relates to a running gear chain (2), in particular a bogie chain (2), having a flexible body (20), preferably an elastomer body (20), which is closed in endless fashion, or closable in endless fashion, in a running direction (A). The running gear chain (2) according to the invention is characterized by a multiplicity of rigid transverse elements (24) which are connected to the outer side of the flexible body (20) and extend substantially transversely with respect to the running direction (A), wherein at least some of the rigid transverse elements (24), preferably all of the rigid transverse elements (24), are arranged so close together in the running direction (A) that, with a planar extent of the flexible body (20), two immediately adjacent rigid transverse elements (24) make contact in the running direction (A).

A track system for a vehicle having a rear swing arm that is movable between a compressed suspension position and an extended suspension position. The track system has a frame and a dynamic traction device. The frame is pivotably attachable to the swing arm. The dynamic traction device has at least two elongate portions, one of which is movable relative to the other between a retracted position and an extended position and biased toward the retracted position. In use, the elongate portions interconnect the vehicle and the frame. When the vehicle is lifted off terrain, during at least a part of a movement of the swing arm from the compressed suspension position toward the extended suspension position, the dynamic traction device applies a torque to the frame and thereby changes a longitudinal angular position of the frame counter-clockwise relative to a left side of the vehicle.

A device is described that includes a sensor portion and a chassis portion. The sensor portion includes a plurality of sensing devices. The chassis portion is connected to the sensor portion and includes a first track and a second track. The second track is positioned adjacent the first track. The first and second tracks cooperate to substantially cover an entire width of the chassis portion.