Abstract: An anti-skid device for installation on a belt of a crawler vehicle or wheel of a wheel drive includes a base body which, along a direction which corresponds to the running direction of the crawler belt or wheel, has at least two bottom sections (which, in the installed state, rest on a running surface of the belt or wheel, and has at least one rib section which is curved upward and is arranged between two bottom parts. One or more fastening points are provided in the bottom sections for anchoring the anti-skid device to the belt. The rib section is supported on the bottom sections and is divided into two or more rib parts in the direction transverse to the running direction; in addition, recesses are provided in lateral flanks of the rib section. One or more traction elements that project away can be provided on the rib parts.

Abstract: In a tension device for a nonskid chain, a winding reel is supported, so that it can rotate about its axis inside the housing and is prestressed in the winding direction and has a gear rim with teeth arranged along its circumference. A tension line that can be retracted into the housing can be connected to the winding reel, such that a ratchet in a first position blocks a rotational movement of the winding reel in the tension direction by engagement of the ratchet in the teeth. Areas free of teeth on the circumference of the gear rim of the winding reel alternate with areas with teeth.

Abstract: In a tension device for a nonskid chain, a winding reel is supported, so that it can rotate about its axis inside the housing and is prestressed in the winding direction and has a gear rim with teeth arranged along its circumference. A tension line that can be retracted into the housing can be connected to the winding reel, such that a ratchet in a first position (A) blocks a rotational movement of the winding reel in the tension direction by engagement of the ratchet in the teeth. Areas free of teeth on the circumference of the gear rim of the winding reel alternate with areas with teeth.