Anti-skid device

Anti-skid device

• with several lengths of chain fixed to a rotary holder,
• portions of the lengths of chain facing away from the holder in an operating position being thrown from the rotating holder under centrifugal action to an area of a ground-contacting surface of a rotating vehicle wheel,
• and with a drive unit with a piston guided in a pneumatic cylinder, by which drive unit, with an interposed transmission element formed by a thrust chain comprising a front link and an end link, an extension arm bearing the holder can be moved from a rest position into an operating position and back, and
• by which drive unit pivoting movements can be applied to a drive wheel or drive pinion connected to the front link, a shaft of said drive wheel or drive pinion being held in a housing that bears the extension arm for the holder,
• characterized in that
• the end link of the thrust chain (22) is directly connected to the piston (16) of the drive unit (6), thus forming a piston rod,
• and that the housing (12) accommodating the drive wheel or drive pinion (29) and a part of the cylinder (11) facing the housing (12) form a common pressure space to which compressed air can be admitted, wherein:
• the housing (12) accommodating the drive pinion (29) and the shaft (31) thereof is provided with guide insets (33, 34) for the thrust chain (22), and
• a further guide is formed by an annular guide web (40) enclosing the tip circle of the teeth of the drive pinion 29 on a part of its circumference with clearance.