PURPOSE: To prevent a steering link mechanism and apparatuses below a car body from being damaged by regulating the rotational angle of a pitman arm and the oscillating angle of a front axle housing.

CONSTITUTION: On the left and right outer sides of a pitman arm, left and right regulating bodies 11 are fixed by a bolt 12 on the lower side of an axle bracket 1 to regulate the excessive rotation of the pitman arm 4 by stoppers 11a provided on the left and right inner sides of the regulating bodies 11 and the excessive oscillation of a front axle housing 9 by stoppers 11b provided on the lower sides of regulating bodies 11. The front axle housing 9 is provided to vertically oscillated in its left and right parts against the axle bracket 1 round a center pivot 10.