rubber elastic sliding block body 20 essentially fills the entire space between the carrier part 15 and the sliding cap 26 the wings 18 can have an essentially constant thickness over their entire length according to either embodiment and can taper in a radially outward direction accordingly the peripheral wall 21 of the sliding block body 20 in the area of the wings 18 has an essentially constant thickness fig7 to 9 or this thickness increases in the direction toward the wing ends which lie away from the hub 17 fig1 to 6 in both cases the explained arrangement provides for the sliding cap 26 to be able to move to a limited degree using the elastic properties of the sliding block body 20 with reference to the carrier part 15 both in the transverse direction of the sliding block 11 and also in the direction of rotation around the axis 16 of the carrier pin 13 moreover the sliding block 11 can be compressed to a limited degree as a whole in the transverse direction if the sliding cap 26 has limited elasticity conversely the sliding cap 26 and the carrier part 15 engage one another in the lengthwise direction of the sliding block 11 essentially.