ES357596A1 - An automatic parking and safety brake system for vehicles tow. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

An automatic parking brake and safety device for towing vehicles, characterized by incorporating a support arranged to be attached to the braked wheels and carrying a reinforcement of horizontal direction and three vertical planes: the fixed base on the support itself, and two parallel branches, the extremities of which in turn take an axis between them; a tensioning rod which is engageable with the braking system proposed by the projecting end thereof and moves between the parallel branches of the aforementioned armor, as well as through the bottom thereof and by the alternative action of a roller adjusted in the front forked end of the tensioning rod itself so that it can be driven in turn, and a spiral spring that surrounds the rod itself working in compression between said roller and the bottom of the support frame with the purpose of promoting, taking as a support point the support, a constant pressure of the roller on a cam and creating a reserve of pressure for the braking as soon as the position of the alluded cam is modified; and the cam itself, which, apart from presenting the required profile with a hook-shaped recess in the upper part, is attached to the rear end of the vehicle's lance so that they form, together an articulated assembly on the shaft of the armature of the support and intended to remain inactive in the normal working position of the trailer to constitute when the latching lance is released and is optionally raised to exceed the vertical, the thrust lever of said roller of the forked end of the tension rod and, with it, of the spiral spring that surrounds it, whose reaction force then pulls the tensioning rod itself in a length equivalent to the depth of fall of the cam and automatically brings the brake system coupled to its active parking position and, likewise, at the entrance of the repeated roller in the housing of the hook or ratchet of the cam, which solidly assures it from behind in pre vision of an untimely release. (Machine-translation by Google Translate, not legally binding)