ES1060484U - Bifuncional hitch for trailer trailers (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Two-way hitch for towing trailers, of the type intended to be fixed to the rear area of the towing vehicle, which has the purpose of allowing the towing of trailers with a ring or ball coupling system to be indistinctly, and being of the which are constituted by the functional combination of a forked support and a bolt for hooking the eyebolt, it is characterized in that in said support a base plate with side holes is established for its attachment to the tractor vehicle, from which the said fork emerges, with internally divergent lateral branches, provided with coaxial and vertical holes for passage of the bolt, in one of which is also established a drier hole with the previous and smaller diameter intended for the implementation of a key complementary to an existing keyway in the same bolt, which is topped by its upper extremity, specifically above said support, in a ball or sphere suitable for a ball-type coupling. (Machine-translation by Google Translate, not legally binding)

Description

Bifunctional hitch for dragging trailers

Object of the invention

The present invention relates to a hitch intended to be coupled to the rear of a vehicle, to Towing a trailer.

The object of the invention is to achieve a bifunctional hitch, which is valid interchangeably for trailers with ring type coupling or ball joint, and offering at the same time, optimal security guarantees in the blockade.

Background of the invention

As is known, in the field of trailers there are two coupling systems to the tractor vehicle, one type ring, and other type ball joint, so that depending on the characteristics of the trailer so should be the type of hitch that Enter the tractor vehicle.

This has as a practical consequence that a tractor vehicle cannot drag more than those trailers that correspond to a certain coupling system, either the ring system or the ball joint system, and on the other hand it also implies that the change of system in the tractor vehicle or in the trailer, bring with it the need to change the mechanism in The complementary device.

Description of the invention

The bifunctional hitch that the invention proposes solves the problem fully satisfactorily previously exposed, since the same hook is usable interchangeably with trailers whose coupling is ring type or kneecap type

To do this and more specifically said hook it is constituted, as is conventional, by combining a support and a bolt, support that has a motherboard for screw fixing to the tractor vehicle, from which it emerges a kind of fork of divergent lateral branches, affected by coaxial holes for passage of said bolt, with the particularity that one of these holes intersects with another of smaller diameter intended for the implementation of a key that, as security element, locks the bolt when coupled to a keyway from the last batch. In addition, the lower end of the bolt has a diametral hole in which a pin attached to the support by means of a chain to prevent its loss, so that this double pin fixation maximizes the stability of the same on the complementary support.

Logically, this bolt is intended for coupling to the support the eye of the trailer, if it exists, and according to another feature of the invention said pin is topped by its upper extremity in a ball or sphere, intended to serve as a coupling pin for the range of trailers whose coupling device is of the patella type.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings where with illustrative and non-limiting nature, what has been represented next:

Figure 1.- Shows a side elevation view of the support that participates in the bifunctional drag hitch of trailers, which is the subject of this invention.

Figure 2.- Shows a plan view of the same support.

Figure 3.- Shows a side elevation view of the complementary pin of the support of the previous figures.

Figure 4.- Shows a side elevation view. and in section of the support and the bolt properly inter-coupled.

Figure 5.- Shows a detail in section cross section of the assembly represented in the previous figure, to pin fixing pin level.

Preferred Embodiment of the Invention

In view of the figures outlined you can be observed as in the hitch that the invention proposes participate two fundamental pieces, the support (1) represented in the Figures 1 and 2 and the pin (2) shown in Figure 3.

The support (1), intended to be fixed to the vehicle tractor, has a base plate (3) equipped with a pair of side holes (4) for screw fixing, plate base from which a kind of fork (5) of branches emerges (5-5 ') internally divergent and determinants of accommodation with a substantially isoscelic trapezoidal profile, said branches (5-5 ') being provided with two coaxial and vertical holes (6) for bolt passage (2), and resulting in the hole (6) of one of said branches (5) drying with a hole (7) of smaller dimensions and perpendicular to the previous one, intended to receive a key (8) which, by coupling to a keyway (9) of the bolt (2), axially immobilizes the latter.

The key (8) has a perimeter recess curved-concave (10) that allows the release of bolt (2) without the need to fully extract said key (8) from your accommodation (7), and also has a head (11) that facilitates the drive of it. The transverse arrangement of the key (8) and a perfect adjustment of it in its housing (7), prevent accidental exit of it.

However and for greater security, it has provided that the bolt (2) incorporates in its lower extremity a hole (12) for coupling another pin, with its corresponding chain, which collaborates with the key (8) in the axial pin immobilization (2).

It only remains to point out finally that said bolt (2), provided with a perimeter flange (13) in stop functions penetration limiter on the support (1), it is finished off it in a spherical head or ball (14) that allows the coupling of any trailer with a ball-type coupling, that is to say while such a trailer is attachable to the ball (14) a trailer with a ring hitch is attachable to the bolt (2) between the two branches of the support (1), that is to say within its fork (5-5 '), on the same hitch.

Claims (3)

1. Bifunctional trailer tow hitch, of the type intended to be fixed to the rear area of the towing vehicle, whose purpose is to allow the hitching of trailers with a ring or ball joint coupling system, and being of the type of which are constituted by the functional combination of an bracketed support and a bolt for hooking the eyelet, it is characterized in that in said support a base plate with lateral holes is established for its attachment to the tractor vehicle, from which the said fork emerges, with internally divergent lateral branches, provided with coaxial and vertical holes for bolt passage, in one of which a secant hole with the previous one and of smaller diameter is also established for the implantation of a complementary key of a keyway existing in the same bolt, which is topped by its upper extremity, specifically above said support, in a ball or sphere suitable for a ball-type coupling. 2. Bifunctional trailer tow hitch, according to claim one, characterized in that said key fits tightly into the corresponding hole of the fork, has one of its ends with a drive head, and near its opposite end incorporates a recess curved-concave perimeter, so that when said recess is facing the bolt it is free to engage and disengage from the fork, while when it is offset with respect to said bolt it is locked through its keyway. 3. Bifunctional trailer tow hitch, according to previous claims, characterized in that the bolt also incorporates in its lower end a diametral hole for a pin that enhances the safety of the hitch and is related to the support through a chain.