Land vehicles – Wheeled – Articulated vehicle
Patent
1984-11-16
1986-09-23
Love, John L.
Land vehicles
Wheeled
Articulated vehicle
2482242, B60D 106
Patent
active
046131485
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a detachable towing bracket for a vehicle, in particular for an automobile, in which the towing hook with a first coupling member can be slid vertically upwards and thus become detached from a second coupling member with fittings to be attached to the vehicle, and in which the first coupling member, when slid vertically downwards, is arrested in place by facilities provided on the second coupling member, whilst the coupling members have been designed as trapezoid plates and can be linked together by means of a dovetail joint.
Such a towing bracket is known from the French patent specification No. 7611632 which describes a number of embodiments for the coupling members. They relate in the main to prismatic vertical and horizontal dovetail joints. In the vertical dovetail joints, a vertical arrestment is effected by means of a lamellar closure of the groove or a groove diminishing in cross-section going down.
A disadvantage of the known embodiment is that in the direction of travel clearance occurs in the coupling with downturned grooves, through the rectangular cross-section, in consequence of which the coupling members may shift in the said direction, resulting in wear of the coupling. It is an object of the present invention to ameliorate this situation. To this end, such a towing bracket has been designed so that the raised edges of the second trapezoid coupling member approximately taper over its entire cross-section, whilst the dovetailed groove-forming edges of the first coupling member taper correspondingly in cross-section.
In a further elaboration of the invention, provision is made for a locking pin which is forced under spring tension into locked position, which is provided with a tapering end, which runs substantially crosswise of the flat coupling plate and which is fitted on the first coupling member, in such a fashion that with the towing bracket in coupled position the locking pin runs eccentrically relative to a bore in the second coupling member for receiving the locking pin. This arrangement has the advantage that the locking pin fits snugly at all times within the bore through the second coupling member.
Further particulars of the invention will emerge from the following 5 descriptions of a few embodiments given by way of example with reference to the accompanying drawings, in which
FIG. 1 is a lateral view of an embodiment of the detachable towing bracket, with the first and the second coupling member;
FIG. 2 is a view of the first coupling member in the direction of the line II--II in FIG. 1;
FIG. 3 is a lateral view of the second coupling member mounted on the vehicle;
FIG. 4 is a view of the second coupling member in the direction of line IV--IV in FIG. 3;
FIG. 5 is a cross-sectional view in the direction of line V--V in FIG. 2;
FIG. 6 is a lateral view of an alternative embodiment of the detachable towing bracket with the first and the second coupling member;
FIG. 7 is a view in the direction of line VII--VII in FIG. 6.
The detachable towing bracket according to FIG. 1 substantially comprises the first coupling member 1 with the coupling bar on coupling ball 2 and the second coupling member 3 (dashed line).
FIG. 2 depicts the first coupling member 1 with the coupling bar or ball 2 in front elevation viewed in the direction of line II--II. Also represented is the bore 4 for the locking pin.
FIG. 3 presents a lateral view of the second coupling member 3, and FIG. 4 a front view of the same coupling member 3 in the direction of line IV--IV, including the bore 5 for receiving the locking pin.
FIG. 5 is a cross-sectional representation of the dovetailed groove-forming edge 6 of the first coupling member 1. The dovetailed groove-forming edge 6 clasps the corresponding tapering edge 7 of the second coupling element 3.
FIG. 6 presents a lateral view of an alternative embodiment of the detachable towing bracket with the first coupling member 8 and the second coupling member 9 (dashed line). It also depicts in lateral view the locking pin 10 in locked position togethe
REFERENCES:
patent: 1252207 (1918-01-01), Walker
Love John L.
McGiehan Donn
Tobo Made B.V.
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