Single pivot hinge with integral coil spring assist
A vehicle closure hinge includes a mount having a pivot axis flange, a pivot link, a pivot coupling the pivot link to the pivot axis flange and a spring formed by a laterally coiled strand extending from a first coil end to a second coil end in a direction substantially perpendicular to the plane of displacement about the pivot axis. The coil size, the strand size and the number of coils can be varied as desired to vary the spring biasing force exerted against the vehicle closure without varying other components of the hinge. The hinge parts may be designed with various configurations including simple pivoting links or a four bar linkage. A strand end of the coil spring extends along the direction of the coil to a position at a first coil end to maintain biasing force near the plane of displacement about the pivot axis.
1. A vehicle closure hinge comprising:
a mount including a pivot axis flange locating a pivot axis, a first spring support flange and a second spring support flange spaced from said first spring support flange;
a pivot lever coupled to the vehicle closure;
a pivot coupling said pivot lever to said pivot axis flange;
a torsion spring comprising a laterally coiled strand extending from a first coil end to a second coil end along a coil axis spaced from the pivot axis, said coil ends and said coil axis housed intermediate said first and second spring support flanges throughout hinge displacement, said strand having a first strand end extending from said first coil end, and a second strand end extending from said second coil end and coupled to said mount;
wherein said pivot lever is a gooseneck bar;
a link pivotally coupled to and carried by said pivot lever at a point spaced from said pivot coupling said pivot lever to said pivot axis flange;
wherein said first strand end is pivotally coupled to said link; and
wherein said link includes a second pivot coupling said link to said pivot lever thereby defining a four bar linkage controlling the biasing of said pivot lever to open the vehicle closure.
2. The invention as defined in claim 1 wherein said coil axis is parallel to said pivot axis.
3. The invention as defined in claim 1 wherein at least one of said first and second spring support flanges has an opening that receives a support pin.
4. The invention as defined in claim 3 and further comprising a spring bushing having a central opening receiving said pin.
5. The invention as defined in claim 1 wherein said first strand end comprises a hook.
6. The invention as defined in claim 5 wherein said hook engages said link.
7. The invention as defined in claim 6 wherein said link includes spaced pivot flanges.
8. The invention as defined in claim 7 wherein said pivot flanges and said pivot lever receive a pivot pin.
9. The invention as defined in claim 1 wherein said torsion spring's biasing pulls said link.