Torsionally flexible coupling, a mold, and a method of producing same
View Patent ↗A torsionally flexible coupling has a hub ring and a vibrationally isolated pulley surrounding the hub ring at a radial distance, a spring body made of a rubber-elastic material being situated in the gap formed by the distance, and comprises a sliding-contact bearing for mutual support of the hub ring and the pulley, the sliding-contact bearing having a sliding-contact surface on the side facing the hub ring or the pulley, the sliding-contact surface having at least one elastically flexible projection in the radial direction which comes in contact with the surface of the hub ring or the pulley under elastic prestress.
1. A torsionally flexible coupling comprising
a hub ring;
a vibrationally isolated pulley surrounding the hub ring at a radial distance;
a spring body made of a rubber-elastic material being situated in a gap formed by the distance; and
a sliding-contact bearing for mutual support of the hub ring and the pulley, the sliding-contact bearing having a sliding-contact surface and at least one cam on a side facing the hub ring or the pulley, the sliding-contact surface having at least one elastically flexible projection in the radial direction, the at least one projection contacting a surface of the hub ring or the pulley under elastic prestress, the cam being designed as an anti-twist element in a rotationally fixed engagement with an elastic receptacle, the elastic receptacle being situated between the pulley and the sliding contact bearing in the radial direction or between the hub ring and the sliding contact bearing.
2. The coupling as recited in claim 1 , wherein the sliding-contact bearing is designed in one piece and of a uniform material.
3. The coupling as recited in claim 1 , wherein the sliding-contact bearing is made of a thermoplastic polymer material.
4. The coupling as recited in claim 1 , wherein the at least one projection includes at least three projections distributed uniformly in a circumferential direction of the sliding-contact bearing.
5. The coupling as recited in claim 1 , wherein the sliding-contact bearing has at least one cam on the side facing the pulley or the hub ring, and the cam is designed as an anti-twist element.
6. The coupling as recited in claim 5 wherein the cam is in a rotationally fixed engagement with an elastic receptacle, and the elastic receptacle is situated between the pulley and the sliding-contact bearing in the radial direction or between the hub ring and the sliding-contact bearing.
7. The coupling as recited in claim 6 wherein the pulley, the receptacle, and the sliding-contact bearing, or the hub ring, the receptacle, and the sliding-contact bearing together form a prefabricatable unit.
8. The coupling as recited in claim 6 wherein the receptacle is designed as a rubber strip which is joined to the sliding-contact bearing in a friction-locked and/or form-fitting rotationally fixed manner.
9. The coupling as recited in claim 1 , wherein the hub ring, in longitudinal section, has a U-shape with a first axial projection radially inside being surrounded by an inside circumference of the spring body and a second axial projection radially outside being surrounded by the sliding-contact bearing.
10. The torsionally flexible coupling as recited in claim 1 , wherein the spring body connects the hub ring to the pulley in a torsionally flexible manner.
11. The coupling as recited in claim 1 wherein the pulley, the receptacle, and the sliding-contact bearing, or the hub ring, the receptacle, and the sliding-contact bearing together form a prefabricatable unit.
12. The coupling as recited in claim 1 wherein the receptacle is designed as a rubber strip which is joined to the sliding-contact bearing in a friction-locked and/or form-fitting rotationally fixed manner.