Tensioning device for a control gear
AssigneeIna Walzlager Schaeffler oHG
InventorsThomas Ullein, Bolko Schuseil
Life of this patent
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Abstract
A tensioning device for the chain (3) of an internal combustion engine, for example of a control gear, comprises a guide rail (8), a pivoted tension lever (15) and a tension element (13) which exerts a tensioning force on the sliding block (18) through a compression spring (14). According to the invention, two sliding blocks (17, 18) acting in different directions on the chain (3) are arranged on the tension lever (15) which has a fixed axis of pivot (16). The device of the invention can thus be used in a very small mounting space and is able to compensate large chain elongations.
Claims18
A tensioning device for a chain (3) or a toothed belt of a camshaft drive of an internal combustion engine comprising a guide rail (8,24) situated in the vicinity of a tensioned portion (9) of the chain (3) or the toothed belt for guiding the chain (3) or the toothed belt in the tensioned portion thereof, a pivoted tension lever (15,23) for transmitting a pre-tension by acting on the slack portion of the chain (3) or the toothed belt and a tension element (13) which exerts a tensioning force on the tension lever (15, 23) through a compression spring (14), wherein two sliding blocks (17, 18) acting in different directions opposite sides of the chain on the chain (3) or the toothed belt on the slack portion (19) thereof are arranged on the tension lever (15,23) which has a fixed axis of pivot (16,26) located along the tension lever (15,23).
A tensioning device for either one of a chain (3) and a toothed belt of a camshaft drive of an internal combustion engine, comprising:
- a guide rail (8, 24) positioned along and abutting a tensioned portion of either one of the chain and the toothed belt;
- a tension lever (15, 23) having a fixed axis of pivot and transmitting a tensioning force;
- a tension element (13) attached to the guide rail and engaging said tension lever, said tension element exerting the tensioning force on the tension lever (15, 23);
- and
- two sliding blocks (17, 18) attached along the tension lever and abutting different sides of either one of the chain (3) and the toothed belt along a slack portion.
Dependencies are inferred from the claim text.