A clamping body freewheel (1) has clamping bodies (2) arranged between a cylindrical outer raceway (4) and a cylindrical inner raceway (3) which is concentric with respect to said cylindrical outer raceway (4), which clamping bodies (2) can be tilted between a freewheel position and a clamping position, and has a cage (6) which guides the clamping bodies (2). The clamping bodies (2) are shaped and guided in the cage (6) in such a manner that they are raised both from the inner raceway (3) and from the outer raceway (4) into the freewheel position when a minimum rotational speed of the cage (6) is exceeded.
Description
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows a clamping body freewheel with clamping bodies in different positions,
FIG. 2 shows the clamping body freewheel from FIG. 1 in the freewheel position, and
FIG. 3 shows the clamping body freewheel from FIG. 1 in the clamping position.
Claims
1. Clamping body freewheel, having clamping bodies (2) arranged between a cylindrical outer raceway (4) and a cylindrical inner raceway (3) which is concentric with respect to said cylindrical outer raceway (4), which clamping bodies (2) can be tilted between a freewheel position and a clamping position, and having a cage (6) which guides the clamping bodies (2), characterized in that the clamping bodies (2) are shaped and guided in the cage (6) in such a manner that they are raised both from the inner raceway (3) and from the outer raceway (4) into the freewheel position when a minimum rotational speed of the cage (6) is exceeded.
2. Clamping body freewheel according to claim 1, characterized in that each clamping body (2) is spring-mounted on the cage (6) by means of a separate spring (13).
3. Clamping body freewheel according to claim 2, characterized in that the spring (13) is embodied as a coil spring.
4. Clamping body freewheel according to claim 3, characterized in that the spring (13) extends substantially in the radial direction relative to the cylindrical raceways (3, 4).
5. Clamping body freewheel according to one of claims 1 to 4, characterized in that the cage (6) has curved guide tracks (8), said curved guide tracks (8) delimiting pockets (7) which hold the clamping bodies (2) and permitting pivoting movements of the clamping bodies (2).
6. Clamping body freewheel according to one of claims 1 to 5, characterized in that each clamping body (2) is pivotable exclusively about one centre of rotation (D) which is positionally fixed relative to the cage (6).
7. Clamping body freewheel according to claim 6, characterized in that, when a clamping body (2) is in the clamping position, its centre of gravity (SP) is spaced apart from the inner raceway (3) to a lesser extent than the centre of rotation (D).
8. Clamping body freewheel according to one of claims 1 to 7, characterized in that the clamping body (2) has two curved peripheral sections (9, 10) which interact respectively with the inner raceway (3) and with the outer raceway (4) and are connected to one another by two intermediate sections (11, 12).
9. Clamping body freewheel according to claim 8, characterized in that at least one of the curved peripheral sections (9, 10) has the shape of a logarithmic spiral.
10. Clamping body freewheel according to claim 8 or 9, characterized in that at least one of the intermediate sections (11, 12) is not curved.
11. Clamping body freewheel according to one of claims 8 to 10, characterized in that a spring (13) which acts on the clamping bodies (2) with a force in the direction of the clamping position is braced between the cage (6) and one of the intermediate sections (11, 12) of the clamping body (2).
12. Clamping body freewheel according to one of claims 1 to 11, characterized in that a rolling body (14) is arranged between the raceways (3, 4) between successive clamping bodies (2) in the peripheral direction.
13. Clamping body freewheel according to claim 12, characterized in that the rolling bodies (14) are guided in the same cage (6) which is also provided for guiding the clamping bodies (2).
Patent Application
20070175722
