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US 2026/0243309 A1Published application
Shaft-hub connection arrangement between a metallic shaft and a hub made of plastic
AssigneeHilti Aktiengesellschaft
InventorsSteffen MUCHA, Daniel SELTMANN
Life of this patent
Estimating the term…
Abstract
A shaft-hub connection arrangement for transmitting torques between a metallic shaft (1) and a plastic hub (2) connected in a positive-locking manner thereto, wherein the shaft (1) is provided with at least one longitudinal groove (3), concave in cross-section, at least in the connecting region, and in that the hub (2) is provided correspondingly with a folding lever that extend inwards from the inner wall (6) and come to rest in a positive-locking manner in groove flank regions (5a, 5b) of the longitudinal groove (3) on both sides.
Claims12
1-11. (canceled)
12:
- A shaft-hub connection arrangement for transmitting torques between a metallic shaft and a plastic hub connected in a positive-locking manner thereto, the shaft-hub connection arrangement comprising:
- at least one longitudinal groove, concave in cross-section, of the shaft in a connecting region;
- and
- folding lever means in the connecting region and extending inwards from an inner wall of the hub and resting in a positive-locking manner in groove flank regions of the longitudinal groove on both sides.
1 more element
13:
- The shaft-hub connection arrangement as recited in claim 11 wherein the folding lever means comprise at least two lever legs extending from a same starting point on the inner wall and extending inwardly therefrom in a V-shape.
14:
- The shaft-hub connection arrangement as recited in claim 11 further comprising locking tongues facing one another are pivotably formed in the distal end region of the lever legs.
15:
- The shaft-hub connection arrangement as recited in claim 14 wherein the locking tongues nestle against a groove base region of the longitudinal groove in a locked position.
16:
- The shaft-hub connection arrangement as recited in claim 11 wherein the at least one longitudinal groove includes several concave longitudinal grooves arranged adjacent to one another over the circumference of the shaft so as to define a star profile.
17:
- The shaft-hub connection arrangement as recited in claim 13 further comprising an insert for locking the lever legs, the insert arranged in an intermediate space formed by the lever legs.
18:
- The shaft-hub connection arrangement as recited in claim 11 wherein a clearance fit exists axially between the inner wall of the hub and an enveloping circle diameter of the shaft.
19:
- The shaft-hub connection arrangement as recited in claim 11 wherein the shaft is designed as a gear shaft.
20:
- The shaft-hub connection arrangement as recited in claim 11 wherein the hub is a component of a gear wheel.
21:
- The shaft-hub connection arrangement as recited in claim 20 wherein the gear wheel is designed as a toothed wheel, a friction wheel, or a belt pulley.
22:
- An electric hand tool comprising:
- a drive unit connected to a gear unit via a shaft-hub connection arrangement according to one of the preceding claims.