Multi-mode splined ball screw assembly

Details Multi-mode splined ball screw assembly Multi-mode splined ball screw assembly

1991-01-10

1991-12-03

Herrmann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

74 8915, F16H 2920, F16H 120

Patent

active

050690817

ABSTRACT:
A multi-mode splined ball screw assembly includes a first shaft, a hollow second shaft and a hollow third shaft. The first shaft extends into the hollow second shaft and a ball spline structure is provided between the first and second shafts so that they may move relative to each other in the longitudinal direction. The second shaft extends into the third shaft and a ball screw structure is provided between the second and third shafts so that they may rotate relative to each other. The first shaft is rotatably supported by a housing and the third shaft has an outer peripheral surface, a part of which is defined as a ball spline surface section and another part of which is defined as a ball screw surface section. Another ball spline structure is provided between the housing and the ball spline surface section and another ball screw structure is provided between the housing and the ball screw surface section. Thus, the present assembly has a nested structure and can provide a number of different modes of operation.

REFERENCES:
patent: 1420113 (1922-06-01), Kuehn et al.
patent: 2298717 (1942-10-01), Nardone
patent: 3046808 (1962-07-01), Demart
patent: 3404580 (1968-10-01), Valenti
patent: 3640147 (1972-02-01), Fantoni
patent: 4000661 (1977-01-01), Menzel
patent: 4685344 (1987-08-01), Horn et al.

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