Speed reducer for walk assist apparatus

Details Speed reducer for walk assist apparatus Speed reducer for walk assist apparatus

2008-07-29

2008-07-29

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

Planetary gearing or element

Plural planet carriers in series move at different speeds

C475S903000

Reexamination Certificate

active

10526015

ABSTRACT:
A reduction gear (49) for a walking assistance system is provided that includes first to third planetary gear mechanisms (P1to P3) between an input shaft (Si) connected to a motor (48) and an output shaft (So), the second planetary gear mechanism (P2) being disposed radially outside the first planetary gear mechanism (P1) connected to the input shaft (Si), and the third planetary gear mechanism (P3) being disposed outside, in the direction of an axis L, the first planetary gear mechanism (P1). It is therefore possible, while reducing the speed of rotation of the input shaft (Si) in three stages by the first to the third planetary gear mechanisms (P1to P3) and transmitting the rotation to the output shaft (So), to reduce the thickness of the reduction gear (49) compared with a case in which the first to the third planetary gear mechanisms (P1to P3) are disposed so as to be stacked in the direction of the axis (L), thereby improving the appearance when a user is fitted with the walking assistance system.

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