SELF-BLOCKING SYSTEM COMPRISING A PLANETARY REDUCER FOR WHEEL CHAIRS

摘要

The invention relates to a self-blocking system comprising a planetary reducer for wheel chairs, comprising a self-blocking planetary transmission (1) with a reducing transmission ratio, and a set (2) of elements for interconnection between axles, enabling the connection and disconnection of said axles as if by clutches. Said planetary transmission (1) comprises a first toothed wheel (R1) rigidly fixed to an axle (E3), a second toothed wheel (R4) rigidly fixed to the housing of the transmission (1), with zero velocity, and at least one planet member formed by two toothed wheels (R2) and (R3) that are rigidly fixed to the same axle (E2) and rotate at the same time as they are engaged with the first toothed wheel (R1), the second toothed wheel (R4), and with said axle (E2), in relation to a traction axle (E1) that can connect to, or disconnect from, the axle (E5) of the propulsion system (3) by means of a central interconnection element (I1).