| 摘要 |
A side frame assembly (2) for a wheelchair suspension includes a mainframe (3), and a front caster frame (41) connected pivotally to both a front end of the mainframe (3) and a front caster (42). A return spring (5) is disposed between the front caster frame (41) and the mainframe (3) so as to bias the front caster (42) to a predetermined position. A drive wheel assembly (6) includes a drive wheel frame (61), a drive wheel (62) disposed pivotally on the drive wheel frame (61), and a driving unit (63) operable to rotate the drive wheel (62). A linkage (7) is connected pivotally to the mainframe (3), the front caster frame (41) and the drive wheel frame (61). A rear caster assembly (8) includes a rear caster frame (81) attached to a rear end of the mainframe (3), and a rear caster (82) disposed pivotally on the rear caster frame (81). |
