The invention discloses a
mechanical system of a multi-purpose electric bath chair. The
mechanical system comprises a back posture adjusting mechanism, a chair lifting mechanism, a
chassis moving mechanism, a pedal plate protecting mechanism and a
brake mechanism, wherein for the back posture adjusting mechanism, one motor drives two parallel four-bar mechanisms, and the angle between a backrest of the bath chair and a seat board can be adjusted, so that the
sitting posture and the
lying posture can be converted; for the chair lifting mechanism, the height of chair can be adjusted, and the chair lifting mechanism comprises an electric push rod connecting mechanism and a lifting parallel four-bar mechanism; the
chassis moving mechanism is the support component of the whole bath chair, the bath chair adopts universal wheels and directional wheels, and thus moving and steering are convenient; the pedal plate protecting mechanism can be unfolded and folded through a rotation mechanism; forthe
brake mechanism, the braking for the rear wheels, namely, the directional wheels is realized through one set of
crank-link mechanism. The device belongs to the intelligent
nursing type multi-purpose bath chair, the functions including flexible movement, free lifting, posture adjustment,
brake locking and the like are realized, the burden of
nursing staff can be alleviated, and the work including transporting of old people,
bathing, massaging and the like can be assisted.