Means for reconfiguring a wheelchair are disclosed wherein a user or an occupant of the wheelchair is enabled to repeatably alternate the wheelchair between an original load-bearing configuration and a modified load-bearing configuration by engaging and disengaging a ground-contacting adaptive implement operatively connected to a load transitioning mechanism, said load transitioning mechanism adapted for connection to a forward portion of the wheelchair. Embodiments according to the present invention enable an occupant of the wheelchair to alternate the wheelchair, through a cyclic operation sequence, between the original configuration and the modified configuration by toggling of a manipulable switch and subsequent momentary reclining of the wheelchair. The user willfully effectuates a change in the angular disposition of the ground-contacting adaptive implement relative to the wheelchair about a substantially horizontal joint axis wherein in the modified configuration a deployed angular orientation is maintained under load-bearing conditions during travel of the wheelchair in all directions. Embodiments of the present invention enable wheelchair reconfiguration with simplicity of operation while ensuring rigid attachment of a ground-contacting adaptive implement to the wheelchair to confer special functionalities to the wheelchair while preserving comfort and safety for the user while the wheelchair is in the modified load-bearing configuration.

An electric wheelchair with quick-release drive wheels includes: a chassis, and two guide wheels and two said drive wheels. The drive wheels are rotated by a drive mechanism and connected to the drive mechanism by a quick-release mechanism. To detach the drive wheel, the user can press the cover to make the rolling balls move out of the receiving groove and back to the arc-shaped engaging portion, which allows the hollow shaft to disengage from the drive shaft. Then, keeping pressing the cover can detach the drive wheel from the drive mechanism. To assemble the drive wheel, the user can press the hollow shaft into the axial hole to make the rolling balls engage in the receiving groove, so that the drive wheel is assembled to the drive mechanism. The assembly and disassembly of the drive wheel require no wrenches or other tools, and therefore are very convenient.

A geared wheel system for minimizing backlash is functionally coupled to a wheelchair and disclosed herein.

Example embodiments are related to a wheel coupling system for a vehicle. The wheel coupling system according to example embodiments may include a torque transmission element having a rotatable member to generate a torque force and a torque receiver for releasably engaging the torque transmission element. The wheel coupling system may further include a wheel coupled to the torque receiver such that removal of the wheel disengages the torque receiver from the torque transmission element to allow the torque transmission element to remain intact.

A wheelchair (100) includes a chassis (101) defining a seat (102), a backrest (103), one or more armrests (104,105), and an undercarriage (106). One or more front caster wheels (118,119) are coupled to, and selectively detachable from, the undercarriage. One or more rear wheel assemblies (120,121) each include a rear wheel (125), an axle (127), and a mounting post (129) extending distally from the axle at a substantially orthogonal angle relative to the axle. One or more quick release devices (130,131) couple each mounting post of each rear wheel assembly to the undercarriage such that the each the one or more rear wheel assemblies is selectively detachable from the undercarriage.

A wheelchair (100) includes a chassis (101) defining a seat (102), a backrest (103), one or more armrests (104,105), and an undercarriage (106). One or more front caster wheels (118,119) are coupled to, and selectively detachable from, the undercarriage. One or more rear wheel assemblies (120,121) each include a rear wheel (125), an axle (127), and a mounting post (129) extending distally from the axle at a substantially orthogonal angle relative to the axle. One or more quick release devices (130,131) couple each mounting post of each rear wheel assembly to the undercarriage such that the each the one or more rear wheel assemblies is selectively detachable from the undercarriage.

It is an object to improve riding comfort of a wheelchair having a folding mechanism by keeping an operation part of the folding mechanism from contacting a wheelchair user seated. A folding mechanism includes an operation part for use in changing a state of a left-side support arm and a right-side support arm from one of a folded state or an unfolded state to another. The operation part is arranged below an upper end part of a seat frame with a predetermined space therebetween.

An assistance system for a manual wheelchair and a manual wheelchair equipped therewith, the system including a fastening base configured to be fixed to a manual wheelchair frame, a battery, a motor module including at least a first electric motor configured to drive a wheel of the motor module in rotation.

An auxiliary drive device for a wheelchair has at least one freely pivotable electrically driven drive wheel and a coupling mechanism for coupling the auxiliary drive device to the wheelchair. The coupling mechanism includes a movable locking element which is movably supported in the coupling mechanism. The movable locking element can be in a locking position in which it causes locking in a positive-locking manner so that the auxiliary drive device is coupled to the wheelchair and, by operation of a handle, the locking element can be moved in a release position in which uncoupling of the auxiliary drive device from the wheelchair is possible.