Energy-saving electric drive for small vehicles
OwnerGerhard Rieplinventor
Life of this patent
Estimating the term…
Abstract
An electric drive for small vehicles, especially wheelchairs, includes a d.c. motor, which is arranged as a wheelhub motor in the running wheel of the small vehicle. Efficiency and manufacturing costs are improved, while ensuring simple assembly, wherein the possibility of automatically locking the running wheels is provided, along with a short and lightweight design. The d.c. motor is an external rotor motor, whose external rotor forms the wheelhub or the wheel rim of the running wheel. The stator of the d.c. motor is stationarily connected to the small vehicle via a brake housing (3). A central spring pressure brake is provided which can be released electromagnetically and manually and brakes the external rotor of the d.c. motor in the case of a power failure.
Claims11
An electric drive for a running wheel of a small vehicles such as wheelchairs, comprising:
- a small vehicle running wheel;
- a d.c. motor arranged as a wheel hub motor in said running wheel, said d.c. motor including an external rotor forming one of a wheel hub or a wheel rim of said running wheel and a stator;
- a brake housing, said stator being fixedly connected to said brake housing and said brake housing being fixedly connected to said small vehicle;
- a central spring pressure brake disposed in said brake housing;
- an electromagnetic spring brake release means for being powered to maintain said central spring pressure brake disengaged and for releasing said spring pressure brake in the case of a power failure for braking said external rotor;
- and
- manual release means for manually releasing said spring pressure brake.
An electric drive for a running wheel of a small vehicles such as wheelchairs, comprising:
- a small vehicle running wheel,
- a d.c. motor arranged as a wheel hub motor in said running wheel, said d.c. motor including an external rotor forming one of a wheel hub or a wheel rim of said running wheel and a stator;
- a brake housing, said stator being stationarily connected to said small vehicle via said brake housing, said brake housing including a pot-shaped part fastened to said stator, on a side of said d.c. motor opposite said external rotor;
- a central spring pressure brake disposed in said brake housing, said central spring pressure brake including a brake disc and a spring loaded pressing plate disposed in said housing;
- a coupling pin of a wheel hub shaft of said external rotor, said brake disc being arranged on said coupling pin, said coupling pin extending into said brake housing, said brake disc being non-rotatably and axially displaceably connected to said coupling pin, said pressing plate being non-rotatably and axially displaceably guided in said brake housing;
- an electromagnetic spring brake release means for being powered to maintain said central spring pressure brake disengaged and for releasing said spring pressure brake in the case of a power failure for braking said external rotor;
- and
- manual release means for manually releasing said spring pressure brake.
An electric drive for a running wheel of a small vehicles such as wheelchairs, comprising:
- a small vehicle running wheel;
- a d.c. motor arranged as a wheel hub motor in said running wheel, said d.c. motor including an external rotor forming one of a wheel hub or a wheel rim of said running wheel and a stator,
- a brake housing, said stator being stationarily connected to said small vehicle via said brake housing, said brake housing having a control space located on a side opposite said external rotor;
- a power electronic unit disposed in said control space, said housing including a cover for opening and closing said control space;
- a central spring pressure brake disposed in said brake housing;
- an electromagnetic spring brake release means for being powered to maintain said central spring pressure brake disengaged and for releasing said spring pressure brake in the case of a power failure for braking said external rotor;
- and
- manual release means for manually releasing said spring pressure brake.
An electric drive for a running wheel of a small vehicles such as wheelchairs, comprising:
- a small vehicle running wheel;
- a d.c. motor arranged as a wheel hub motor in said running wheel, said d.c. motor including an external rotor forming one of a wheel hub or a wheel rim and a stator;
- a brake housing, said stator being stationarily connected to said small vehicle via said brake housing, said brake housing includes a pot-shaped part fastened to said stator, on a side of said d.c. motor opposite said external rotor;
- a central spring pressure brake disposed in said brake housing, said central spring pressure brake including a brake disc and a spring loaded pressing plate disposed in said housing;
- a coupling pin of a wheel hub shaft of said external rotor, said brake disc being arranged on said coupling pin, said coupling pin extending into said brake housing, said brake disc being non-rotatably and axially displaceably connected to said coupling pin, said pressing plate being non-rotatably and axially displaceably guided in said brake housing;
- an electromagnetic spring brake release means for being powered to maintain said central spring pressure brake disengaged and for releasing said spring pressure brake in the case of a power failure for braking said external rotor;
- and
- manual release means for manually releasing said spring pressure brake, said manual release means including a release bar extending coaxially to said wheel hub shaft, said release bar having a circular, radially outwardly directed collar, on a stator side, said release bar extending on said stator side behind said pressing plate thlough a central passage hole of said pressing plate, said release bar including a release surface for moving said pressing plate axially against a spring force of said spring means to release said spring pressure brake.
Dependencies are inferred from the claim text.