Hub motor arrangements, systems, and methods
Various hub motor arrangements, systems, and methods are disclosed. The hub motor arrangement may include a transmission assembly to provide increased torque. The transmission assembly may include a motor gear, a planetary gear, an idler gear, and a ring gear. The idler gear may be positioned farther away from an axis of rotation of the hub motor arrangement compared to the planetary gear. The motor gear may drive the planetary gear, the planetary gear may drive the idler gear, and idler gear may drive the ring gear. The rotation of the ring gear may rotate a housing of the hub motor arrangement to propel a vehicle incorporating the hub motor arrangement.
1. A hub motor arrangement for a vehicle, the hub motor arrangement comprising:
a housing configured to rotate about a housing axis of rotation on a first axle and a second axle;
a motor unit disposed at least partially within the housing, the motor unit comprising a motor gear;
a first gear and a second gear, the first gear having a first axis of rotation a first distance away from the housing axis of rotation, and the second gear having a second axis of rotation a second distance away from the housing axis of rotation, the second distance larger than the first distance; and
a ring gear inside the housing, the ring gear configured to rotate with the housing;
wherein the motor gear is configured to drive the first gear, the first gear is configured to drive the second gear, and the second gear is configured to drive the ring gear to rotate the housing.
2. The hub motor arrangement of claim 1 , wherein the first axle and the second axle are disposed on opposing sides of the housing.
3. The hub motor arrangement of claim 1 , wherein the first axle and the second axle do not extend through an entirety of the housing.
4. The hub motor arrangement of claim 1 , wherein the first axle and the second axle are configured to be coupled to a vehicle to support the hub motor arrangement.
5. The hub motor arrangement of claim 1 , wherein the first gear is a double gear comprising an outer gear and an inner gear, wherein the motor gear is configured to interface with the outer gear of the first gear, and wherein the inner gear of the first gear is configured to interface with the second gear.
6. The hub motor arrangement of claim 1 , further comprising a first bearing and a second bearing, the first bearing disposed on the first axle between the first axle and the housing, and the second bearing disposed on the second axle between the second axle and the housing.
7. The hub motor arrangement of claim 1 , wherein the ring gear is unitarily formed with the housing.
8. The hub motor arrangement of claim 1 , wherein the ring gear is coupled to the housing.
9. A vehicle comprising the hub motor arrangement of claim 1 , the hub motor arrangement configured to be disposed in a wheel of the vehicle.
10. The vehicle of claim 9 , wherein the vehicle is an electric scooter comprising handle bars, a deck, and a battery.
11. The vehicle of claim 9 , wherein the vehicle is a three-wheeled ride-on vehicle.
12. The vehicle of claim 9 , wherein the vehicle is a four-wheeled ride-on vehicle.
13. The hub motor arrangement of claim 1 , wherein the housing comprises an outer wall, the outer wall comprising a circular profile that tapers in diameter from a middle portion to lateral portions, the middle portion comprising a larger diameter than the lateral portions.
14. A hub motor arrangement for a vehicle, the hub motor arrangement comprising:
a hub configured to rotate about a hub axis of rotation on a first shaft and a second shaft;
a motor disposed at least partially within the hub, the motor comprising a motor gear;
a step gear and an idler gear, the step gear having a first axis of rotation a first distance away from the hub axis of rotation, and the idler gear having a second axis of rotation a second distance away from the hub axis of rotation, the second distance larger than the first distance; and
a ring gear inside the hub, the ring gear configured to rotate with the hub;
wherein the motor gear is configured to drive the step gear, the step gear is configured to drive the idler gear, and the idler gear is configured to drive the ring gear to rotate the hub.
15. The hub motor arrangement of claim 14 , further comprising a gearbox body and a gearbox cover, wherein the step gear and the idler gear are disposed between the gearbox body and the gearbox cover.
16. The hub motor arrangement of claim 15 , wherein the gearbox body and the gearbox cover are disposed within the hub.
17. The hub motor arrangement of claim 15 , wherein the gearbox body comprises a sleeve, the sleeve disposed around the motor.
18. The hub motor arrangement of claim 15 , wherein the gearbox cover comprises a first mount configured to contact the gearbox body to space the gearbox cover away from the gearbox body.
19. The hub motor arrangement of claim 15 , wherein the gearbox body comprises a second mount configured to contact the gearbox cover to space the gearbox cover away from the gearbox cover.