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power flow through a Power Wheel planetary gear drive? 
 
Planetary gearboxes, Planetary track and wheel drivesWheel Drive, Single Reduction 

1. Coupling (1) rotates in the direction of motor shaft rotation(cw) 
2. Input shaft (2) splined to coupling (cw) 
3. Sun gear (3) splined to input shaft (cw) 
4. Planet gears (4) rotate opposite sun gear (ccw) 
5. Planet gears (4) drive ring gear (5) in same direction (ccw) 
6. Ring gear (5) is attached to the hub (6), hub rotates (ccw) 
7. Hub (6) is attached to wheel/rim, wheel rotates (ccw) 


 
Planetary gearboxes, Planetary track and wheel drivesWheel Drive, Double Reduction 

1. Coupling (1) rotates in the direction of motor shaft rotation (ccw) 
2. Input shaft (2) splined to coupling (ccw) 
3. Primary sun gear (3) splined to input shaft (ccw) 
4. Planet gears (4) rotate opposite sun gear (cw) 
5. Primary carrier (5) rotates opposite planet gears (ccw) 
6. Secondary sun gear (6) attached to primary carrier (5) (ccw) 
7. Secondary planet gears (7) rotate opposite sec. sun gear (6) (cw) 
8. Ring gear (8) rotates same direction as sec. planet gears (7) (cw) 
9. Hence driving the hub (9) (cw) 
10. Hub (9) attached to wheel/rim (cw) 

 
Planetary gearboxes, Planetary track and wheel drivesShaft/Spindle Output, Single Reduction 

1.Sun gear (1) rotates in the direction of motor shaft rotation (cw) 
2. Planet gears (2) rotate opposite sun gear (1) (ccw) 
3. Carrier (3) is driven in the same direction as the sun gear (1) (cw) 
4. Spindle or shaft (4) is splined to carrier (3), therefore it rotates (cw) 

 
Planetary gearboxes, Planetary track and wheel drivesShaft/Spindle Output, Double Reduction 

1. Primary sun gear (1) rotates in the direction of motor shaft rotation (ccw) 
2. Primary planet gears (2) rotate (cw) 
3. Primary carrier (3) driven (ccw) 
4. Secondary sun gear (4) attached to primary carrier (3) (ccw) 
5. Secondary planets (5) rotate opposite secondary sun gear (4) (cw) 
6. Secondary carrier (6) driven (ccw) 
7. Output spindle or shaft (7) splined to secondary carrier assembly (6) (ccw) 
 


Tags: Planetary Gearboxes, Application of Planetary Gearboxes

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