Systems Operation 784C, 785C and 785C HAA Off-Highway Truck/Tractors Power Train, страница 2

Only No. 3 clutch (9) is engaged in NEUTRAL-1. No input clutches are engaged. Torque is transferred from the transfer gears to input shaft (1). Rotating housing (2) is splined to input shaft (1). Rotating housing (2) turns with input shaft (1). Rotating housing (2) spins the plates of No. 1 clutch (5). Because No. 1 clutch (5) is not engaged, ring gear (28) is not held. Rotating housing (2) spins the plates of No. 2 clutch (6). Because No. 2 clutch (6) is not engaged, coupling ring gear (27) is not held.

Ring gear (28) and coupling ring gear (27) are not held. Torque is not transferred to planetary carrier (29) and center shaft (7) is not driven.

No. 3 clutch (9) is engaged. The discs of the No. 3 clutch hold coupling hub (26). Sun gear (10) is splined to center shaft (7). Because no input torque has been transferred to center shaft (7), there is no output torque.

Power Flow in NEUTRAL-2

No. 1 clutch (5) is engaged in NEUTRAL-2. Torque is transferred from the transfer gears to input shaft (1). Rotating housing (2) is splined to input shaft (1). Rotating housing (2) turns with input shaft (1). Rotating housing (2) spins the plates of No. 1 clutch (5). Because No. 1 clutch (5) is engaged, the discs of the No. 1 clutch hold ring gear (28) .

Ring gear (28) turns with rotating housing (2) and input shaft (1). Sun gear (3) is splined to a stationary shaft. Sun gear (3) does not turn. Planetary gears (4) move around the outside of sun gear (3). This drives planetary carrier (29). Planetary carrier (29) turns in the same direction as input shaft (1), but at a different speed. Planetary carrier (29) is splined to center shaft (7). Center shaft (7) and planetary carrier (29) are driven in the same direction and at the same speed.

No output clutches are engaged. The torque is not transmitted through spinning clutch discs and plates. Torque does not flow to the output shaft.

Power Flow in FIRST Speed

No. 1 clutch (5) and No. 5 clutch (14) are engaged in FIRST speed. Torque is transferred from the transfer gears to input shaft (1). Rotating housing (2) is splined to input shaft (1). Rotating housing (2) turns with input shaft (1). Rotating housing (2) spins the plates of No. 1 clutch (5). Because No. 1 clutch (5) is engaged, the discs of the No. 1 clutch hold ring gear (28) .

Ring gear (28) turns with rotating housing (2) and input shaft (1). Sun gear (3) is splined to a stationary shaft. Sun gear (3) does not turn. Planetary gears (4) move around the outside of sun gear (3). This drives planetary carrier (29). Planetary carrier (29) turns in the same direction as input shaft (1), but at a different speed. Planetary carrier (29) is splined to center shaft (7). Center shaft (7) and planetary carrier (29) are driven in the same direction and at the same speed.

Sun gear (15) is splined to center shaft (7). Sun gear (15) turns planetary gears (23). No. 5 clutch (14) is engaged. The discs of No. 5 clutch (14) hold ring gear (13) stationary. Planetary gears (23) move around the inside of ring gear (13). This drives the planetary carrier and output shaft (20) .

The output shaft turns in the same direction as input shaft (1), but at a different speed.

Power Flow in SECOND Speed

No. 2 clutch (6) and No. 5 clutch (14) are engaged in SECOND speed. Torque is transferred from the transfer gears to input shaft (1). Rotating housing (2) is splined to input shaft (1). Rotating housing (2) turns with input shaft (1). Rotating housing (2) spins the plates of No. 2 clutch (6). Because No. 2 clutch (6) is engaged, the discs of the No. 2 clutch hold coupling ring gear (27) .