| 摘要 |
In a differential with a housing (18) driven by an input shaft (12), pinion (14) and ring gear (16) there are provided pinions (28) on transverse shafts (30), the pinions being in mesh with bevel gears (26) on half shafts (24). The pinion shafts (30) are mounted in a cylindrical carrier (32) which is rotatable within the housing (18). A multiplate clutch (34, 36) can clutch the carrier to the housing. A piston (46) controls the clutch through pendulum levers (54) which also lock the differential by engaging in notches (62) or friction liners in the pinions (28) in the illustrated position, i.e. with the piston chamber (48) connected to sump and the piston urged fully to the left by a return spring (50). At an intermediate pressure in the chamber (48), the levers (54) disengage from the notches (62) or friction liners to unlock the differential but the clutch (34, 36) remains engaged under the action of a spring loaded ring (68) acting between the levers (54) and the clutch pressure plate (40). This provides for normal differential action. At a high pressure the clutch is disengaged so that the back drive from the wheels on the half shafts (24) only drives the carrier (32), not the housing (18) and input shaft (12).
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