Gear shift arrangement for a vehicle

Details Gear shift arrangement for a vehicle Gear shift arrangement for a vehicle

F - Mech Eng,Light,Heat,Weapons

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F16H 63/34 (2006.01) F16H 59/04 (2006.01) F16H 59/56 (2006.01) F16H 63/46 (2006.01)

Patent

CA 1175320

GEAR SHIFT ARRANGEMENT FOR A VEHICLE Abstract of the Disclosure A vehicle, such as a tractor, has a main change-speed gear with an associated clutch and a load shift gear coupled to a selector rod. The load shift gear can be shifted under load between a normal position and an under-speed position which produces increased tractive effort by reducing the speed by about 20%. This load shift gear can be operated by the same lever as operates the main change speed gear. In order to prevent simultaneous operation of the main gear and the load change gear, with corresponding interference with the synchronization of the main gear, an interlock device is provided. The interlock device includes a bellows which is connected into the hydraulic circuit for the clutch and, when the cluch pedal is depressed, the bellows holds a plunger in interlocking engagement with one of two grooves in the selector rod which is mechanically coupled to the load change gear. In other embodiments, a mechanical linkage between the clutch pedal and the interlock device is provided.

410117

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