REDUCTION GEAR SHIFTING DEVICE

WIPO Patent Application WO/1981/000439

A1

This reduction gear shifting device is employed in shifting the working speed of an agricultural tractor and is adapted to shift, in a simple manner, between a certain set rotational speed and reduced rotational speed slightly lower than the set speed. According to this device, the sun gear (30b) of a planetary gear mechanism is either coupled to an output shaft (12) or rendered stationary via a clutch (41) and a brake (42) provided at the axial side of an internal gear (7a). A supporting frame (17) for journaling the shaft (12) internally accommodates the clutch (41) and the brake (42) together with the internal gear (7a) to thereby install them at the front transmission case (3). The clutch (41) and the brake (42) are of a frictional multi-disk type in which at least one frictional plate (33) in one member is connected to at least one in the other member so as to move in the same direction. The brake (42) is so adapted that the supporting frame (17) serves as a stationary side member. The piston (40) for operating the clutch (41) and the brake (42) is movably fitted over a collar (36) fitted over the outside of a center boss (30c) of a housing (30) incorporating the sun gear (30b).

JPS5842384	[Title of the Invention] A multi stage gearbox which can be switched under load
JP2548901	[Name of invention] Idler bearing device for transmission

NISHIHARA T (JP)
HIYODO O (JP)

PCT/JP1979/000208

February 19, 1981

August 08, 1979

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ISEKI AGRICULT MACH
NISHIHARA T
HIYODO O

F16H3/08; F16H3/54; F16H37/04; (IPC1-7): F16H3/54; F16H5/18

JPS49105065A	1974-10-04
JP13002839B1
JP10006727B

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