Abstract: A ball bearing for use in a high-temperature, high-speed, light-load environment is proposed which includes inner and outer rings formed of heat-resistant bearing steel M50. A nitrided layer which is formed of a diffusion layer only is formed on each of the surfaces of the inner and outer rings where the raceways are formed. A chromium nitride film is further formed on the nitrided layer. The layer and film serves to prevent surface-starting peeling and smearing, thus prolonging the life of the bearing.

Abstract: There is provided a roller thrust bearing providing reduced differential slip, free of significant friction and wear, and providing increased longevity against flaking. The present invention provides a thrust bearing in the form of a roller thrust bearing including at least two radially arranged rows of rollers and a cage holding the rollers, the rollers including at least one roller crowned.

Abstract: A hydraulic clutch assembly is equipped with a spring-drive hydraulic clutch, which includes a gear rotatably mounted on a transmission shaft and a clutch cylinder fixedly mounted on the transmission shaft, first and second friction elements respectively supported on the gear and the clutch cylinder in such a manner as to be slidable along an axis of the clutch (hereinafter sometimes referred to a clutch axis) and relatively non-rotatable thereto, a pressure disk disposed opposite to the friction elements, and a spring for moving the pressure disk towards the friction elements to bring the first friction element into engagement with the second friction element, in which the pressure disk is moved away from the friction elements by an effect of hydraulic pressure, thereby withdrawing the friction elements from engagement with each other.

Abstract: There is provided a roller thrust bearing providing reduced differential slip, free of significant friction and wear, and providing increased longevity against flaking. The present invention provides a thrust bearing in the form of a roller thrust bearing including at least two radially arranged rows of rollers and a cage holding the rollers, the rollers including at least one roller crowned.

Abstract: A slidable and rotatable first control shaft (61) and a slidable and rotatable second control shaft (67) for respectively shifting main and auxiliary speed change mechanisms (26, 29) project outwardly to one side of a vehicle housing (2) and are connected respectively to a main change lever (74) and an auxiliary change lever (75) which are pivotally supported by a support member (70) fixedly provided at one side of the vehicle housing. Preferably, the main change lever is disposed at a location where an operator on a seat (76) can operate the lever easily whereas the auxiliary change lever is disposed at a location where the operator is hard to operate the lever. The support member is preferably composed of a cover member which surrounds the control shafts, lower portions of the change levers, and connecting members (80, 87) therebetween. An opening (70b) provided to the cover member for assembling the connecting members is closed by a closure member (70c).

Abstract: A hydraulic clutch including: a gear rotatably mounted on a transmission shaft and a clutch cylinder fixedly mounted on the transmission shaft; a first group of friction elements respectively and relatively non-rotatably supported on the gear and the clutch cylinder in such a manner as to be slidable along an axis of the clutch; a pressure disk disposed opposite to the first group of friction elements; a spring for moving the pressure disk towards the first group of friction elements to bring the friction elements into engagement with each other; a piston disposed in such a manner as to be sidable along the axis of the clutch on the opposite side of the pressure disk with the first group of friction elements therebetween, thereby forming a hydraulic fluid chamber within the clutch cylinder; an operation disk disposed in such a manner as to be sidable along the axis of the clutch between the piston and the first group of friction elements; and an interlocking rod extending along the axis of the clutch for inte

Abstract: Two fluid-operated supplementary speed change mechanisms (9, 10), one of which is formed into a direction-reversing mechanism and the other of which is formed into a high/low speed-selecting mechanism, are provided in a front housing 1 at locations before and behind a bearing support wall (4) which divides the inside of the front housing into front and rear chambers. Two transmission shafts (8, 12), on which fluid-operated clutches (38F, 38R, 45, 46) of the supplementary speed change mechanisms are mounted, are disposed non-coaxially and are supported by the bearing support wall, and rotary joints (54F, 54R, 54L, 55H, 55L) for connecting fluid passages (51F, 51R, 51L, 52H, 52L) in the transmission shafts, which passages are in fluid communication with the fluid-operated clutches, to stationary fluid passages are formed in outer circumferences of the transmission shafts within an inside of the single bearing support wall.

Abstract: A drive gear (37) having integral drive teeth (37a) is rotatably mounted on a transmission shaft (36) for transmitting power to front wheels, and a movable clutch member (52) having integral driven teeth (52a) engageable with the drive teeth is slidably but non-rotatably mounted on the transmission shaft. A spring (54; 54A) for biasing the movable clutch member into a direction of causing engagement of the driven teeth with the drive teeth is inserted at a part thereof into an axial bore (52b) in the clutch member. A piston (54) is slidably fitted in a cylinder member (55) which is fixedly mounted on the transmission shaft at a radially inward location of the drive and driven teeth. The transmission shaft includes a fluid passage (60) which applies fluid pressure to the piston such that the piston is moved so as to move the movable clutch member into a direction of causing disengagement of the driven teeth from the drive teeth.

Abstract: Two fluid-operated supplementary speed change mechanisms (9, 10), one of which is formed into a direction-reversing mechanism and the other of which is formed into a high/low speed-selecting mechanism, are provided in a front housing 1 at locations before and behind a bearing support wall (4) which divides the inside of the front housing into front and rear chambers. Two transmission shafts (8, 12), on which fluid-operated clutches (38F, 38R, 45, 46) of the supplementary speed change mechanisms are mounted, are disposed non-coaxially and are supported by the bearing support wall, and rotary joints (54F, 54R, 54L, 55H, 55L) for connecting fluid passages (51F, 51R, 51L, 52H, 52L) in the transmission shafts, which passages are in fluid communication with the fluid-operated clutches, to stationary fluid passages are formed in outer circumferences of the transmission shafts within an inside of the single bearing support wall.

Abstract: A slidable and rotatable first control shaft (61) and a slidable and rotatable second control shaft (67) for respectively shifting main and auxiliary speed change mechanisms (26, 29) project outwardly to one side of a vehicle housing (2) and are connected respectively to a main change lever (74) and an auxiliary change lever (75) which are pivotally supported by a support member (70) fixedly provided at one side of the vehicle housing. Preferably, the main change lever is disposed at a location where an operator on a seat (76) can operate the lever easily whereas the auxiliary change lever is disposed at a location where the operator is hard to operate the lever. The support member is preferably composed of a cover member which surrounds the control shafts, lower portions of the change levers, and connecting members (80, 87) therebetween. An opening (70b) provided to the cover member for assembling the connecting members is closed by a closure member (70c).