摘要:
A front wheel supporting structure for a motorcycle (1) includes a pair of front forks (10, 20) provided on the right and left sides of a front wheel (2) for supporting the front wheel (2) to a frame (5) of the motorcycle (1). The front forks (10, 20) includes a first front fork (20) which generates a damping force for damping a vibration of the front wheel (2) depending on an amplitude of the vibration, and a second front fork (10) which generates a damping force for damping a vibration of the front wheel not depending on the amplitude of the vibration. By thus combining the front forks (10, 20) having different damping force characteristics, the front wheel supporting structure can absorb vibrations of various velocities and amplitudes.
摘要:
In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge ports (23, 24) of a rear pump (50) are opened at a phase difference relative to respective discharge ports (21, 22) of a front pump (10), and respective pump ports (41, 42) of the front pump (10) and respective pump ports (43, 44) of the rear pump (50) are opened in different side faces (71, 72) of a port block (70).
摘要:
An actuator control device includes a meter-in solenoid valve (V1) and a meter-out solenoid valve (V2) that control the supply and discharge of a working fluid relative to an anti rod-side oil chamber (4a), a meter-in solenoid valve (V3) and a meter-out solenoid valve (V4) that control the supply and discharge of the working fluid relative to a rod-side oil chamber (4b), a plurality of maps defining characteristics of opening areas of the meter-in solenoid valves (V1, V3) and the meter-out solenoid valves (V2, V4) relative to an actuator speed command, and a controller programmed to determine an operating condition of the actuator on the basis of a detection result from a detector that detects operation information relating to the actuator, and select a map to be used in control from the plurality of maps in accordance with the operating condition of the actuator.
摘要:
It is an object of the invention to improve the utility of an electromagnetic absorber system which is disposed in a suspension system of a vehicle and which generates a damping force by a generation force of a motor. The electromagnetic absorber system 18 is equipped with high-speed-motion responding means, thereby obviating an insufficiency of the damping force and a deterioration of the controllability in a high-speed stroke motion. More specifically, a hydraulic absorber 64 is provided in combination with the electromagnetic absorber system such that the hydraulic absorber 64 operates in the high-speed motion in which an electromotive force of the motor 68 exceeds a power source voltage Further, two motors having mutually different T-N characteristics are provided, and the two motors are selectively operated depending upon a stroke speed. Further, a variable resistor is interposed between the motor and the power source, and a resistance value of the variable resistor is increased in the high-speed motion to realize a decrease in a time constant of the motor, etc. Moreover, to cope with a large extent of unevenness of a road surface, an active stroke motion is performed by a drive force of the motor, thereby preventing the high-speed motion from being performed.
摘要:
A working oil supply flow rate to hydraulic actuators (7-9) is controlled on the basis of target operating speeds (C7-C9). When a state in which one of the hydraulic actuators (7-9) has substantially stopped operating is detected, the target operating speed (C7-C9) of that hydraulic actuator is reset at a smaller value. A required flow rate Qb required of the hydraulic pump 22 is calculated using the reset target operating speed, whereupon the target operating speeds are corrected using a flow distribution factor Qr obtained by dividing a possible supply flow rate Qa by the required flow rate Qb. By controlling the working oil supply flow rate to the hydraulic actuators (7-9) on the basis of the corrected target operating speeds, when one of the hydraulic actuators (7-9) substantially stops operating, the supply of working oil to the other hydraulic actuators can be increased quickly.
摘要:
A solenoid actuator (1) attached to hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing (7) and a second bearing (8) supporting the shaft (5) on either sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), and a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8). By providing a plunger exterior oil passage (63) on the outside of the plunger (4) to connect the plunger front chamber (74) to the plunger rear chamber (75), working oil flows through the plunger exterior oil passage (63) every time the plunger (4) strokes, thereby preventing a deposit of contaminant on the plunger (4) without increasing a stroke resistance of the plunger (4).
摘要:
A power steering device for a vehicle includes an input shaft (1) linked to a steering wheel, an output shaft (2) linked to a vehicle wheel, a torsion bar (3) that connects the input shaft (1) to the output shaft (2), and a cylindrical member (13) supported by a housing (12) that is fastened to a vehicle body. The input shaft (1) includes a first input shaft (4) that is inserted into the cylindrical member (13), supported rotatably by the cylindrical member (13), and linked to the steering wheel, and a second input shaft (5) that connects the first input shaft (4) to the torsion bar (3). A connection portion between the first input shaft (4) and the second input shaft (5) is constituted such that a rotation of the first input shaft (4) is transmitted to the second input shaft (5) and the first input shaft (4) is free to move in an axial direction relative to the second input shaft (5).
摘要:
There is provided a fluid pressure drive unit that can fulfill a position holding function stably even when an external force acts during the time when the position is held, the unit being used, for example, for the right and left angle adjustment of a snow plow blade. There is provided a first excessive load relief valve 6 for letting a working fluid escape from a bottom-side pipe line 10a, which connects the bottom-side port of a single-rod double acting cylinder 2 to the bottom side of an operate check valve 4, to a rod-side pipe line 10b, which connects the rod-side port of the single-rod double acting cylinder 2 to the rod side of the operate check valve 4, and there is provided a second excessive load relief valve 7 for letting the working fluid escape from the rod-side pipe line 10b to a tank 3. Also, there is provided a negative pressure preventing check valve 8 for allowing the working fluid to flow into the bottom-side pipeline 10a from the tank 3.
摘要:
A working vehicle that uses the output of an internal combustion engine (30) as a working power and a traveling power includes an accelerator pedal (1) that increases a rotation speed of the engine (30) when depressed and a transmission (40) that shifts a rotation of the engine (30) and applies the shifted rotation to the traveling power. A speed ratio control device of the transmission (40) calculates a first target vehicle speed (Wne) according to the rotation speed of the engine (30), calculates a second target vehicle speed (Wu) according to a depression amount of the accelerator pedal (1), and controls the speed ratio of the transmission (40) on the basis of the smaller of these target vehicle speeds. As a result, a vehicle speed according to the depression amount of the traveling accelerator pedal (1) is obtained even when the internal combustion engine (30) rotates at high speed.
摘要:
A torque sensor (50) comprises a magnetic collecting ring (91, 92) fitted into an annular groove (31, 32) formed on the inner periphery (38) of a housing (30). By providing a staking part (33, 34) on the inner periphery (38) of the housing (30) in the vicinity of the annular groove (31, 32) using a staking device (100), the magnetic collecting ring (91, 92) can be secured in the annular groove (31, 32) through a simple process.