Torque Sensor - Kubota G21LD / G21HD Workshop Manual

G21LD · G21HD, WSM

(2) Torque Sensor

Operation
Construction
The torque sensor senses the steering power and
rotating direction, convert them into a voltage signal and
outputs the signal to the EPS controller. The torque
sensor section is composed of a slider (3), detecting ring
and detecting coil (4) (slider and detecting ring are
combined). The slider (3) is held by the slider pin (2)
connected to the input shaft (1) and output shaft (5).
A thread groove and longitudinal groove (in the axial
direction) are provided on the inside of the slider. The
relative change of the rotating direction of the input shaft
(1) and output shaft (5) is converted into a movement in
the slider axial direction.
(1) Input shaft
(2) Slider Pin
(3) Slider
When a torsion torque is generated via the torsion bar
between the input shaft (1) and output shaft (5) as a
result of the steering wheel being turned, the input-shaft-
side slider pin moves along the thread groove of the
slider and makes the slider shift in the axial direction.
The slider shifting direction and distance are detected as
the amount of electrical change between the detecting
ring and detecting coil and transmitted to the EPS
controller.
A : Torque Sensor Output
B : Output Voltage (V)
C : Voltage
5-M3
STEERING
(4) Detecting Ring and Detecting
Coil
(5) Output Shaft
W1013290
(1) Input Shaft
(2) Slider Pin
(3) Slider
(4) Detecting Ring and Detecting
Coil
(5) Output Shaft
A : Steering wheel turned
counterclockwise
B : Steering wheel in neutral
position
C : Steering wheel turned
clockwise
D : 1 mm (0.04 in.)
W1013543
D : Steering Direction
E : Left
F : Right
W1013984
KiSC issued 08, 2007 A