Chapter 7 Reduction and Reversing
Gear
(KM3P)
_J._C_on_s_t_r_uc_t_w_n
____________________________
~4JH~BXC)E
Marine Gear Models
KM3P
for
Engine Models 3JH3E
4JH3E
1 . Construction
1-1. Construction
This clutch is a cone-type, mechanically operated clutch.
When the drive cone (which is connected to the output
shatt
by
the lead spline)is moved forward
or
backward,
its taper contacts with
the large gear and transfers power
to the output shaft.
The construction is simple when compared with other
types of clutch and
if
serves
to
reduce the number
of
components, making for a lighter, more compact unit
which can be operated smoothly. Although
it is Small,
the power transmission efficiency is high even under
a heavy load. Its durability is high and
it
is also reliable
because high grade materials are used for the shaft
and gear, and. a taper
roller bearing is incorporated.
Power transmission is smooth because connection with
the engine is made through the damper disc.
• The drive cone
is made from special aluminum
bronze which has both higher wear-resistance and
durability. The drive cone is connected with the
output shaft through the thread sp!lne. The taper
angle, diameter
ot the drive cone, twist angle, and
diameter of the thread spline, are designed
to
give the
greatest efficiency, thus ensuring
that
the drive cone
can
be
readily engaged or disengaged,
• Helical gears are used for greater strength.
The
intermediate
shaft
is
supported
at
2
points
to
reduce deflection and gear noise,
•
The
clutch
case
and
mounting
flange
are
made
tram
an
aluminum
alloy
of
special
composition
to
reduce
weight
Printed
in
Japan
HINSHI-H8009
7-29
ft
is also anticorrosive against seawater.
• As the damper disc is fitted to the input shaft, power
can be transmitted smoothly.
• There is small clearance between the dipstick and the
Inside of the dipstick tube.
A small hole
in
the dip-
stick works as a breather.
• When the !oad on the propeller is removed, the
engagement
of
the drive cone and the large gear is
maintained by the shifter and V-groove of the drive
cone. Even when the drive cone's tapered area and
V-groove are worn, this engagement is maintained by
the shift lever device and accordingly no adjustment of
the
remote control cable is required.
• The cup spring on the rear of the larger gear absorbs
rotational fluctuations and stabilizes the engagement
of the drive cone and the larger gear. Thus, the
durability of the cone against wear is enhanced.
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