Drive
shaft [17] and sleeve [28] are advantageously held concentrically
and axially with respect to each other by means of a bearing housing
[22] rigidly connected to shaft [17].
The bearing housing [22] is provided with an
axial and radial thrust bearing [23], so as to permit free rotation
of shaft [17] independently of sleeve [28].
The bearing housing [22] is an integral part
of shaft [17] at the boundary of the straight splines of the abuting
ends which serve to couple shaft [17] to shaft [18] of the short-stroke
crankshaft [5].
The bearing housing [22] and sleeve [28] are
located inside the engine unit [1].
The bearing housing [22] is shaped as a disk
which also serves as a flywheel.
The periphery of said flywheel is regularly
pierced with holes [24], so as to permit a ring [25] to be bolted
onto the surface of the flywheel opposite the side where the boundary
of the straight splines is located.
The mounting of ring [25] on the flywheel of
the bearing housing [22] serves to form a recess, so as to permit
the mounting of the outer ring [26] of the axial and radial thrust
bearing [23].
The inner ring [27] of bearing [23] is mounted
on the sleeve [28] against a ring-shaped spacer [29] encircling
sleeve [28].
The spacer [29] serves to take up the space
between the inner ring [27] of bearing [23] and the inner ring of
the angular contact bearing [16], the latter being held axially
against a shoulder of sleeve [28] through the securing of all above
parts, by means of a single nut [30] on sleeve [28].
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