3-24
3
FUNCTION
SWIVEL JOINT
SWIVEL JOINT
The swivel joint is mounted in the center of the machine’s
slew axis. It serves the role of maintaining continuous con-
nections
in the hydraulic circuit, regardless of the upper
frame slew angle.
The
ports (3) are fitted on the hub (1) and the shaft (2).
These hub and shaft can be turned separately. The num-
ber
of ports is the number of the fluid circuits. There are
grooves formed in the inner circumference surface of the
hub (1) and the outer circumference surface of the shaft (2).
The seals (4) are fitted above and below these circumfer-
ential
grooves. The oil flown from the port (3) continuously
flows through the hydraulic passage (5) between the hub
(1) and the shaft (2), making the circuit always open without
being blocked even when the upper structure is slewing.
To Next Page
Loading...
Need help?
General
