Page 61 - Wire Rope News & Sling Technology - August 2019

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the lower traveling body 6. The engine 12 supplies power to hydraulic pump 14 is a variable displacement pump capable
the hydraulic pump 14 so as to cause
Sea Link Wooden Shell the hydraulic pump
of changing a discharge flow rate of the hydraulic oil dis-
Construction & Fishing Blocks charged by the hydraulic pump 14. Specifically, the hydrau-
14 to operate. The number-of-revolutions detecting section
lic pump 14 includes a swash plate 14a, a tilt angle of which
13 is configured to detect the number of revolutions of the
engine 12. The number-of-revolutions detecting section 13 can be changed. The tilt angle of the swash plate 14a chang-
is annexed to the engine 12. The number-of-revolutions de- es, whereby the displacement of the hydraulic pump 14
S Siinnggllees • Ds • Doouubblleess • • T Trriipplleess • • R Reegguullaar ar annd Hd Heeaavvy Wy Wooooddeen Bn Blloocckkss changes so that a flow rate of the hydraulic oil discharged by
tecting section 13 transmits data of the detected number of
revolutions to a main-body-side controller 82. the hydraulic pump 14 changes. Specifically, the discharge
The hydraulic pump 14 discharges hydraulic oil supplied flow rate of the hydraulic oil of the hydraulic pump 14 in-
to the hydraulic motors of the crawler devices 20, a swing creases as the tilt angle of the swash plate 14a increases.
motor 36 of the swing-body driving device 8, a steering mo- The discharge-flow-rate changing device 15 changes the tilt
tor of a steering device 55 of the carrier 4, and a wheel driv- angle of the swash plate 14a to thereby cause the hydraulic
ing motor 62 of the carrier 4. The power is supplied from pump 14 to change a discharge flow rate of the hydraulic oil.
the engine 12 to the hydraulic pump 14, whereby the hy- The discharge-flow-rate changing device 15 includes a tilt-an-
draulic pump 14 operates to discharge the hydraulic oil. The gle adjusting mechanism 15a and a tilt-angle-adjustment pro-
portional valve 15b. The tilt-angle adjusting mechanism 15a
is connected to the swash plate 14a of the hydraulic pump 14.
The tilt-angle adjusting mechanism 15a is a mechanism for
changing the tilt angle of the swash plate 14a. The tilt-angle
adjusting mechanism 15a adjusts the tilt angle of the swash
plate 14a according to the magnitude of a supplied hydrau-
lic pressure. Specifically, the tilt-angle adjusting mechanism
15a reduces the tilt angle of the swash plate 14a according to
All Material Factory Certified an increase in the supplied hydraulic pressure.
Wooden Shell Blocks 3” to 16” The tilt-angle-adjustment proportional valve 15b is a pro-
portional solenoid valve that adjusts a hydraulic pressure
For more Associated Wire Rope & Rigging, Inc. Waterman Supply Co., Inc. supplied to the tilt-angle adjusting mechanism 15a in order
information, 8125 Saran Drive, Playa Del Rey, CA 90293 910 Mahar Ave., Wilmington, CA 90748 to cause the tilt-angle adjusting mechanism 15a to adjust
contact: Ph: 1-800-901-1135 Fax: 310-448-5446 Ph: 1-800-322-3131 Fax: 310-522-1043 the tilt angle of the swash plate 14a of the hydraulic pump
Email: awrrinc@earthlink.net Figure 3:. Schematic side view of the mobile crane and 14. The tilt-angle-adjustment proportional valve 15b is pro-
Email: waterman@bigplanet.com a diagram
showing a state in which the counterweight carrier is in an vided in a supply route for a hydraulic pressure between the
uncoupled state. continued on next page
Wire Rope News & Sling Technology August 2006 37 Wire Rope News & Sling Technology August 2019 61