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
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