GB1371839A - Free fall circuit for hydraulic winch - Google Patents

Free fall circuit for hydraulic winch

Info

Publication number
GB1371839A
GB1371839A GB4908872A GB4908872A GB1371839A GB 1371839 A GB1371839 A GB 1371839A GB 4908872 A GB4908872 A GB 4908872A GB 4908872 A GB4908872 A GB 4908872A GB 1371839 A GB1371839 A GB 1371839A
Authority
GB
United Kingdom
Prior art keywords
valve
free fall
lines
clutch
winch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4908872A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ruston-Bucyrus Ltd
Original Assignee
Ruston-Bucyrus Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ruston-Bucyrus Ltd filed Critical Ruston-Bucyrus Ltd
Publication of GB1371839A publication Critical patent/GB1371839A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/08—Driving gear incorporating fluid motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0125—Motor operated winches
    • B66D2700/0133—Fluid actuated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/905—Winding and reeling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1371839 Controlling winches RUSTONBUCYRUS Ltd 25 Oct 1972 [26 Oct 1971] 49088/72 Heading B8B [Also in Division F2] A free fall operating circuit for an hydraulic winch includes a normally engaged hydraulically releasable free fall clutch 7 and a sensing valve 16 operable to de-activate the clutch release means in response to a pressure differential between the pressure and return lines 11, 12 for the winch motor 1, whereby free fall is prevented whilst the winch drum 2 is being powered in either direction. The clutch 7 is releasable for winch free fall by either manual selection or a lockout valve 15 whereby fluid is supplied from a pump 14 through line 17, sensing valve 16 and line 18, the valve 16 permitting the fluid to pass from line 17 to 18 only when in its neutral position. The valve 16 is operated by pilot pressure lines 25, 26 coupling the motor lines 11, 12 to opposite ends of the valve 16 and any difference in pressure between the lines 11, 12 causes the valve 16 to be displaced from its neutral position and exhaust the lines 17 and 18 the free fall condition of the winch only being selectable therefore when a hoist direction control valve 9 is in its neutral position. To prevent re-engagement of the clutch 7 during free fall movement, which is manually controlled by a foot brake, a solenoid operated safety valve 30 is inserted in the pilot lines 25, 26 and is controlled in response to the speed of the drum 2 and the pressure in the line 18 whereby the clutch 7 cannot be re-engaged due to a pressure differential in the lines 11, 12 while a free fall condition exists since the sensing valve 16 is isolated from the lines 11, 12 by the closed valve 30. A dashpot valve 33 restricts the fluid flow from the clutch operating ram to cushion the effect of reengagement of the clutch due to a power failure. The valve 15 is interlocked with the overall start circuit for the winch so that the winch circuit can only be completed when the valve 15 is in the "off'' position and the free fall condition is not existing. A self sustaining clutch brake arrangement is interposed between the motor and the drum.
GB4908872A 1971-10-26 1972-10-25 Free fall circuit for hydraulic winch Expired GB1371839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19209771A 1971-10-26 1971-10-26

Publications (1)

Publication Number Publication Date
GB1371839A true GB1371839A (en) 1974-10-30

Family

ID=22708234

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4908872A Expired GB1371839A (en) 1971-10-26 1972-10-25 Free fall circuit for hydraulic winch

Country Status (4)

Country Link
US (1) US3764111A (en)
JP (1) JPS5218974B2 (en)
CA (1) CA956924A (en)
GB (1) GB1371839A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482936A1 (en) * 1980-05-26 1981-11-27 Komatsu Mfg Co Ltd CLUTCH AND BRAKE CONTROL DEVICE FOR HYDRAULICALLY DRIVEN CRANE WINCHES
EP0085906A2 (en) * 1982-01-28 1983-08-17 Hitachi Construction Machinery Co., Ltd. Operation system for hoisting device
CN109132909A (en) * 2018-10-10 2019-01-04 三汽车起重机械有限公司 winding hydraulic control system and crane

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240940C3 (en) * 1972-08-19 1975-11-06 O & K Orenstein & Koppel Ag Werk Luebeck, 2400 Luebeck Hydrostatic transmission, especially for winches, hoisting winches, luffing winches or the like
JPS574597B2 (en) * 1974-03-04 1982-01-26
US4398698A (en) * 1981-05-29 1983-08-16 Fmc Corporation Freefall winch system and method of operation
US4516755A (en) * 1982-06-02 1985-05-14 Kabushiki Kaisha Komatsu Seisakusho Hydraulic winch control system
JP3508662B2 (en) * 1998-12-25 2004-03-22 コベルコ建機株式会社 Hydraulic drive winch control method and device
CN102336372A (en) * 2010-07-16 2012-02-01 徐州重型机械有限公司 Hydraulic control system of crane and winch device of crane
CN103723645B (en) * 2014-01-20 2016-09-21 安徽柳工起重机有限公司 Quick release winch control system of dynamic compactor
US10947094B2 (en) * 2019-08-05 2021-03-16 Goodrich Corporation Auxiliary brake assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258307A (en) * 1938-11-18 1941-10-07 Vickers Inc Power transmission
US3249336A (en) * 1963-06-18 1966-05-03 Baldwin Lima Hamilton Corp Hydraulic winch control mechanism
US3550735A (en) * 1968-09-23 1970-12-29 Hyster Co Fluid pressure reversing clutches and brake for winch
US3578787A (en) * 1968-11-12 1971-05-18 Northwest Engineering Corp Control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482936A1 (en) * 1980-05-26 1981-11-27 Komatsu Mfg Co Ltd CLUTCH AND BRAKE CONTROL DEVICE FOR HYDRAULICALLY DRIVEN CRANE WINCHES
EP0085906A2 (en) * 1982-01-28 1983-08-17 Hitachi Construction Machinery Co., Ltd. Operation system for hoisting device
EP0085906A3 (en) * 1982-01-28 1983-12-14 Hitachi Construction Machinery Co., Ltd. Operation system for hoisting device
CN109132909A (en) * 2018-10-10 2019-01-04 三汽车起重机械有限公司 winding hydraulic control system and crane
CN109132909B (en) * 2018-10-10 2021-02-05 三一汽车起重机械有限公司 Winch hydraulic control system and crane

Also Published As

Publication number Publication date
US3764111A (en) 1973-10-09
JPS4862151A (en) 1973-08-30
CA956924A (en) 1974-10-29
JPS5218974B2 (en) 1977-05-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee