Title:
WINCH
Document Type and Number:
Japanese Patent JP3945382
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To ensure free-fall action at the time of a light load while preventing lowering in brake force, without causing a problem such as the generation of random winding and power loss.
SOLUTION: In addition to a main clutch switching a power transmission mode and a free-fall mode, an auxiliary clutch 59 is provided between a winch motor 32 and a planetary gear mechanism 33. While the main clutch 43 is in an off state, the auxiliary clutch 59 is turned on/off according to a operation stroke of a brake valve 51, thereby switching a low-speed free fall mode making a sun gear 34 of the planetary gear mechanism 33 free-fall at a low speed while restraining the sun gear 34 of the planetary gear mechanism 33, and a high-speed free-fall mode making the gear free-fall at a high speed while releasing the gear.
Inventors:
Yamagata Katsumi
Application Number:
JP2002328195A
Publication Date:
July 18, 2007
Filing Date:
November 12, 2002
Export Citation:
Assignee:
Kobelco Cranes Co., Ltd.
International Classes:
B66D1/16; B66D1/22; B66D1/44; (IPC1-7): B66D1/16; B66D1/22; B66D1/44
Domestic Patent References:
| JP2000016772A | ||||
| JP9100093A | ||||
| JP2002037588A | ||||
| JP7206384A | ||||
| JP2001270686A |
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Jiro Higuchi
Muramatsu Toshiro
Takao Ito
Jiro Higuchi
Muramatsu Toshiro
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