JPS592779U

JPS592779U - Hydraulic drive winch control device

Info

Publication number: JPS592779U
Application number: JP9652282U
Authority: JP
Inventors: 富田　晋二
Original assignee: 株式会社小松製作所
Priority date: 1982-06-29
Filing date: 1982-06-29
Publication date: 1984-01-09

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来例の説明図、第２図は本考案の実施例を示
す全体構成説明図、第３図はブレーキシリンダの断面図
、第４図は制動トルクと踏み込みストロークとの関係を
示す表口である。Ａは可変減圧弁、Ｂはブレーキシリンダ、２０は油圧モ
ータ、２４はウィンチドラム、３４はブレーキ、３８は
操作部材、６０，６１．６４は第１、第２、第３受圧室
、６５はバネ、７３は出口ポート、８０は切換弁。Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an explanatory diagram of the overall configuration showing an embodiment of the present invention, Fig. 3 is a sectional view of a brake cylinder, and Fig. 4 shows the relationship between braking torque and depression stroke. It is the front door. A is a variable pressure reducing valve, B is a brake cylinder, 20 is a hydraulic motor, 24 is a winch drum, 34 is a brake, 38 is an operating member, 60, 61, 64 are first, second and third pressure receiving chambers, 65 is a spring , 73 is an outlet port, and 80 is a switching valve.

Claims

[Claims for Utility Model Registration] In a hydraulically driven winch equipped with a winch drum 24 driven by a hydraulic motor 20, the winch drum 24
is provided with a brake 34, the brake 34 is connected to an operating member 38 via a link mechanism, and the link mechanism is provided with a variable pressure reducing valve A that discharges pressure oil proportional to the amount of operation,
A brake cylinder B is provided for braking the link mechanism, and the brake cylinder B is connected to the first and second pressure receiving chambers 60°61.
The structure includes a piston rod 63 that is moved in the braking direction by pressure oil in the third pressure receiving chamber 64 and a spring 65, and a piston rod 63 that is moved against the spring 65 by pressure oil in the third pressure receiving chamber 64. A third pressure receiving chamber 64 is connected to a hydraulic power source to the outlet port 73 of the variable pressure reducing valve A, and a second pressure receiving chamber 61 is connected to a hydraulic power source via a switching valve 80, and the switching valve 80 is connected to a hydraulic pressure source. motor . A control device for a hydraulically driven winch, characterized in that the winch is in a drain position when the winch is being driven, and is in a communicating position when it is stopped.