Title:
HYDRAULIC CIRCUIT OF BRAKE OF REVOLVING BODY
Document Type and Number:
Japanese Patent JPS5937362
Kind Code:
A
Abstract:
PURPOSE:To increase response to control, by effecting braking/release of brake, which is conducted by supply of pressure oil to a brake cylinder, and draining pressure oil in a brake cylinder through direct detection of the pressure in the main pipe of a hydraulic motor. CONSTITUTION:A sequence valve 32 and a shuttle valve 34 are mounted to a sequence valve part 30, main lines 20a and 20b of a hydraulic motor 2 are branched and connected to ports A and C, respectively, of the sequence valve 32, an output C of the shuttle valve 34 is connected to a center port B, and a port D, forming a flow-out side, is connected to a brake cylinder 3 of a hydraulic motor part 20. Further, the pilot pressure of the sequency valve 32 is directly introduced in the main lines 20a and 20b of the hydraulic motor 2, and thereby the sequence valve 32 directly senses the pressure of the main lines 20a and 20b to perform switching operation. This permits improvement of responsiveness of control of the brake of the hydraulic motor 2 and prevents the occurrence of a trouble such as heat-generation in a brake due to a delay in control.
Inventors:
TAKAMATSU TAKASHI
OONUKI TETSUO
OONUKI TETSUO
Application Number:
JP14639582A
Publication Date:
February 29, 1984
Filing Date:
August 24, 1982
Export Citation:
Assignee:
TOKYO KEIKI KK
International Classes:
F16H61/40; F16H61/4157; (IPC1-7): F16H39/44
Attorney, Agent or Firm:
Takeuchi Susumu