Title:
BRAKING DEVICE FOR HYDRAULIC MOTOR
Document Type and Number:
Japanese Patent JPS6141663
Kind Code:
A
Abstract:
PURPOSE:To keep off a shock due to too much effectiveness in a brake, by making an extent of braking force commensurate to a speed variation so as to act on in time of deceleration in a running motor. CONSTITUTION:When a feeding quantity from a hydraulic pump P to a running motor M is throttled by a directional control valve V, additional rotational frequency of the running motor M drops to some extent. At this time, with inertial force acting on the running motor M, pressure in a feed-discharge circuit 1a drops whereby pressure in both feed-discharge circuits 1a and 1b becomes identical with each other so that a selector valve K is selected to a neutral position, thus pressure oil in a pressure oil chamber UA is discharged to a tank T and braking force gets operating. On the other hand, after rotational frequency of the running motor M has dropped, drive of the running motor M by pressure oil out of the pump P is reopened, and the selector valve K is selected to a selecting position K3 so that braking force of braking devices B and B is released.
Inventors:
YASUI MASARU
YAMAGUCHI HITOSHI
KISHIMOTO TOSHIYA
TSUNEMI MASAHIRO
YAMAGUCHI HITOSHI
KISHIMOTO TOSHIYA
TSUNEMI MASAHIRO
Application Number:
JP16408484A
Publication Date:
February 28, 1986
Filing Date:
August 03, 1984
Export Citation:
Assignee:
NIPPON AIR BRAKE CO
International Classes:
B60T13/22; F16D55/40; (IPC1-7): F16D55/40
Domestic Patent References:
| JPS5143658A | 1976-04-14 |
Attorney, Agent or Firm:
Satoshi Shimizu