Title:
SPEED REDUCTION GEAR KICK-DOWN DEVICE IN CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JPS61244954
Kind Code:
A
Abstract:
PURPOSE:To shift down the speed reduction gear to improve the operation ability of a construction machine during working, by connecting a forward movement solenoid in parallel with a series circuit of an accelerator switch, working operation switches and a relay having contacts between a gear shift switch and gear shift solenoids. CONSTITUTION:A series circuit of a kick-off switch 11 which turns on upon depression of an accelerator, a deceleration permission switch 13 which turns on upon operation of a control lever of a working machine, and a relay 4 is connected in parallel with a forward movement solenoid 8. Further, contacts 41, 42 are disposed between first and second solenoids 3, 5 and a gear shift switch 1. In this arrangement, when the working machine control lever is operated to turn on the deceleration permission switch 3, a relay 4 is energized to close the contact 41 so that a second gear stage solenoid is denergized, and therefore, a first stage solenoid is energized to kick down the speed reduction gear. Accordingly, it is possible to automatically increase the power of the construction machine during the working operation of the machine to a value higher than that during running of the machine, so that it is possible to improve the operation ability of the machine thereby it is possible to alleviate the operator's fatigue.
More Like This:
Inventors:
KUSAKA KOHEI
KODERA MIKIO
KODERA MIKIO
Application Number:
JP8533985A
Publication Date:
October 31, 1986
Filing Date:
April 23, 1985
Export Citation:
Assignee:
KOMATSU MFG CO LTD
International Classes:
F16H61/02; F16H59/04; (IPC1-7): F16H5/66
Attorney, Agent or Firm:
Yonehara Masaaki