TURN ANGLE DETECTOR DEVICE FOR UPPER PART TURNING CRAWLER DUMP
Document Type and Number:
Japanese Patent JP3664273
PROBLEM TO BE SOLVED: To prevent misoperation by providing a detection plate for detecting a turn angle of an upper part turn unit in the vicinity of the periphery of a center swivel joint, so as to easily confirm an operating direction of a running lever reverse to an advancing direction.
SOLUTION: A turn angle detector device 1 is provided with a lower part running unit 21 and a center swivel joint 29 connecting an upper part turn unit having a revoframe 33 turnably provided on the running unit. A detection plate 2 detecting a turn angle of the upper part turn unit 22 is provided in the vicinity of the periphery of this center swivel joint 29, a proximity switch 4 is provided in a plate 33b of a hole 33a in a turn center part of the revoframe 33. The proximity switch 4 is placed in a position 4b at a 0° turn angle of the upper part turn unit 22, the switch is placed in a position 4a at a 180° turn angle, the proximity switch 4 is operated not in non-working range C but in a working range B of the detection plate 2. In this way, an advancing direction coming to be reverse is known.
April 08, 2005
October 18, 1995
B62D55/06; B60P1/04; B60P1/30; B62D55/00; B60P1/04; (IPC1-7): B60P1/30; B60P1/04; B62D55/06