Title:
HEIGHT ADJUSTMENT DEVICE FOR CRAWLER TRACTOR
Document Type and Number:
Japanese Patent JP3273987
Kind Code:
B2
Abstract:
PURPOSE: To enable a body having a high gravity center position to be stably supported by expanding the span of crawler travel devices according to an increase in the height of the body relative to the ground, regarding a crawler tractor having a height adjustment device.
CONSTITUTION: The drive wheels of a crawler tractor are fitted to a body, and a group of guide wheels and idlers 3 is mounted on a truck frame 4. This frame 4 is jointed to the body via a support arm 6 vertically oscillating about the center of a support shaft 5. The height of the body relative to the ground is adjusted via the vertical motion of the truck frame 4 on the oscillation of the support arm 4. Regarding a crawler tractor so constructed, the support shaft 5 as the oscillation center of the support arm 6 is laid in such a way as inclined down inward. Also, the drive wheels fitted to the body are so constituted as to be capable of shifting along the axial center of an axle, interlocked with the oscillation of the support arm 6.
Inventors:
Shoichi Sato
Hiroaki Sumida
Hiroaki Sumida
Application Number:
JP5486193A
Publication Date:
April 15, 2002
Filing Date:
February 19, 1993
Export Citation:
Assignee:
Seirei Industry Co., Ltd.
International Classes:
B62D55/084; B62D55/10; B62D55/116; (IPC1-7): B62D55/116; B62D55/084; B62D55/10
Domestic Patent References:
| JP396489A | ||||
| JP486592U | ||||
| JP1144181U | ||||
| JP5118269U |