公开(公告)号：US10246148B2

公开(公告)日：2019-04-02

申请号：US15337118

申请日：2016-10-28

Applicant: PONSSE OYJ

Inventor： Kalle Einola ,  Pentti Hukkanen ,  Jorma Hyvönen ,  Jukka Hyvönen

IPC: B62D55/084 ,  B62D55/065 ,  B62D55/12 ,  B62D21/04 ,  B62D55/04 ,  A01G23/00

Abstract: A modular crawler-track unit for a forest machine has an engine, a chassis with a pivot bearing and a crawler-track frame. A sleeve shaft is attached to the crawler-track frame to support the crawler-track frame on the pivot bearing. A drive wheel is mounted in bearings in the crawler-track frame inside a circulation of a crawler mat. A support is arranged in the crawler-track frame inside the circulation to support a part of the crawler mat against the ground. A drive shaft is mounted in bearings in the crawler-track frame coaxially with the sleeve shaft to transmit power to the crawler-track unit. A shaft mounted in bearings on the crawler-track frame pivots the drive wheel to the crawler-track frame at a distance from the drive shaft. A power-transmission is fitted between the shaft and the drive shaft to transmit power from the drive shaft to the drive wheel.