公开(公告)号：US4977732A

公开(公告)日：1990-12-18

申请号：US498951

申请日：1990-03-26

Applicant: William D. Minter

Inventor： William D. Minter

IPC: B62D12/00 ,  B62D49/06

CPC classification number: B62D12/00 ,  B62D49/0671 ,  Y10S56/10

Abstract: A powereed riding tractor lawn mower suited to uneven terrain has four fluid motor powered driven wheels and includes a frame comprising front and rear frame sections connected for pivoting about a first axis between the sections and normal to the ground plane. The rear frame section is in turn made up of forward and rearward portions, the rearward portion of which pivots about a second axis which intersects and is perpendicular to the first axis enabling the rear wheels to pivot about both axis. Sterring is accomplished by a steering mechanism which changes the angular relation of the frame sections.

Abstract translation: 适用于不平坦地形的电动骑马拖拉机割草机具有四个流体马达动力驱动的轮子，并且包括框架，该框架包括连接成围绕部分之间的第一轴线且垂直于接地平面的枢转的前部和后部框架部分。 后框架部分又由前部和后部组成，后部部分的后部围绕第二轴线枢转，该第二轴线与第一轴线相交并垂直于第一轴线，使得后轮能够绕两个轴线枢转。 换档是通过改变框架部分的角度关系的转向机构实现的。