Travel vehicle

Abstract

A travel vehicle, such as a combine, capable of being operated (maneuvered) as conveniently as four-wheeled automobiles, wherein the travel vehicle has a simplified mechanism for interlockingly connecting a rectilinear movement operating device (13) and a turn movement operating device (10) to transmissions (53, 54) respectively for rectilinear movement and for turn movement. A single controllingbody (131) pivotable about both a pivot axis P and a shift axis S which are perpendicular to each other are incorporated in a containing box (120). The controlling body (131) is adapted so as to pivot about the pivot axis P by operation of the turn movement operating device (10) and so as to pivot about the shift axis S by operation of the rectilinear movement operating device (13). A converting shaft (164) for turn movement and a converting shaft (155) for rectilinear movement are pivotably supported in the containing box (120) such that the axes of the shafts are located on substantially the same plane. The containing box (120) is mounted on the lower surface side of a step floor member (111), which forms the floor surface of an operating section (9), so as to be positioned near both the transmissions (53, 54) located between left and right travel sections (2).

Description

technical field [0001] The present invention relates to traveling vehicles of agricultural machines such as combine harvesters and special working machines such as cranes. Background technique [0002] Conventionally, a combine harvester as a traveling vehicle has a configuration in which power from an engine mounted on a traveling body is transmitted to left and right traveling crawlers via a straight transmission, a turning transmission, and a differential mechanism. [0003] One example of the combine harvester of such a structure is disclosed by patent document 1. In the combine harvester of patent document 1, the drive output amount of the transmission for straight travel, that is, the straight travel speed of a traveling body is adjusted by the tilt operation amount of the main gear lever provided in the control part. If the main gear lever is in the neutral position, the traveling body does not go straight. In addition, the driving output amount of the turning trans...

AI Technical Summary

Problems solved by technology

[0006] However, in the combine harvester of Patent Document 1, the mechanical linkage mechanism has many long rods, arms, pivot pins, etc., and is a rather complicated structure. Therefore, there is a problem that the cost of parts required for the mechanical linkage mechanism increases. , not commensurate with the strong cost reduction requests in recent years

In addition, the mechanical linkage mechanism with a complex structure is arranged in the steering column in front of the operating seat, so the space around the operating seat is narrow. In view of the comfort of the combine harvester, there is room for improvement

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