Transaxle System For Vehicle

摘要

Transaxle systems for a vehicle are disclosed where each of right and left transaxle units includes a hydraulic pump, a hydraulic motor and a casing incorporating the hydraulic pump and motor. Each hydraulic pump has a pump displacement control means operatively connected to a pump control arm pivoted on the casing, and each hydraulic motor has a motor displacement control means operatively connected to a motor control arm pivoted on the casing. A single motor controlling manipulator is operatively connected to the motor control arms to simultaneously shift the motor displacement control means of the right and left transaxle units between large displacement positions and small displacement positions.

主权项

1. A transaxle system for a vehicle comprising:
right and left axles drivingly connected to respective right and left drive wheels of the vehicle; right and left transaxle units mounted in the vehicle so as to drive the respective right and left axles, each of the right and left transaxle units including a variable displacement hydraulic motor for driving the corresponding right or left axle, a variable displacement hydraulic pump for supplying fluid to the corresponding hydraulic motor, and a transaxle casing supporting the corresponding right or left axle and incorporating the corresponding hydraulic pump and the corresponding hydraulic motor, wherein the right and left axles project distally in the lateral direction of the vehicle from the respective transaxle casings of the right and left transaxle units, wherein the hydraulic motor of each of the right and left transaxle units is provided with a motor displacement control means that is shiftable between a large displacement position and a small displacement position, whereby the motor displacement control means of the respective right and left transaxle units are operatively connected to respective motor control arms pivoted on outsides of the respective transaxle casings, and wherein the hydraulic pump of each of the right and left transaxle units is provided with a pump displacement control means that is shiftable to change fluid delivery amount and direction of the corresponding hydraulic pump, whereby the pump displacement control means of the respective right and left transaxle units are operatively connected to respective pump control arms pivoted on outsides of the respective transaxle casings; a single motor controlling manipulator provided in the vehicle and operatively connected to both the motor control arms so that the motor controlling manipulator is manipulable to simultaneously rotate both the motor control arms so as to simultaneously shift both the motor displacement control means; and right and left pump controlling manipulators provided in the vehicle and operatively connected to the respective pump control arms so that the right and left pump controlling manipulators are, manipulable to individually rotate the respective pump control arms so as to individually shift the respective pump displacement control means.