| 摘要 |
PROBLEM TO BE SOLVED: To improve the steerability and steering performance of a traveling device so that steering is easy to an unskilled operator, and safety is high. SOLUTION: This traveling device is provided with a control means capable of arbitrarily changing the initial number of revolution of a swash plate of a pump 71 of a turning HTS 70 when the turning of a power steering lever 55 is started. The control means controls the optimum initial number of revolution of the turning HST 70 by the detected output such as vehicle speed, weight, and settlement of the traveling device body. For example, when vehicle speed is low, the weight is small, and the settlement is small, the initial number of revolution is set to 'fast' to control the differential speed between crawlers to be small when turning is started, and to reduce the impact by starting turning. When vehicle speed is high, the weight is large, and the settlement is large, the initial number of revolution is set to 'slow' to increase differential speed between the crawlers when turning is started, and to facilitate steering operation even in a case difficult to turn, i.e., when the vehicle speed is large, the weight is large, and the settlement is large.
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