| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To achieve a hydraulic traveling brake and a hydraulic parking brake with a small installation space and a simple configuration, and to reduce load to a power source by the supply of liquid pressure. <P>SOLUTION: A hydraulic brake circuit 5 for receiving the supply of hydraulic liquid from a hydraulic pump 1 to be a hydraulic liquid supply source and supplying the hydraulic liquid to the traveling brake 2 and the parking brake 3 is configured to adopt a common hydraulic liquid supply path 51 which supplies the hydraulic liquid to the traveling brake 2 and the parking brake 3, a liquid pressure sensor 52 for detecting the liquid pressure inside the common hydraulic liquid supply path 51, and a switching valve 53 which is switchable to an ON state to be a first state for connecting the hydraulic pump 1 with the common hydraulic liquid supply path 51 to hold the liquid pressure above a predetermined value and an OFF state to be a second state for flowing back the hydraulic liquid from the hydraulic pump 1 in a no load state, based on the liquid pressure detected by the liquid pressure sensor 52. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
