| 摘要 |
<p>A first aspect of the invention relates to a hydraulic pump unit (1) for feeding a hydraulic cab-tilting mechanism, comprising a casing (3) having at least two connecting ports (4,5) for the hydraulic cab-tilting mechanism, provided with a reservoir (6) for hydraulic fluid (7) and a hydraulic pump (8) which is connected to the reservoir and which can deliver hydraulic fluid to the connecting ports under working pressure required to operate the cab-tilting mechanism, a hydraulic circuit (9), fitted in the casing and connected to the connecting ports, the pump and the reservoir, and a hydraulic control valve (10) fitted in the hydraulic circuit, the hydraulic circuit further being provided with a mechanically-operable shut-off means (11), which, in the closed state, prevents the flow of hydraulic fluid under working pressure to the cab-tilting mechanism, which flow leads to operation of the cab-tilting mechanism. A second aspect of the invention relates to a hydraulic pump unit for feeding a hydraulic cab-tilting mechanism, comprising a casing having at leas t two connecting ports for the hydraulic cab-tilting mechanism, provid with a reservoir for hydraulic fluid and a hydraulic pump which is connected to the reservoir and which can deliver hydraulic fluid to the connecting g ports under working pressure required to operate the cab-tilting mechanism, a hydraulic circuit, fitted in the casing and connected to the connecting ports, the pump and the reservoir, and a hydraulic control valve fitted in the hydraulic circuit, the hydraulic circuit further being provided with a mechanic ally-operable shut-off means, which, in the closed state, prevents the flow of hydraulic fluid under working pressure to the cab-tilting mechanism, which flow leads to operation of the cab-tilting mechanism. A second aspect of the invention relates to a hydraulic pump unit for feeding a hydraulic cab-tilting mechanism, comprising a casing having a hydraulic pump, which is located in the casing and can be manually operated with a detachable pump lever, and a movable receiving member, located on the casing and connected to the pump, for receiving the pump lever, the receiving member being accompanied by a mechanical lock which can prevent the movement of the receiving member by s uring the receiving member relative to the casing.</p> |
