-
公开(公告)号：EP2565076A4
公开(公告)日：2017-11-29
申请号：EP11774743
申请日：2011-03-29
CPC分类号： B60P1/162 , F15B11/042 , F15B11/044 , F15B2211/3116 , F15B2211/351 , F15B2211/353 , F15B2211/6313 , F15B2211/6336 , F15B2211/665 , F15B2211/7107 , F15B2211/755 , F15B2211/853 , Y10T137/0971
摘要： A control valve device (16) comprises two direction control valves (20) and (21). The direction control valve (20) includes an expansion side variable throttle portion (20C) and a contraction side variable throttle portion (20D). The direction control valve (21) includes an expansion side variable throttle portion (21C) and a contraction side variable throttle portion (21D). When a hoist cylinder (10) is telescopically operated to raise or lower a vessel (3), as the hoist cylinder (10) approaches a stop position, a controller (35) determines that the hoist cylinder (10) gets close to the stop position. Based upon this determination, the controller (35) variably adjusts a flow passage area of the direction control valve (20) using the variable throttle portions (20C) and (20D) or variably adjusts a flow passage area of the direction control valve (21) using the variable throttle portions (21C) and (21D) in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder (10) corresponding to the weight in the side of vessel (3).
-
公开(公告)号：EP2594426A4
公开(公告)日：2018-01-10
申请号：EP11806550
申请日：2011-05-19
CPC分类号： B60K11/00 , B60K1/00 , B60L7/06 , B60L7/22 , B60L11/08 , B60L2200/40 , B60L2250/00 , Y02T10/648 , Y02T10/70 , Y02T10/7077 , Y10S903/902
摘要： Wheel drive motors (8) constituted of electric motors for driving rear wheels (7) are provided on a vehicle body (2) of a dump truck (1). Each wheel drive motor (8) is connected to a main power generator (12) through a bidirectional converter (20) and the like and driven by power supplied from the main power generator (12). A resistor (21) that consumes regenerative power from each wheel drive motor (8) is connected to the bidirectional converter (20). Cooling air is supplied to the resistor (21) from a blower (24). Operations of a switch (23) of the resistor (21) and the blower (24) are controlled by a controller (28). A mode selecting switch (29) for selecting a heating mode (A), a blowing mode (B), and a heating and blowing mode (C) is connected to the controller (28).
-
公开(公告)号：EP2527198A4
公开(公告)日：2017-11-29
申请号：EP10843956
申请日：2010-12-09
CPC分类号： B60P1/162
摘要： In case a burden is discharged from a vessel (3), the vessel (3) is raised obliquely backward with respect to a vehicle body (2) by a hoist cylinder (10). However, when discharging work is stopped on the way, the vessel (3) is temporarily lowered to a position at which this sits on the vehicle body (2). When the vessel (3) lowers, a weight of the burden left loaded thereon acts on the hoist cylinder (10) as a load in addition to the weight of the vessel (3). A controller (35) determines whether the vessel (3) lowers in a burden loading state based on various detection signals. When the vessel (3) lowers in the burden loading state, switching of directional control valves (20) and (21) is controlled so as to decrease a contracting speed of the hoist cylinder (10), thereby prevent the vessel (3) from colliding against the vehicle body (2).
-
-
搜索结果
3 条记录 (耗时 0.008 秒)
