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    CONSTRUCTION MACHINE
    1.
    发明公开
    CONSTRUCTION MACHINE 审中-实审

    公开(公告)号：EP4403706A2

    公开(公告)日：2024-07-24

    申请号：EP23216939.1

    申请日：2023-12-14

    申请人： Yanmar Holdings Co., Ltd.

    发明人： WAKATA, Tatsumasa ,  TAKEDA, Kazuki ,  NORIMOTO, Seiya

    IPC分类号： E02F9/08

    CPC分类号： E02F9/2275 ,  E02F9/0883 ,  E02F9/2225 ,  E02F9/2267 ,  E02F9/0891 ,  E02F9/2012

    摘要： [Problem] To provide a construction machine capable of easily visually recognizing a level gauge of a hydraulic oil tank even from a driver's seat side, easily checking an oil amount in the hydraulic oil tank, and obtaining good workability, and a construction machine capable of obtaining good maintainability for a functional component such as a plurality of hydraulic hoses extending from a control valve and a fuel supply pump provided in a tank chamber.
    [Solution] An excavation work machine includes a hydraulic oil tank 15 provided in a tank chamber 20 and storing hydraulic oil that actuates a plurality of hydraulic actuators, a driver's seat provided on a lateral side of the tank chamber 20, a level gauge 70 that is provided on the driver's seat side of the tank chamber 20 and indicates an amount of the hydraulic oil in the hydraulic oil tank 15, a control valve 60 controlling a flow of pressure oil supplied from the hydraulic oil tank 15 to each of the hydraulic actuators, a plurality of hydraulic hoses 330 extending from the control valve 60 and communicatively connected to each of the hydraulic actuators, and a fuel tank 14 that is provided in a front portion in the tank chamber covered with a hood provided to be openable and closable and stores fuel to be supplied to an engine. The plurality of hydraulic hoses 330 are arranged along a rear surface portion 15b of the hydraulic oil tank 15, the fuel tank 14 has a step portion 110 in a front portion, and a fuel supply pump 120 is provided in a space portion 111 formed above the step portion 110 in the tank chamber.

    DRIVING STRAIGHT AHEAD DEVICE FOR CONSTRUCTION MACHINE AND CONTROL METHOD THEREFOR
    5.
    发明公开
    DRIVING STRAIGHT AHEAD DEVICE FOR CONSTRUCTION MACHINE AND CONTROL METHOD THEREFOR 审中-公开
    驱动施工机械的前向装置及其控制方法

    公开(公告)号：EP3216927A1

    公开(公告)日：2017-09-13

    申请号：EP14905308.4

    申请日：2014-11-05

    申请人： Volvo Construction Equipment AB

    发明人： JOUNG, Hea-Gyoon ,  KIM, Sung-Gon

    IPC分类号： E02F9/02

    CPC分类号： E02F9/2004 ,  E02F9/02 ,  E02F9/2037 ,  E02F9/2045 ,  E02F9/2225 ,  E02F9/2239 ,  E02F9/2242 ,  E02F9/225 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17

    摘要： Disclosed are a straight traveling apparatus for a construction machine and a control method thereof, which can allow a curved travel when the working device is operated during the curved travel. The straight traveling apparatus comprises a first and a second variable displacement hydraulic pump and a pilot pump; a left travel motor and a first working device that are operated by the first hydraulic pump; a plurality of switch valve that are installed in the path of the first hydraulic pump and control the hydraulic oil supplied to the left travel motor or the first working device; a right travel motor and a second working device that are operated by the second hydraulic pump; a plurality of switch valve that are installed in the path of the second hydraulic pump and control the hydraulic oil supplied to the right travel motor or the second working device; a straight travel valve that is switched by the pilot pressure applied from an electrical control valve, and supplies the hydraulic oil of one of the first and second hydraulic pumps to the left and right travel motors while supplying the hydraulic oil of the other of the first and second hydraulic pumps to the left and right working devices; a pressure detection sensor for detecting the pilot pressure applied to the left and right travel motor switch valves and the pilot pressure applied to the first and second working device switch valves; and a controller that outputs the control signal to the electrical control valve so that the pilot pressure applied to the straight travel valve is blocked in case that the difference between the pilot pressures applied to the left and right travel motor switch valves is larger than the pre-set pressure value, when the first and second working devices are operated during the travel.

    摘要翻译： 公开了一种用于施工机械的直行装置及其控制方法，其能够在弯曲行驶期间操作作业装置时允许弯曲行进。 直行装置包括第一和第二可变排量液压泵以及先导泵; 由第一液压泵操作的左行走马达和第一作业装置; 多个开关阀，所述开关阀安装在所述第一液压泵的路径中并且控制供应到所述左行驶马达或所述第一作业装置的液压油; 由第二液压泵操作的右行走马达和第二工作装置; 多个开关阀，其安装在第二液压泵的路径中并且控制供应到右行进马达或第二工作装置的液压油; 直行阀，其通过从电动控制阀施加的先导压力进行切换，并且将第一和第二液压泵中的一个的液压油供应​​到左和右行走马达，同时供应第一和第二液压泵中的另一个的液压油 第二液压泵连接到左和右工作装置; 压力检测传感器，用于检测施加到左右行驶马达转换阀的先导压力和施加到第一和第二作业装置转换阀的先导压力; 以及控制器，该控制器将控制信号输出到电控阀，以使得施加到直行阀的先导压力在施加到左行进马达切换阀和右行进马达切换阀的先导压力之间的差大于预先设定的阈值 - 当在行驶期间操作第一和第二工作装置时设定的压力值。

    HYDRAULIC BRAKE
    9.
    发明公开
    HYDRAULIC BRAKE 审中-公开
    液压制动

    公开(公告)号：EP3068951A1

    公开(公告)日：2016-09-21

    申请号：EP14806143.5

    申请日：2014-11-12

    申请人： Clark Equipment Company

    发明人： LACHER, Robert R.

    IPC分类号： E02F9/12 ,  E02F9/22 ,  F16H61/4157 ,  F15B11/044 ,  F16D57/06

    CPC分类号： E02F9/128 ,  E02F9/2203 ,  E02F9/2225 ,  E02F9/226 ,  F16H61/4157

    摘要： A hydraulic brake mechanism (145; 245; 345) for use in hydraulic systems (200; 300) to provide braking of a hydraulic motor (150; 250; 350) is disclosed. The brake mechanism provides proper braking under a range of operating conditions, including (1) the start of flow from the pump (205; 305) to the brake and motor and braking is not desired; (2) operating conditions in which constant flow is provided from the pump to the brake and motor and braking is not desired; (3) operating conditions in which abrupt decreases of flow from the pump to the brake and the motor occur, for example where flow is reduced due to being drawn by another work element (325) or hydraulic load, but under which a reduced supply flow is still present and braking is not desired; and (4) operating conditions in which the hydraulic flow from the pump to the brake mechanism and the motor is shut off completely and braking is desired.