Kubota Patente

Provided is a working vehicle to lower the position of the center of gravity of the vehicle to improve the stability of the vehicle. A working vehicle (1) includes a vehicle body (2), a traveling device (3) to support the vehicle body (2) such that the vehicle body (2) is allowed to travel, a working device (200) to perform work. The working device (200) includes pieces of equipment (201) located at opposite sides of the vehicle body (2) from each other.

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To notify the proper temperature to a human operator based on temperature of the battery assembly detected by a plurality of temperature detectors. An electric working machine (1) includes a battery assembly (30), an electric actuator (9) to be actuated by electricity supplied by the battery assembly, a working device (20) to be actuated by the electric actuator being driven, a plurality of temperature detectors (31b, 31c, 31d, 32b, 32c, 32d) to each detect a temperature of the battery assembly, a controller (7) configured or programmed to calculate a first temperature (T_show) of the battery assembly based on temperatures detected by the plurality of temperature detectors, and a display (60) to display the first temperature calculated by the controller. The controller is configured or programmed to calculate the first temperature based on a lowest temperature (T_min) of the temperatures detected by the plurality of temperature detectors, a highest temperature (T_max) of the temperatures detected by the plurality of temperature detectors, and a weighting value to assign weights such that a weight assigned to the lowest temperature increases as the lowest temperature decreases.

To achieve, in an electric working machine, both shortening a charging time and holding down increases in the temperature of a battery according to the purpose of use. An electric working machine (1) includes a battery assembly (30), an electric actuator (9) to be actuated by electricity supplied by the battery assembly, a working device (20) to be actuated by the electric actuator being driven, a temperature detector (31b, 31c, 31d, 32b, 32c, 32d) to detect a temperature of the battery assembly, and a controller (7) configured or programmed to control, according to the temperature of the battery assembly, a first upper limit (I_th1) which is an upper limit of a charging current supplied to the battery assembly. The controller is configured or programmed to switch between (i) a first mode (M1) in which the controller controls the charging current based on a first correspondence relationship in which temperatures of the battery assembly and first upper limits are associated with each other, and (ii) a second mode (M2) in which the controller controls the charging current based on a second correspondence relationship in which the first upper limits are lower than in the first correspondence relationship at one or more of the temperatures.

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A battery is easily and firmly secured. A battery mount (50) includes a placement base (54), a restriction member (55) to restrict rearward movement of the battery (BT), the restriction member (55) being provided at the same side of the battery (BT) as a rear surface of the battery (BT), and a securing assembly (53) to secure the battery (BT), the securing assembly (53) extending from a position above the restriction member (55) or from an upper portion of the restriction member (55) to a forward surface of the battery (BT). The securing assembly (53) includes a first securer (53a) provided at the same side of the battery (BT) as an upper surface of the battery (BT), a second securer (53b) provided at the same side of the battery (BT) as the forward surface of the battery (BT), and a coupler (90) to couple the first securer (53a) and the second securer (53b) to each other. The coupler (90) includes an inclined portion (63) provided in one of the first securer (53a) and the second securer (53b), the inclined portion (63) being inclined in an inclination direction such that a distance between the inclined portion (63) and the rear surface of the battery (BT) decreases in an upward direction, and a retention member (52) to retain a position at which the other of the first securer (53a) and the second securer (53b) is coupled to the inclined portion (63) such that the position relative to the inclined portion (63) is adjustable.

The safety in an operation using an attachment to hold a to-be-held object is improved. A working machine (1) includes a machine body (2), a working device (20) provided on the machine body (2) to attach thereto an attachment (100) to hold a to-be-held object, and a controller (51) to impose an operational limitation to limit one or both of an operational area and an operational speed of the working machine (1) when causing the attachment (100) to perform an operation of holding the to-be-held object.

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Provided is a working machine capable of appropriately setting a holding position at which a to-be-held object is to be held and reducing variations in the operation of holding the to-be-held object. A working machine (1) includes a machine body (2), a working device (20) provided on the machine body (2), an attachment (100) provided on the working device (20) to hold an elongated to-be-held object (W), a first sensor (81) to recognize a position of one end portion (W1b) of the to-be-held object (W), a setter (57) to set a holding position (PG) based on a recognition result from the first sensor (81), the holding position (PG) being a position at which the to-be-held object (W) is to be held by the attachment (100), a controller (51) to control the working device (20). The controller (51) is configured or programmed to control the working device (20) to allow the attachment (100) to hold the to-be-held object (W) at the holding position (PG) set by the setter (57).

A ridable mower machine includes: a mower (7); a grass collecting container (9) configured to collect cut grass from the mower; a linkage mechanism (10) that includes a plurality of linkage members (21, 22), and supports the grass collecting container such that the grass collecting container can be lifted and lowered, and opened and closed; a hydraulic actuator configured to drive the grass collecting container; a hydraulic hose that is provided along a linkage member and is connected to the hydraulic actuator; and a cover (3)1 that covers a portion that extends along the linkage member, of the hydraulic hose.

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The present invention easily reduces the influence of air entrainment in hydraulic fluid in fluid chambers (E1, E2, DE) on a hydraulic device (C). A hydraulic system (S) for a working machine (1) includes: a hydraulic pump (P); a hydraulic device to be actuated by hydraulic fluid delivered by the hydraulic pump to drive the working machine; a solenoid proportional valve (SV) to adjust a flow rate and/or a pressure of hydraulic fluid supplied from the hydraulic pump to the hydraulic device; and a controller (70) configured or programmed to control the solenoid proportional valve. The solenoid proportional valve includes: a housing (80); a spool (83) housed in the housing; a coil (85) to be controlled by the controller, and a moving portion (87) to be caused by a magnetic flux generated by the coil to move the spool. The housing includes a fluid chamber to store hydraulic fluid, the fluid chamber having a volume that changes with movement of the spool. The controller is configured or programmed to include an air-bleeding mode in which the controller controls the coil to cause the moving portion to reciprocate a plurality of times in an axial direction of the spool.

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Provided is a highly convenient independent water use system (101 to 106). The independent water use system (101 to 106) is for water use for one or more specific water demand facilities (20, 20a, 20b, 40, 40a to 40d), and includes a clean water generator (10), a clean water pipe (11a to 11d, 11) to allow clean water generated by the clean water generator (10) to flow to the clean water demand facility (20, 20a, 20b), a first drainage water pipe (21a, 21c, 21d) to allow first drainage water, resulting from usage of the clean water in the clean water demand facility (20, 20a, 20b), to flow therethrough; a purifier (30, 30x, 30y) connected to the first drain pipe (21a, 21c, 21d) to purify the first drainage water, and a recycled water pipe (31a to 3 If, 31) to allow recycled water obtained by purification of the first drainage water by the purifier (30, 30x, 30y) to flow to recycled water demand facility (40, 40a to 40d).

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