Hydraulically driven working machine
AssigneeYanmar Co., Ltd.
InventorMasami Miyanishi
Life of this patent
Estimating the term…
Abstract
A pair of supported portions are provided in a bifurcated manner on the base end of the boom of a work machine. Operation oil hoses for an arm cylinder and operation oil hoses for a bucket cylinder are guided and piped into the boom from between both the supported portions. A hose guide hole is provided below each of the boom support portions so that operation oil hoses for the boom cylinder are inserted into the respective hose guide holes. At an intermediate portion of the rear surface of the boom, the operation oil hoses are taken out from the inside of the boom through a hose attachment plate and connected to respective external hoses connected to the arm cylinder. At a tip end of the boom, the operation oil hoses are pulled out from the inside of the boom through a rear side inclined surface of an angle rib.
Claims10
A structure of a work machine having a plurality of drive parts which are individually driven and controlled with hydraulic pressure, comprising:
- a base;
- a boom bracket horizontally rotatably mounted on the base;
- a boom serving as one of the drive parts, the boom being vertically rotatably attached on the boom bracket;
- a pivot pin vertically penetrating the base and the boom bracket so that the base and the boom bracket are tightened thereon while the base and boom bracket being horizontally rotatable with respect to each other;
- hydraulic actuators for driving the respective drive parts;
- a hose guide member fixed to an upper end portion of the pivot pin so that the hose guide member and the boom bracket can be integrally rotated horizontally with respect to the base, and
- operation oil hoses extended from the base for supplying operation oil to the hydraulic actuators, wherein the operation oil hoses are guided and piped to the inside of the boom via the hose guide member.
A structure of a work machine having a plurality of drive parts which are individually controlled and driven with hydraulic pressure, comprising:
- a base;
- a boom serving as one of the drive parts, the boom being pivoted at its base end on the base;
- an arm serving as one of the drive parts, the arm being pivoted on a tip end of the boom;
- a hydraulic actuator for driving the arm;
- an operation oil hose piped inside of the boom for supplying operation oil to the hydraulic actuator, and
- a pair of mutually oppositely located brackets for pivoting a base end of the hydraulic actuator, the pair of brackets being arranged on a rear surface of the boom, wherein the boom is provided on its rear surface between the brackets with a hose taking-out opening for pulling the operation oil hose from the inside of the boom to the outside through said pair of brackets.
A structure of a work machine having a plurality of drive parts which are individually controlled and driven with hydraulic pressure, comprising:
- a base;
- a boom serving as one of the drive parts, the boom being pivoted at its base end on the base, wherein the boom is bent at an intermediate portion thereof so as to be substantially doglegged, and wherein the boom has a rear surface between the bent portion and the tip end thereof, and a rear surface between the bent portion and the base end thereof;
- an arm serving as one of the drive parts, the arm being pivoted on a tip end of the boom;
- a hydraulic actuator for driving the arm;
- a first operation oil hose for supplying operation oil to the hydraulic actuator, the first operating oil hose being piped inside of the boom,
- a hose attachment plate arranged in the vicinity of the bent portion of the boom, wherein the first operation oil hose piped inside the boom penetrates through the hose attachment plate;
- an end portion connector of the first operation oil hose, the end portion connector being arranged on the external surface of the hose attachment plate, and
- a second operation oil hose connected to the hydraulic actuator, an end portion of the second operation oil hose connected to the hydraulic actuator being detachably connected to the end portion connector of the first operation oil hose piped inside of the boom, wherein the hose attachment plate is arranged in such a manner that an angle thereof formed with the rear surface of the boom between the bent portion and the tip end becomes substantially equal to another angle thereof formed with the rear surface of the boom between the bent portion and the base end.
A structure of a work machine having a plurality of drive parts which are individually controlled and driven with hydraulic pressure, comprising:
- a base;
- a boom serving as one of the drive parts, the boom being pivoted at its base end on the base;
- an angle rib fixed to a tip end of the boom, wherein a surface of the angle rib attached to a rear surface of the boom is extended toward the base end of the boom so as to form an extension portion, and
- an open hole communicating the inside and the outside of the boom, the open hole being formed on the extension portion.
A structure of a work machine having a plurality of drive parts which are individually controlled and driven with hydraulic pressure, comprising:
- a base;
- a boom serving as one of the drive parts, the boom being pivoted at its base end on the base;
- an arm serving as one of the drive parts, the arm being pivoted on a tip end of the boom;
- a work attachment serving as one of the drive parts, the work attachment being pivoted on a tip end of the arm;
- a hydraulic actuator for driving the work attachment;
- a first operation oil hose for supplying operation oil to the hydraulic actuator, the first operation oil hose being piped inside of the boom;
- an angle rib fixed to the tip end of the boom, wherein the angle rib is provided with an inclined surface from a tip end portion of the angle rib to a rear surface of the boom, and wherein the first operation oil hose piped inside of the boom penetrates the inclined surface;
- an end portion connector of the first operation oil hose being arranged on an external side of the inclined surface, and
- a second operation oil hose connected to the work attachment, wherein an end portion of the second operation oil hose connected to the work attachment is detachably connected to the end portion connector of the first operation oil hose piped inside of the boom.
A structure of a work machine having a plurality of drive parts which are individually controlled and driven with hydraulic pressure, comprising:
- a base;
- a boom serving as one of the drive parts, the boom being pivoted at its base end on the base;
- an arm serving as one of the drive parts, the arm being pivoted on a tip end of the boom;
- an arm fulcrum bracket fixed to the tip end portion of a main body of the boom for pivoting a base end of the arm, the arm fulcrum bracket including a main plate member, a reinforcement plate, the main plate member being joined to the tip end portion of the boom and projecting further than the tip end portion of the main body of the boom, the reinforcement plate being plastered on and contained within an interior surface of the projecting portion of the main plate member, so that the main plate member and the reinforcing plate constitute a pivoting portion for pivoting the base end of the arm.
Dependencies are inferred from the claim text.