Upper slewing body for construction machine

Patent metadata

Field	Value
Publication number	US-9422691-B2
Application number	US-201514658827-A
Country	US
Kind code	B2
Filing date	Mar 16, 2015
Priority date	Mar 20, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

Provided is an upper slewing body allowing elements to be compactly arranged while preventing required length of a hydraulic pipe from increase. The upper slewing body includes an upper frame, an engine, a hydraulic pump coupled thereto, a control valve forward of the engine and rearward of a slewing axis, and a rear tank between the engine and the control valve. The control valve is oblique to a frame lateral direction so as to locate a front end portion thereof forward of an inner end portion thereof. The rear tank has a rear opposition side surface opposed to a rear side surface of the control valve while being oblique to the rear side surface thereto.

First claim

The invention claimed is:

1. An upper slewing body mounted on a lower traveling body of a construction machine, the upper slewing body comprising:
an upper frame mounted on the lower traveling body so as to be able to be slewed around a slewing axis;
an engine mounted in the upper frame at a position rearward of the slewing axis in a frame front-rear direction that is a front-rear direction of the upper frame;
a hydraulic pump coupled to one of opposite end portions of the engine in a frame lateral direction to be driven by the engine, the frame lateral direction being a lateral direction of the upper frame;
a control valve mounted on the upper frame at a position rearward of the slewing axis and forward of the engine in the frame front-rear direction;
a hydraulic pipe interconnecting the hydraulic pump and the control valve; and
a rear tank mounted on the upper frame at a position between the engine and the control valve with respect to the frame front-rear direction, wherein:
the control valve has an inner end portion and an outer end portion which are two opposite end portions in the frame lateral direction, the inner end portion being closer to the slewing axis than the outer end portion;
the control valve is disposed so as to locate the outer end portion on the same side as the hydraulic pump, relative to the slewing axis, in the frame lateral direction;
the control valve is mounted on the upper frame obliquely to the frame lateral direction so as to locate the outer end portion rearward of the inner end portion in the frame front-rear direction;
the hydraulic pipe connects the hydraulic pump to a connection portion of the control valve, the connection portion being closer to the outer end portion than the inner end portion; and
the rear tank includes an overlap portion overlapping the control valve as viewed in the frame front-rear direction, the overlap portion including a rear opposition side surface oblique to the frame lateral direction in the same direction as a direction in which a rear side surface of the control valve is oblique, the rear opposition side surface being opposed to the rear side surface.

2. The upper slewing body according to claim 1 , wherein the rear tank has a shape in a top plan view, the shape being a remainder of a rectangle from which a specific corner portion thereof has been cut out along the rear opposition side surface, the rectangle extending in the frame lateral direction, the specific corner portion being closest to the control valve of four corner portions of the rectangle.

3. The upper slewing body according to claim 1 , wherein the rear tank is located inward of the control valve in the frame lateral direction.

4. The upper slewing body according to claim 3 , wherein the outer end portion of the control valve is aligned with the hydraulic pump in the frame front-rear direction, and the hydraulic pipe is routed between the control valve and the hydraulic pump in a region on the outer side of the rear tank in the frame lateral direction.

5. The upper slewing body according to claim 1 , wherein the upper frame includes a bottom portion, a right vertical plate and a left vertical plate, the right and left vertical plates arranged in juxtaposition to each other in the frame lateral direction, in a central region of the upper frame with respect to the frame lateral direction, each of the right and left vertical plates extending in the frame front-rear direction and projecting upward beyond the bottom portion, and the rear tank is disposed across over one plate of the right and left vertical plates, the one plate being closer to the control valve, in the frame lateral direction.

6. The upper slewing body according to claim 1 , further comprising a front tank mounted on the upper frame at a position forward of the control valve in the frame front-rear direction, the front tank including an overlap portion overlapping the control valve as viewed in the frame front-rear direction, the overlap portion including a front opposition side surface opposed to a front side surface of the control valve while being oblique to the frame lateral direction in the same direction as a direction in which the control valve is oblique.

7. The upper slewing body according to claim 6 , wherein the front tank has a shape in a top plan view, the shape being a remainder of a rectangle from which a specific corner portion thereof has been cut out along the from opposition side surface, the rectangle extending in the frame lateral direction, the specific corner portion being closest to the control valve of four corner portions of the rectangle.

8. The upper slewing body according to claim 6 , wherein the front tank includes a protruding portion which protrudes outward beyond the outer end portion of the control valve in the frame lateral direction, and the hydraulic pipe is routed so as to be aligned with the protruding portion in the frame front-rear direction.

Assignees

• Kobelco Constr Mach Co Ltd

Inventors

• Ueta Toshiro

Classifications

• E02F9/2267

  Valves or distributors (position of valves arrangements on upper-structures E02F9/0875) · CPC title

• E02F9/0883

  Tanks, e.g. oil tank, urea tank, fuel tank (for vehicles in general B60K15/00) · CPC title

• E02F9/123 Primary

  Drives or control devices specially adapted therefor (E02F9/125 and E02F9/128 take precedence) · CPC title

• E02F9/0866

  Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment · CPC title

• E02F9/0875 Primary

  Arrangement of valve arrangements on superstructures (arrangement of hydraulic hoses E02F9/2275 takes precedence; valves per se E02F9/2267) · CPC title