# US 2021/0277626 A1 · Rotary working vehicle

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- Number: US 2021/0277626 A1
- Document ID: US20210277626A1
- Status: Published application
- Kind: A1
- Application number: 17/251,668
- Filed: 2019-06-04
- Published: 2021-09-09
- Earliest claimed: 2018-06-21
- Assignees: Yanmar Power Technology Co., Ltd.
- Applicants: Yanmar Power Technology Co., Ltd.
- Inventors: Mitsuyuki HATANAKA; Takahiro IKEDA
- Web page: https://patentgrep.com/patent/US20210277626A1

## CPC

- E02F 9/123: {Drives or control devices specially adapted therefor (E02F9/125 and E02F9/128 take precedence)}
- E02F 3/325: {Backhoes of the miniature type}
- E02F 9/0816: {Welded frame structure}
- E02F 9/0858: {Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units (E02F9/16, E02F9/18 take precedence)}
- E02F 9/121: {Turntables, i.e. structure rotatable about 360°}
- E02F 9/2271: {Actuators and supports therefor and protection therefor}
- E02F 9/2275: {Hoses and supports therefor and protection therefor}
- E02F 3/32: working downwardly and towards the machine, e.g. with backhoes
- E02F 3/382: {Connections to the frame; Supports for booms or arms (devices to connect booms or arms to tractors or similar machines E02F3/627; pivot joint assemblies in particular E02F9/006)}
- E02F 9/166: {movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins (seats for vehicles in general B60N2/00)}
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)

## Abstract

A rotary working vehicle is provided with: a lower traveling body; an upper rotating body; a rotating frame constituting the bottom of the upper rotating body; a boom bracket supported by the rotating frame so as to be capable pivoting horizontally; a first vertical plate and a second vertical plate, which are raised from the bottom plate of the rotating frame; a swing cylinder provided on the opposite side of the second vertical plate from the first vertical plate and connecting the rotating frame and the boom bracket; a protrusion piece protruding toward the swing cylinder from a side wall of the second vertical plate above the swing cylinder; a hose guide provided to the protrusion piece; and first and second hydraulic hoses which pass above the first vertical plate and the second vertical plate, extend downward from above through the hose guide, and reach the swing cylinder.

## Claims

### Claim 1

A rotary working vehicle, comprising:
a lower traveling body;
an upper rotating body rotatably disposed above the lower traveling body;
a rotating frame configuring a bottom portion of the upper rotating body;
a swing body horizontally rotatably supported by a front portion of the rotating frame;
a working machine supported rotatably in an up-down direction by the swing body;
a first vertical plate and a second vertical plate which are located at an interval in a left-right direction on a bottom plate of the rotating frame and disposed in a standing manner to extend in a front to back direction;
a hydraulic swing cylinder disposed on an opposite side of the first vertical plate with the second vertical plate in between and configured to connect the rotating frame and the swing body;
a protrusion piece protruding toward the swing cylinder from a side wall of the second vertical plate located above the swing cylinder;
a hose guide disposed at the protrusion piece; and
a hydraulic hose passing above the first vertical plate and the second vertical plate and extending downward from above through the hose guide to the swing cylinder.

### Claim 2 (depends on 1)

The rotary working vehicle according to claim 1, wherein the hose guide includes a recessed cutout portion formed by cutting out the protrusion piece and configured to accommodate the hydraulic hose, and a closure member configured to close an opening end of the recessed cutout portion.

### Claim 3 (depends on 1)

The rotary working vehicle according to claim 1, comprising
a hydraulic oil tank disposed outward of the second vertical plate in the left-right direction;
a bracket configured to fix a lower portion of the hydraulic oil tank to the protrusion piece; and
a cutout portion cut out in the bracket to be located corresponding to the hose guide.

### Claim 4 (depends on 2)

The rotary working vehicle according to claim 2, comprising
a hydraulic oil tank disposed outward of the second vertical plate in the left-right direction;
a bracket configured to fix a lower portion of the hydraulic oil tank to the protrusion piece; and
a cutout portion cut out in the bracket to be located corresponding to the hose guide.