# US 2020/0399868 A1 · Revolving work vehicle, and method for detecting position of working end of revolving work vehicle

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- Number: US 2020/0399868 A1
- Document ID: US20200399868A1
- Status: Published application
- Kind: A1
- Application number: 16/975,969
- Filed: 2019-01-24
- Published: 2020-12-24
- Earliest claimed: 2018-03-13
- Assignees: Yanmar Power Technology Co., Ltd.
- Applicants: Yanmar Power Technology Co., Ltd.
- Inventors: Kohei Okazaki
- Web page: https://patentgrep.com/patent/US20200399868A1

## CPC

- E02F 9/264: {Sensors and their calibration for indicating the position of the work tool}
- B62D 33/08: comprising adjustable means (B62D33/10 takes precedence)
- E02F 3/32: working downwardly and towards the machine, e.g. with backhoes
- E02F 3/431: {for bucket-arms, front-end loaders, dumpers or the like}
- E02F 9/08: Superstructures; Supports for superstructures {(arrangements for travelling gear, e.g. undercarriages for wheels, crawlers, caterpillars E02F9/02; for motor vehicles B62D25/00, B62D33/00)}
- E02F 9/123: {Drives or control devices specially adapted therefor (E02F9/125 and E02F9/128 take precedence)}
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

The present invention includes: a base carrier; a revolving superstructure provided above the base carrier in a manner capable of revolving; a boom bracket supported by the revolving superstructure in a horizontally rotatable manner; a work machine supported by the boom bracket in a vertically rotatable manner; a first position detecting device that detects a horizontal position of the boom bracket with respect to the revolving superstructure; a second position detecting device that detects a vertical position of the work machine with respect to the revolving superstructure; and an arithmetic unit that calculates a position of a working end of the work machine based on the results of detection by those position detecting devices.

## Claims

### Claim 1

A revolving work vehicle comprising:
a base carrier;
a revolving superstructure provided above the base carrier in a manner capable of revolving;
a swing body supported by the revolving superstructure in a horizontally rotatable manner;
a work machine supported by the swing body in a vertically rotatable manner;
a first position detecting device that detects a horizontal position of the swing body with respect to the revolving superstructure;
a second position detecting device that detects a vertical position of the work machine with respect to the revolving superstructure; and
an arithmetic unit that calculates a position of a working end of the work machine based on results of detection by the first and second position detecting devices.

### Claim 2 (depends on 1)

The revolving work vehicle according to claim 1, wherein
the first position detecting device includes a position sensor that is installed on the swing body.

### Claim 3 (depends on 1)

The revolving work vehicle according to claim 1, wherein
the work machine includes: a boom that is attached in a vertically rotatable manner to the swing body; an arm that is attached in a vertically rotatable manner to the boom; and a work attachment that is attached in a vertically rotatable manner to the arm, the working end being included in the work attachment, and
the second position measuring device includes: a position sensor that is installed on the boom; a position sensor that is installed on the arm; and a position sensor that is installed on a link for transmitting drive power to the work attachment.

### Claim 4

A method for detecting a position of a working end of a revolving work vehicle, the method being used for the revolving work vehicle including: a revolving superstructure provided above a base carrier in a manner capable of revolving; a swing body supported by the revolving superstructure in a horizontally rotatable manner; and a work machine supported by the swing body in a vertically rotatable manner, the method for detecting the position of the working end of the revolving work vehicle comprising:
detecting a horizontal position of the swing body with respect to the revolving superstructure by a first position detecting device;
detecting a vertical position of the work machine with respect to the revolving superstructure by a second position detecting device; and
calculating the position of the working end of the work machine based on results of detection by the first and second position detecting devices.