# US 12,110,214 B2 · Work vehicle

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- Number: US 12,110,214 B2
- Document ID: US12110214B2
- Status: Granted
- Kind: B2
- Application number: 17/622,582
- Filed: 2020-06-24
- Published: 2022-08-11
- Granted: 2024-10-08
- Earliest claimed: 2019-06-28
- Assignees: Tadano Ltd.
- Applicants: Tadano Ltd.
- Inventors: Yoshitaka Saijo; Masanori Oshima; Seiji Takeda; Tatsuya Yamaguchi; Yudai Masuda
- Web page: https://patentgrep.com/patent/US12110214B2

## CPC

- B66C 23/78: Supports, e.g. outriggers, for mobile cranes
- B66C 23/80: hydraulically actuated
- B60S 9/12: of telescopic type
- B66C: CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21)
- B60S: SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

Provided is a work vehicle that can be transported by being loaded onto a trailer without having the outriggers removed. The work vehicle (rough terrain crane) is transported by being loaded onto a low bed trailer including a low bed and a high portion (first high bed, second high bed) higher than the low bed in at least one of the front and the rear of the low bed, and includes: outrigger units (front outrigger unit, rear outrigger unit) that are mounted to the front and rear of a vehicle body; and a lift unit that lifts and lowers the outrigger units (front outrigger unit, rear outrigger unit with respect to the vehicle body.

## Claims

### Claim 1

A work vehicle comprising:
a front outrigger unit provided on a front side of a vehicle body frame of the work vehicle; and
a rear outrigger unit provided on a rear side of a vehicle body frame,
wherein the rear outrigger unit includes:
a first pair of outriggers;
a first supporting unit that supports the first pair of outriggers, and is movably coupled to the vehicle body frame; and
a first lift unit that includes a cylinder provided at the vehicle body frame so as to be expandable and contractible in a vertical direction, and a rod inserted into the cylinder to support the first supporting unit, and moves the first supporting unit upward to lift positions of lower end portions of the first pair of outriggers along with a lifting operation of the cylinder,
wherein the front outrigger unit includes:
a second pair of outriggers;
a second supporting unit that supports the second pair of outriggers, and is movably coupled to the vehicle body frame; and
a second lift unit that includes a rotation shaft that is fixed to the vehicle body frame such that the second supporting unit is rotatable about the rotation shaft, and an engagement portion that is provided at the second support unit and to which a hook of a crane of the work vehicle is engaged, and that moves the second supporting unit upward to lift positions of lower end portions of the second pair of outriggers along with the rotation of the second supporting unit in conjunction with a lifting operation of the crane, and
wherein the work vehicle is placed on a trailer with the first pair of outriggers and the second pair of outriggers fixed in a raised position.

### Claim 2 (depends on 1)

The work vehicle according to claim 1, wherein the first lift unit includes a guide portion provided at the vehicle body frame to guide the first supporting unit, the guide portion extending along the vertical direction, and
wherein the first supporting unit is fixed to the raised position by the guide portion.

### Claim 3 (depends on 1)

The work vehicle: according to claim 1,
wherein the second lift unit includes
a coupling member that couples the vehicle body frame and the second supporting unit at a position below the rotation shaft, and is expandable and contractible in the front-rear direction along with the rotation of the unit in conjunction with a lifting operation of the crane, and
wherein the second supporting unit is fixed to the raised position by the coupling member.